NCBI Conserved Domain Search

C2 domain second repeat present in Synaptotagmin 4; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 4, a member of class 4 synaptotagmins, is located in the brain. It functions are unknown. It, like synaptotagmin-11, has an Asp to Ser substitution in its C2A domain. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176049 [Multi-domain] Cd Length: 136 Bit Score: 238.48 E-value: 6.71e-78

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLsANPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd08404    2 GELLLSLCYQPTTNRLTVVVLKARHLPKMDVSGL-ADPYVKVNLYYGKKRISKKKTHVKKCTLNPVFNESFVFDIPSEEL 80

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRLVLGADSPcPSGAAHWQEVCQNPRRQISKWHTLN 456
Cdd:cd08404   81 EDISVEFLVLDSDRVTKNEVIGRLVLGPKAS-GSGGHHWKEVCNPPRRQIAEWHMLC 136

C2A domain first repeat present in Synaptotagmins 4 and 11; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmins 4 and 11, class 4 synaptotagmins, are located in the brain. Their functions are unknown. They are distinguished from the other synaptotagmins by having and Asp to Ser substitution in their C2A domains. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176034 [Multi-domain] Cd Length: 128 Bit Score: 194.88 E-value: 5.25e-61

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 186 RGDLSIAIDYNFPKKALVVTILEARGLPAVEGQTGSADPYVKMTILPEKKHRVKTRVLRKTLEPAFDETFTFYGVPYSSL 265
Cdd:cd08388    2 LGTLFFSLRYNSEKKALLVNIIECRDLPAMDEQSGTSDPYVKLQLLPEKEHKVKTRVLRKTRNPVYDETFTFYGIPYNQL 81

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*
gi 242117955 266 SDLTLHFLVLSFDRFSRDDVIGEAMVPLAGVDPST-GRVHITQQI 309
Cdd:cd08388   82 QDLSLHFAVLSFDRYSRDDVIGEVVCPLAGADLLNeGELLVSREI 126

C2 domain second repeat present in Synaptotagmin; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. There are several classes of Synaptotagmins. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 175975 [Multi-domain] Cd Length: 134 Bit Score: 186.25 E-value: 1.43e-57

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd00276    1 GELLLSLSYLPTAERLTVVVLKARNLPPSDGKGLS-DPYVKVSLLQGGKKLKKKKTSVKKGTLNPVFNEAFSFDVPAEQL 79

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRLVLGADSPcPSGAAHWQEVCQNPRRQISKWHTL 455
Cdd:cd00276   80 EEVSLVITVVDKDSVGRNEVIGQVVLGPDSG-GEELEHWNEMLASPRKPIARWHKL 134

C2 domain second repeat present in Synaptotagmin 7; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 7, a member of class 2 synaptotagmins, is located in presynaptic plasma membranes in neurons, dense-core vesicles in endocrine cells, and lysosomes in fibroblasts. It has been shown to play a role in regulation of Ca2+-dependent lysosomal exocytosis in fibroblasts and may also function as a vesicular Ca2+-sensor. It is distinguished from the other synaptotagmins by having over 12 splice forms. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176050 [Multi-domain] Cd Length: 136 Bit Score: 172.22 E-value: 3.52e-52

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGlSANPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd08405    2 GELLLSLCYNPTANRITVNIIKARNLKAMDING-TSDPYVKVWLMYKDKRVEKKKTVIKKRTLNPVFNESFIFNIPLERL 80

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRLVLGADSPcPSGAAHWQEVCQNPRRQISKWHTL 455
Cdd:cd08405   81 RETTLIITVMDKDRLSRNDLIGKIYLGWKSG-GLELKHWKDMLSKPRQPVAQWHRL 135

C2 domain second repeat present in Synaptotagmin 1; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 1, a member of the class 1 synaptotagmins, is located in the brain and endocranium and localized to the synaptic vesicles and secretory granules. It functions as a Ca2+ sensor for fast exocytosis. It, like synaptotagmin-2, has an N-glycosylated N-terminus. Synaptotagmin 4, a member of class 4 synaptotagmins, is located in the brain. It functions are unknown. It, like synaptotagmin-11, has an Asp to Ser substitution in its C2A domain. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176047 [Multi-domain] Cd Length: 136 Bit Score: 154.48 E-value: 1.74e-45

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd08402    2 GDICFSLRYVPTAGKLTVVILEAKNLKKMDVGGLS-DPYVKIHLMQNGKRLKKKKTTIKKRTLNPYYNESFSFEVPFEQI 80

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRLVLGadsPCPSGAA--HWQEVCQNPRRQISKWHTL 455
Cdd:cd08402   81 QKVHLIVTVLDYDRIGKNDPIGKVVLG---CNATGAElrHWSDMLASPRRPIAQWHTL 135

C2A domain first repeat present in Synaptotagmins 1, 5, 6, 9, and 10; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 1, a member of class 1 synaptotagmins, is located in the brain and endocranium and localized to the synaptic vesicles and secretory granules. It functions as a Ca2+ sensor for fast exocytosis as do synaptotagmins 5, 6, and 10. It is distinguished from the other synaptotagmins by having an N-glycosylated N-terminus. Synaptotagmins 5, 6, and 10, members of class 3 synaptotagmins, are located primarily in the brain and localized to the active zone and plasma membrane. They is distinguished from the other synaptotagmins by having disulfide bonds at its N-terminus. Synaptotagmin 6 also regulates the acrosome reaction, a unique Ca2+-regulated exocytosis, in sperm. Synaptotagmin 9, a class 5 synaptotagmins, is located in the brain and localized to the synaptic vesicles. It is thought to be a Ca2+-sensor for dense-core vesicle exocytosis. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176031 [Multi-domain] Cd Length: 124 Bit Score: 141.25 E-value: 1.38e-40

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 186 RGDLSIAIDYNFPKKALVVTILEARGLPAVEgQTGSADPYVKMTILPEKKHRVKTRVLRKTLEPAFDETFTFyGVPYSSL 265
Cdd:cd08385    2 LGKLQFSLDYDFQSNQLTVGIIQAADLPAMD-MGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFTF-KVPYSEL 79

                         90       100       110
                 ....*....|....*....|....*....|..
gi 242117955 266 SDLTLHFLVLSFDRFSRDDVIGEAMVPLAGVD 297
Cdd:cd08385   80 GNKTLVFSVYDFDRFSKHDLIGEVRVPLLTVD 111

C2 domain second repeat present in Synaptotagmins 3, 5, 6, 9, and 10; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 3, a member of class 3 synaptotagmins, is located in the brain and localized to the active zone and plasma membrane. It functions as a Ca2+ sensor for fast exocytosis. It, along with synaptotagmins 5,6, and 10, has disulfide bonds at its N-terminus. Synaptotagmin 9, a class 5 synaptotagmins, is located in the brain and localized to the synaptic vesicles. It is thought to be a Ca2+-sensor for dense-core vesicle exocytosis. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176048 [Multi-domain] Cd Length: 134 Bit Score: 137.25 E-value: 7.12e-39

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd08403    1 GELMFSLCYLPTAGRLTLTIIKARNLKAMDITGFS-DPYVKVSLMCEGRRLKKKKTSVKKNTLNPTYNEALVFDVPPENV 79

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRLVLGADSPcPSGAAHWQEVCQNPRRQISKWHTL 455
Cdd:cd08403   80 DNVSLIIAVVDYDRVGHNELIGVCRVGPNAD-GQGREHWNEMLANPRKPIAQWHQL 134

C2A domain first repeat present in Synaptotagmin 7; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 7, a member of class 2 synaptotagmins, is located in presynaptic plasma membranes in neurons, dense-core vesicles in endocrine cells, and lysosomes in fibroblasts. It has been shown to play a role in regulation of Ca2+-dependent lysosomal exocytosis in fibroblasts and may also function as a vesicular Ca2+-sensor. It is distinguished from the other synaptotagmins by having over 12 splice forms. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176032 [Multi-domain] Cd Length: 125 Bit Score: 131.30 E-value: 9.10e-37

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 186 RGDLSIAIDYNFPKKALVVTILEARGLPAVEgQTGSADPYVKMTILPEKKHRVKTRVLRKTLEPAFDETFTFYGVPYSSL 265
Cdd:cd08386    2 LGRIQFSVSYDFQESTLTLKILKAVELPAKD-FSGTSDPFVKIYLLPDKKHKLETKVKRKNLNPHWNETFLFEGFPYEKL 80

                         90       100       110
                 ....*....|....*....|....*....|..
gi 242117955 266 SDLTLHFLVLSFDRFSRDDVIGEAMVPLAGVD 297
Cdd:cd08386   81 QQRVLYLQVLDYDRFSRNDPIGEVSLPLNKVD 112

C2 domain second repeat present in Synaptotagmin 17; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 17 is located in the brain, kidney, and prostate and is thought to be a peripheral membrane protein. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176055 [Multi-domain] Cd Length: 135 Bit Score: 116.14 E-value: 5.20e-31

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd08410    1 GELLLSLNYLPSAGRLNVDIIRAKQLLQTDMSQGS-DPFVKIQLVHGLKLIKTKKTSCMRGTIDPFYNESFSFKVPQEEL 79

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRLVLGADSPCPSGAAHWQEVCQNPRRQISKWHTL 455
Cdd:cd08410   80 ENVSLVFTVYGHNVKSSNDFIGRIVIGQYSSGPSETNHWRRMLNSQRTAVEQWHSL 135

C2A domain first repeat present in Synaptotagmins 15 and 17; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. It is thought to be involved in the trafficking and exocytosis of secretory vesicles in non-neuronal tissues and is Ca2+ independent. Human synaptotagmin 15 has 2 alternatively spliced forms that encode proteins with different C-termini. The larger, SYT15a, contains a N-terminal TM region, a putative fatty-acylation site, and 2 tandem C terminal C2 domains. The smaller, SYT15b, lacks the C-terminal portion of the second C2 domain. Unlike most other synaptotagmins it is nearly absent in the brain and rather is found in the heart, lungs, skeletal muscle, and testis. Synaptotagmin 17 is located in the brain, kidney, and prostate and is thought to be a peripheral membrane protein. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176036 [Multi-domain] Cd Length: 123 Bit Score: 109.27 E-value: 1.36e-28

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 187 GDLSIAIDYNFPKKALVVTILEARGLPAVEGQTGSADPYVKMTILPEKKHRVKTRVLRKTLEPAFDETFTFyGVPYSSLS 266
Cdd:cd08390    1 GRLWFSVQYDLEEEQLTVSLIKARNLPPRTKDVAHCDPFVKVCLLPDERRSLQSKVKRKTQNPNFDETFVF-QVSFKELQ 79

                         90       100       110
                 ....*....|....*....|....*....|....*..
gi 242117955 267 DLTLHFLVLSFDRFSRDDVIGEAMVPLAGVDPSTGRV 303
Cdd:cd08390   80 RRTLRLSVYDVDRFSRHCIIGHVLFPLKDLDLVKGGV 116

C2 domain second repeat present in Synaptotagmin 13; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 13, a member of class 6 synaptotagmins, is located in the brain. It functions are unknown. It, like synaptotagmins 8 and 12, does not have any consensus Ca2+ binding sites. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176052 [Multi-domain] Cd Length: 138 Bit Score: 109.68 E-value: 1.60e-28

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 319 HGELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSANPY-VKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAE 397
Cdd:cd08407    1 TGEVLLSISYLPAANRLLVVVIKAKNLHSDQLKLLLGIDVsVKVTLKHQNAKLKKKQTKRAKHKINPVWNEMIMFELPSE 80

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 242117955 398 LLPDISIEFLVMDFDRTTKNQALGRLVLGADSpCPSGAAHWQEVCQNPRRQISKWHTL 455
Cdd:cd08407   81 LLAASSVELEVLNQDSPGQSLPLGRCSLGLHT-SGTERQHWEEMLDNPRRQIAMWHQL 137

C2 domain second repeat present in Synaptotagmin 12; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 12, a member of class 6 synaptotagmins, is located in the brain. It functions are unknown. It, like synaptotagmins 8 and 13, do not have any consensus Ca2+ binding sites. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176051 [Multi-domain] Cd Length: 136 Bit Score: 106.41 E-value: 1.87e-27

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLpKLDITGLSANPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd08406    2 GEILLSLSYLPTAERLTVVVVKARNL-VWDNGKTTADPFVKVYLLQDGRKISKKKTSVKRDDTNPIFNEAMIFSVPAIVL 80

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRLVLGadsPCPSGAA--HWQEVCQNPRRQISKWHTL 455
Cdd:cd08406   81 QDLSLRVTVAESTEDGKTPNVGHVIIG---PAASGMGlsHWNQMLASLRKPVAMWHPL 135

C2 domain;

Pssm-ID: 425499 [Multi-domain] Cd Length: 104 Bit Score: 102.40 E-value: 2.54e-26

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955  202 LVVTILEARGLPAVEGqTGSADPYVKMTILpEKKHRVKTRVLRKTLEPAFDETFTFygvPYSSLSDLTLHFLVLSFDRFS 281
Cdd:pfam00168   3 LTVTVIEAKNLPPKDG-NGTSDPYVKVYLL-DGKQKKKTKVVKNTLNPVWNETFTF---SVPDPENAVLEIEVYDYDRFG 77

                          90       100
                  ....*....|....*....|...
gi 242117955  282 RDDVIGEAMVPLAGVDPSTGRVH 304
Cdd:pfam00168  78 RDDFIGEVRIPLSELDSGEGLDG 100

C2 domain;

Pssm-ID: 425499 [Multi-domain] Cd Length: 104 Bit Score: 101.24 E-value: 6.17e-26

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955  333 HRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKriaKKKTHVKKCTLNPVFNESFIYDVPAEllPDISIEFLVMDFD 412
Cdd:pfam00168   1 GRLTVTVIEAKNLPPKDGNGTS-DPYVKVYLLDGKQ---KKKTKVVKNTLNPVWNETFTFSVPDP--ENAVLEIEVYDYD 74

                          90       100
                  ....*....|....*....|....*..
gi 242117955  413 RTTKNQALGRLVLGADSPCPS-GAAHW 438
Cdd:pfam00168  75 RFGRDDFIGEVRIPLSELDSGeGLDGW 101

C2 domain second repeat present in Synaptotagmin 15; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. It is thought to be involved in the trafficking and exocytosis of secretory vesicles in non-neuronal tissues and is Ca2+ independent. Human synaptotagmin 15 has 2 alternatively spliced forms that encode proteins with different C-termini. The larger, SYT15a, contains a N-terminal TM region, a putative fatty-acylation site, and 2 tandem C terminal C2 domains. The smaller, SYT15b, lacks the C-terminal portion of the second C2 domain. Unlike most other synaptotagmins it is nearly absent in the brain and rather is found in the heart, lungs, skeletal muscle, and testis. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176054 [Multi-domain] Cd Length: 137 Bit Score: 102.41 E-value: 6.56e-26

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITglSANPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd08409    2 GDIQISLTYNPTLNRLTVVVLRARGLRQLDHA--HTSVYVKVSLMIHNKVVKTKKTEVVDGAASPSFNESFSFKVTSRQL 79

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRLVLGADSPCpSGA--AHWQEVCQNPRRQISKWHTL 455
Cdd:cd08409   80 DTASLSLSVMQSGGVRKSKLLGRVVLGPFMYA-RGKelEHWNDMLSKPKELIKRWHAL 136

C2 domain second repeat present in Synaptotagmins 14 and 16; Synaptotagmin 14 and 16 are membrane-trafficking proteins in specific tissues outside the brain. Both of these contain C-terminal tandem C2 repeats, but only Synaptotagmin 14 has an N-terminal transmembrane domain and a putative fatty-acylation site. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium and this is indeed the case here. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176053 [Multi-domain] Cd Length: 138 Bit Score: 98.98 E-value: 9.57e-25

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 321 ELLVSLSYQPVSHRLSVVVLKAKHLPKLditGLSANP--YVKLNVFYGH-KRIAKKKTHVKKCTLNPVFNESFIYDVPAE 397
Cdd:cd08408    3 ELLLGLEYNALTGRLSVEVIKGSNFKNL---AMNKAPdtYVKLTLLNSDgQEISKSKTSIRRGQPDPEFKETFVFQVALF 79

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*....
gi 242117955 398 LLPDISIEFLVMDFDRTTKNQALGRLVLGADSPCPSGAAHWQEVCQNPRRQISKWHTLN 456
Cdd:cd08408   80 QLSEVTLMFSVYNKRKMKRKEMIGWFSLGLNSSGEEEEEHWNEMKESKGQQVCRWHTLL 138

C2 domain second repeat present in Rabphilin and Double C2 domain; Rabphilin is found neurons and in neuroendrocrine cells, while Doc2 is found not only in the brain but in tissues, including mast cells, chromaffin cells, and osteoblasts. Rabphilin and Doc2s share highly homologous tandem C2 domains, although their N-terminal structures are completely different: rabphilin contains an N-terminal Rab-binding domain (RBD),7 whereas Doc2 contains an N-terminal Munc13-1-interacting domain (MID). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176030 [Multi-domain] Cd Length: 133 Bit Score: 97.80 E-value: 2.50e-24

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 322 LLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELLPD 401
Cdd:cd08384    2 ILVSLMYNTQRRGLIVGIIRCVNLAAMDANGYS-DPFVKLYLKPDAGKKSKHKTQVKKKTLNPEFNEEFFYDIKHSDLAK 80

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 242117955 402 ISIEFLVMDFDRTTKNQALGRLVLGADSpcpSGAA--HWQEVCQNPRRQISKWHTL 455
Cdd:cd08384   81 KTLEITVWDKDIGKSNDYIGGLQLGINA---KGERlrHWLDCLKNPDKKIEAWHTL 133

C2 domain first repeat present in Rabphilin and Double C2 domain; Rabphilin is found neurons and in neuroendrocrine cells, while Doc2 is found not only in the brain but in tissues, including mast cells, chromaffin cells, and osteoblasts. Rabphilin and Doc2s share highly homologous tandem C2 domains, although their N-terminal structures are completely different: rabphilin contains an N-terminal Rab-binding domain (RBD),7 whereas Doc2 contains an N-terminal Munc13-1-interacting domain (MID). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176000 [Multi-domain] Cd Length: 123 Bit Score: 95.81 E-value: 1.01e-23

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 186 RGDLSIAIDYNFPKKALVVTILEARGLPAVeGQTGSADPYVKMTILPE--KKHRVKTRVLRKTLEPAFDETFTFYGVPYS 263
Cdd:cd04035    1 LGTLEFTLLYDPANSALHCTIIRAKGLKAM-DANGLSDPYVKLNLLPGasKATKLRTKTVHKTRNPEFNETLTYYGITEE 79

                         90       100       110
                 ....*....|....*....|....*....|
gi 242117955 264 SLSDLTLHFLVLSFDRFsRDDVIGEAMVPL 293
Cdd:cd04035   80 DIQRKTLRLLVLDEDRF-GNDFLGETRIPL 108

C2A domain first repeat present in Synaptotagmin 8; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176033 [Multi-domain] Cd Length: 124 Bit Score: 95.93 E-value: 1.04e-23

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 185 SRGDLSIAIDYNFPKKALVVTILEARGLPAVEgQTGSADPYVKMTILPEKKHRVKTRVLRKTLEPAFDETFTFyGVPYSS 264
Cdd:cd08387    1 TRGELHFSLEYDKDMGILNVKLIQARNLQPRD-FSGTADPYCKVRLLPDRSNTKQSKIHKKTLNPEFDESFVF-EVPPQE 78

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*
gi 242117955 265 LSDLTLHFLVLSFDRFSRDDVIGEAMVPLAGVDPStGRVHITQQI 309
Cdd:cd08387   79 LPKRTLEVLLYDFDQFSRDECIGVVELPLAEVDLS-EKLDLWRKI 122

C2 domain in Protein Kinase C (PKC) alpha and gamma; A single C2 domain is found in PKC alpha and gamma. The PKC family of serine/threonine kinases regulates apoptosis, proliferation, migration, motility, chemo-resistance, and differentiation. There are 3 groups: group 1(alpha, betaI, beta II, gamma) which require phospholipids and calcium, group 2 (delta, epsilon, theta, eta) which do not require calcium for activation, and group 3 (xi, iota/lambda) which are atypical and can be activated in the absence of diacylglycerol and calcium. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-I topology.

Pssm-ID: 175992 [Multi-domain] Cd Length: 131 Bit Score: 92.71 E-value: 1.54e-22

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQpvSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDV-PAEL 398
Cdd:cd04026    2 GRIYLKISVK--DNKLTVEVREAKNLIPMDPNGLS-DPYVKLKLIPDPKNETKQKTKTIKKTLNPVWNETFTFDLkPADK 78

                         90       100
                 ....*....|....*....|....*...
gi 242117955 399 LPDISIEflVMDFDRTTKNQALGRLVLG 426
Cdd:cd04026   79 DRRLSIE--VWDWDRTTRNDFMGSLSFG 104

Protein kinase C conserved region 2 (CalB); Ca2+-binding motif present in phospholipases, protein kinases C, and synaptotagmins (among others). Some do not appear to contain Ca2+-binding sites. Particular C2s appear to bind phospholipids, inositol polyphosphates, and intracellular proteins. Unusual occurrence in perforin. Synaptotagmin and PLC C2s are permuted in sequence with respect to N- and C-terminal beta strands. SMART detects C2 domains using one or both of two profiles.

