CBS pair domain found in 5'-AMP (adenosine monophosphate)-activated protein kinase; The 5'-AMP (adenosine monophosphate)-activated protein kinase (AMPK) coordinates metabolic function with energy availability by responding to changes in intracellular ATP (adenosine triphosphate) and AMP concentrations. Most of the members of this cd contain two Bateman domains, each of which is composed of a tandem pair of cystathionine beta-synthase (CBS) motifs. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 189 TYHNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDITVTQALQHRSQYFEGVVKC 268
Cdd:cd04641    1 TYENIATASMDTPVIDALNLFVERRVSALPIVDEDGRVVDIYAKFDVINLAAEKTYNNLDLTVGEALQHRSEDFEGVHTC 80

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....
gi 282847331 269 SKLETLETIVDRIVRAEVHRLVVVNEADSIVGIISLSDILQALI 312
Cdd:cd04641   81 TLNDTLETIIDRIVKAEVHRLVVVDEEDRLEGIVSLSDILKYLV 124

CBS pair domain found in 5'-AMP (adenosine monophosphate)-activated protein kinase; The 5'-AMP (adenosine monophosphate)-activated protein kinase (AMPK) coordinates metabolic function with energy availability by responding to changes in intracellular ATP (adenosine triphosphate) and AMP concentrations. Most of the members of this cd contain two Bateman domains, each of which is composed of a tandem pair of cystathionine beta-synthase (CBS) motifs. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 189 TYHNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDITVTQALQHRSQYFEGVVKC 268
Cdd:cd04641    1 TYENIATASMDTPVIDALNLFVERRVSALPIVDEDGRVVDIYAKFDVINLAAEKTYNNLDLTVGEALQHRSEDFEGVHTC 80

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....
gi 282847331 269 SKLETLETIVDRIVRAEVHRLVVVNEADSIVGIISLSDILQALI 312
Cdd:cd04641   81 TLNDTLETIIDRIVKAEVHRLVVVDEEDRLEGIVSLSDILKYLV 124

CBS-domain-containing membrane protein [Signal transduction mechanisms];

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 116 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDPiSGNALYILTHKRILKFLQLFMSDMPKPAFMKQNLDELgigTYHNIAF 195
Cdd:COG3448   10 RDVVTVSPDTTLREALELMREHGIRGLPVVDE-DGRLVGIVTERDLLRALLPDRLDELEERLLDLPVEDV---MTRPVVT 85

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*.
gi 282847331 196 IHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAE 241
Cdd:COG3448   86 VTPDTPLEEAAELMLEHGIHRLPVVDDDGRLVGIVTRTDLLRALAR 131

CBS domain; CBS domains are small intracellular modules that pair together to form a stable globular domain. This family represents a single CBS domain. Pairs of these domains have been termed a Bateman domain. CBS domains have been shown to bind ligands with an adenosyl group such as AMP, ATP and S-AdoMet. CBS domains are found attached to a wide range of other protein domains suggesting that CBS domains may play a regulatory role making proteins sensitive to adenosyl carrying ligands. The region containing the CBS domains in Cystathionine-beta synthase is involved in regulation by S-AdoMet. CBS domain pairs from AMPK bind AMP or ATP. The CBS domains from IMPDH and the chloride channel CLC2 bind ATP.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|.
gi 282847331  191 HNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAE 241
Cdd:pfam00571   7 KDVVTVSPDTTLEEALELMREHGISRLPVVDEDGKLVGIVTLKDLLRALLG 57

CBS domain; CBS domains are small intracellular modules that pair together to form a stable globular domain. This family represents a single CBS domain. Pairs of these domains have been termed a Bateman domain. CBS domains have been shown to bind ligands with an adenosyl group such as AMP, ATP and S-AdoMet. CBS domains are found attached to a wide range of other protein domains suggesting that CBS domains may play a regulatory role making proteins sensitive to adenosyl carrying ligands. The region containing the CBS domains in Cystathionine-beta synthase is involved in regulation by S-AdoMet. CBS domain pairs from AMPK bind AMP or ATP. The CBS domains from IMPDH and the chloride channel CLC2 bind ATP.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|
gi 282847331  116 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDPiSGNALYILTHKRILKFL 165
Cdd:pfam00571   7 KDVVTVSPDTTLEEALELMREHGISRLPVVDE-DGKLVGIVTLKDLLRAL 55

