Ca2+-dependent activator protein (also called CAPS) Pleckstrin homology (PH) domain; CADPS/CAPS consists of two members, CAPS1 which regulates catecholamine release from neuroendocrine cells and CAPS2 which is involved in the release of two neurotrophins, brain-derived neurotrophic factor (BDNF) and neurotrophin-3 (NT-3) from cerebellar granule cells. CADPS plays an important role in vesicle exocytosis in neurons and endocrine cells where it functions to prime the exocytic machinery for Ca2+-triggered fusion. Priming involves the assembly of trans SNARE complexes. The initial interaction of vesicles with target membranes is mediated by diverse stage-specific tethering factors or multi-subunit tethering complexes. CADPS and Munc13 proteins are proposed to be the functional homologs of the stage-specific tethering factors that prime membrane fusion. Interestingly, regions in the C-terminal half of CADPS are similar to the C-terminal region of Munc13-1 that was reported to bind syntaxin-1. CADPS has independent interactions with each of the SNARE proteins (Q-SNARE and R-SNARE) required for vesicle fusion. CADPS interacts with Q-SNARE proteins syntaxin-1 (H3 SNARE) and SNAP-25 (SN1) and might promote Q-SNARE heterodimer formation. Through its N-terminal R-SNARE VAMP-2 interactions, CADPS bound to heterodimeric Q-SNARE complexes could be involved in catalyzing the zippering of VAMP-2 into recipient complexes. It also contains a central PH domain that binds to phosphoinositide 4,5 bisphosphate containing liposomes. Membrane association may also be mediated by binding to phosphatidlyserine via general electrostatic interactions. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 341940560  513 RMDKPQNMKHSGYLWTIGKNVWKRWKKRFFVLVQVSQYTFAMCSYREKKAEPQELLQLDGYTVDYTDPQP--GLEGGRAF 590
Cdd:cd01234     1 RMDKPQNMKHCGYLYALGKSVWKKWKKRYFVLVQVSQYTFAMCSYREKKSEPQEMMQLDGYTVDYTDPQPdlGLEGGRFF 80

                          90       100       110       120
                  ....*....|....*....|....*....|....*....|..
gi 341940560  591 FNAVKEGDTVIFASDDEQDRILWVQAMYRATGQSHKPVPPTQ 632
Cdd:cd01234    81 FNAVKEGDSVIFASDDENDRQLWVQALYRATGQSHKPVPPTQ 122

Ca2+-dependent activator protein (also called CAPS) Pleckstrin homology (PH) domain; CADPS/CAPS consists of two members, CAPS1 which regulates catecholamine release from neuroendocrine cells and CAPS2 which is involved in the release of two neurotrophins, brain-derived neurotrophic factor (BDNF) and neurotrophin-3 (NT-3) from cerebellar granule cells. CADPS plays an important role in vesicle exocytosis in neurons and endocrine cells where it functions to prime the exocytic machinery for Ca2+-triggered fusion. Priming involves the assembly of trans SNARE complexes. The initial interaction of vesicles with target membranes is mediated by diverse stage-specific tethering factors or multi-subunit tethering complexes. CADPS and Munc13 proteins are proposed to be the functional homologs of the stage-specific tethering factors that prime membrane fusion. Interestingly, regions in the C-terminal half of CADPS are similar to the C-terminal region of Munc13-1 that was reported to bind syntaxin-1. CADPS has independent interactions with each of the SNARE proteins (Q-SNARE and R-SNARE) required for vesicle fusion. CADPS interacts with Q-SNARE proteins syntaxin-1 (H3 SNARE) and SNAP-25 (SN1) and might promote Q-SNARE heterodimer formation. Through its N-terminal R-SNARE VAMP-2 interactions, CADPS bound to heterodimeric Q-SNARE complexes could be involved in catalyzing the zippering of VAMP-2 into recipient complexes. It also contains a central PH domain that binds to phosphoinositide 4,5 bisphosphate containing liposomes. Membrane association may also be mediated by binding to phosphatidlyserine via general electrostatic interactions. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 341940560  513 RMDKPQNMKHSGYLWTIGKNVWKRWKKRFFVLVQVSQYTFAMCSYREKKAEPQELLQLDGYTVDYTDPQP--GLEGGRAF 590
Cdd:cd01234     1 RMDKPQNMKHCGYLYALGKSVWKKWKKRYFVLVQVSQYTFAMCSYREKKSEPQEMMQLDGYTVDYTDPQPdlGLEGGRFF 80

                          90       100       110       120
                  ....*....|....*....|....*....|....*....|..
gi 341940560  591 FNAVKEGDTVIFASDDEQDRILWVQAMYRATGQSHKPVPPTQ 632
Cdd:cd01234    81 FNAVKEGDSVIFASDDENDRQLWVQALYRATGQSHKPVPPTQ 122