Pssm-ID: 214577 [Multi-domain] Cd Length: 101 Bit Score: 91.78 E-value: 1.58e-22

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955   202 LVVTILEARGLPAVEGqTGSADPYVKMTILPEKKHRVKTRVLRKTLEPAFDETFTFYGVPyssLSDLTLHFLVLSFDRFS 281
Cdd:smart00239   2 LTVKIISARNLPPKDK-GGKSDPYVKVSLDGDPKEKKKTKVVKNTLNPVWNETFEFEVPP---PELAELEIEVYDKDRFG 77

                           90       100
                   ....*....|....*....|...
gi 242117955   282 RDDVIGEAMVPLAGVDPSTGRVH 304
Cdd:smart00239  78 RDDFIGQVTIPLSDLLLGGRHEK 100

C2 domain; The C2 domain was first identified in PKC. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 175973 [Multi-domain] Cd Length: 102 Bit Score: 91.74 E-value: 1.63e-22

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPAVEGqTGSADPYVKMTILPEKKHrvKTRVLRKTLEPAFDETFTFygvPYSSLSDLTLHFLVLSFDRFS 281
Cdd:cd00030    1 LRVTVIEARNLPAKDL-NGKSDPYVKVSLGGKQKF--KTKVVKNTLNPVWNETFEF---PVLDPESDTLTVEVWDKDRFS 74

                         90       100
                 ....*....|....*....|
gi 242117955 282 RDDVIGEAMVPLAGVDPSTG 301
Cdd:cd00030   75 KDDFLGEVEIPLSELLDSGK 94

C2 domain first repeat present in Synaptotagmin-like proteins; All Slp members basically share an N-terminal Slp homology domain (SHD) and C-terminal tandem C2 domains (named the C2A domain and the C2B domain) with the SHD and C2 domains being separated by a linker sequence of various length. Slp1/JFC1 and Slp2/exophilin 4 promote granule docking to the plasma membrane. Additionally, their C2A domains are both Ca2+ independent, unlike the case in Slp3 and Slp4/granuphilin in which their C2A domains are Ca2+ dependent. It is thought that SHD (except for the Slp4-SHD) functions as a specific Rab27A/B-binding domain. In addition to Slps, rabphilin, Noc2, and Munc13-4 also function as Rab27-binding proteins. It has been demonstrated that Slp3 and Slp4/granuphilin promote dense-core vesicle exocytosis. Slp5 mRNA has been shown to be restricted to human placenta and liver suggesting a role in Rab27A-dependent membrane trafficking in specific tissues. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176056 [Multi-domain] Cd Length: 123 Bit Score: 89.24 E-value: 2.24e-21

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 187 GDLSIAIDYNFPKKALVVTILEARGLPAVEGQTGSADPYVKMTILPEKKHR--VKTRVLRKTLEPAFDETFTfYGVPYSS 264
Cdd:cd08521    1 GEIEFSLSYNYKTGSLEVHIKECRNLAYADEKKKRSNPYVKVYLLPDKSKQskRKTSVKKNTTNPVFNETLK-YHISKSQ 79

                         90       100       110
                 ....*....|....*....|....*....|...
gi 242117955 265 LSDLTLHFLVLSFDRFSRDDVIGEAMVPLAGVD 297
Cdd:cd08521   80 LETRTLQLSVWHHDRFGRNTFLGEVEIPLDSWD 112

Protein kinase C conserved region 2 (CalB); Ca2+-binding motif present in phospholipases, protein kinases C, and synaptotagmins (among others). Some do not appear to contain Ca2+-binding sites. Particular C2s appear to bind phospholipids, inositol polyphosphates, and intracellular proteins. Unusual occurrence in perforin. Synaptotagmin and PLC C2s are permuted in sequence with respect to N- and C-terminal beta strands. SMART detects C2 domains using one or both of two profiles.

Pssm-ID: 214577 [Multi-domain] Cd Length: 101 Bit Score: 87.16 E-value: 6.57e-21

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955   334 RLSVVVLKAKHLPKLDITGLSaNPYVKlnVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELLPDISIEflVMDFDR 413
Cdd:smart00239   1 TLTVKIISARNLPPKDKGGKS-DPYVK--VSLDGDPKEKKKTKVVKNTLNPVWNETFEFEVPPPELAELEIE--VYDKDR 75

                           90
                   ....*....|..
gi 242117955   414 TTKNQALGRLVL 425
Cdd:smart00239  76 FGRDDFIGQVTI 87

C2 domain second repeat present in Synaptotagmin 4; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 4, a member of class 4 synaptotagmins, is located in the brain. It functions are unknown. It, like synaptotagmin-11, has an Asp to Ser substitution in its C2A domain. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176049 [Multi-domain] Cd Length: 136 Bit Score: 87.87 E-value: 1.08e-20

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 186 RGDLSIAIDYNFPKKALVVTILEARGLPAVEgQTGSADPYVKMTILPEKKhRV---KTRVLRKTLEPAFDETFTFyGVPY 262
Cdd:cd08404    1 RGELLLSLCYQPTTNRLTVVVLKARHLPKMD-VSGLADPYVKVNLYYGKK-RIskkKTHVKKCTLNPVFNESFVF-DIPS 77

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 242117955 263 SSLSDLTLHFLVLSFDRFSRDDVIGEAMvpLAGVDPSTGRVHIT-------QQITKRNMQC 316
Cdd:cd08404   78 EELEDISVEFLVLDSDRVTKNEVIGRLV--LGPKASGSGGHHWKevcnpprRQIAEWHMLC 136

C2 domain second repeat present in Synaptotagmin 7; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 7, a member of class 2 synaptotagmins, is located in presynaptic plasma membranes in neurons, dense-core vesicles in endocrine cells, and lysosomes in fibroblasts. It has been shown to play a role in regulation of Ca2+-dependent lysosomal exocytosis in fibroblasts and may also function as a vesicular Ca2+-sensor. It is distinguished from the other synaptotagmins by having over 12 splice forms. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176050 [Multi-domain] Cd Length: 136 Bit Score: 87.47 E-value: 1.23e-20

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 186 RGDLSIAIDYNFPKKALVVTILEARGLPAVEgQTGSADPYVKMTILPEKKhRV---KTRVLRKTLEPAFDETFTFyGVPY 262
Cdd:cd08405    1 RGELLLSLCYNPTANRITVNIIKARNLKAMD-INGTSDPYVKVWLMYKDK-RVekkKTVIKKRTLNPVFNESFIF-NIPL 77

                         90       100       110
                 ....*....|....*....|....*....|
gi 242117955 263 SSLSDLTLHFLVLSFDRFSRDDVIGEAMVP 292
Cdd:cd08405   78 ERLRETTLIITVMDKDRLSRNDLIGKIYLG 107

C2 domain third repeat present in uncharacterized human KIAA1228-like proteins; KIAA proteins are uncharacterized human proteins. They were compiled by the Kazusa mammalian cDNA project which identified more than 2000 human genes. They are identified by 4 digit codes that precede the KIAA designation. Many KIAA genes are still functionally uncharacterized including KIAA1228. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the third C2 repeat, C2C, and has a type-II topology.

Pssm-ID: 175996 [Multi-domain] Cd Length: 127 Bit Score: 86.94 E-value: 1.45e-20

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 185 SRGDLSIAIDYNFPKKALVVTILEARGLPAVEgQTGSADPYVKMTILPEKK--HRVKTRVLRKTLEPAFDETFTFYgVPY 262
Cdd:cd04030    1 PLGRIQLTIRYSSQRQKLIVTVHKCRNLPPCD-SSDIPDPYVRLYLLPDKSksTRRKTSVKKDNLNPVFDETFEFP-VSL 78

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|.
gi 242117955 263 SSLSDLTLHFLVL-SFDRFSRD-DVIGEAMVPLAGVDPSTG 301
Cdd:cd04030   79 EELKRRTLDVAVKnSKSFLSREkKLLGQVLIDLSDLDLSKG 119

C2 domain; The C2 domain was first identified in PKC. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 175973 [Multi-domain] Cd Length: 102 Bit Score: 83.66 E-value: 1.31e-19

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRiakkKTHVKKCTLNPVFNESFIYDVPAELLPDISIEflVMDFDRT 414
Cdd:cd00030    1 LRVTVIEARNLPAKDLNGKS-DPYVKVSLGGKQKF----KTKVVKNTLNPVWNETFEFPVLDPESDTLTVE--VWDKDRF 73

                         90       100
                 ....*....|....*....|
gi 242117955 415 TKNQALGRLVLGADSPCPSG 434
Cdd:cd00030   74 SKDDFLGEVEIPLSELLDSG 93

C2A domain first repeat present in Synaptotagmins 15 and 17; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. It is thought to be involved in the trafficking and exocytosis of secretory vesicles in non-neuronal tissues and is Ca2+ independent. Human synaptotagmin 15 has 2 alternatively spliced forms that encode proteins with different C-termini. The larger, SYT15a, contains a N-terminal TM region, a putative fatty-acylation site, and 2 tandem C terminal C2 domains. The smaller, SYT15b, lacks the C-terminal portion of the second C2 domain. Unlike most other synaptotagmins it is nearly absent in the brain and rather is found in the heart, lungs, skeletal muscle, and testis. Synaptotagmin 17 is located in the brain, kidney, and prostate and is thought to be a peripheral membrane protein. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176036 [Multi-domain] Cd Length: 123 Bit Score: 83.46 E-value: 2.65e-19

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSANPYVKLNVFYGHKRiaKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd08390    1 GRLWFSVQYDLEEEQLTVSLIKARNLPPRTKDVAHCDPFVKVCLLPDERR--SLQSKVKRKTQNPNFDETFVFQVSFKEL 78

                         90       100
                 ....*....|....*....|....*.
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRLVL 425
Cdd:cd08390   79 QRRTLRLSVYDVDRFSRHCIIGHVLF 104

C2 domain first repeat contained in Rab3-interacting molecule (RIM) proteins; RIMs are believed to organize specialized sites of the plasma membrane called active zones. They also play a role in controlling neurotransmitter release, plasticity processes, as well as memory and learning. RIM contains an N-terminal zinc finger domain, a PDZ domain, and two C-terminal C2 domains (C2A, C2B). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-I topology and do not bind Ca2+.

Pssm-ID: 175997 [Multi-domain] Cd Length: 125 Bit Score: 83.45 E-value: 2.74e-19

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 187 GDLSIAIDYNFPKKALVVTILEARGLPAVEgQTGSADPYVKMTILPEK--KHRVKTRVLRKTLEPAFDETFTFYGVPYSS 264
Cdd:cd04031    3 GRIQIQLWYDKVTSQLIVTVLQARDLPPRD-DGSLRNPYVKVYLLPDRseKSKRRTKTVKKTLNPEWNQTFEYSNVRRET 81

                         90       100       110
                 ....*....|....*....|....*....|
gi 242117955 265 LSDLTLHFLVLSFDRFSRDDVIGEAMVPLA 294
Cdd:cd04031   82 LKERTLEVTVWDYDRDGENDFLGEVVIDLA 111

C2 domain second repeat present in Synaptotagmin-like proteins 1-4; All Slp members basically share an N-terminal Slp homology domain (SHD) and C-terminal tandem C2 domains (named the C2A domain and the C2B domain) with the SHD and C2 domains being separated by a linker sequence of various length. Slp1/JFC1 and Slp2/exophilin 4 promote granule docking to the plasma membrane. Additionally, their C2A domains are both Ca2+ independent, unlike the case in Slp3 and Slp4/granuphilin in which their C2A domains are Ca2+ dependent. It is thought that SHD (except for the Slp4-SHD) functions as a specific Rab27A/B-binding domain. In addition to Slps, rabphilin, Noc2, and Munc13-4 also function as Rab27-binding proteins. It has been demonstrated that Slp3 and Slp4/granuphilin promote dense-core vesicle exocytosis. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 175987 [Multi-domain] Cd Length: 162 Bit Score: 83.91 E-value: 4.46e-19

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSY-QPVSHR-----------LSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFN 387
Cdd:cd04020    2 GELKVALKYvPPESEGalkskkpstgeLHVWVKEAKNLPALKSGGTS-DSFVKCYLLPDKSKKSKQKTPVVKKSVNPVWN 80

                         90       100       110       120       130       140       150
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 242117955 388 ESFIYD-VPAELLPDISIEFLVMDFDRTTKNQALG--RLVLGADSPC----------PSGAAHWQEVCQNP 445
Cdd:cd04020   81 HTFVYDgVSPEDLSQACLELTVWDHDKLSSNDFLGgvRLGLGTGKSYgqavdwmdstGEEILLWQKMLDNP 151

C2A domain first repeat present in Synaptotagmins 14 and 16; Synaptotagmin 14 and 16 are membrane-trafficking proteins in specific tissues outside the brain. Both of these contain C-terminal tandem C2 repeats, but only Synaptotagmin 14 has an N-terminal transmembrane domain and a putative fatty-acylation site. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium and this is indeed the case here. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176035 [Multi-domain] Cd Length: 124 Bit Score: 82.67 E-value: 4.83e-19

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 187 GDLSIAIDYNFPKKALVVTILEARGLPAVEgQTGSADPYVKMTILPEKKHRVKTRVlRKTLEPAFDETFTFYGVPYSSLS 266
Cdd:cd08389    3 GDLDVAFEYDPSARKLTVTVIRAQDIPTKD-RGGASSWQVHLVLLPSKKQRAKTKV-QRGPNPVFNETFTFSRVEPEELN 80

                         90       100       110
                 ....*....|....*....|....*....|..
gi 242117955 267 DLTLHFLVLSFDRFSRDDVIGEAMVPLAGVDP 298
Cdd:cd08389   81 NMALRFRLYGVERMRKERLIGEKVVPLSQLNL 112

C2 domain second repeat in Munc13 (mammalian uncoordinated)-like proteins; C2-like domains are thought to be involved in phospholipid binding in a Ca2+ independent manner in both Unc13 and Munc13. Caenorabditis elegans Unc13 has a central domain with sequence similarity to PKC, which includes C1 and C2-related domains. Unc13 binds phorbol esters and DAG with high affinity in a phospholipid manner. Mutations in Unc13 results in abnormal neuronal connections and impairment in cholinergic neurotransmission in the nematode. Munc13 is the mammalian homolog which are expressed in the brain. There are 3 isoforms (Munc13-1, -2, -3) and are thought to play a role in neurotransmitter release and are hypothesized to be high-affinity receptors for phorbol esters. Unc13 and Munc13 contain both C1 and C2 domains. There are two C2 related domains present, one central and one at the carboxyl end. Munc13-1 contains a third C2-like domain. Munc13 interacts with syntaxin, synaptobrevin, and synaptotagmin suggesting a role for these as scaffolding proteins. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the third C2 repeat, C2C, and has a type-II topology.

Pssm-ID: 175976 [Multi-domain] Cd Length: 133 Bit Score: 81.13 E-value: 1.94e-18

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 186 RGDLSIAIDYNFPKKALVVTILEARGLPAVEgQTGSADPYVKMTILPEKK----HRVKTRVLRKTLEPAFDETFTFYgVP 261
Cdd:cd04009    2 YGVLTVKAYYRASEQSLRVEILNARNLLPLD-SNGSSDPFVKVELLPRHLfpdvPTPKTQVKKKTLFPLFDESFEFN-VP 79

                         90       100       110
                 ....*....|....*....|....*....|....*..
gi 242117955 262 --YSSLSDLTLHFLVLSFDRFSRDDVIGEAMVPLAGV 296
Cdd:cd04009   80 peQCSVEGALLLFTVKDYDLLGSNDFEGEAFLPLNDI 116

C2 domain second repeat in Munc13 (mammalian uncoordinated)-like proteins; C2-like domains are thought to be involved in phospholipid binding in a Ca2+ independent manner in both Unc13 and Munc13. Caenorabditis elegans Unc13 has a central domain with sequence similarity to PKC, which includes C1 and C2-related domains. Unc13 binds phorbol esters and DAG with high affinity in a phospholipid manner. Mutations in Unc13 results in abnormal neuronal connections and impairment in cholinergic neurotransmission in the nematode. Munc13 is the mammalian homolog which are expressed in the brain. There are 3 isoforms (Munc13-1, -2, -3) and are thought to play a role in neurotransmitter release and are hypothesized to be high-affinity receptors for phorbol esters. Unc13 and Munc13 contain both C1 and C2 domains. There are two C2 related domains present, one central and one at the carboxyl end. Munc13-1 contains a third C2-like domain. Munc13 interacts with syntaxin, synaptobrevin, and synaptotagmin suggesting a role for these as scaffolding proteins. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the third C2 repeat, C2C, and has a type-II topology.

Pssm-ID: 175976 [Multi-domain] Cd Length: 133 Bit Score: 80.74 E-value: 2.66e-18

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHK--RIAKKKTHVKKCTLNPVFNESFIYDVPAE 397
Cdd:cd04009    3 GVLTVKAYYRASEQSLRVEILNARNLLPLDSNGSS-DPFVKVELLPRHLfpDVPTPKTQVKKKTLFPLFDESFEFNVPPE 81

                         90       100
                 ....*....|....*....|....*.
gi 242117955 398 --LLPDISIEFLVMDFDRTTKNQALG 421
Cdd:cd04009   82 qcSVEGALLLFTVKDYDLLGSNDFEG 107

C2A domain first repeat present in Synaptotagmins 1, 5, 6, 9, and 10; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 1, a member of class 1 synaptotagmins, is located in the brain and endocranium and localized to the synaptic vesicles and secretory granules. It functions as a Ca2+ sensor for fast exocytosis as do synaptotagmins 5, 6, and 10. It is distinguished from the other synaptotagmins by having an N-glycosylated N-terminus. Synaptotagmins 5, 6, and 10, members of class 3 synaptotagmins, are located primarily in the brain and localized to the active zone and plasma membrane. They is distinguished from the other synaptotagmins by having disulfide bonds at its N-terminus. Synaptotagmin 6 also regulates the acrosome reaction, a unique Ca2+-regulated exocytosis, in sperm. Synaptotagmin 9, a class 5 synaptotagmins, is located in the brain and localized to the synaptic vesicles. It is thought to be a Ca2+-sensor for dense-core vesicle exocytosis. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176031 [Multi-domain] Cd Length: 124 Bit Score: 79.23 E-value: 8.45e-18

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRiaKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd08385    3 GKLQFSLDYDFQSNQLTVGIIQAADLPAMDMGGTS-DPYVKVYLLPDKKK--KFETKVHRKTLNPVFNETFTFKVPYSEL 79

                         90       100
                 ....*....|....*....|....*.
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRLVL 425
Cdd:cd08385   80 GNKTLVFSVYDFDRFSKHDLIGEVRV 105

C2 domain third repeat present in uncharacterized human KIAA1228-like proteins; KIAA proteins are uncharacterized human proteins. They were compiled by the Kazusa mammalian cDNA project which identified more than 2000 human genes. They are identified by 4 digit codes that precede the KIAA designation. Many KIAA genes are still functionally uncharacterized including KIAA1228. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the third C2 repeat, C2C, and has a type-II topology.

Pssm-ID: 175996 [Multi-domain] Cd Length: 127 Bit Score: 78.47 E-value: 1.59e-17

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd04030    3 GRIQLTIRYSSQRQKLIVTVHKCRNLPPCDSSDIP-DPYVRLYLLPDKSKSTRRKTSVKKDNLNPVFDETFEFPVSLEEL 81

                         90
                 ....*....|....*....
gi 242117955 400 PDisiEFLvmdfDRTTKNQ 418
Cdd:cd04030   82 KR---RTL----DVAVKNS 93

C2 domain second repeat present in Synaptotagmin-like proteins 1-4; All Slp members basically share an N-terminal Slp homology domain (SHD) and C-terminal tandem C2 domains (named the C2A domain and the C2B domain) with the SHD and C2 domains being separated by a linker sequence of various length. Slp1/JFC1 and Slp2/exophilin 4 promote granule docking to the plasma membrane. Additionally, their C2A domains are both Ca2+ independent, unlike the case in Slp3 and Slp4/granuphilin in which their C2A domains are Ca2+ dependent. It is thought that SHD (except for the Slp4-SHD) functions as a specific Rab27A/B-binding domain. In addition to Slps, rabphilin, Noc2, and Munc13-4 also function as Rab27-binding proteins. It has been demonstrated that Slp3 and Slp4/granuphilin promote dense-core vesicle exocytosis. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 175987 [Multi-domain] Cd Length: 162 Bit Score: 78.90 E-value: 2.83e-17

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 186 RGDLSIAIDY------------NFPKKALVVTILEARGLPAVEGQtGSADPYVKMTILP--EKKHRVKTRVLRKTLEPAF 251
Cdd:cd04020    1 RGELKVALKYvppesegalkskKPSTGELHVWVKEAKNLPALKSG-GTSDSFVKCYLLPdkSKKSKQKTPVVKKSVNPVW 79

                         90       100       110
                 ....*....|....*....|....*....|....*.
gi 242117955 252 DETFTFYGVPYSSLSDLTLHFLVLSFDRFSRDDVIG 287
Cdd:cd04020   80 NHTFVYDGVSPEDLSQACLELTVWDHDKLSSNDFLG 115

C2 domain in Protein Kinase C (PKC) alpha and gamma; A single C2 domain is found in PKC alpha and gamma. The PKC family of serine/threonine kinases regulates apoptosis, proliferation, migration, motility, chemo-resistance, and differentiation. There are 3 groups: group 1(alpha, betaI, beta II, gamma) which require phospholipids and calcium, group 2 (delta, epsilon, theta, eta) which do not require calcium for activation, and group 3 (xi, iota/lambda) which are atypical and can be activated in the absence of diacylglycerol and calcium. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-I topology.