CBS pair domain found in 5'-AMP (adenosine monophosphate)-activated protein kinase; The 5'-AMP (adenosine monophosphate)-activated protein kinase (AMPK) coordinates metabolic function with energy availability by responding to changes in intracellular ATP (adenosine triphosphate) and AMP concentrations. Most of the members of this cd contain two Bateman domains, each of which is composed of a tandem pair of cystathionine beta-synthase (CBS) motifs. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 189 TYHNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDITVTQALQHRSQYFEGVVKC 268
Cdd:cd04641    1 TYENIATASMDTPVIDALNLFVERRVSALPIVDEDGRVVDIYAKFDVINLAAEKTYNNLDLTVGEALQHRSEDFEGVHTC 80

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....
gi 282847331 269 SKLETLETIVDRIVRAEVHRLVVVNEADSIVGIISLSDILQALI 312
Cdd:cd04641   81 TLNDTLETIIDRIVKAEVHRLVVVDEEDRLEGIVSLSDILKYLV 124

CBS-domain-containing membrane protein [Signal transduction mechanisms];

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 191 HNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNL-----DITVTQALQHRsqyfegV 265
Cdd:COG3448   10 RDVVTVSPDTTLREALELMREHGIRGLPVVDEDGRLVGIVTERDLLRALLPDRLDELeerllDLPVEDVMTRP------V 83

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*..
gi 282847331 266 VKCSKLETLETIVDRIVRAEVHRLVVVNEADSIVGIISLSDILQALI 312
Cdd:COG3448   84 VTVTPDTPLEEAAELMLEHGIHRLPVVDDDGRLVGIVTRTDLLRALA 130

CBS-domain-containing membrane protein [Signal transduction mechanisms];

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 116 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDPiSGNALYILTHKRILKFLQLFMSDMPKPAFMKQNLDELgigTYHNIAF 195
Cdd:COG3448   10 RDVVTVSPDTTLREALELMREHGIRGLPVVDE-DGRLVGIVTERDLLRALLPDRLDELEERLLDLPVEDV---MTRPVVT 85

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*.
gi 282847331 196 IHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAE 241
Cdd:COG3448   86 VTPDTPLEEAAELMLEHGIHRLPVVDDDGRLVGIVTRTDLLRALAR 131

Signal-transduction protein containing cAMP-binding, CBS, and nucleotidyltransferase domains [Signal transduction mechanisms];

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 191 HNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDITVTQALQHRsqyfegVVKCSK 270
Cdd:COG2905    7 RDVVTVSPDATVREAARLMTEKGVGSLVVVDDDGRLVGIITDRDLRRRVLAEGLDPLDTPVSEVMTRP------PITVSP 80

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|..
gi 282847331 271 LETLETIVDRIVRAEVHRLVVVnEADSIVGIISLSDILQALI 312
Cdd:COG2905   81 DDSLAEALELMEEHRIRHLPVV-DDGKLVGIVSITDLLRALS 121

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with the ACT domain; The putative Acetoin Utilization Protein (Acub) from Vibrio Cholerae contains a CBS pair domain. The acetoin utilization protein plays a role in growth and sporulation on acetoin or butanediol for use as a carbon source. Acetoin is an important physiological metabolite excreted by many microorganisms. It is used as an external energy store by a number of fermentive bacteria. Acetoin is produced by the decarboxylation of alpha-acetolactate. Once superior carbon sources are exhausted, and the culture enters stationary phase, acetoin can be utilised in order to maintain the culture density. The conversion of acetoin into acetyl-CoA or 2,3-butanediol is catalysed by the acetoin dehydrogenase complex and acetoin reductase/2,3-butanediol dehydrogenase, respectively. Acetoin utilization proteins, acetylpolyamine amidohydrolases, and histone deacetylases are members of an ancient protein superfamily.This cd contains two tandem repeats of the cystathionine beta-synthase (CBS pair) domains in the acetoin utilization proteins in bacteria. Acetoin is a product of fermentative metabolism in many prokaryotic and eukaryotic microorganisms. They produce acetoin as an external carbon storage compound and then later reuse it as a carbon and energy source during their stationary phase and sporulation. In addition these CBS domains are associated with a downstream ACT (aspartate kinase/chorismate mutase/TyrA) domain, which is linked to a wide range of metabolic enzymes that are regulated by amino acid concentration. Pairs of ACT domains bind specifically to a particular amino acid leading to regulation of the linked enzyme. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 116 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDpisGNALY-ILTHKRILKFLqlfMSDMPKPAFMKQNLDELGIgTYHNI- 193
Cdd:cd04584    8 KNVVTVTPDTSLAEARELMKEHKIRHLPVVD---DGKLVgIVTDRDLLRAS---PSKATSLSIYELNYLLSKI-PVKDIm 80