PH domain; PH stands for pleckstrin homology.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 341940560   521 KHSGYLWTIGKNVWKRWKKRFFVLVQVSQYTFAmCSYREKKAEPQELLQLDGYTVDYTDPQPglEGGRAF-----FNAVK 595
Cdd:pfam00169    2 VKEGWLLKKGGGKKKSWKKRYFVLFDGSLLYYK-DDKSGKSKEPKGSISLSGCEVVEVVASD--SPKRKFcfelrTGERT 78

                           90       100
                   ....*....|....*....|....*
gi 341940560   596 EGDTVIFASDDEQDRILWVQAMYRA 620
Cdd:pfam00169   79 GKRTYLLQAESEEERKDWIKAIQSA 103

Ca2+-dependent activator protein (also called CAPS) Pleckstrin homology (PH) domain; CADPS/CAPS consists of two members, CAPS1 which regulates catecholamine release from neuroendocrine cells and CAPS2 which is involved in the release of two neurotrophins, brain-derived neurotrophic factor (BDNF) and neurotrophin-3 (NT-3) from cerebellar granule cells. CADPS plays an important role in vesicle exocytosis in neurons and endocrine cells where it functions to prime the exocytic machinery for Ca2+-triggered fusion. Priming involves the assembly of trans SNARE complexes. The initial interaction of vesicles with target membranes is mediated by diverse stage-specific tethering factors or multi-subunit tethering complexes. CADPS and Munc13 proteins are proposed to be the functional homologs of the stage-specific tethering factors that prime membrane fusion. Interestingly, regions in the C-terminal half of CADPS are similar to the C-terminal region of Munc13-1 that was reported to bind syntaxin-1. CADPS has independent interactions with each of the SNARE proteins (Q-SNARE and R-SNARE) required for vesicle fusion. CADPS interacts with Q-SNARE proteins syntaxin-1 (H3 SNARE) and SNAP-25 (SN1) and might promote Q-SNARE heterodimer formation. Through its N-terminal R-SNARE VAMP-2 interactions, CADPS bound to heterodimeric Q-SNARE complexes could be involved in catalyzing the zippering of VAMP-2 into recipient complexes. It also contains a central PH domain that binds to phosphoinositide 4,5 bisphosphate containing liposomes. Membrane association may also be mediated by binding to phosphatidlyserine via general electrostatic interactions. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 341940560  513 RMDKPQNMKHSGYLWTIGKNVWKRWKKRFFVLVQVSQYTFAMCSYREKKAEPQELLQLDGYTVDYTDPQP--GLEGGRAF 590
Cdd:cd01234     1 RMDKPQNMKHCGYLYALGKSVWKKWKKRYFVLVQVSQYTFAMCSYREKKSEPQEMMQLDGYTVDYTDPQPdlGLEGGRFF 80

                          90       100       110       120
                  ....*....|....*....|....*....|....*....|..
gi 341940560  591 FNAVKEGDTVIFASDDEQDRILWVQAMYRATGQSHKPVPPTQ 632
Cdd:cd01234    81 FNAVKEGDSVIFASDDENDRQLWVQALYRATGQSHKPVPPTQ 122

PH domain; PH stands for pleckstrin homology.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 341940560   521 KHSGYLWTIGKNVWKRWKKRFFVLVQVSQYTFAmCSYREKKAEPQELLQLDGYTVDYTDPQPglEGGRAF-----FNAVK 595
Cdd:pfam00169    2 VKEGWLLKKGGGKKKSWKKRYFVLFDGSLLYYK-DDKSGKSKEPKGSISLSGCEVVEVVASD--SPKRKFcfelrTGERT 78

                           90       100
                   ....*....|....*....|....*
gi 341940560   596 EGDTVIFASDDEQDRILWVQAMYRA 620
Cdd:pfam00169   79 GKRTYLLQAESEEERKDWIKAIQSA 103

Pleckstrin homology (PH) domain; PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 341940560  522 HSGYLWTIGKNVWKRWKKRFFVLvqvSQYTFAMCSYR-EKKAEPQELLQLDGyTVDYTDPQPGlEGGRAFFNAVKEGDTV 600
Cdd:cd00821     1 KEGYLLKRGGGGLKSWKKRWFVL---FEGVLLYYKSKkDSSYKPKGSIPLSG-ILEVEEVSPK-ERPHCFELVTPDGRTY 75