Pssm-ID: 175992 [Multi-domain] Cd Length: 131 Bit Score: 76.53 E-value: 7.94e-17

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 186 RGDLSIAIDYNfpKKALVVTILEARGLPAVEgQTGSADPYVKMTILPEKKHRVK--TRVLRKTLEPAFDETFTFYGVPys 263
Cdd:cd04026    1 RGRIYLKISVK--DNKLTVEVREAKNLIPMD-PNGLSDPYVKLKLIPDPKNETKqkTKTIKKTLNPVWNETFTFDLKP-- 75

                         90       100
                 ....*....|....*....|....
gi 242117955 264 SLSDLTLHFLVLSFDRFSRDDVIG 287
Cdd:cd04026   76 ADKDRRLSIEVWDWDRTTRNDFMG 99

C2A domain first repeat present in Synaptotagmin 8; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176033 [Multi-domain] Cd Length: 124 Bit Score: 75.13 E-value: 2.31e-16

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGlSANPYVKLNVFYGHKRIAKKKTHVKkcTLNPVFNESFIYDVPAELL 399
Cdd:cd08387    3 GELHFSLEYDKDMGILNVKLIQARNLQPRDFSG-TADPYCKVRLLPDRSNTKQSKIHKK--TLNPEFDESFVFEVPPQEL 79

                         90       100
                 ....*....|....*....|..
gi 242117955 400 PDISIEFLVMDFDRTTKNQALG 421
Cdd:cd08387   80 PKRTLEVLLYDFDQFSRDECIG 101

C2 domain first repeat present in Synaptotagmin-like proteins 4 and 5; All Slp members basically share an N-terminal Slp homology domain (SHD) and C-terminal tandem C2 domains (named the C2A domain and the C2B domain) with the SHD and C2 domains being separated by a linker sequence of various length. SHD of Slp (except for the Slp4-SHD) function as a specific Rab27A/B-binding domain. In addition to Slp, rabphilin, Noc2, and Munc13-4 also function as Rab27-binding proteins. It has been demonstrated that Slp4/granuphilin promotes dense-core vesicle exocytosis. The C2A domain of Slp4 is Ca2+ dependent. Slp5 mRNA has been shown to be restricted to human placenta and liver suggesting a role in Rab27A-dependent membrane trafficking in specific tissues. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 175995 [Multi-domain] Cd Length: 125 Bit Score: 74.40 E-value: 4.45e-16

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 187 GDLSIAIDYNFPKKALVVTILEARGLPAVEGQTGSADPYVKMTILPEK--KHRVKTRVLRKTLEPAFDETFTfYGVPYSS 264
Cdd:cd04029    2 GEILFSLSYDYKTQSLNVHVKECRNLAYGDEAKKRSNPYVKTYLLPDKsrQSKRKTSIKRNTTNPVYNETLK-YSISHSQ 80

                         90       100
                 ....*....|....*....|....*....
gi 242117955 265 LSDLTLHFLVLSFDRFSRDDVIGEAMVPL 293
Cdd:cd04029   81 LETRTLQLSVWHYDRFGRNTFLGEVEIPL 109

C2 domain first repeat present in Synaptotagmin-like proteins 1 and 2; All Slp members basically share an N-terminal Slp homology domain (SHD) and C-terminal tandem C2 domains (named the C2A domain and the C2B domain) with the SHD and C2 domains being separated by a linker sequence of various length. Slp1/JFC1 and Slp2/exophilin 4 promote granule docking to the plasma membrane. Additionally, their C2A domains are both Ca2+ independent, unlike Slp3 and Slp4/granuphilin which are Ca2+ dependent. It is thought that SHD (except for the Slp4-SHD) functions as a specific Rab27A/B-binding domain. In addition to Slps, rabphilin, Noc2, and Munc13-4 also function as Rab27-binding proteins. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176039 [Multi-domain] Cd Length: 125 Bit Score: 74.01 E-value: 5.18e-16

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 186 RGDLSIAIDYNFPKKALVVTILEARGLPAVEGQTGSADPYVKMTILPEKKHRV--KTRVLRKTLEPAFDETFTfYGVPYS 263
Cdd:cd08393    1 QGSVQFALDYDPKLRELHVHVIQCQDLAAADPKKQRSDPYVKTYLLPDKSNRGkrKTSVKKKTLNPVFNETLR-YKVERE 79

                         90       100       110
                 ....*....|....*....|....*....|....
gi 242117955 264 SLSDLTLHFLVLSFDRFSRDDVIGEAMVPLAGVD 297
Cdd:cd08393   80 ELPTRVLNLSVWHRDSLGRNSFLGEVEVDLGSWD 113

C2 domain second repeat present in Rabphilin and Double C2 domain; Rabphilin is found neurons and in neuroendrocrine cells, while Doc2 is found not only in the brain but in tissues, including mast cells, chromaffin cells, and osteoblasts. Rabphilin and Doc2s share highly homologous tandem C2 domains, although their N-terminal structures are completely different: rabphilin contains an N-terminal Rab-binding domain (RBD),7 whereas Doc2 contains an N-terminal Munc13-1-interacting domain (MID). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176030 [Multi-domain] Cd Length: 133 Bit Score: 73.92 E-value: 8.67e-16

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 191 IAIDYNFPKKALVVTILEARGLPAVEGqTGSADPYVKMTILPE--KKHRVKTRVLRKTLEPAFDETFtFYGVPYSSLSDL 268
Cdd:cd08384    4 VSLMYNTQRRGLIVGIIRCVNLAAMDA-NGYSDPFVKLYLKPDagKKSKHKTQVKKKTLNPEFNEEF-FYDIKHSDLAKK 81

                         90
                 ....*....|....*....
gi 242117955 269 TLHFLVLSFDRFSRDDVIG 287
Cdd:cd08384   82 TLEITVWDKDIGKSNDYIG 100

C2 domain second repeat present in Synaptotagmin 1; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 1, a member of the class 1 synaptotagmins, is located in the brain and endocranium and localized to the synaptic vesicles and secretory granules. It functions as a Ca2+ sensor for fast exocytosis. It, like synaptotagmin-2, has an N-glycosylated N-terminus. Synaptotagmin 4, a member of class 4 synaptotagmins, is located in the brain. It functions are unknown. It, like synaptotagmin-11, has an Asp to Ser substitution in its C2A domain. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176047 [Multi-domain] Cd Length: 136 Bit Score: 73.20 E-value: 1.57e-15

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 187 GDLSIAIDYNFPKKALVVTILEARGLPAVEgQTGSADPYVKMTILPEKKH--RVKTRVLRKTLEPAFDETFTFyGVPYSS 264
Cdd:cd08402    2 GDICFSLRYVPTAGKLTVVILEAKNLKKMD-VGGLSDPYVKIHLMQNGKRlkKKKTTIKKRTLNPYYNESFSF-EVPFEQ 79

                         90       100
                 ....*....|....*....|....*..
gi 242117955 265 LSDLTLHFLVLSFDRFSRDDVIGEAMV 291
Cdd:cd08402   80 IQKVHLIVTVLDYDRIGKNDPIGKVVL 106

C2 domain first repeat present in Rabphilin and Double C2 domain; Rabphilin is found neurons and in neuroendrocrine cells, while Doc2 is found not only in the brain but in tissues, including mast cells, chromaffin cells, and osteoblasts. Rabphilin and Doc2s share highly homologous tandem C2 domains, although their N-terminal structures are completely different: rabphilin contains an N-terminal Rab-binding domain (RBD),7 whereas Doc2 contains an N-terminal Munc13-1-interacting domain (MID). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176000 [Multi-domain] Cd Length: 123 Bit Score: 72.31 E-value: 1.92e-15

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIY-DVPAEL 398
Cdd:cd04035    2 GTLEFTLLYDPANSALHCTIIRAKGLKAMDANGLS-DPYVKLNLLPGASKATKLRTKTVHKTRNPEFNETLTYyGITEED 80

                         90
                 ....*....|....*
gi 242117955 399 LPDISIEFLVMDFDR 413
Cdd:cd04035   81 IQRKTLRLLVLDEDR 95

C2 domain second repeat found in Tac2-N (Tandem C2 protein in Nucleus); Tac2-N contains two C2 domains and a short C-terminus including a WHXL motif, which are key in stabilizing transport vesicles to the plasma membrane by binding to a plasma membrane. However unlike the usual carboxyl-terminal-type (C-type) tandem C2 proteins, it lacks a transmembrane domain, a Slp-homology domain, and a Munc13-1-interacting domain. Homology search analysis indicate that no known protein motifs are located in its N-terminus, making Tac2-N a novel class of Ca2+-independent, C-type tandem C2 proteins. The C2 domain was first identified in PKC. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176074 Cd Length: 135 Bit Score: 71.50 E-value: 6.00e-15

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 321 ELLVSLSYQPVSHRLSVVVLKAKHLPKlDITGLSANPYVKLNVFYGHKRIAKKKTHVKKCTLNPV-FNESFIYDVpaeLL 399
Cdd:cd08692    2 ELQLGTCFQAVNSRIQLQILEAQNLPS-SSTPLTLSFFVKVGMFSTGGLLYKKKTRLVKSSNGQVkWGETMIFPV---TQ 77

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 242117955 400 PDISIEFLVMDFDRTT--KNQALGRLVLGADSPCPSGAAHWQEVCQNPRRQISKWHTL 455
Cdd:cd08692   78 QEHGIQFLIKLYSRSSvrRKHFLGQVWISSDSSSSEAVEQWKDTIANPEKVVTKWHSL 135

C2A domain first repeat present in Synaptotagmins 4 and 11; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmins 4 and 11, class 4 synaptotagmins, are located in the brain. Their functions are unknown. They are distinguished from the other synaptotagmins by having and Asp to Ser substitution in their C2A domains. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176034 [Multi-domain] Cd Length: 128 Bit Score: 71.23 E-value: 6.70e-15

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSANPYVKLNVFYGHKRiaKKKTHVKKCTLNPVFNESF-IYDVPAEL 398
Cdd:cd08388    3 GTLFFSLRYNSEKKALLVNIIECRDLPAMDEQSGTSDPYVKLQLLPEKEH--KVKTRVLRKTRNPVYDETFtFYGIPYNQ 80

                         90       100
                 ....*....|....*....|....*.
gi 242117955 399 LPDISIEFLVMDFDRTTKNQALGRLV 424
Cdd:cd08388   81 LQDLSLHFAVLSFDRYSRDDVIGEVV 106

C2 domain first repeat contained in Rab3-interacting molecule (RIM) proteins; RIMs are believed to organize specialized sites of the plasma membrane called active zones. They also play a role in controlling neurotransmitter release, plasticity processes, as well as memory and learning. RIM contains an N-terminal zinc finger domain, a PDZ domain, and two C-terminal C2 domains (C2A, C2B). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-I topology and do not bind Ca2+.

Pssm-ID: 175997 [Multi-domain] Cd Length: 125 Bit Score: 70.35 E-value: 1.12e-14

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 319 HGELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIY-DVPAE 397
Cdd:cd04031    2 TGRIQIQLWYDKVTSQLIVTVLQARDLPPRDDGSLR-NPYVKVYLLPDRSEKSKRRTKTVKKTLNPEWNQTFEYsNVRRE 80

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|..
gi 242117955 398 LLPDISIEFLVMDFDRTTKNQALGRLVLG-ADSPCpSGAAHW 438
Cdd:cd04031   81 TLKERTLEVTVWDYDRDGENDFLGEVVIDlADALL-DDEPHW 121

C2 domain first repeat; fungal group; C2 domains were first identified in Protein Kinase C (PKC). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176006 [Multi-domain] Cd Length: 111 Bit Score: 68.83 E-value: 2.51e-14

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPAVEGQTGSADPYVKMTILPEKKHRVKTRVLRKTLEPAFDETFTFYGVPYSSLSDLTLHFLVLSFDRFS 281
Cdd:cd04041    3 LVVTIHRATDLPKADFGTGSSDPYVTASFAKFGKPLYSTRIIRKDLNPVWEETWFVLVTPDEVKAGERLSCRLWDSDRFT 82

                         90
                 ....*....|...
gi 242117955 282 RDDVIGEAMVPLA 294
Cdd:cd04041   83 ADDRLGRVEIDLK 95

C2A domain first repeat present in Synaptotagmin 7; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 7, a member of class 2 synaptotagmins, is located in presynaptic plasma membranes in neurons, dense-core vesicles in endocrine cells, and lysosomes in fibroblasts. It has been shown to play a role in regulation of Ca2+-dependent lysosomal exocytosis in fibroblasts and may also function as a vesicular Ca2+-sensor. It is distinguished from the other synaptotagmins by having over 12 splice forms. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176032 [Multi-domain] Cd Length: 125 Bit Score: 68.90 E-value: 3.20e-14

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRiaKKKTHVKKCTLNPVFNESFIYD-VPAEL 398
Cdd:cd08386    3 GRIQFSVSYDFQESTLTLKILKAVELPAKDFSGTS-DPFVKIYLLPDKKH--KLETKVKRKNLNPHWNETFLFEgFPYEK 79

                         90       100
                 ....*....|....*....|...
gi 242117955 399 LPDISIEFLVMDFDRTTKNQALG 421
Cdd:cd08386   80 LQQRVLYLQVLDYDRFSRNDPIG 102

C2 domain fourth repeat present in Tricalbin-like proteins; 5 to 6 copies of the C2 domain are present in Tricalbin, a yeast homolog of Synaptotagmin, which is involved in membrane trafficking and sorting. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the fifth C2 repeat, C2E, and has a type-II topology.

Pssm-ID: 176005 [Multi-domain] Cd Length: 115 Bit Score: 68.75 E-value: 3.61e-14

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPKLDITGLSaNPYVKLNVfyGHKRIAKkkTHVKKCTLNPVFNESFIYDVPAELLPDISIEflVMDFDRT 414
Cdd:cd04040    1 LTVDVISAENLPSADRNGKS-DPFVKFYL--NGEKVFK--TKTIKKTLNPVWNESFEVPVPSRVRAVLKVE--VYDWDRG 73

                         90
                 ....*....|.
gi 242117955 415 TKNQALGRLVL 425
Cdd:cd04040   74 GKDDLLGSAYI 84

C2 domain second repeat present in class II phosphatidylinositol 3-kinases (PI3Ks); There are 3 classes of PI3Ks based on structure, regulation, and specificity. All classes contain a N-terminal C2 domain, a PIK domain, and a kinase catalytic domain. Unlike class I and class III, class II PI3Ks have additionally a PX domain and a C-terminal C2 domain containing a nuclear localization signal both of which bind phospholipids though in a slightly different fashion. PI3Ks (AKA phosphatidylinositol (PtdIns) 3-kinases) regulate cell processes such as cell growth, differentiation, proliferation, and motility. PI3Ks work on phosphorylation of phosphatidylinositol, phosphatidylinositide (4)P (PtdIns (4)P),2 or PtdIns(4,5)P2. Specifically they phosphorylate the D3 hydroxyl group of phosphoinositol lipids on the inositol ring. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176027 [Multi-domain] Cd Length: 122 Bit Score: 68.09 E-value: 5.95e-14

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 193 IDYNfpKKALVVTILEARGLPAVEGQtgSADPYVKMTILPE--KKHRVKTRVLRKTLEPAFDETFTFYGVPYSSLSDLTL 270
Cdd:cd08381    8 ISYK--NGTLFVMVMHAKNLPLLDGS--DPDPYVKTYLLPDpqKTTKRKTKVVRKTRNPTFNEMLVYDGLPVEDLQQRVL 83

                         90       100       110
                 ....*....|....*....|....*....|....
gi 242117955 271 HFLVLSFDRFSRDDVIGEAMVPLAGVDPSTGRVH 304
Cdd:cd08381   84 QVSVWSHDSLVENEFLGGVCIPLKKLDLSQETEK 117

C2 domain first repeat present in Synaptotagmin-like proteins 4 and 5; All Slp members basically share an N-terminal Slp homology domain (SHD) and C-terminal tandem C2 domains (named the C2A domain and the C2B domain) with the SHD and C2 domains being separated by a linker sequence of various length. SHD of Slp (except for the Slp4-SHD) function as a specific Rab27A/B-binding domain. In addition to Slp, rabphilin, Noc2, and Munc13-4 also function as Rab27-binding proteins. It has been demonstrated that Slp4/granuphilin promotes dense-core vesicle exocytosis. The C2A domain of Slp4 is Ca2+ dependent. Slp5 mRNA has been shown to be restricted to human placenta and liver suggesting a role in Rab27A-dependent membrane trafficking in specific tissues. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 175995 [Multi-domain] Cd Length: 125 Bit Score: 67.85 E-value: 8.64e-14

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSANPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd04029    2 GEILFSLSYDYKTQSLNVHVKECRNLAYGDEAKKRSNPYVKTYLLPDKSRQSKRKTSIKRNTTNPVYNETLKYSISHSQL 81

                         90       100       110
                 ....*....|....*....|....*....|
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRLVLGADS 429
Cdd:cd04029   82 ETRTLQLSVWHYDRFGRNTFLGEVEIPLDS 111

C2 domain first repeat present in Synaptotagmin-like proteins 1 and 2; All Slp members basically share an N-terminal Slp homology domain (SHD) and C-terminal tandem C2 domains (named the C2A domain and the C2B domain) with the SHD and C2 domains being separated by a linker sequence of various length. Slp1/JFC1 and Slp2/exophilin 4 promote granule docking to the plasma membrane. Additionally, their C2A domains are both Ca2+ independent, unlike Slp3 and Slp4/granuphilin which are Ca2+ dependent. It is thought that SHD (except for the Slp4-SHD) functions as a specific Rab27A/B-binding domain. In addition to Slps, rabphilin, Noc2, and Munc13-4 also function as Rab27-binding proteins. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176039 [Multi-domain] Cd Length: 125 Bit Score: 66.69 E-value: 2.50e-13

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSANPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd08393    2 GSVQFALDYDPKLRELHVHVIQCQDLAAADPKKQRSDPYVKTYLLPDKSNRGKRKTSVKKKTLNPVFNETLRYKVEREEL 81

                         90       100
                 ....*....|....*....|....
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRL 423
Cdd:cd08393   82 PTRVLNLSVWHRDSLGRNSFLGEV 105

C2 domain first repeat present in Synaptotagmin-like proteins; All Slp members basically share an N-terminal Slp homology domain (SHD) and C-terminal tandem C2 domains (named the C2A domain and the C2B domain) with the SHD and C2 domains being separated by a linker sequence of various length. Slp1/JFC1 and Slp2/exophilin 4 promote granule docking to the plasma membrane. Additionally, their C2A domains are both Ca2+ independent, unlike the case in Slp3 and Slp4/granuphilin in which their C2A domains are Ca2+ dependent. It is thought that SHD (except for the Slp4-SHD) functions as a specific Rab27A/B-binding domain. In addition to Slps, rabphilin, Noc2, and Munc13-4 also function as Rab27-binding proteins. It has been demonstrated that Slp3 and Slp4/granuphilin promote dense-core vesicle exocytosis. Slp5 mRNA has been shown to be restricted to human placenta and liver suggesting a role in Rab27A-dependent membrane trafficking in specific tissues. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176056 [Multi-domain] Cd Length: 123 Bit Score: 66.12 E-value: 2.97e-13

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSANPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd08521    1 GEIEFSLSYNYKTGSLEVHIKECRNLAYADEKKKRSNPYVKVYLLPDKSKQSKRKTSVKKNTTNPVFNETLKYHISKSQL 80

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 242117955 400 PDISIEFLVMDFDRTTKNQALGRLVLGADSpcpsgaahWqevcqNPRRQISKWHTL 455
Cdd:cd08521   81 ETRTLQLSVWHHDRFGRNTFLGEVEIPLDS--------W-----DLDSQQSEWYPL 123

C2 domain fourth repeat present in Tricalbin-like proteins; 5 to 6 copies of the C2 domain are present in Tricalbin, a yeast homolog of Synaptotagmin, which is involved in membrane trafficking and sorting. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the fifth C2 repeat, C2E, and has a type-II topology.