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|
gi 282847331 194 ----AFIHPDTPIIKALNIFVERRISALPVVDEsGKVVDIYSKFDVINLA 239
Cdd:cd04584   81 tkdvITVSPDDTVEEAALLMLENKIGCLPVVDG-GKLVGIITETDILRAF 129

Predicted transcriptional regulator, contains C-terminal CBS domains [Transcription];

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 116 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDpiSGNALYILTHKRILKFLQLFMSDMPKPA--FMKQNLdelgigtyhni 193
Cdd:COG2524   94 KDVITVSPDTTLEEALELMLEKGISGLPVVD--DGKLVGIITERDLLKALAEGRDLLDAPVsdIMTRDV----------- 160

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....
gi 282847331 194 AFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVIN 237
Cdd:COG2524  161 VTVSEDDSLEEALRLMLEHGIGRLPVVDDDGKLVGIITRTDILR 204

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains present in archaea, repeat 2; The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 196 IHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNN------------LDITVtqalqhRSQYFE 263
Cdd:cd04632    7 VNEDDTIGKAINLLREHGISRLPVVDDNGKLVGIVTTYDIVDFVVRPGTKTrggdrggekermLDLPV------YDIMSS 80

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*..
gi 282847331 264 GVVKCSKLETLETIVDRIVRAEVHRLVVVNEADSIVGIISLSDILQA 310
Cdd:cd04632   81 PVVTVTRDATVADAVERMLENDISGLVVTPDDNMVIGILTKTDVLRA 127

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains; The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 192 NIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTynNLDITVTQALqhrsqyFEGVVKCSKL 271
Cdd:cd09836    4 PVVTVPPETTIREAAKLMAENNIGSVVVVDDDGKPVGIVTERDIVRAVAEGI--DLDTPVEEIM------TKNLVTVSPD 75

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|
gi 282847331 272 ETLETIVDRIVRAEVHRLVVVNEADSIVGIISLSDILQAL 311
Cdd:cd09836   76 ESIYEAAELMREHNIRHLPVVDGGGKLVGVISIRDLAREL 115

CBS pair domain found in Hypoxic Response Protein 1 (HRP1) -like proteinds; Mycobacterium tuberculosis adapts to cellular stresses by upregulation of the dormancy survival regulon. Hypoxic response protein 1 (HRP1) is encoded by one of the most strongly upregulated genes in the dormancy survival regulon. HRP1 is a 'CBS-domain-only protein; however unlike other CBS containing proteins it does not appear to bind AMP. The biological function of the protein remains unclear, but is thought to contribute to the modulation of the host immune response. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 191 HNIAFIHPDTPIIKALNIFVERRISALPVVDEsGKVV------DIyskfdVIN-LAAEKTYNnlDITVTQALQHrsqyfe 263
Cdd:cd04622    3 RDVVTVSPDTTLREAARLMRDLDIGALPVCEG-DRLVgmvtdrDI-----VVRaVAEGKDPN--TTTVREVMTG------ 68

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....
gi 282847331 264 GVVKCSKLETLETIVDRIVRAEVHRLVVVNEADSIVGIISLSDI 307
Cdd:cd04622   69 DVVTCSPDDDVEEAARLMAEHQVRRLPVVDDDGRLVGIVSLGDL 112

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with the HPP motif domain; This cd contains two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with the HPP motif domain. These proteins are integral membrane proteins with four transmembrane spanning helices. The function of these proteins is uncertain, but they are thought to be transporters. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 196 IHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDITVTQALQHRSQyfegvvkcsKLETLE 275
Cdd:cd04600    8 VTPDTSLEEAWRLLRRHRIKALPVVDRARRLVGIVTLADLLKHADLDPPRGLRGRLRRTLGLRRD---------RPETVG 78

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|...
gi 282847331 276 TIVDRIVR-----------------AEVHRLVVVNEADSIVGIISLSDILQAL 311
Cdd:cd04600   79 DIMTRPVVtvrpdtpiaelvplfsdGGLHHIPVVDADGRLVGIVTQSDLIAAL 131

Signal-transduction protein containing cAMP-binding, CBS, and nucleotidyltransferase domains [Signal transduction mechanisms];

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 116 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDPiSGNALYILTHKRILKFLQLfmsdmpkpafMKQNLDELGIGTY--HNI 193
Cdd:COG2905    7 RDVVTVSPDATVREAARLMTEKGVGSLVVVDD-DGRLVGIITDRDLRRRVLA----------EGLDPLDTPVSEVmtRPP 75