                          90
                  ....*....|....*..
gi 341940560  601 IFASDDEQDRILWVQAM 617
Cdd:cd00821    76 YLQADSEEERQEWLKAL 92

Switch-associated protein-70 Pleckstrin homology (PH) domain; SWAP-70 (also called Differentially expressed in FDCP 6/DEF-6 or IRF4-binding protein) functions in cellular signal transduction pathways (in conjunction with Rac), regulates cell motility through actin rearrangement, and contributes to the transformation and invasion activity of mouse embryo fibroblasts. Metazoan SWAP-70 is found in B lymphocytes, mast cells, and in a variety of organs. Metazoan SWAP-70 contains an N-terminal EF-hand motif, a centrally located PH domain, and a C-terminal coiled-coil domain. The PH domain of Metazoan SWAP-70 contains a phosphoinositide-binding site and a nuclear localization signal (NLS), which localize SWAP-70 to the plasma membrane and nucleus, respectively. The NLS is a sequence of four Lys residues located at the N-terminus of the C-terminal a-helix; this is a unique characteristic of the Metazoan SWAP-70 PH domain. The SWAP-70 PH domain binds PtdIns(3,4,5)P3 and PtdIns(4,5)P2 embedded in lipid bilayer vesicles. There are additional plant SWAP70 proteins, but these are not included in this hierarchy. Rice SWAP70 (OsSWAP70) exhibits GEF activity toward the its Rho GTPase, OsRac1, and regulates chitin-induced production of reactive oxygen species and defense gene expression in rice. Arabidopsis SWAP70 (AtSWAP70) plays a role in both PAMP- and effector-triggered immunity. Plant SWAP70 contains both DH and PH domains, but their arrangement is the reverse of that in typical DH-PH-type Rho GEFs, wherein the DH domain is flanked by a C-terminal PH domain. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 341940560  524 GYLWTIGkNVWKRWKKRFFVL--VQVSQYTFAMCsyREKKAEpqelLQLDGYTVdyTDPQPGLEGGRAFFnAVKEGDTV- 600
Cdd:cd13273    12 GYLWKKG-HLLPTWTERWFVLkpNSLSYYKSEDL--KEKKGE----IALDSNCC--VESLPDREGKKCRF-LVKTPDKTy 81

                          90       100
                  ....*....|....*....|.
gi 341940560  601 -IFASDDEQdRILWVQAMYRA 620
Cdd:cd13273    82 eLSASDHKT-RQEWIAAIQTA 101

Boi family Pleckstrin homology domain; Yeast Boi proteins Boi1 and Boi2 are functionally redundant and important for cell growth with Boi mutants displaying defects in bud formation and in the maintenance of cell polarity.They appear to be linked to Rho-type GTPase, Cdc42 and Rho3. Boi1 and Boi2 display two-hybrid interactions with the GTP-bound ("active") form of Cdc42, while Rho3 can suppress of the lethality caused by deletion of Boi1 and Boi2. These findings suggest that Boi1 and Boi2 are targets of Cdc42 that promote cell growth in a manner that is regulated by Rho3. Boi proteins contain a N-terminal SH3 domain, followed by a SAM (sterile alpha motif) domain, a proline-rich region, which mediates binding to the second SH3 domain of Bem1, and C-terminal PH domain. The PH domain is essential for its function in cell growth and is important for localization to the bud, while the SH3 domain is needed for localization to the neck. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 341940560  522 HSGYLWTIGKNvWKRWKKRFFVLVQVSQYTFamcsYREKKAEPQELLQLDGYTVdYTDPQPGLEGGRAFFNAV--KEGDT 599
Cdd:cd13316     2 HSGWMKKRGER-YGTWKTRYFVLKGTRLYYL----KSENDDKEKGLIDLTGHRV-VPDDSNSPFRGSYGFKLVppAVPKV 75

                          90       100
                  ....*....|....*....|..
gi 341940560  600 VIFASDDEQDRILWVQAMYRAT 621
Cdd:cd13316    76 HYFAVDEKEELREWMKALMKAT 97

Amyloid beta (A4) Precursor protein-Binding, family B, member 1 Interacting Protein pleckstrin homology (PH) domain; APBB1IP consists of a Ras-associated (RA) domain, a PH domain, a family-specific BPS region, and a C-terminal SH2 domain. Grb7, Grb10 and Grb14 are paralogs that are also present in this hierarchy. These adapter proteins bind a variety of receptor tyrosine kinases, including the insulin and insulin-like growth factor-1 (IGF1) receptors. Grb10 and Grb14 are important tissue-specific negative regulators of insulin and IGF1 signaling based and may contribute to type 2 (non-insulin-dependent) diabetes in humans. RA-PH function as a single structural unit and is dimerized via a helical extension of the PH domain. The PH domain here are proposed to bind phosphoinositides non-cannonically ahd are unlikely to bind an activated GTPase. The tandem RA-PH domains are present in a second adapter-protein family, MRL proteins, Caenorhabditis elegans protein MIG-1012, the mammalian proteins RIAM and lamellipodin and the Drosophila melanogaster protein Pico12, all of which are Ena/VASP-binding proteins involved in actin-cytoskeleton rearrangement. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 341940560  522 HSGYLW--TIGKnvwKRWKKRFFVLVQVSQYTfamcSYREKKAEPQEL---LQLDGYTVdYTdpqpGLeGGRAFFNA--- 593
Cdd:cd01259     8 IEGFLYlkEDGK---KSWKKRYFVLRASGLYY----SPKGKSKESRDLqclAQFDDYNV-YT----GL-NGKKKYKAptd 74

                          90       100       110
                  ....*....|....*....|....*....|....*.
gi 341940560  594 ------------VKEGDTVIFASDDEQDRILWVQAM 617
Cdd:cd01259    75 fgfclkpnkqqeKGSKDIKYLCAEDEQSRTCWLTAI 110