Pssm-ID: 176005 [Multi-domain] Cd Length: 115 Bit Score: 64.13 E-value: 1.51e-12

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPAVEgQTGSADPYVKMTIlpEKKHRVKTRVLRKTLEPAFDETFTfygVPYSSLSDLTLHFLVLSFDRFS 281
Cdd:cd04040    1 LTVDVISAENLPSAD-RNGKSDPFVKFYL--NGEKVFKTKTIKKTLNPVWNESFE---VPVPSRVRAVLKVEVYDWDRGG 74

                         90
                 ....*....|....*..
gi 242117955 282 RDDVIGEAMVPLAGVDP 298
Cdd:cd04040   75 KDDLLGSAYIDLSDLEP 91

C2 domain first repeat present in Synaptotagmin-like protein 3; All Slp members basically share an N-terminal Slp homology domain (SHD) and C-terminal tandem C2 domains (named the C2A domain and the C2B domain) with the SHD and C2 domains being separated by a linker sequence of various length. SHD of Slp (except for the Slp4-SHD) function as a specific Rab27A/B-binding domain. In addition to Slp, rabphilin, Noc2, and Munc13-4 also function as Rab27-binding proteins. Little is known about the expression or localization of Slp3. The C2A domain of Slp3 is Ca2+ dependent. It has been demonstrated that Slp3 promotes dense-core vesicle exocytosis. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176038 [Multi-domain] Cd Length: 128 Bit Score: 61.77 E-value: 1.24e-11

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 187 GDLSIAIDYNFPKKALVVTILEARGLPAVEGQTGSADPYVKMTILPEKKH--RVKTRVLRKTLEPAFDETFTfYGVPYSS 264
Cdd:cd08392    2 GEIEFALHYNFRTSCLEITIKACRNLAYGDEKKKKCHPYVKVCLLPDKSHnsKRKTAVKKGTVNPVFNETLK-YVVEADL 80

                         90       100       110
                 ....*....|....*....|....*....|...
gi 242117955 265 LSDLTLHFLVLSFDRFSRDDVIGEAMVPLAGVD 297
Cdd:cd08392   81 LSSRQLQVSVWHSRTLKRRVFLGEVLIPLADWD 113

C2 domain first repeat present in Tricalbin-like proteins; 5 to 6 copies of the C2 domain are present in Tricalbin, a yeast homolog of Synaptotagmin, which is involved in membrane trafficking and sorting. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-II topology.

Pssm-ID: 176009 [Multi-domain] Cd Length: 124 Bit Score: 59.49 E-value: 6.91e-11

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 201 ALVVTILEARGLPAVEGQTGSADPYVKMTILPEKKHrVKTRVLRKTLEPAFDETFTfygVPYSSLSDlTLHFLVLSFDRF 280
Cdd:cd04044    3 VLAVTIKSARGLKGSDIIGGTVDPYVTFSISNRREL-ARTKVKKDTSNPVWNETKY---ILVNSLTE-PLNLTVYDFNDK 77

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|
gi 242117955 281 SRDDVIGEAMVPLAGVDPSTGRVHITQQITKRNmqcVSHGELLVSLSYQP 330
Cdd:cd04044   78 RKDKLIGTAEFDLSSLLQNPEQENLTKNLLRNG---KPVGELNYDLRFFP 124

C2 domain found in the Human KIAA0528 cDNA clone; The members of this CD are named after the Human KIAA0528 cDNA clone. All members here contain a single C2 repeat. No other information on this protein is currently known. The C2 domain was first identified in PKC. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176070 [Multi-domain] Cd Length: 110 Bit Score: 58.09 E-value: 1.75e-10

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPKLDITGLSANPYVKLnvfyghkRIAKK--KTHVKKCTLNPVFN-ESFIYDVPAELLPDISIEFLVMDF 411
Cdd:cd08688    1 LKVRVVAARDLPVMDRSSDLTDAFVEV-------KFGSTtyKTDVVKKSLNPVWNsEWFRFEVDDEELQDEPLQIRVMDH 73

                         90       100       110
                 ....*....|....*....|....*....|.
gi 242117955 412 DRTTKNQALGR-------LVLGADSPCPSGA 435
Cdd:cd08688   74 DTYSANDAIGKvyidlnpLLLKDSVSQISGW 104

C2 domain first repeat present in Synaptotagmin-like proteins; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 175990 [Multi-domain] Cd Length: 128 Bit Score: 58.59 E-value: 1.83e-10

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 201 ALVVTILEARGLPAVE-GQTGSADPYVkmtILPEKKHRVKTRVLRKTLEPAFDETFTFygvPYSSLSDLTLHFLVLSFDR 279
Cdd:cd04024    2 VLRVHVVEAKDLAAKDrSGKGKSDPYA---ILSVGAQRFKTQTIPNTLNPKWNYWCEF---PIFSAQNQLLKLILWDKDR 75

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|..
gi 242117955 280 FSRDDVIGEAMVPLAGV--DPSTGRVH--ITQQITKRNMQCVSHGELLVSLS 327
Cdd:cd04024   76 FAGKDYLGEFDIALEEVfaDGKTGQSDkwITLKSTRPGKTSVVSGEIHLQFS 127

C2 domain second repeat of Ras GTPase activating proteins (GAPs); RasGAPs suppress Ras function by enhancing the GTPase activity of Ras proteins resulting in the inactive GDP-bound form of Ras. In this way it can control cellular proliferation and differentiation. The proteins here all contain two tandem C2 domains, a Ras-GAP domain, and a pleckstrin homology (PH)-like domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-I topology.

Pssm-ID: 176057 [Multi-domain] Cd Length: 137 Bit Score: 58.15 E-value: 3.19e-10

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPAVEGqtGSADPYVKMTILPEKKHRVK-TRVLRKTLEPAFDETFTF-------YGVPYSSLSDLTLHFL 273
Cdd:cd08675    1 LSVRVLECRDLALKSN--GTCDPFARVTLNYSSKTDTKrTKVKKKTNNPRFDEAFYFeltigfsYEKKSFKVEEEDLEKS 78

                         90       100
                 ....*....|....*....|....*....
gi 242117955 274 VLSFDRF-----SRDDVIGEAMVPLAGVD 297
Cdd:cd08675   79 ELRVELWhasmvSGDDFLGEVRIPLQGLQ 107

C2 domain of the Regulator Of G-Protein Signaling (RGS) family; This CD contains members of the regulator of G-protein signaling (RGS) family. RGS is a GTPase activating protein which inhibits G-protein mediated signal transduction. The protein is largely cytosolic, but G-protein activation leads to translocation of this protein to the plasma membrane. A nuclear form of this protein has also been described, but its sequence has not been identified. There are multiple alternatively spliced transcript variants in this family with some members having additional domains (ex. PDZ and RGS) downstream of the C2 domain. The C2 domain was first identified in PKC. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176067 [Multi-domain] Cd Length: 119 Bit Score: 57.08 E-value: 4.30e-10

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 242117955 187 GDLSIAIDYNfpKKALVVTILEARGLPavEGQTGSADPYVKMTILPEKKHRV--KTRVLRKTLEPAFDETFTF 257
Cdd:cd08685    1 GQLKLSIEGQ--NRKLTLHVLEAKGLR--STNSGTCNSYVKISLSPDKEVRFrqKTSTVPDSANPLFHETFSF 69

C2 domain found in the Human KIAA0528 cDNA clone; The members of this CD are named after the Human KIAA0528 cDNA clone. All members here contain a single C2 repeat. No other information on this protein is currently known. The C2 domain was first identified in PKC. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176070 [Multi-domain] Cd Length: 110 Bit Score: 56.55 E-value: 4.99e-10

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPAVEGQTGSADPYVKMTILpekKHRVKTRVLRKTLEPAF-DETFTFyGVPYSSLSDLTLHFLVLSFDRF 280
Cdd:cd08688    1 LKVRVVAARDLPVMDRSSDLTDAFVEVKFG---STTYKTDVVKKSLNPVWnSEWFRF-EVDDEELQDEPLQIRVMDHDTY 76

                         90
                 ....*....|...
gi 242117955 281 SRDDVIGEAMVPL 293
Cdd:cd08688   77 SANDAIGKVYIDL 89

C2 domain fifth repeat in Ferlin; Ferlins are involved in vesicle fusion events. Ferlins and other proteins, such as Synaptotagmins, are implicated in facilitating the fusion process when cell membranes fuse together. There are six known human Ferlins: Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin (Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these genes can lead to a wide range of diseases including muscular dystrophy (dysferlin), deafness (otoferlin), and infertility (fer-1, fertilization factor-1). Structurally they have 6 tandem C2 domains, designated as (C2A-C2F) and a single C-terminal transmembrane domain, though there is a new study that disputes this and claims that there are actually 7 tandem C2 domains with another C2 domain inserted between C2D and C2E. In a subset of them (Dysferlin, Myoferlin, and Fer1) there is an additional conserved domain called DysF. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the fifth C2 repeat, C2E, and has a type-II topology.

Pssm-ID: 176002 [Multi-domain] Cd Length: 124 Bit Score: 56.40 E-value: 8.79e-10

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 337 VVVLKAKHLPKLDITGLSaNPYVKLNVfyGHKRIAKKKTHVKKcTLNPVFNESFIYD--VPAELLPDISieflVMDFDRT 414
Cdd:cd04037    4 VYVVRARNLQPKDPNGKS-DPYLKIKL--GKKKINDRDNYIPN-TLNPVFGKMFELEatLPGNSILKIS----VMDYDLL 75


                 ....*...
gi 242117955 415 TKNQALGR 422
Cdd:cd04037   76 GSDDLIGE 83

C2 domain second repeat present in class II phosphatidylinositol 3-kinases (PI3Ks); There are 3 classes of PI3Ks based on structure, regulation, and specificity. All classes contain a N-terminal C2 domain, a PIK domain, and a kinase catalytic domain. Unlike class I and class III, class II PI3Ks have additionally a PX domain and a C-terminal C2 domain containing a nuclear localization signal both of which bind phospholipids though in a slightly different fashion. PI3Ks (AKA phosphatidylinositol (PtdIns) 3-kinases) regulate cell processes such as cell growth, differentiation, proliferation, and motility. PI3Ks work on phosphorylation of phosphatidylinositol, phosphatidylinositide (4)P (PtdIns (4)P),2 or PtdIns(4,5)P2. Specifically they phosphorylate the D3 hydroxyl group of phosphoinositol lipids on the inositol ring. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176027 [Multi-domain] Cd Length: 122 Bit Score: 56.15 E-value: 1.04e-09

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVShrLSVVVLKAKHLPKLDitGLSANPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYD-VPAEL 398
Cdd:cd08381    2 GQVKLSISYKNGT--LFVMVMHAKNLPLLD--GSDPDPYVKTYLLPDPQKTTKRKTKVVRKTRNPTFNEMLVYDgLPVED 77

                         90       100
                 ....*....|....*....|....*..
gi 242117955 399 LPDISIEFLVMDFDRTTKNQALGRLVL 425
Cdd:cd08381   78 LQQRVLQVSVWSHDSLVENEFLGGVCI 104

Ca2+-dependent lipid-binding protein, contains C2 domain [General function prediction only];

Pssm-ID: 227371 [Multi-domain] Cd Length: 1227 Bit Score: 59.77 E-value: 2.47e-09

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955  322 LLVSLSYQPVSHR------------LSVVVLKAKHLPKLDITGLSaNPYVKLnvFYGHKRIAKKKtHVKKcTLNPVFNES 389
Cdd:COG5038  1017 VLVQVSYTPVPVKlppvemvensgyLTIMLRSGENLPSSDENGYS-DPFVKL--FLNEKSVYKTK-VVKK-TLNPVWNEE 1091

                          90       100       110
                  ....*....|....*....|....*....|..
gi 242117955  390 FIYDVPAELLpDIsIEFLVMDFDRTTKNQALG 421
Cdd:COG5038  1092 FTIEVLNRVK-DV-LTINVNDWDSGEKNDLLG 1121

C2 domain present in the Human neural precursor cell-expressed, developmentally down-regulated 4 (NEDD4) and NEDD4-like (NEDD4L/NEDD42); Nedd4 and Nedd4-2 are two of the nine members of the Human Nedd4 family. All vertebrates appear to have both Nedd4 and Nedd4-2 genes. They are thought to participate in the regulation of epithelial Na+ channel (ENaC) activity. They also have identical specificity for ubiquitin conjugating enzymes (E2). Nedd4 and Nedd4-2 are composed of a C2 domain, 2-4 WW domains, and a ubiquitin ligase Hect domain. Their WW domains can bind PPxY (PY) or LPSY motifs, and in vitro studies suggest that WW3 and WW4 of both proteins bind PY motifs in the key substrates, with WW3 generally exhibiting higher affinity. Most Nedd4 family members, especially Nedd4-2, also have multiple splice variants, which might play different roles in regulating their substrates. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 175999 [Multi-domain] Cd Length: 133 Bit Score: 55.05 E-value: 3.01e-09

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPKLDITGLSaNPYVKLNVF--YGHKRIAKKKTHVKKCTLNPVFNESFIYDV-PAE--LLpdisieFLVM 409
Cdd:cd04033    2 LRVKVLAGIDLAKKDIFGAS-DPYVKISLYdpDGNGEIDSVQTKTIKKTLNPKWNEEFFFRVnPREhrLL------FEVF 74

                         90
                 ....*....|..
gi 242117955 410 DFDRTTKNQALG 421
Cdd:cd04033   75 DENRLTRDDFLG 86

C2 domain second repeat present in Synaptotagmin 17; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 17 is located in the brain, kidney, and prostate and is thought to be a peripheral membrane protein. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176055 [Multi-domain] Cd Length: 135 Bit Score: 54.90 E-value: 3.35e-09

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 187 GDLSIAIDYNFPKKALVVTILEARGLPAVEGQTGSaDPYVKMTILPEKK--HRVKTRVLRKTLEPAFDETFTFYgVPYSS 264
Cdd:cd08410    1 GELLLSLNYLPSAGRLNVDIIRAKQLLQTDMSQGS-DPFVKIQLVHGLKliKTKKTSCMRGTIDPFYNESFSFK-VPQEE 78

                         90       100
                 ....*....|....*....|....*..
gi 242117955 265 LSDLTLHFLVLSFDRFSRDDVIGEAMV 291
Cdd:cd08410   79 LENVSLVFTVYGHNVKSSNDFIGRIVI 105

C2 domain first repeat in Ferlin; Ferlins are involved in vesicle fusion events. Ferlins and other proteins, such as Synaptotagmins, are implicated in facilitating the fusion process when cell membranes fuse together. There are six known human Ferlins: Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin (Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these genes can lead to a wide range of diseases including muscular dystrophy (dysferlin), deafness (otoferlin), and infertility (fer-1, fertilization factor-1). Structurally they have 6 tandem C2 domains, designated as (C2A-C2F) and a single C-terminal transmembrane domain, though there is a new study that disputes this and claims that there are actually 7 tandem C2 domains with another C2 domain inserted between C2D and C2E. In a subset of them (Dysferlin, Myoferlin, and Fer1) there is an additional conserved domain called DysF. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-II topology.

Pssm-ID: 176019 [Multi-domain] Cd Length: 127 Bit Score: 54.57 E-value: 3.40e-09

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 338 VVLKAKHLPKLdiTGLSAnPYVKLNvFYGHKriakKKTHVKKCTLNPVFNESFIYDVPAELLPDISIEFLVMDFDRTTKN 417
Cdd:cd08373    1 LVVSLKNLPGL--KGKGD-RIAKVT-FRGVK----KKTRVLENELNPVWNETFEWPLAGSPDPDESLEIVVKDYEKVGRN 72


                 ....*...
gi 242117955 418 QALGRLVL 425
Cdd:cd08373   73 RLIGSATV 80

C2 domain second repeat in Ferlin; Ferlins are involved in vesicle fusion events. Ferlins and other proteins, such as Synaptotagmins, are implicated in facilitating the fusion process when cell membranes fuse together. There are six known human Ferlins: Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin (Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these genes can lead to a wide range of diseases including muscular dystrophy (dysferlin), deafness (otoferlin), and infertility (fer-1, fertilization factor-1). Structurally they have 6 tandem C2 domains, designated as (C2A-C2F) and a single C-terminal transmembrane domain, though there is a new study that disputes this and claims that there are actually 7 tandem C2 domains with another C2 domain inserted between C2D and C2E. In a subset of them (Dysferlin, Myoferlin, and Fer1) there is an additional conserved domain called DysF. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-II topology.

Pssm-ID: 175978 [Multi-domain] Cd Length: 111 Bit Score: 54.12 E-value: 4.27e-09

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 204 VTILEARGLPavegqTGSADPYVKMTILPEKKHrvkTRVLRKTLEPAFDETFTF-YGVPYSSLSDLTLHFLVLSFDRFSR 282
Cdd:cd04011    8 VRVIEARQLV-----GGNIDPVVKVEVGGQKKY---TSVKKGTNCPFYNEYFFFnFHESPDELFDKIIKISVYDSRSLRS 79


                 ....*.
gi 242117955 283 DDVIGE 288
Cdd:cd04011   80 DTLIGS 85

C2 domain present in Arf GTPase Activating Proteins (GAP); ArfGAP is a GTPase activating protein which regulates the ADP ribosylation factor Arf, a member of the Ras superfamily of GTP-binding proteins. The GTP-bound form of Arf is involved in Golgi morphology and is involved in recruiting coat proteins. ArfGAP is responsible for the GDP-bound form of Arf which is necessary for uncoating the membrane and allowing the Golgi to fuse with an acceptor compartment. These proteins contain an N-terminal ArfGAP domain containing the characteristic zinc finger motif (Cys-x2-Cys-x(16,17)-x2-Cys) and C-terminal C2 domain. C2 domains were first identified in Protein Kinase C (PKC). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176003 [Multi-domain] Cd Length: 145 Bit Score: 54.25 E-value: 6.47e-09

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 242117955 220 GSADPYVKMTILPEKkhrVKTRVLRKTLEPAFDETFTFygvpysSLSDLT--LHFLVLSFDRFSRDDVIGEAMVPL 293
Cdd:cd04038   20 TSSDPYVVLTLGNQK---VKTRVIKKNLNPVWNEELTL------SVPNPMapLKLEVFDKDTFSKDDSMGEAEIDL 86

C2 domain first repeat found in Multiple C2 domain and Transmembrane region Proteins (MCTP); MCTPs are involved in Ca2+ signaling at the membrane. MCTP is composed of a variable N-terminal sequence, three C2 domains, two transmembrane regions (TMRs), and a short C-terminal sequence. It is one of four protein classes that are anchored to membranes via a transmembrane region; the others being synaptotagmins, extended synaptotagmins, and ferlins. MCTPs are the only membrane-bound C2 domain proteins that contain two functional TMRs. MCTPs are unique in that they bind Ca2+ but not phospholipids. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-II topology.

Pssm-ID: 176007 [Multi-domain] Cd Length: 121 Bit Score: 52.66 E-value: 1.55e-08

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLpAVEGQTGSADPYVKMTIlpEKKHRVKTRVLRKTLEPAFDETFTfygVPYSSLSDlTLHFLVLSFDRFS 281
Cdd:cd04042    2 LDIHLKEGRNL-AARDRGGTSDPYVKFKY--GGKTVYKSKTIYKNLNPVWDEKFT---LPIEDVTQ-PLYIKVFDYDRGL 74

                         90
                 ....*....|...
gi 242117955 282 RDDVIGEAMVPLA 294
Cdd:cd04042   75 TDDFMGSAFVDLS 87

C2A domain first repeat present in Synaptotagmins 14 and 16; Synaptotagmin 14 and 16 are membrane-trafficking proteins in specific tissues outside the brain. Both of these contain C-terminal tandem C2 repeats, but only Synaptotagmin 14 has an N-terminal transmembrane domain and a putative fatty-acylation site. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium and this is indeed the case here. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176035 [Multi-domain] Cd Length: 124 Bit Score: 52.24 E-value: 2.29e-08

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSANPyVKLnVFYGHKRiAKKKTHVKKCTlNPVFNESFIYD-VPAEL 398
Cdd:cd08389    3 GDLDVAFEYDPSARKLTVTVIRAQDIPTKDRGGASSWQ-VHL-VLLPSKK-QRAKTKVQRGP-NPVFNETFTFSrVEPEE 78

                         90       100
                 ....*....|....*....|....*..
gi 242117955 399 LPDISIEFLVMDFDRTTKNQALGRLVL 425
Cdd:cd08389   79 LNNMALRFRLYGVERMRKERLIGEKVV 105

C2 domain present in the Human neural precursor cell-expressed, developmentally down-regulated 4 (NEDD4) and NEDD4-like (NEDD4L/NEDD42); Nedd4 and Nedd4-2 are two of the nine members of the Human Nedd4 family. All vertebrates appear to have both Nedd4 and Nedd4-2 genes. They are thought to participate in the regulation of epithelial Na+ channel (ENaC) activity. They also have identical specificity for ubiquitin conjugating enzymes (E2). Nedd4 and Nedd4-2 are composed of a C2 domain, 2-4 WW domains, and a ubiquitin ligase Hect domain. Their WW domains can bind PPxY (PY) or LPSY motifs, and in vitro studies suggest that WW3 and WW4 of both proteins bind PY motifs in the key substrates, with WW3 generally exhibiting higher affinity. Most Nedd4 family members, especially Nedd4-2, also have multiple splice variants, which might play different roles in regulating their substrates. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 175999 [Multi-domain] Cd Length: 133 Bit Score: 52.36 E-value: 3.12e-08

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 220 GSADPYVKMTILPEKKHR----VKTRVLRKTLEPAFDETFTFYGVPysslSDLTLHFLVLSFDRFSRDDVIGEAMVPLAG 295
Cdd:cd04033   19 GASDPYVKISLYDPDGNGeidsVQTKTIKKTLNPKWNEEFFFRVNP----REHRLLFEVFDENRLTRDDFLGQVEVPLNN 94

                         90       100       110
                 ....*....|....*....|....*....|....*...
gi 242117955 296 VDPSTGRVHITQQITKRNMQCVSH-----GELLVSLSY 328
Cdd:cd04033   95 LPTETPGNERRYTFKDYLLRPRSSksrvkGHLRLYMAY 132

C2 domain first repeat present in Synaptotagmin-like protein 3; All Slp members basically share an N-terminal Slp homology domain (SHD) and C-terminal tandem C2 domains (named the C2A domain and the C2B domain) with the SHD and C2 domains being separated by a linker sequence of various length. SHD of Slp (except for the Slp4-SHD) function as a specific Rab27A/B-binding domain. In addition to Slp, rabphilin, Noc2, and Munc13-4 also function as Rab27-binding proteins. Little is known about the expression or localization of Slp3. The C2A domain of Slp3 is Ca2+ dependent. It has been demonstrated that Slp3 promotes dense-core vesicle exocytosis. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176038 [Multi-domain] Cd Length: 128 Bit Score: 51.37 E-value: 5.46e-08

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQPVSHRLSVVVLKAKHLPKLDITGLSANPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAELL 399
Cdd:cd08392    2 GEIEFALHYNFRTSCLEITIKACRNLAYGDEKKKKCHPYVKVCLLPDKSHNSKRKTAVKKGTVNPVFNETLKYVVEADLL 81

C2 domain first repeat in Ferlin; Ferlins are involved in vesicle fusion events. Ferlins and other proteins, such as Synaptotagmins, are implicated in facilitating the fusion process when cell membranes fuse together. There are six known human Ferlins: Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin (Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these genes can lead to a wide range of diseases including muscular dystrophy (dysferlin), deafness (otoferlin), and infertility (fer-1, fertilization factor-1). Structurally they have 6 tandem C2 domains, designated as (C2A-C2F) and a single C-terminal transmembrane domain, though there is a new study that disputes this and claims that there are actually 7 tandem C2 domains with another C2 domain inserted between C2D and C2E. In a subset of them (Dysferlin, Myoferlin, and Fer1) there is an additional conserved domain called DysF. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-II topology.

Pssm-ID: 176019 [Multi-domain] Cd Length: 127 Bit Score: 50.71 E-value: 8.69e-08

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 205 TILEARGLPaveGQTGSADPYVKMTILPEKKhrvKTRVLRKTLEPAFDETFTF--YGVPYSSLSdltLHFLVLSFDRFSR 282
Cdd:cd08373    1 LVVSLKNLP---GLKGKGDRIAKVTFRGVKK---KTRVLENELNPVWNETFEWplAGSPDPDES---LEIVVKDYEKVGR 71

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*...
gi 242117955 283 DDVIGEAMVPLAGVdPSTGRVHITQQITKRNMQcVSHGELLVSLSYQP 330
Cdd:cd08373   72 NRLIGSATVSLQDL-VSEGLLEVTEPLLDSNGR-PTGATISLEVSYQP 117

C2 domain present in E3 ubiquitin ligase; E3 ubiquitin ligase is part of the ubiquitylation mechanism responsible for controlling surface expression of membrane proteins. The sequential action of several enzymes are involved: ubiquitin-activating enzyme E1, ubiquitin-conjugating enzyme E2, and ubiquitin-protein ligase E3 which is responsible for substrate recognition and promoting the transfer of ubiquitin to the target protein. E3 ubiquitin ligase is composed of an N-terminal C2 domain, 4 WW domains, and a HECTc domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 175988 [Multi-domain] Cd Length: 125 Bit Score: 50.35 E-value: 1.05e-07

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARglPAVEGQTGSADPYVKMTIlpEKKHRVKTRVLRKTLEPAFDETFTFYGVPYSslsdlTLHFLVLSFDRFS 281
Cdd:cd04021    4 LQITVESAK--LKSNSKSFKPDPYVEVTV--DGQPPKKTEVSKKTSNPKWNEHFTVLVTPQS-----TLEFKVWSHHTLK 74

                         90
                 ....*....|..
gi 242117955 282 RDDVIGEAMVPL 293
Cdd:cd04021   75 ADVLLGEASLDL 86

C2 domain second repeat present in RAS p21 protein activator 3 (RasA3); RasA3 are members of GTPase activating protein 1 (GAP1), a Ras-specific GAP, which suppresses Ras function by enhancing the GTPase activity of Ras proteins resulting in the inactive GDP-bound form of Ras. In this way it can control cellular proliferation and differentiation. RasA3 contains an N-terminal C2 domain, a Ras-GAP domain, a plextrin homology (PH)-like domain, and a Bruton's Tyrosine Kinase (BTK) zinc binding domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 175977 [Multi-domain] Cd Length: 148 Bit Score: 50.86 E-value: 1.10e-07

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 242117955 334 RLSVVVLKAKHLPkldITGLSANPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVP 395
Cdd:cd04010    1 KLSVRVIECSDLA---LKNGTCDPYASVTLIYSNKKQDTKRTKVKKKTNNPQFDEAFYFDVT 59

C2 domain present in Phosphatidylserine decarboxylase (PSD); PSD is involved in the biosynthesis of aminophospholipid by converting phosphatidylserine (PtdSer) to phosphatidylethanolamine (PtdEtn). There is a single C2 domain present and it is thought to confer PtdSer binding motif that is common to PKC and synaptotagmin. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176004 [Multi-domain] Cd Length: 108 Bit Score: 49.56 E-value: 1.67e-07

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPAVEGQTGSA---DPYVKMTIlpekKHRV-KTRVLRKTLEPAFDETFTFYGVPYSSLSDltLHFLVLSF 277
Cdd:cd04039    3 VFMEIKSITDLPPLKNMTRTGfdmDPFVIISF----GRRVfRTSWRRHTLNPVFNERLAFEVYPHEKNFD--IQFKVLDK 76

                         90
                 ....*....|....*.
gi 242117955 278 DRFSRDDVIGEAMVPL 293
Cdd:cd04039   77 DKFSFNDYVATGSLSV 92

C2 domain present in Intersectin; A single instance of the C2 domain is located C terminally in the intersectin protein. Intersectin functions as a scaffolding protein, providing a link between the actin cytoskeleton and the components of endocytosis and plays a role in signal transduction. In addition to C2, intersectin contains several additional domains including: Eps15 homology domains, SH3 domains, a RhoGEF domain, and a PH domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. The members here have topology I.

Pssm-ID: 176021 [Multi-domain] Cd Length: 136 Bit Score: 50.08 E-value: 1.95e-07

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPAVEgQTGSADPYVKMTiLPEKKHrvKTRVLRKTLEPAFDETFTFYgvpyssLSDLTLHFLVLS-FDR- 279
Cdd:cd08375   17 LMVVIVEGRDLKPCN-SNGKSDPYCEVS-MGSQEH--KTKVVSDTLNPKWNSSMQFF------VKDLEQDVLCITvFDRd 86

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|...
gi 242117955 280 -FSRDDVIGEAMVPLAGV--DPSTGRVHITQQITKRNmqcVSHGELLVSLSYQ 329
Cdd:cd08375   87 fFSPDDFLGRTEIRVADIlkETKESKGPITKRLLLHE---VPTGEVVVKLDLQ 136

Ca2+-dependent lipid-binding protein, contains C2 domain [General function prediction only];

Pssm-ID: 227371 [Multi-domain] Cd Length: 1227 Bit Score: 53.22 E-value: 2.53e-07

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955  201 ALVVTILEARGLPAVEGQ-TGSADPYVKMTIlpEKKHRVKTRVLRKTLEPAFDEtfTFYgVPYSSLSD-LTLHflVLSFD 278
Cdd:COG5038   437 VVEVKIKSAEGLKKSDSTiNGTVDPYITVTF--SDRVIGKTRVKKNTLNPVWNE--TFY-ILLNSFTDpLNLS--LYDFN 509

                          90       100       110       120       130
                  ....*....|....*....|....*....|....*....|....*....|...
gi 242117955  279 RFSRDDVIGEAMVPLAGVDPSTGRVHITQQItKRNMQCVshGELLVSLSYQPV 331
Cdd:COG5038   510 SFKSDKVVGSTQLDLALLHQNPVKKNELYEF-LRNTKNV--GRLTYDLRFFPV 559

C2 domain present in Phosphoinositide-specific phospholipases C (PLC); PLCs are involved in the hydrolysis of phosphatidylinositol-4,5-bisphosphate (PIP2) to d-myo-inositol-1,4,5-trisphosphate (1,4,5-IP3) and sn-1,2-diacylglycerol (DAG). 1,4,5-IP3 and DAG are second messengers in eukaryotic signal transduction cascades. PLC is composed of a N-terminal PH domain followed by a series of EF hands, a catalytic TIM barrel and a C-terminal C2 domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-II topology.

Pssm-ID: 175974 [Multi-domain] Cd Length: 128 Bit Score: 49.08 E-value: 3.15e-07

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 334 RLSVVVLKAKHLPKL-DITGLSANPYVKLNVFyGHKRI--AKKKTH-VKKCTLNPVFNESFIYDVpaeLLPDIS-IEFLV 408
Cdd:cd00275    3 TLTIKIISGQQLPKPkGDKGSIVDPYVEVEIH-GLPADdsAKFKTKvVKNNGFNPVWNETFEFDV---TVPELAfLRFVV 78


                 ....*.
gi 242117955 409 MDFDRT 414
Cdd:cd00275   79 YDEDSG 84

C2 domain fourth repeat in Ferlin; Ferlins are involved in vesicle fusion events. Ferlins and other proteins, such as Synaptotagmins, are implicated in facilitating the fusion process when cell membranes fuse together. There are six known human Ferlins: Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin (Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these genes can lead to a wide range of diseases including muscular dystrophy (dysferlin), deafness (otoferlin), and infertility (fer-1, fertilization factor-1). Structurally they have 6 tandem C2 domains, designated as (C2A-C2F) and a single C-terminal transmembrane domain, though there is a new study that disputes this and claims that there are actually 7 tandem C2 domains with another C2 domain inserted between C2D and C2E. In a subset of them (Dysferlin, Myoferlin, and Fer1) there is an additional conserved domain called DysF. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the fourth C2 repeat, C2D, and has a type-II topology.

Pssm-ID: 175984 [Multi-domain] Cd Length: 135 Bit Score: 48.69 E-value: 4.62e-07

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 334 RLSVVVLKAKHLPKLDITGLSaNPYVKlnVFYGHKriaKKKTHVKKCTLNP------VFNESFIYDVPAELL---PDISI 404
Cdd:cd04017    2 QLRAYIYQARDLLAADKSGLS-DPFAR--VSFLNQ---SQETEVIKETLSPtwdqtlIFDEVELYGSPEEIAqnpPLVVV 75

                         90       100
                 ....*....|....*....|
gi 242117955 405 EflVMDFDRTTKNQALGRLV 424
Cdd:cd04017   76 E--LFDQDSVGKDEFLGRSV 93

C2 domain present in Soybean genes Regulated by Cold 2 (SRC2)-like proteins; SRC2 production is a response to pathogen infiltration. The initial response of increased Ca2+ concentrations are coupled to downstream signal transduction pathways via calcium binding proteins. SRC2 contains a single C2 domain which localizes to the plasma membrane and is involved in Ca2+ dependent protein binding. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176016 [Multi-domain] Cd Length: 125 Bit Score: 48.38 E-value: 5.63e-07

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 201 ALVVTILEARGLPAVEGqTGSADPYVKMTILPekKHRVKTRVLRK--TlEPAFDETFTFYgVPYSSLSD--LTLHFLVLS 276
Cdd:cd04051    1 TLEITIISAEDLKNVNL-FGKMKVYAVVWIDP--SHKQSTPVDRDggT-NPTWNETLRFP-LDERLLQQgrLALTIEVYC 75

                         90
                 ....*....|....*...
gi 242117955 277 FDRFSRDDVIGEAMVPLA 294
Cdd:cd04051   76 ERPSLGDKLIGEVRVPLK 93

C2 domain present in Arf GTPase Activating Proteins (GAP); ArfGAP is a GTPase activating protein which regulates the ADP ribosylation factor Arf, a member of the Ras superfamily of GTP-binding proteins. The GTP-bound form of Arf is involved in Golgi morphology and is involved in recruiting coat proteins. ArfGAP is responsible for the GDP-bound form of Arf which is necessary for uncoating the membrane and allowing the Golgi to fuse with an acceptor compartment. These proteins contain an N-terminal ArfGAP domain containing the characteristic zinc finger motif (Cys-x2-Cys-x(16,17)-x2-Cys) and C-terminal C2 domain. C2 domains were first identified in Protein Kinase C (PKC). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176003 [Multi-domain] Cd Length: 145 Bit Score: 48.86 E-value: 5.76e-07

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPKLDITglSANPYVKLNvfYGHKriaKKKTHVKKCTLNPVFNESFIYDVPAELLPdisIEFLVMDFDRT 414
Cdd:cd04038    4 LKVRVVRGTNLAVRDFT--SSDPYVVLT--LGNQ---KVKTRVIKKNLNPVWNEELTLSVPNPMAP---LKLEVFDKDTF 73


                 ....*..
gi 242117955 415 TKNQALG 421
Cdd:cd04038   74 SKDDSMG 80

C2 domain second repeat present in RAS p21 protein activator 3 (RasA3); RasA3 are members of GTPase activating protein 1 (GAP1), a Ras-specific GAP, which suppresses Ras function by enhancing the GTPase activity of Ras proteins resulting in the inactive GDP-bound form of Ras. In this way it can control cellular proliferation and differentiation. RasA3 contains an N-terminal C2 domain, a Ras-GAP domain, a plextrin homology (PH)-like domain, and a Bruton's Tyrosine Kinase (BTK) zinc binding domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 175977 [Multi-domain] Cd Length: 148 Bit Score: 48.55 E-value: 7.09e-07

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPAVegqTGSADPYVKMTILPEKKHRV--KTRVLRKTLEPAFDETFTF-------YGVPYSSLSDLTLHF 272
Cdd:cd04010    2 LSVRVIECSDLALK---NGTCDPYASVTLIYSNKKQDtkRTKVKKKTNNPQFDEAFYFdvtidssPEKKQFEMPEEDAEK 78

                         90       100       110
                 ....*....|....*....|....*....|....
gi 242117955 273 LVLSFDRFS----RDDV-IGEAMVPLAGVDPSTG 301
Cdd:cd04010   79 LELRVDLWHasmgGGDVfLGEVRIPLRGLDLQAG 112

C2 domain present in Calpain proteins; A single C2 domain is found in calpains (EC 3.4.22.52, EC 3.4.22.53), calcium-dependent, non-lysosomal cysteine proteases. Caplains are classified as belonging to Clan CA by MEROPS and include six families: C1, C2, C10, C12, C28, and C47. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176011 [Multi-domain] Cd Length: 126 Bit Score: 48.04 E-value: 7.80e-07

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 198 PKKALVVTILEARGLPAvEGQTGSADPYVKMTIlpEKKhRVKTRVLRKTLEPAFDETFTFY----GVPYSslsdltlhFL 273
Cdd:cd04046    1 PQVVTQVHVHSAEGLSK-QDSGGGADPYVIIKC--EGE-SVRSPVQKDTLSPEFDTQAIFYrkkpRSPIK--------IQ 68

                         90       100       110
                 ....*....|....*....|....*....|....*....
gi 242117955 274 VLSfDRFSRDDVIGEAMVPlagVDPSTGRVHITQQITKR 312
Cdd:cd04046   69 VWN-SNLLCDEFLGQATLS---ADPNDSQTLRTLPLRKR 103

C2 domain found in Rab11-family interacting proteins (FIP) class I; Rab GTPases recruit various effector proteins to organelles and vesicles. Rab11-family interacting proteins (FIPs) are involved in mediating the role of Rab11. FIPs can be divided into three classes: class I FIPs (Rip11a, Rip11b, RCP, and FIP2) which contain a C2 domain after N-terminus of the protein, class II FIPs (FIP3 and FIP4) which contain two EF-hands and a proline rich region, and class III FIPs (FIP1) which exhibits no homology to known protein domains. All FIP proteins contain a highly conserved, 20-amino acid motif at the C-terminus of the protein, known as Rab11/25 binding domain (RBD). Class I FIPs are thought to bind to endocytic membranes via their C2 domain, which interacts directly with phospholipids. Class II FIPs do not have any membrane binding domains leaving much to speculate about the mechanism involving FIP3 and FIP4 interactions with endocytic membranes. The members in this CD are class I FIPs. The exact function of the Rab11 and FIP interaction is unknown, but there is speculation that it involves the role of forming a targeting complex that recruits a group of proteins involved in membrane transport to organelles. The C2 domain was first identified in PKC. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176064 [Multi-domain] Cd Length: 126 Bit Score: 47.83 E-value: 8.07e-07

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 203 VVTILEARGLpAVEGQTGSADPYVKMTILPEKkhrVKTRVLRKTLEPAFDE--TFTFYGVPYSSLSDLTLHFLVLSFDRF 280
Cdd:cd08682    2 QVTVLQARGL-LCKGKSGTNDAYVIIQLGKEK---YSTSVKEKTTSPVWKEecSFELPGLLSGNGNRATLQLTVMHRNLL 77

                         90       100
                 ....*....|....*....|..
gi 242117955 281 SRDDVIGEAMVPLAGVDPSTGR 302
Cdd:cd08682   78 GLDKFLGQVSIPLNDLDEDKGR 99

C2 domain second repeat present in Synaptotagmin 15; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. It is thought to be involved in the trafficking and exocytosis of secretory vesicles in non-neuronal tissues and is Ca2+ independent. Human synaptotagmin 15 has 2 alternatively spliced forms that encode proteins with different C-termini. The larger, SYT15a, contains a N-terminal TM region, a putative fatty-acylation site, and 2 tandem C terminal C2 domains. The smaller, SYT15b, lacks the C-terminal portion of the second C2 domain. Unlike most other synaptotagmins it is nearly absent in the brain and rather is found in the heart, lungs, skeletal muscle, and testis. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176054 [Multi-domain] Cd Length: 137 Bit Score: 47.72 E-value: 1.12e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 186 RGDLSIAIDYNFPKKALVVTILEARGLPAVEGQtgSADPYVK--MTILPEKKHRVKTRVLRKTLEPAFDETFTFyGVPYS 263
Cdd:cd08409    1 LGDIQISLTYNPTLNRLTVVVLRARGLRQLDHA--HTSVYVKvsLMIHNKVVKTKKTEVVDGAASPSFNESFSF-KVTSR 77

                         90
                 ....*....|..
gi 242117955 264 SLSDLTLHFLVL 275
Cdd:cd08409   78 QLDTASLSLSVM 89

C2 domain fourth repeat in Ferlin; Ferlins are involved in vesicle fusion events. Ferlins and other proteins, such as Synaptotagmins, are implicated in facilitating the fusion process when cell membranes fuse together. There are six known human Ferlins: Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin (Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these genes can lead to a wide range of diseases including muscular dystrophy (dysferlin), deafness (otoferlin), and infertility (fer-1, fertilization factor-1). Structurally they have 6 tandem C2 domains, designated as (C2A-C2F) and a single C-terminal transmembrane domain, though there is a new study that disputes this and claims that there are actually 7 tandem C2 domains with another C2 domain inserted between C2D and C2E. In a subset of them (Dysferlin, Myoferlin, and Fer1) there is an additional conserved domain called DysF. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the fourth C2 repeat, C2D, and has a type-II topology.

Pssm-ID: 175984 [Multi-domain] Cd Length: 135 Bit Score: 47.54 E-value: 1.21e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 206 ILEARGLPAVEgQTGSADPYVKMTILpekKHRVKTRVLRKTLEPAFDETFTFYGVP-YSSLSDLTLH-----FLVLSFDR 279
Cdd:cd04017    7 IYQARDLLAAD-KSGLSDPFARVSFL---NQSQETEVIKETLSPTWDQTLIFDEVElYGSPEEIAQNpplvvVELFDQDS 82

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|
gi 242117955 280 FSRDDVIGEA----MVPLAGVDPSTGRVHiTQQITKRNMQCvshGELLVS 325
Cdd:cd04017   83 VGKDEFLGRSvakpLVKLDLEEDFPPKLQ-WFPIYKGGQSA---GELLAA 128

C2 domain fifth repeat in Ferlin; Ferlins are involved in vesicle fusion events. Ferlins and other proteins, such as Synaptotagmins, are implicated in facilitating the fusion process when cell membranes fuse together. There are six known human Ferlins: Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin (Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these genes can lead to a wide range of diseases including muscular dystrophy (dysferlin), deafness (otoferlin), and infertility (fer-1, fertilization factor-1). Structurally they have 6 tandem C2 domains, designated as (C2A-C2F) and a single C-terminal transmembrane domain, though there is a new study that disputes this and claims that there are actually 7 tandem C2 domains with another C2 domain inserted between C2D and C2E. In a subset of them (Dysferlin, Myoferlin, and Fer1) there is an additional conserved domain called DysF. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the fifth C2 repeat, C2E, and has a type-II topology.

Pssm-ID: 176002 [Multi-domain] Cd Length: 124 Bit Score: 47.16 E-value: 1.24e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 204 VTILEARGLPAvEGQTGSADPYVKMTiLPEKKHRVKTRVLRKTLEPAFDETFTFYG-VPYSSLsdltLHFLVLSFDRFSR 282
Cdd:cd04037    4 VYVVRARNLQP-KDPNGKSDPYLKIK-LGKKKINDRDNYIPNTLNPVFGKMFELEAtLPGNSI----LKISVMDYDLLGS 77


                 ....*.
gi 242117955 283 DDVIGE 288
Cdd:cd04037   78 DDLIGE 83

C2 domain present in Phosphoinositide-specific phospholipases C (PLC); PLCs are involved in the hydrolysis of phosphatidylinositol-4,5-bisphosphate (PIP2) to d-myo-inositol-1,4,5-trisphosphate (1,4,5-IP3) and sn-1,2-diacylglycerol (DAG). 1,4,5-IP3 and DAG are second messengers in eukaryotic signal transduction cascades. PLC is composed of a N-terminal PH domain followed by a series of EF hands, a catalytic TIM barrel and a C-terminal C2 domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-II topology.

Pssm-ID: 175974 [Multi-domain] Cd Length: 128 Bit Score: 47.15 E-value: 1.41e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 199 KKALVVTILEARGLPAVEGQTGSA-DPYVKMTIL---PEKKHRVKTRVLRK-TLEPAFDETFTFYgVPYSSLSdlTLHFL 273
Cdd:cd00275    1 PLTLTIKIISGQQLPKPKGDKGSIvDPYVEVEIHglpADDSAKFKTKVVKNnGFNPVWNETFEFD-VTVPELA--FLRFV 77

                         90       100
                 ....*....|....*....|
gi 242117955 274 VLSFDRFsRDDVIGEAMVPL 293
Cdd:cd00275   78 VYDEDSG-DDDFLGQACLPL 96

C2 domain first repeat present in RasA1 and RasA4; Rasal1 and RasA4 are both members of GAP1 (GTPase activating protein 1). Rasal1 responds to repetitive Ca2+ signals by associating with the plasma membrane and deactivating Ras. RasA4 suppresses Ras function by enhancing the GTPase activity of Ras proteins resulting in the inactive GDP-bound form of Ras. In this way it can control cellular proliferation and differentiation. Both of these proteins contains two C2 domains, a Ras-GAP domain, a plextrin homology (PH)-like domain, and a Bruton's Tyrosine Kinase (BTK) zinc binding domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176018 [Multi-domain] Cd Length: 121 Bit Score: 46.74 E-value: 1.66e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 201 ALVVTILEARGLPAvEGQTGSADPYVKMTILPEKKHRVKTrvLRKTLEPAFDETFTFYGVPYSSlsdlTLHFLVLSFDRF 280
Cdd:cd04054    1 SLYIRIVEGKNLPA-KDITGSSDPYCIVKVDNEVIIRTAT--VWKTLNPFWGEEYTVHLPPGFH----TVSFYVLDEDTL 73


                 ....*...
gi 242117955 281 SRDDVIGE 288
Cdd:cd04054   74 SRDDVIGK 81

C2 domain in Munc13 (mammalian uncoordinated) proteins; fungal group; C2-like domains are thought to be involved in phospholipid binding in a Ca2+ independent manner in both Unc13 and Munc13. Caenorabditis elegans Unc13 has a central domain with sequence similarity to PKC, which includes C1 and C2-related domains. Unc13 binds phorbol esters and DAG with high affinity in a phospholipid manner. Mutations in Unc13 results in abnormal neuronal connections and impairment in cholinergic neurotransmission in the nematode. Munc13 is the mammalian homolog which are expressed in the brain. There are 3 isoforms (Munc13-1, -2, -3) and are thought to play a role in neurotransmitter release and are hypothesized to be high-affinity receptors for phorbol esters. Unc13 and Munc13 contain both C1 and C2 domains. There are two C2 related domains present, one central and one at the carboxyl end. Munc13-1 contains a third C2-like domain. Munc13 interacts with syntaxin, synaptobrevin, and synaptotagmin suggesting a role for these as scaffolding proteins. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-II topology.

Pssm-ID: 176008 [Multi-domain] Cd Length: 126 Bit Score: 46.87 E-value: 1.71e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 204 VTILEARGLPAvEGQTGSADPYVKMTILPEKKHRVKTRVLRKTLEPAFDETFTfygVPYSSLSDLTLHFLVLSFDRFSRD 283
Cdd:cd04043    5 IRIVRAENLKA-DSSNGLSDPYVTLVDTNGKRRIAKTRTIYDTLNPRWDEEFE---LEVPAGEPLWISATVWDRSFVGKH 80

                         90
                 ....*....|....*.
gi 242117955 284 DVIGEAMVPLagvDPS 299
Cdd:cd04043   81 DLCGRASLKL---DPK 93

C2 domain second repeat in Ferlin; Ferlins are involved in vesicle fusion events. Ferlins and other proteins, such as Synaptotagmins, are implicated in facilitating the fusion process when cell membranes fuse together. There are six known human Ferlins: Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin (Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these genes can lead to a wide range of diseases including muscular dystrophy (dysferlin), deafness (otoferlin), and infertility (fer-1, fertilization factor-1). Structurally they have 6 tandem C2 domains, designated as (C2A-C2F) and a single C-terminal transmembrane domain, though there is a new study that disputes this and claims that there are actually 7 tandem C2 domains with another C2 domain inserted between C2D and C2E. In a subset of them (Dysferlin, Myoferlin, and Fer1) there is an additional conserved domain called DysF. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-II topology.

Pssm-ID: 175978 [Multi-domain] Cd Length: 111 Bit Score: 46.03 E-value: 2.70e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 330 PVSHRLSVVVLKAKHLPKLDItglsaNPYVKLNVfyGHKriaKKKTHVKKCTLNPVFNESFIYDV--PAELLPDISIEFL 407
Cdd:cd04011    1 PQDFQVRVRVIEARQLVGGNI-----DPVVKVEV--GGQ---KKYTSVKKGTNCPFYNEYFFFNFheSPDELFDKIIKIS 70

                         90
                 ....*....|....
gi 242117955 408 VMDFDRTTKNQALG 421
Cdd:cd04011   71 VYDSRSLRSDTLIG 84

C2 domain second repeat present in Synaptotagmin 12; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 12, a member of class 6 synaptotagmins, is located in the brain. It functions are unknown. It, like synaptotagmins 8 and 13, do not have any consensus Ca2+ binding sites. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176051 [Multi-domain] Cd Length: 136 Bit Score: 46.71 E-value: 2.89e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 187 GDLSIAIDYNFPKKALVVTILEARGLPAVEGQTgSADPYVKMTILPE--KKHRVKTRVLRKTLEPAFDETFTFyGVPYSS 264
Cdd:cd08406    2 GEILLSLSYLPTAERLTVVVVKARNLVWDNGKT-TADPFVKVYLLQDgrKISKKKTSVKRDDTNPIFNEAMIF-SVPAIV 79

                         90       100
                 ....*....|....*....|....*..
gi 242117955 265 LSDLTLHFLVLSFDRFSRDDVIGEAMV 291
Cdd:cd08406   80 LQDLSLRVTVAESTEDGKTPNVGHVII 106

C2 domain first repeat found in Multiple C2 domain and Transmembrane region Proteins (MCTP); plant subset; MCTPs are involved in Ca2+ signaling at the membrane. Plant-MCTPs are composed of a variable N-terminal sequence, four C2 domains, two transmembrane regions (TMRs), and a short C-terminal sequence. It is one of four protein classes that are anchored to membranes via a transmembrane region; the others being synaptotagmins, extended synaptotagmins, and ferlins. MCTPs are the only membrane-bound C2 domain proteins that contain two functional TMRs. MCTPs are unique in that they bind Ca2+ but not phospholipids. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-II topology.

Pssm-ID: 175989 [Multi-domain] Cd Length: 127 Bit Score: 46.18 E-value: 2.93e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 334 RLSVVVLKAKHLPKLDITGlSANPYVKLNvFYGHKriakKKTHVKKCTLNPVFNESFIYDVP-AELLPDISIEFLVMDFD 412
Cdd:cd04022    1 KLVVEVVDAQDLMPKDGQG-SSSAYVELD-FDGQK----KRTRTKPKDLNPVWNEKLVFNVSdPSRLSNLVLEVYVYNDR 74

                         90       100
                 ....*....|....*....|....*
gi 242117955 413 RTT-KNQALGRLVLGADSPCPSGAA 436
Cdd:cd04022   75 RSGrRRSFLGRVRISGTSFVPPSEA 99

C2 domain second repeat found in Multiple C2 domain and Transmembrane region Proteins (MCTP); MCTPs are involved in Ca2+ signaling at the membrane. MCTP is composed of a variable N-terminal sequence, three C2 domains, two transmembrane regions (TMRs), and a short C-terminal sequence. It is one of four protein classes that are anchored to membranes via a transmembrane region; the others being synaptotagmins, extended synaptotagmins, and ferlins. MCTPs are the only membrane-bound C2 domain proteins that contain two functional TMRs. MCTPs are unique in that they bind Ca2+ but not phospholipids. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-II topology.

Pssm-ID: 176022 [Multi-domain] Cd Length: 116 Bit Score: 45.71 E-value: 3.43e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 203 VVTI--LEARGLPAVEGqTGSADPYVKMTILPEKKhrvKTRVLRKTLEPAFDETFTFYgvpYSSLSDLTLHFLVLSFDRF 280
Cdd:cd08376    1 VVTIvlVEGKNLPPMDD-NGLSDPYVKFRLGNEKY---KSKVCSKTLNPQWLEQFDLH---LFDDQSQILEIEVWDKDTG 73

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|..
gi 242117955 281 SRDDVIGEAMVPLAGV------------DPSTGRVHITQQIT 310
Cdd:cd08376   74 KKDEFIGRCEIDLSALpreqthslelelEDGEGSLLLLLTLT 115

C2 domain second repeat present in Synaptotagmin-like proteins; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176015 [Multi-domain] Cd Length: 105 Bit Score: 45.25 E-value: 3.76e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPkLDITGLSANPYVKLNVfyGHKriaKKKTHVKKCTLNPVFNESF---IYDVPAELLpdisiEFLVMDF 411
Cdd:cd04050    2 LFVYLDSAKNLP-LAKSTKEPSPYVELTV--GKT---TQKSKVKERTNNPVWEEGFtflVRNPENQEL-----EIEVKDD 70

                         90
                 ....*....|....
gi 242117955 412 DRttkNQALGRLVL 425
Cdd:cd04050   71 KT---GKSLGSLTL 81

C2 domain first and third repeat in Synaptotagmin-like proteins; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains either the first or third repeat in Synaptotagmin-like proteins with a type-I topology.

Pssm-ID: 176037 [Multi-domain] Cd Length: 121 Bit Score: 45.75 E-value: 4.29e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPKLDI--TGLSAN---PYVKLNVfyGHKriaKKKTHVKKCTLNPVFN---ESFIYDVPAEllpdiSIEF 406
Cdd:cd08391    3 LRIHVIEAQDLVAKDKfvGGLVKGksdPYVIVRV--GAQ---TFKSKVIKENLNPKWNevyEAVVDEVPGQ-----ELEI 72

                         90
                 ....*....|....*..
gi 242117955 407 LVMDFDrTTKNQALGRL 423
Cdd:cd08391   73 ELFDED-PDKDDFLGRL 88

Ca2+-dependent lipid-binding protein, contains C2 domain [General function prediction only];

Pssm-ID: 227371 [Multi-domain] Cd Length: 1227 Bit Score: 49.37 E-value: 4.69e-06

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955  202 LVVTILEARGLPAVEgQTGSADPYVKMtILPEKKHRvKTRVLRKTLEPAFDETFTFYgVPYSSLSDLTLHflVLSFDRFS 281
Cdd:COG5038  1042 LTIMLRSGENLPSSD-ENGYSDPFVKL-FLNEKSVY-KTKVVKKTLNPVWNEEFTIE-VLNRVKDVLTIN--VNDWDSGE 1115

                          90
                  ....*....|....*..
gi 242117955  282 RDDVIGEAMVPLAGVDP 298
Cdd:COG5038  1116 KNDLLGTAEIDLSKLEP 1132

C2 domain second repeat contained in Rab3-interacting molecule (RIM) proteins; RIMs are believed to organize specialized sites of the plasma membrane called active zones. They also play a role in controlling neurotransmitter release, plasticity processes, as well as memory and learning. RIM contains an N-terminal zinc finger domain, a PDZ domain, and two C-terminal C2 domains (C2A, C2B). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-I topology and do not bind Ca2+.

Pssm-ID: 175994 [Multi-domain] Cd Length: 146 Bit Score: 46.23 E-value: 4.95e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 184 PSRGDLSIAIDYNfpKKALVVTILEARGLPAVEGQTGSADPYVKMTILPEKK--HRVKTRVLRKTLEPAFDETFTFygvp 261
Cdd:cd04028   15 PSMGDIQLGLYDK--KGQLEVEVIRARGLVQKPGSKVLPAPYVKVYLLEGKKciAKKKTKIARKTLDPLYQQQLVF---- 88

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|
gi 242117955 262 YSSLSDLTLHFLVL-SFDRFSRDDVIGEAMVPLAGVDPST 300
Cdd:cd04028   89 DVSPTGKTLQVIVWgDYGRMDKKVFMGVAQILLDDLDLSN 128

C2 domain second repeat contained in Rab3-interacting molecule (RIM) proteins; RIMs are believed to organize specialized sites of the plasma membrane called active zones. They also play a role in controlling neurotransmitter release, plasticity processes, as well as memory and learning. RIM contains an N-terminal zinc finger domain, a PDZ domain, and two C-terminal C2 domains (C2A, C2B). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-I topology and do not bind Ca2+.

Pssm-ID: 175994 [Multi-domain] Cd Length: 146 Bit Score: 45.84 E-value: 5.45e-06

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 242117955 318 SHGELLVSLSYQpvSHRLSVVVLKAKHL-PKLDITGLSAnPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDV 394
Cdd:cd04028   16 SMGDIQLGLYDK--KGQLEVEVIRARGLvQKPGSKVLPA-PYVKVYLLEGKKCIAKKKTKIARKTLDPLYQQQLVFDV 90

C2 domain first repeat present in Synaptotagmin-like proteins; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 175990 [Multi-domain] Cd Length: 128 Bit Score: 45.49 E-value: 6.64e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPKLDITGL-SANPYVKLNVfyGHKRIakkKTHVKKCTLNPVFNESfiYDVPAELLPDISIEFLVMDFDR 413
Cdd:cd04024    3 LRVHVVEAKDLAAKDRSGKgKSDPYAILSV--GAQRF---KTQTIPNTLNPKWNYW--CEFPIFSAQNQLLKLILWDKDR 75

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|..
gi 242117955 414 TTKNQALGRLVLGADSpcpsgAAHWQEVCQNPrrqisKWHTL 455
Cdd:cd04024   76 FAGKDYLGEFDIALEE-----VFADGKTGQSD-----KWITL 107

C2 domain (first repeat) of Ras GTPase activating proteins (GAPs); RasGAPs suppress Ras function by enhancing the GTPase activity of Ras proteins resulting in the inactive GDP-bound form of Ras. In this way it can control cellular proliferation and differentiation. The proteins here all contain either a single C2 domain or two tandem C2 domains, a Ras-GAP domain, and a pleckstrin homology (PH)-like domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-I topology.

Pssm-ID: 176029 [Multi-domain] Cd Length: 117 Bit Score: 44.56 E-value: 8.82e-06

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPAvegqTGSADPYVKMTILPEKKHRVKTrvlRKTLEPAFDETFTFYGVPYSSLSdLTLHFLVLSFDRFS 281
Cdd:cd08383    2 LRLRILEAKNLPS----KGTRDPYCTVSLDQVEVARTKT---VEKLNPFWGEEFVFDDPPPDVTF-FTLSFYNKDKRSKD 73

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|
gi 242117955 282 RDDVIG-------------EAMVPLAGVDPST---GRVHI 305
Cdd:cd08383   74 RDIVIGkvalskldlgqgkDEWFPLTPVDPDSevqGSVRL 113

C2 domain first repeat in Munc13 (mammalian uncoordinated)-like proteins; C2-like domains are thought to be involved in phospholipid binding in a Ca2+ independent manner in both Unc13 and Munc13. Caenorabditis elegans Unc13 has a central domain with sequence similarity to PKC, which includes C1 and C2-related domains. Unc13 binds phorbol esters and DAG with high affinity in a phospholipid manner. Mutations in Unc13 results in abnormal neuronal connections and impairment in cholinergic neurotransmission in the nematode. Munc13 is the mammalian homolog which are expressed in the brain. There are 3 isoforms (Munc13-1, -2, -3) and are thought to play a role in neurotransmitter release and are hypothesized to be high-affinity receptors for phorbol esters. Unc13 and Munc13 contain both C1 and C2 domains. There are two C2 related domains present, one central and one at the carboxyl end. Munc13-1 contains a third C2-like domain. Munc13 interacts with syntaxin, synaptobrevin, and synaptotagmin suggesting a role for these as scaffolding proteins. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-II topology.

Pssm-ID: 176058 [Multi-domain] Cd Length: 153 Bit Score: 45.44 E-value: 1.10e-05

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 313 NMQCVSHGELLVSLSYQ-PVSHRLSVVVLKAKHLPKLDITGLSaNPYVKLNV--------------FYGHKRIAKKK--- 374
Cdd:cd08676    7 GVSPEEHEALLERVREAePPIFVLKVTVIEAKGLLAKDVNGFS-DPYCMLGIvpasrernsekskkRKSHRKKAVLKdtv 85

                         90       100
                 ....*....|....*....|....*..
gi 242117955 375 -------THVKKCTLNPVFNESFIYDV 394
Cdd:cd08676   86 paksikvTEVKPQTLNPVWNETFRFEV 112

C2 domain second repeat of Ras GTPase activating proteins (GAPs); RasGAPs suppress Ras function by enhancing the GTPase activity of Ras proteins resulting in the inactive GDP-bound form of Ras. In this way it can control cellular proliferation and differentiation. The proteins here all contain two tandem C2 domains, a Ras-GAP domain, and a pleckstrin homology (PH)-like domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-I topology.

Pssm-ID: 176057 [Multi-domain] Cd Length: 137 Bit Score: 44.67 E-value: 1.32e-05

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 242117955 335 LSVVVLKAKHLPKldITGLSANPYVKLNVFYGHKRIAKKkTHVKKCTLNPVFNESFIYDVP 395
Cdd:cd08675    1 LSVRVLECRDLAL--KSNGTCDPFARVTLNYSSKTDTKR-TKVKKKTNNPRFDEAFYFELT 58

Ca2+-dependent lipid-binding protein, contains C2 domain [General function prediction only];

Pssm-ID: 227371 [Multi-domain] Cd Length: 1227 Bit Score: 47.06 E-value: 2.51e-05

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955  335 LSVVVLKAKHLPKLD--ITGLSaNPYVklnVFYGHKRIaKKKTHVKKCTLNPVFNESFiYdVPAELLPD-ISIEflVMDF 411
Cdd:COG5038   438 VEVKIKSAEGLKKSDstINGTV-DPYI---TVTFSDRV-IGKTRVKKNTLNPVWNETF-Y-ILLNSFTDpLNLS--LYDF 508

                          90
                  ....*....|....*
gi 242117955  412 DRTTKNQALGRLVLG 426
Cdd:COG5038   509 NSFKSDKVVGSTQLD 523

C2 domain present in cytosolic PhosphoLipase A2 (cPLA2); A single copy of the C2 domain is present in cPLA2 which releases arachidonic acid from membranes initiating the biosynthesis of potent inflammatory mediators such as prostaglandins, leukotrienes, and platelet-activating factor. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members of this cd have a type-II topology.

Pssm-ID: 176001 [Multi-domain] Cd Length: 119 Bit Score: 43.02 E-value: 3.18e-05

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 334 RLSVVVLKAKHLPKLDItgLS-ANPYVKLNVfyghkRIA---KKKT-HVKKCTlNPVFNESFIYDVPAELlpDISIEFLV 408
Cdd:cd04036    1 LLTVRVLRATNITKGDL--LStPDCYVELWL-----PTAsdeKKRTkTIKNSI-NPVWNETFEFRIQSQV--KNVLELTV 70


                 ....
gi 242117955 409 MDFD 412
Cdd:cd04036   71 MDED 74

C2 domain first repeat found in Multiple C2 domain and Transmembrane region Proteins (MCTP); plant subset; MCTPs are involved in Ca2+ signaling at the membrane. Plant-MCTPs are composed of a variable N-terminal sequence, four C2 domains, two transmembrane regions (TMRs), and a short C-terminal sequence. It is one of four protein classes that are anchored to membranes via a transmembrane region; the others being synaptotagmins, extended synaptotagmins, and ferlins. MCTPs are the only membrane-bound C2 domain proteins that contain two functional TMRs. MCTPs are unique in that they bind Ca2+ but not phospholipids. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-II topology.

Pssm-ID: 175989 [Multi-domain] Cd Length: 127 Bit Score: 43.09 E-value: 4.12e-05

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPAVEGQtGSADPYVKMTILpEKKHRVKTRVlrKTLEPAFDETFTFYGVPYSSLSDLTLHFLVLSFDRFS 281
Cdd:cd04022    2 LVVEVVDAQDLMPKDGQ-GSSSAYVELDFD-GQKKRTRTKP--KDLNPVWNEKLVFNVSDPSRLSNLVLEVYVYNDRRSG 77


                 .
gi 242117955 282 R 282
Cdd:cd04022   78 R 78

C2 domain present in the putative elicitor-responsive gene; In plants elicitor-responsive proteins are triggered in response to specific elicitor molecules such as glycolproteins, peptides, carbohydrates and lipids. A host of defensive responses are also triggered resulting in localized cell death. Antimicrobial secondary metabolites, such as phytoalexins, or defense-related proteins, including pathogenesis-related (PR) proteins are also produced. There is a single C2 domain present here. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members have a type-II topology.

Pssm-ID: 176014 [Multi-domain] Cd Length: 124 Bit Score: 42.70 E-value: 5.31e-05

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPAVEgQTGSADPYVKMTilpekkhrVKTRVLRKTL------EPAFDETFTFyGVPYSSLSDLT-LHFLV 274
Cdd:cd04049    3 LEVLLISAKGLQDTD-FLGKIDPYVIIQ--------CRTQERKSKVakgdgrNPEWNEKFKF-TVEYPGWGGDTkLILRI 72

                         90       100       110
                 ....*....|....*....|....*....|.
gi 242117955 275 LSFDRFSRDDVIGEAMVPL-----AGVDPST 300
Cdd:cd04049   73 MDKDNFSDDDFIGEATIHLkglfeEGVEPGT 103

C2 domain second repeat found in Multiple C2 domain and Transmembrane region Proteins (MCTP); MCTPs are involved in Ca2+ signaling at the membrane. MCTP is composed of a variable N-terminal sequence, three C2 domains, two transmembrane regions (TMRs), and a short C-terminal sequence. It is one of four protein classes that are anchored to membranes via a transmembrane region; the others being synaptotagmins, extended synaptotagmins, and ferlins. MCTPs are the only membrane-bound C2 domain proteins that contain two functional TMRs. MCTPs are unique in that they bind Ca2+ but not phospholipids. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-II topology.

Pssm-ID: 176022 [Multi-domain] Cd Length: 116 Bit Score: 42.24 E-value: 5.47e-05

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPKLDITGLSaNPYVKLNVfyGHKriaKKKTHVKKCTLNPVFNESF---IYDVPAELLpdisiEFLVMDF 411
Cdd:cd08376    2 VTIVLVEGKNLPPMDDNGLS-DPYVKFRL--GNE---KYKSKVCSKTLNPQWLEQFdlhLFDDQSQIL-----EIEVWDK 70

                         90
                 ....*....|....
gi 242117955 412 DRTTKNQALGRLVL 425
Cdd:cd08376   71 DTGKKDEFIGRCEI 84

C2 domain in Munc13 (mammalian uncoordinated) proteins; fungal group; C2-like domains are thought to be involved in phospholipid binding in a Ca2+ independent manner in both Unc13 and Munc13. Caenorabditis elegans Unc13 has a central domain with sequence similarity to PKC, which includes C1 and C2-related domains. Unc13 binds phorbol esters and DAG with high affinity in a phospholipid manner. Mutations in Unc13 results in abnormal neuronal connections and impairment in cholinergic neurotransmission in the nematode. Munc13 is the mammalian homolog which are expressed in the brain. There are 3 isoforms (Munc13-1, -2, -3) and are thought to play a role in neurotransmitter release and are hypothesized to be high-affinity receptors for phorbol esters. Unc13 and Munc13 contain both C1 and C2 domains. There are two C2 related domains present, one central and one at the carboxyl end. Munc13-1 contains a third C2-like domain. Munc13 interacts with syntaxin, synaptobrevin, and synaptotagmin suggesting a role for these as scaffolding proteins. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-II topology.

Pssm-ID: 176008 [Multi-domain] Cd Length: 126 Bit Score: 42.64 E-value: 5.90e-05

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 333 HRLSVVVLKAKHLPKLDITGLSaNPYVKLNVFYGHKRIAKKKThVKKcTLNPVFNESFIYDVPAELLPDISieFLVMDFD 412
Cdd:cd04043    1 HLFTIRIVRAENLKADSSNGLS-DPYVTLVDTNGKRRIAKTRT-IYD-TLNPRWDEEFELEVPAGEPLWIS--ATVWDRS 75

                         90
                 ....*....|
gi 242117955 413 RTTKNQALGR 422
Cdd:cd04043   76 FVGKHDLCGR 85

C2 domain first repeat present in Tricalbin-like proteins; 5 to 6 copies of the C2 domain are present in Tricalbin, a yeast homolog of Synaptotagmin, which is involved in membrane trafficking and sorting. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-II topology.

Pssm-ID: 176009 [Multi-domain] Cd Length: 124 Bit Score: 42.54 E-value: 6.55e-05

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPKLDITGLSANPYVKLNvFYGHKRIAKkkTHVKKCTLNPVFNESfIYdVPAELLPDiSIEFLVMDFDRT 414
Cdd:cd04044    4 LAVTIKSARGLKGSDIIGGTVDPYVTFS-ISNRRELAR--TKVKKDTSNPVWNET-KY-ILVNSLTE-PLNLTVYDFNDK 77

                         90
                 ....*....|.
gi 242117955 415 TKNQALGRLVL 425
Cdd:cd04044   78 RKDKLIGTAEF 88

C2 domain third repeat in Ferlin; Ferlins are involved in vesicle fusion events. Ferlins and other proteins, such as Synaptotagmins, are implicated in facilitating the fusion process when cell membranes fuse together. There are six known human Ferlins: Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin (Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these genes can lead to a wide range of diseases including muscular dystrophy (dysferlin), deafness (otoferlin), and infertility (fer-1, fertilization factor-1). Structurally they have 6 tandem C2 domains, designated as (C2A-C2F) and a single C-terminal transmembrane domain, though there is a new study that disputes this and claims that there are actually 7 tandem C2 domains with another C2 domain inserted between C2D and C2E. In a subset of them (Dysferlin, Myoferlin, and Fer1) there is an additional conserved domain called DysF. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the third C2 repeat, C2C, and has a type-II topology.

Pssm-ID: 175985 [Multi-domain] Cd Length: 151 Bit Score: 42.62 E-value: 8.94e-05

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 334 RLSVVVLKAKHLPKLDiTGLSAN--------------PYVKLNvFYGHKRiakkKTHVKKCTLNPVFNESFIYdvpAELL 399
Cdd:cd04018    1 RFIFKIYRAEDLPQMD-SGIMANvkkaflgekkelvdPYVEVS-FAGQKV----KTSVKKNSYNPEWNEQIVF---PEMF 71

                         90       100
                 ....*....|....*....|....
gi 242117955 400 PDI--SIEFLVMDFDRTTKNQALG 421
Cdd:cd04018   72 PPLceRIKIQIRDWDRVGNDDVIG 95

C2 domain of the Regulator Of G-Protein Signaling (RGS) family; This CD contains members of the regulator of G-protein signaling (RGS) family. RGS is a GTPase activating protein which inhibits G-protein mediated signal transduction. The protein is largely cytosolic, but G-protein activation leads to translocation of this protein to the plasma membrane. A nuclear form of this protein has also been described, but its sequence has not been identified. There are multiple alternatively spliced transcript variants in this family with some members having additional domains (ex. PDZ and RGS) downstream of the C2 domain. The C2 domain was first identified in PKC. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176067 [Multi-domain] Cd Length: 119 Bit Score: 41.67 E-value: 9.60e-05

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 320 GELLVSLSYQpvSHRLSVVVLKAKHLPKLDITglSANPYVKLNVFYGHKRIAKKKTHVKKCTLNPVFNESFIYDVPAEll 399
Cdd:cd08685    1 GQLKLSIEGQ--NRKLTLHVLEAKGLRSTNSG--TCNSYVKISLSPDKEVRFRQKTSTVPDSANPLFHETFSFDVNER-- 74

                         90
                 ....*....|....*..
gi 242117955 400 pDISIEFLVMDFDRTTK 416
Cdd:cd08685   75 -DYQKRLLVTVWNKLSK 90

C2 domain first repeat present in RasA2 and RasA3; RasA2 and RasA3 are GAP1s (GTPase activating protein 1s ), Ras-specific GAP members, which suppresses Ras function by enhancing the GTPase activity of Ras proteins resulting in the inactive GDP-bound form of Ras. In this way it can control cellular proliferation and differentiation. RasA2 and RasA3 are both inositol 1,3,4,5-tetrakisphosphate-binding proteins and contain an N-terminal C2 domain, a Ras-GAP domain, a pleckstrin-homology (PH) domain which localizes it to the plasma membrane, and Bruton's Tyrosine Kinase (BTK) a zinc binding domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176046 [Multi-domain] Cd Length: 121 Bit Score: 42.04 E-value: 9.63e-05

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPAVEGQTGSADPYVKMTILPEKKHRVKTRvlRKTLEPAFDETFTFyGVPYSslsdltlhFLVLSF---- 277
Cdd:cd08401    2 LKIKIGEAKNLPPRSGPNKMRDCYCTVNLDQEEVFRTKTV--EKSLCPFFGEDFYF-EIPRT--------FRHLSFyiyd 70

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*..
gi 242117955 278 -DRFSRDDVIGEAMV---------------PLAGVDPST---GRVHI 305
Cdd:cd08401   71 rDVLRRDSVIGKVAIkkedlhkyygkdtwfPLQPVDADSevqGKVHL 117

C2 domain found in the Human chromosome 21 open reading frame 25 (C21orf25) protein; The members in this cd are named after the Human C21orf25 which contains a single C2 domain. Several other members contain a C1 domain downstream of the C2 domain. No other information on this protein is currently known. The C2 domain was first identified in PKC. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176060 [Multi-domain] Cd Length: 126 Bit Score: 41.58 E-value: 1.48e-04

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLpavEGQTGSADPYVkmtIL----PEKKHrvKTRVLRKTLEPAFDETFTFygvpysSLSDLT--LHFLVL 275
Cdd:cd08678    1 LLVKNIKANGL---SEAAGSSNPYC---VLemdePPQKY--QSSTQKNTSNPFWDEHFLF------ELSPNSkeLLFEVY 66

                         90
                 ....*....|....*...
gi 242117955 276 SFDRFSRDDVIGEAMVPL 293
Cdd:cd08678   67 DNGKKSDSKFLGLAIVPF 84

C2 domain present in Phosphatidylserine decarboxylase (PSD); PSD is involved in the biosynthesis of aminophospholipid by converting phosphatidylserine (PtdSer) to phosphatidylethanolamine (PtdEtn). There is a single C2 domain present and it is thought to confer PtdSer binding motif that is common to PKC and synaptotagmin. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176004 [Multi-domain] Cd Length: 108 Bit Score: 40.70 E-value: 1.66e-04

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 242117955 339 VLKAKHLPKLD---ITGLSANPYVKlnVFYGHKRIakkKTHVKKCTLNPVFNESFIYDV-PAELlpDISIEFLVMDFDR 413
Cdd:cd04039    7 IKSITDLPPLKnmtRTGFDMDPFVI--ISFGRRVF---RTSWRRHTLNPVFNERLAFEVyPHEK--NFDIQFKVLDKDK 78

C2 domain second repeat in Munc13 (mammalian uncoordinated) proteins; C2-like domains are thought to be involved in phospholipid binding in a Ca2+ independent manner in both Unc13 and Munc13. Caenorabditis elegans Unc13 has a central domain with sequence similarity to PKC, which includes C1 and C2-related domains. Unc13 binds phorbol esters and DAG with high affinity in a phospholipid manner. Mutations in Unc13 results in abnormal neuronal connections and impairment in cholinergic neurotransmission in the nematode. Munc13 is the mammalian homolog which are expressed in the brain. There are 3 isoforms (Munc13-1, -2, -3) and are thought to play a role in neurotransmitter release and are hypothesized to be high-affinity receptors for phorbol esters. Unc13 and Munc13 contain both C1 and C2 domains. There are two C2 related domains present, one central and one at the carboxyl end. Munc13-1 contains a third C2-like domain. Munc13 interacts with syntaxin, synaptobrevin, and synaptotagmin suggesting a role for these as scaffolding proteins. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-II topology.

Pssm-ID: 175993 [Multi-domain] Cd Length: 127 Bit Score: 40.63 E-value: 2.58e-04

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 242117955 202 LVVTILEARGLPAvEGQTGSADPYVKMTILPEKKhrvKTRVLRKTLEPAFDETFTF 257
Cdd:cd04027    3 ISITVVCAQGLIA-KDKTGTSDPYVTVQVGKTKK---RTKTIPQNLNPVWNEKFHF 54

C2 domain found in Human protein Kibra; Kibra is thought to be a regulator of the Salvador (Sav)/Warts (Wts)/Hippo (Hpo) (SWH) signaling network, which limits tissue growth by inhibiting cell proliferation and promoting apoptosis. The core of the pathway consists of a MST and LATS family kinase cascade that ultimately phosphorylates and inactivates the YAP/Yorkie (Yki) transcription coactivator. The FERM domain proteins Merlin (Mer) and Expanded (Ex) are part of the upstream regulation controlling pathway mechanism. Kibra colocalizes and associates with Mer and Ex and is thought to transduce an extracellular signal via the SWH network. The apical scaffold machinery that contains Hpo, Wts, and Ex recruits Yki to the apical membrane facilitating its inhibitory phosphorlyation by Wts. Since Kibra associates with Ex and is apically located it is hypothesized that KIBRA is part of the scaffold, helps in the Hpo/Wts complex, and helps recruit Yki for inactivation that promotes SWH pathway activity. Kibra contains two amino-terminal WW domains, an internal C2-like domain, and a carboxy-terminal glutamic acid-rich stretch. The C2 domain was first identified in PKC. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176062 Cd Length: 124 Bit Score: 40.68 E-value: 2.69e-04

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 191 IAIDYNFPKKALVVTILEARGLPAVEGQTGSAdPYVKMTILPEKKHR---VKTRVLRKTLEPAFDETFTFyGVPYSSLSD 267
Cdd:cd08680    5 IGLRYDSGDSSLVISVEQLRNLSALSIPENSK-VYVRVALLPCSSSTsclFRTKALEDQDKPVFNEVFRV-PISSTKLYQ 82

                         90       100       110
                 ....*....|....*....|....*....|....*.
gi 242117955 268 LTLHFLVLSFDRFSRDDVIGEAMVPLAGVDPSTGRV 303
Cdd:cd08680   83 KTLQVDVCSVGPDQQEECLGGAQISLADFESSEEMS 118

C2 domain third repeat found in Multiple C2 domain and Transmembrane region Proteins (MCTP); MCTPs are involved in Ca2+ signaling at the membrane. The cds in this family contain multiple C2 domains as well as a C-terminal PRT domain. It is one of four protein classes that are anchored to membranes via a transmembrane region; the others being synaptotagmins, extended synaptotagmins, and ferlins. MCTPs are the only membrane-bound C2 domain proteins that contain two functional TMRs. MCTPs are unique in that they bind Ca2+ but not phospholipids. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the third C2 repeat, C2C, and has a type-II topology.

Pssm-ID: 176023 [Multi-domain] Cd Length: 119 Bit Score: 39.98 E-value: 4.68e-04

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 201 ALVVTILEARGLPAVEgQTGSADPYVkmtILPEKKHRVKTRVLRKTLEPAFDETFTFYGVPYSSLSDLTlhflVLSFDRF 280
Cdd:cd08377    2 FLQVKVIRASGLAAAD-IGGKSDPFC---VLELVNARLQTHTIYKTLNPEWNKIFTFPIKDIHDVLEVT----VYDEDKD 73

                         90
                 ....*....|...
gi 242117955 281 SRDDVIGEAMVPL 293
Cdd:cd08377   74 KKPEFLGKVAIPL 86

C2 domain second repeat present in Synaptotagmin-like proteins; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176015 [Multi-domain] Cd Length: 105 Bit Score: 39.47 E-value: 5.21e-04

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 242117955 202 LVVTILEARGLPAVEGqTGSADPYVKMTiLPEKKHrvKTRVLRKTLEPAFDETFTF 257
Cdd:cd04050    2 LFVYLDSAKNLPLAKS-TKEPSPYVELT-VGKTTQ--KSKVKERTNNPVWEEGFTF 53

C2 domain present in Smad ubiquitination-related factor (Smurf)-like proteins; A single C2 domain is found in Smurf proteins, C2-WW-HECT-domain E3s, which play an important role in the downregulation of the TGF-beta signaling pathway. Smurf proteins also regulate cell shape, motility, and polarity by degrading small guanosine triphosphatases (GTPases). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have type-II topology.

Pssm-ID: 176028 [Multi-domain] Cd Length: 123 Bit Score: 39.60 E-value: 5.42e-04

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 204 VTILEARGLpAVEGQTGSADPYVKMTILPEKKHrvKTRVLRKTLEPAFDETFTFYGVPYSSLsdltlhfLVLSFD--RFS 281
Cdd:cd08382    4 LTVLCADGL-AKRDLFRLPDPFAVITVDGGQTH--STDVAKKTLDPKWNEHFDLTVGPSSII-------TIQVFDqkKFK 73

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|
gi 242117955 282 RDD--VIGEAMVPLAGVDP--STGRVHITQQITKRNMQCVSHGELLVSLS 327
Cdd:cd08382   74 KKDqgFLGCVRIRANAVLPlkDTGYQRLDLRKLKKSDNLSVRGKIVVSLS 123

C2 domain (first repeat) of Ras GTPase activating proteins (GAPs); RasGAPs suppress Ras function by enhancing the GTPase activity of Ras proteins resulting in the inactive GDP-bound form of Ras. In this way it can control cellular proliferation and differentiation. The proteins here all contain either a single C2 domain or two tandem C2 domains, a Ras-GAP domain, and a pleckstrin homology (PH)-like domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-I topology.

Pssm-ID: 176029 [Multi-domain] Cd Length: 117 Bit Score: 39.55 E-value: 5.61e-04

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPkldiTGLSANPY--VKLN---VFyghkriakkKTHVKkCTLNPVFNESFIYDVPaelLPDIS---IEF 406
Cdd:cd08383    2 LRLRILEAKNLP----SKGTRDPYctVSLDqveVA---------RTKTV-EKLNPFWGEEFVFDDP---PPDVTfftLSF 64

                         90       100
                 ....*....|....*....|....*..
gi 242117955 407 LVMdfDRTTKNQ-------ALGRLVLG 426
Cdd:cd08383   65 YNK--DKRSKDRdivigkvALSKLDLG 89

C2 domain third repeat in Munc13 (mammalian uncoordinated) proteins; C2-like domains are thought to be involved in phospholipid binding in a Ca2+ independent manner in both Unc13 and Munc13. Caenorabditis elegans Unc13 has a central domain with sequence similarity to PKC, which includes C1 and C2-related domains. Unc13 binds phorbol esters and DAG with high affinity in a phospholipid manner. Mutations in Unc13 results in abnormal neuronal connections and impairment in cholinergic neurotransmission in the nematode. Munc13 is the mammalian homolog which are expressed in the brain. There are 3 isoforms (Munc13-1, -2, -3) and are thought to play a role in neurotransmitter release and are hypothesized to be high-affinity receptors for phorbol esters. Unc13 and Munc13 contain both C1 and C2 domains. There are two C2 related domains present, one central and one at the carboxyl end. Munc13-1 contains a third C2-like domain. Munc13 interacts with syntaxin, synaptobrevin, and synaptotagmin suggesting a role for these as scaffolding proteins.C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the third C2 repeat, C2C, and has a type-II topology.

Pssm-ID: 176041 [Multi-domain] Cd Length: 120 Bit Score: 39.69 E-value: 5.90e-04

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 204 VTILEARGLpavEGQTGSA-DPYVKMTI----LPEKKHRVKTRVLRKTLEPAFDETFTFYGVPYSSLSDLTLHFLVLSFd 278
Cdd:cd08395    4 VKVVAANDL---KWQTTGMfRPFVEVNLigphLSDKKRKFATKSKNNNWSPKYNETFQFILGNEDDPESYELHICVKDY- 79

                         90
                 ....*....|....*.
gi 242117955 279 RFSRDD-VIGEAMVPL 293
Cdd:cd08395   80 CFARDDrLVGVTVLQL 95

C2 domain second repeat found in Multiple C2 domain and Transmembrane region Proteins (MCTP); plant subset; MCTPs are involved in Ca2+ signaling at the membrane. Plant-MCTPs are composed of a variable N-terminal sequence, four C2 domains, two transmembrane regions (TMRs), and a short C-terminal sequence. It is one of four protein classes that are anchored to membranes via a transmembrane region; the others being synaptotagmins, extended synaptotagmins, and ferlins. MCTPs are the only membrane-bound C2 domain proteins that contain two functional TMRs. MCTPs are unique in that they bind Ca2+ but not phospholipids. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-II topology.

Pssm-ID: 176024 [Multi-domain] Cd Length: 121 Bit Score: 39.22 E-value: 6.95e-04

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 242117955 202 LVVTILEARGLPAVEGqtgsaDPYVKMTILPekkHRVKTRVLRKTLEPAFDETFTF 257
Cdd:cd08378    2 LYVRVVKARGLPANSN-----DPVVEVKLGN---YKGSTKAIERTSNPEWNQVFAF 49

C2 domain third repeat found in Multiple C2 domain and Transmembrane region Proteins (MCTP); MCTPs are involved in Ca2+ signaling at the membrane. The cds in this family contain multiple C2 domains as well as a C-terminal PRT domain. It is one of four protein classes that are anchored to membranes via a transmembrane region; the others being synaptotagmins, extended synaptotagmins, and ferlins. MCTPs are the only membrane-bound C2 domain proteins that contain two functional TMRs. MCTPs are unique in that they bind Ca2+ but not phospholipids. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the third C2 repeat, C2C, and has a type-II topology.

Pssm-ID: 176023 [Multi-domain] Cd Length: 119 Bit Score: 38.82 E-value: 1.17e-03

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPKLDITGLSaNPYVKLNVfyGHKRIakkKTHVKKCTLNPVFNESF------IYDVpaellpdisIEFLV 408
Cdd:cd08377    3 LQVKVIRASGLAAADIGGKS-DPFCVLEL--VNARL---QTHTIYKTLNPEWNKIFtfpikdIHDV---------LEVTV 67

                         90
                 ....*....|....*.
gi 242117955 409 MDFDRTTKNQALGRLV 424
Cdd:cd08377   68 YDEDKDKKPEFLGKVA 83

C2 domain first repeat found in Multiple C2 domain and Transmembrane region Proteins (MCTP); MCTPs are involved in Ca2+ signaling at the membrane. MCTP is composed of a variable N-terminal sequence, three C2 domains, two transmembrane regions (TMRs), and a short C-terminal sequence. It is one of four protein classes that are anchored to membranes via a transmembrane region; the others being synaptotagmins, extended synaptotagmins, and ferlins. MCTPs are the only membrane-bound C2 domain proteins that contain two functional TMRs. MCTPs are unique in that they bind Ca2+ but not phospholipids. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-II topology.

Pssm-ID: 176007 [Multi-domain] Cd Length: 121 Bit Score: 38.41 E-value: 1.30e-03

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 334 RLSVVVLKAKHLPKLDITGLSaNPYVKLNvfYGHKRIAKKKTHVKkcTLNPVFNESFIydVPAEllpDISiEFLVM---D 410
Cdd:cd04042    1 QLDIHLKEGRNLAARDRGGTS-DPYVKFK--YGGKTVYKSKTIYK--NLNPVWDEKFT--LPIE---DVT-QPLYIkvfD 69

                         90
                 ....*....|..
gi 242117955 411 FDRTTKNQALGR 422
Cdd:cd04042   70 YDRGLTDDFMGS 81

C2 domain found in fungal Ingression 1 (Inn1) proteins; Saccharomyces cerevisiae Inn1 associates with the contractile actomyosin ring at the end of mitosis and is needed for cytokinesis. The C2 domain of Inn1, located at the N-terminus, is required for ingression of the plasma membrane. The C-terminus is relatively unstructured and contains eight PXXP motifs that are thought to mediate interaction of Inn1 with other proteins with SH3 domains in the cytokinesis proteins Hof1 (an F-BAR protein) and Cyk3 (whose overexpression can restore primary septum formation in Inn1Delta cells) as well as recruiting Inn1 to the bud-neck by binding to Cyk3. Inn1 and Cyk3 appear to cooperate in activating chitin synthase Chs2 for primary septum formation, which allows coordination of actomyosin ring contraction with ingression of the cleavage furrow. It is thought that the C2 domain of Inn1 helps to preserve the link between the actomyosin ring and the plasma membrane, contributing both to membrane ingression, as well as to stability of the contracting ring. Additionally, Inn1 might induce curvature of the plasma membrane adjacent to the contracting ring, thereby promoting ingression of the membrane. It has been shown that the C2 domain of human synaptotagmin induces curvature in target membranes and thereby contributes to fusion of these membranes with synaptic vesicles. The C2 domain was first identified in PKC. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176063 [Multi-domain] Cd Length: 118 Bit Score: 38.38 E-value: 1.34e-03

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 242117955 335 LSVVVLKAKHLP---KLDitglSANPYVKLnvfyghkRIA--KKKTHV-KKCTLNPVFNESFIYDVPAE 397
Cdd:cd08681    3 LVVVVLKARNLPnkrKLD----KQDPYCVL-------RIGgvTKKTKTdFRGGQHPEWDEELRFEITED 60

C2 domain third repeat present in Tricalbin-like proteins; 5 to 6 copies of the C2 domain are present in Tricalbin, a yeast homolog of Synaptotagmin, which is involved in membrane trafficking and sorting. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the third C2 repeat, C2C, and has a type-II topology.

Pssm-ID: 176010 [Multi-domain] Cd Length: 120 Bit Score: 38.34 E-value: 1.50e-03

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 339 VLKAKHLPKLDITGLSaNPYVKLNVfyghKRIAKKKTHVKKCTLNPVFNESfIYdVP-AELLPDISIEflVMDFDRTTKN 417
Cdd:cd04045    7 IRKANDLKNLEGVGKI-DPYVRVLV----NGIVKGRTVTISNTLNPVWDEV-LY-VPvTSPNQKITLE--VMDYEKVGKD 77


                 ....
gi 242117955 418 QALG 421
Cdd:cd04045   78 RSLG 81

C2 domain second repeat present in Synaptotagmins 14 and 16; Synaptotagmin 14 and 16 are membrane-trafficking proteins in specific tissues outside the brain. Both of these contain C-terminal tandem C2 repeats, but only Synaptotagmin 14 has an N-terminal transmembrane domain and a putative fatty-acylation site. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium and this is indeed the case here. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176053 [Multi-domain] Cd Length: 138 Bit Score: 38.50 E-value: 1.87e-03

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 242117955 223 DPYVKMTILPEKKH---RVKTRVLRKTLEPAFDETFTFYgVPYSSLSDLTLHFLVLSFDRFSRDDVIG 287
Cdd:cd08408   37 DTYVKLTLLNSDGQeisKSKTSIRRGQPDPEFKETFVFQ-VALFQLSEVTLMFSVYNKRKMKRKEMIG 103

C2 domain first repeat; fungal group; C2 domains were first identified in Protein Kinase C (PKC). C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 176006 [Multi-domain] Cd Length: 111 Bit Score: 38.01 E-value: 2.00e-03

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPKLDITGLSANPYVKLnvfyGHKRIAKK--KTHVKKCTLNPVFNES-FIYDVPAELLPDISIEFLVMDF 411
Cdd:cd04041    3 LVVTIHRATDLPKADFGTGSSDPYVTA----SFAKFGKPlySTRIIRKDLNPVWEETwFVLVTPDEVKAGERLSCRLWDS 78

                         90
                 ....*....|.
gi 242117955 412 DRTTKNQALGR 422
Cdd:cd04041   79 DRFTADDRLGR 89

C2 domain first repeat in Munc13 (mammalian uncoordinated)-like proteins; C2-like domains are thought to be involved in phospholipid binding in a Ca2+ independent manner in both Unc13 and Munc13. Caenorabditis elegans Unc13 has a central domain with sequence similarity to PKC, which includes C1 and C2-related domains. Unc13 binds phorbol esters and DAG with high affinity in a phospholipid manner. Mutations in Unc13 results in abnormal neuronal connections and impairment in cholinergic neurotransmission in the nematode. Munc13 is the mammalian homolog which are expressed in the brain. There are 3 isoforms (Munc13-1, -2, -3) and are thought to play a role in neurotransmitter release and are hypothesized to be high-affinity receptors for phorbol esters. Unc13 and Munc13 contain both C1 and C2 domains. There are two C2 related domains present, one central and one at the carboxyl end. Munc13-1 contains a third C2-like domain. Munc13 interacts with syntaxin, synaptobrevin, and synaptotagmin suggesting a role for these as scaffolding proteins. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-II topology.

Pssm-ID: 176058 [Multi-domain] Cd Length: 153 Bit Score: 38.51 E-value: 2.17e-03

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 198 PKKALVVTILEARGLPAvEGQTGSADPYVKMTILP------------EKKHRVK--------------TRVLRKTLEPAF 251
Cdd:cd08676   26 PIFVLKVTVIEAKGLLA-KDVNGFSDPYCMLGIVPasrernsekskkRKSHRKKavlkdtvpaksikvTEVKPQTLNPVW 104

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|
gi 242117955 252 DETFTFYgvpYSSLSDLTLHFLVLSFDrfsrDDVIGEAMVPLaGVDPSTG 301
Cdd:cd08676  105 NETFRFE---VEDVSNDQLHLDIWDHD----DDFLGCVNIPL-KDLPSCG 146

C2 domain present in E3 ubiquitin ligase; E3 ubiquitin ligase is part of the ubiquitylation mechanism responsible for controlling surface expression of membrane proteins. The sequential action of several enzymes are involved: ubiquitin-activating enzyme E1, ubiquitin-conjugating enzyme E2, and ubiquitin-protein ligase E3 which is responsible for substrate recognition and promoting the transfer of ubiquitin to the target protein. E3 ubiquitin ligase is composed of an N-terminal C2 domain, 4 WW domains, and a HECTc domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions.

Pssm-ID: 175988 [Multi-domain] Cd Length: 125 Bit Score: 38.03 E-value: 2.21e-03

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 332 SHRLSVVVLKAKhlPKLDITGLSANPYVKLNVfyghKRIAKKKTHVKKCTLNPVFNESFIYDVPaellPDISIEFLVMDF 411
Cdd:cd04021    1 KSQLQITVESAK--LKSNSKSFKPDPYVEVTV----DGQPPKKTEVSKKTSNPKWNEHFTVLVT----PQSTLEFKVWSH 70

                         90
                 ....*....|
gi 242117955 412 DRTTKNQALG 421
Cdd:cd04021   71 HTLKADVLLG 80

C2 domain; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 13, a member of class 6 synaptotagmins, is located in the brain. It functions are unknown. It, like synaptotagmins 8 and 12, does not have any consensus Ca2+ binding sites. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This CD contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176059 Cd Length: 118 Bit Score: 37.58 E-value: 2.50e-03

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 189 LSIAIDYNFPKKALVVTILEARGLpaveGQTGSADPYVKMTIL--PEKKH---RVKTRVLRKTLEPAFDETFTFYGVPYS 263
Cdd:cd08677    3 LHYSLSYDKQKAELHVNILEAENI----SVDAGCECYISGCVSvsEGQKEaqtALKKLALHTQWEEELVFPLPEEESLDG 78

                         90       100       110
                 ....*....|....*....|....*....|...
gi 242117955 264 SLSdLTLHflvlSFDRFSRDDVIGEAMVPLAGV 296
Cdd:cd08677   79 TLT-LTLR----CCDRFSRHSTLGELRLKLADV 106

C2 domain in Protein Kinase C (PKC) epsilon; A single C2 domain is found in PKC epsilon. The PKC family of serine/threonine kinases regulates apoptosis, proliferation, migration, motility, chemo-resistance, and differentiation. There are 3 groups: group 1 (alpha, betaI, beta II, gamma) which require phospholipids and calcium, group 2 (delta, epsilon, theta, eta) which do not require calcium for activation, and group 3 (xi, iota/lambda) which are atypical and can be activated in the absence of diacylglycerol and calcium. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. Members here have a type-II topology.

Pssm-ID: 175981 [Multi-domain] Cd Length: 132 Bit Score: 37.64 E-value: 3.45e-03

                         10        20        30
                 ....*....|....*....|....*....|....*...
gi 242117955 357 PYVKLNVfyGHKRIAKkkTHVKKCTLNPVFNESFIYDV 394
Cdd:cd04014   37 PYVSIDV--DDTHIGK--TSTKPKTNSPVWNEEFTTEV 70

C2 domain first repeat present in RasA1 and RasA4; Rasal1 and RasA4 are both members of GAP1 (GTPase activating protein 1). Rasal1 responds to repetitive Ca2+ signals by associating with the plasma membrane and deactivating Ras. RasA4 suppresses Ras function by enhancing the GTPase activity of Ras proteins resulting in the inactive GDP-bound form of Ras. In this way it can control cellular proliferation and differentiation. Both of these proteins contains two C2 domains, a Ras-GAP domain, a plextrin homology (PH)-like domain, and a Bruton's Tyrosine Kinase (BTK) zinc binding domain. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176018 [Multi-domain] Cd Length: 121 Bit Score: 37.11 E-value: 4.23e-03

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 335 LSVVVLKAKHLPKLDITGlSANPYVKLNVfyGHKRIAKKKTHVKkcTLNPVFNESFIYDVPAELLpdiSIEFLVMDFDRT 414
Cdd:cd04054    2 LYIRIVEGKNLPAKDITG-SSDPYCIVKV--DNEVIIRTATVWK--TLNPFWGEEYTVHLPPGFH---TVSFYVLDEDTL 73

                         90       100
                 ....*....|....*....|....*.
gi 242117955 415 TKNQALGRLVLGAD--SPCPSGAAHW 438
Cdd:cd04054   74 SRDDVIGKVSLTREviSAHPRGIDGW 99

C2 domain first and third repeat in Synaptotagmin-like proteins; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains either the first or third repeat in Synaptotagmin-like proteins with a type-I topology.

Pssm-ID: 176037 [Multi-domain] Cd Length: 121 Bit Score: 36.50 E-value: 6.23e-03

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 202 LVVTILEARGLPA----VEG-QTGSADPYVKMTILPEKkhrVKTRVLRKTLEPAFDETFTfygVPYSSLSDLTLHFLVLS 276
Cdd:cd08391    3 LRIHVIEAQDLVAkdkfVGGlVKGKSDPYVIVRVGAQT---FKSKVIKENLNPKWNEVYE---AVVDEVPGQELEIELFD 76

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|..
gi 242117955 277 FDRfSRDDVIGEAMVPLAGV-------------DPSTGRVHI 305
Cdd:cd08391   77 EDP-DKDDFLGRLSIDLGSVekkgfidewlpleDVKSGRLHL 117

C2 domain second repeat in Munc13 (mammalian uncoordinated) proteins; C2-like domains are thought to be involved in phospholipid binding in a Ca2+ independent manner in both Unc13 and Munc13. Caenorabditis elegans Unc13 has a central domain with sequence similarity to PKC, which includes C1 and C2-related domains. Unc13 binds phorbol esters and DAG with high affinity in a phospholipid manner. Mutations in Unc13 results in abnormal neuronal connections and impairment in cholinergic neurotransmission in the nematode. Munc13 is the mammalian homolog which are expressed in the brain. There are 3 isoforms (Munc13-1, -2, -3) and are thought to play a role in neurotransmitter release and are hypothesized to be high-affinity receptors for phorbol esters. Unc13 and Munc13 contain both C1 and C2 domains. There are two C2 related domains present, one central and one at the carboxyl end. Munc13-1 contains a third C2-like domain. Munc13 interacts with syntaxin, synaptobrevin, and synaptotagmin suggesting a role for these as scaffolding proteins. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-II topology.

Pssm-ID: 175993 [Multi-domain] Cd Length: 127 Bit Score: 36.78 E-value: 6.89e-03

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 334 RLSVVVLKAKHLPKLDITGLSaNPYVKLNVfyGHkriAKKKTHVKKCTLNPVFNESFIYD 393
Cdd:cd04027    2 KISITVVCAQGLIAKDKTGTS-DPYVTVQV--GK---TKKRTKTIPQNLNPVWNEKFHFE 55

C2 domain; Synaptotagmin is a membrane-trafficking protein characterized by a N-terminal transmembrane region, a linker, and 2 C-terminal C2 domains. Synaptotagmin 13, a member of class 6 synaptotagmins, is located in the brain. It functions are unknown. It, like synaptotagmins 8 and 12, does not have any consensus Ca2+ binding sites. Previously all synaptotagmins were thought to be calcium sensors in the regulation of neurotransmitter release and hormone secretion, but it has been shown that not all of them bind calcium. Of the 17 identified synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10). The function of the two C2 domains that bind calcium are: regulating the fusion step of synaptic vesicle exocytosis (C2A) and binding to phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the absence of calcium ions and to phosphatidylinositol bisphosphate (PIP2) in their presence (C2B). C2B also regulates also the recycling step of synaptic vesicles. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This CD contains the first C2 repeat, C2A, and has a type-I topology.

Pssm-ID: 176059 Cd Length: 118 Bit Score: 36.43 E-value: 7.28e-03

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 321 ELLVSLSYQPVSHRLSVVVLKAKHLpKLDiTGLSANPYVKLNVFYGHKriaKKKTHVKKCTLNPVFNESFIYDVPAELLP 400
Cdd:cd08677    2 KLHYSLSYDKQKAELHVNILEAENI-SVD-AGCECYISGCVSVSEGQK---EAQTALKKLALHTQWEEELVFPLPEEESL 76

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|..
gi 242117955 401 DISIEFLVMDFDRTTKNQALGRLVLG-ADSPCPSGAAHWQEV 441
Cdd:cd08677   77 DGTLTLTLRCCDRFSRHSTLGELRLKlADVSMMLGAAQWVDL 118

C2 domain second repeat in Copine; There are 2 copies of the C2 domain present in copine, a protein involved in membrane trafficking, protein-protein interactions, and perhaps even cell division and growth. C2 domains fold into an 8-standed beta-sandwich that can adopt 2 structural arrangements: Type I and Type II, distinguished by a circular permutation involving their N- and C-terminal beta strands. Many C2 domains are Ca2+-dependent membrane-targeting modules that bind a wide variety of substances including bind phospholipids, inositol polyphosphates, and intracellular proteins. Most C2 domain proteins are either signal transduction enzymes that contain a single C2 domain, such as protein kinase C, or membrane trafficking proteins which contain at least two C2 domains, such as synaptotagmin 1. However, there are a few exceptions to this including RIM isoforms and some splice variants of piccolo/aczonin and intersectin which only have a single C2 domain. C2 domains with a calcium binding region have negatively charged residues, primarily aspartates, that serve as ligands for calcium ions. This cd contains the second C2 repeat, C2B, and has a type-I topology.

Pssm-ID: 176012 [Multi-domain] Cd Length: 110 Bit Score: 36.00 E-value: 9.04e-03

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 242117955 340 LKAKHLPKLDITGLSaNPYVKL-NVFYGHKRIAKKKTHVKKCTLNPVFNEsfiYDVPAELL----PDISIEFLVMDFDRT 414
Cdd:cd04047    7 FSGKKLDKKDFFGKS-DPFLEIsRQSEDGTWVLVYRTEVIKNTLNPVWKP---FTIPLQKLcngdYDRPIKIEVYDYDSS 82


                 ....*..
gi 242117955 415 TKNQALG 421
Cdd:cd04047   83 GKHDLIG 89