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*...
gi 282847331 194 AFIHPDTPIIKALNIFVERRISALPVVDEsGKVVDIYSKFDVINLAAE 241
Cdd:COG2905   76 ITVSPDDSLAEALELMEEHRIRHLPVVDD-GKLVGIVSITDLLRALSE 122

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains present in bacteria and eukaryotes; The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 191 HNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDITVTQALQHRsqyfegVVKCSK 270
Cdd:cd04623    2 RDVVTVSPDATVAEALRLLAEKNIGALVVVDDGGRLVGILSERDYVRKLALRGASSLDTPVSEIMTRD------VVTCTP 75

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|.
gi 282847331 271 ----LETLETIVDRIVRaevHRLVVvnEADSIVGIISLSDI 307
Cdd:cd04623   76 ddtvEECMALMTERRIR---HLPVV--EDGKLVGIVSIGDV 111

CBS domain; CBS domains are small intracellular modules that pair together to form a stable globular domain. This family represents a single CBS domain. Pairs of these domains have been termed a Bateman domain. CBS domains have been shown to bind ligands with an adenosyl group such as AMP, ATP and S-AdoMet. CBS domains are found attached to a wide range of other protein domains suggesting that CBS domains may play a regulatory role making proteins sensitive to adenosyl carrying ligands. The region containing the CBS domains in Cystathionine-beta synthase is involved in regulation by S-AdoMet. CBS domain pairs from AMPK bind AMP or ATP. The CBS domains from IMPDH and the chloride channel CLC2 bind ATP.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|.
gi 282847331  191 HNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAE 241
Cdd:pfam00571   7 KDVVTVSPDTTLEEALELMREHGISRLPVVDEDGKLVGIVTLKDLLRALLG 57

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains from plant CBSX proteins; This cd contains two tandem repeats of the cystathionine beta-synthase (CBS pair) domains of plant single cystathionine beta-synthase (CBS) pair proteins (CBSX). CBSX1 and CBSX2 have been identified as redox regulators of the thioredoxin (Trx) system. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 198 PDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAA----EKTYNNLDITVTQAlqhrsQYFEGVVKC----- 268
Cdd:cd17789   10 PNTTVDEALELLVENRITGLPVIDEDWRLVGVVSDYDLLALDSisgrSQTDNNFPPADSTW-----KTFNEVQKLlsktn 84

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 282847331 269 -SKLETLETIVDRIVRAE--------------VHRLVVVNEADSIVGIISLSDILQA 310
Cdd:cd17789   85 gKVVGDVMTPSPLVVREKtnledaarilletkFRRLPVVDSDGKLVGIITRGNVVRA 141

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with the BON (bacterial OsmY and nodulation domain) domain; This cd contains two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with the BON (bacterial OsmY and nodulation domain) domain. BON is a putative phospholipid-binding domain found in a family of osmotic shock protection proteins. It is also found in some secretins and a group of potential haemolysins. Its likely function is attachment to phospholipid membranes. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 116 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDpiSGNAL-------------YILTHKRILKFLQLFMSDMPKPAfmKQNL 182
Cdd:cd04586    3 TDVVTVTPDTSVREAARLLLEHRISGLPVVD--DDGKLvgivsegdllrreEPGTEPRRVWWLDALLESPERLA--EEYV 78

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*....
gi 282847331 183 DELG-----IGTyHNIAFIHPDTPIIKALNIFVERRISALPVVDEsGKVVDIYSKFDVI 236
Cdd:cd04586   79 KAHGrtvgdVMT-RPVVTVSPDTPLEEAARLMERHRIKRLPVVDD-GKLVGIVSRADLL 135

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains; The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 116 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDPiSGNALYILTHKRILKFLQLFMS-DMPKPAFMKQNLdelgIGTYhnia 194
Cdd:cd09836    3 KPVVTVPPETTIREAAKLMAENNIGSVVVVDD-DGKPVGIVTERDIVRAVAEGIDlDTPVEEIMTKNL----VTVS---- 73

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|...
gi 282847331 195 fihPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVIN 237
Cdd:cd09836   74 ---PDESIYEAAELMREHNIRHLPVVDGGGKLVGVISIRDLAR 113

CBS pair domains found in archeal 5'-AMP-activated protein kinase gamma subunit-like proteins; Archeal gamma-subunit of 5'-AMP-activated protein kinase (AMPK) contains four CBS domains in tandem repeats, similar to eukaryotic homologs. AMPK is an important regulator of metabolism and of energy homeostasis. It is a heterotrimeric protein composed of a catalytic serine/threonine kinase subunit (alpha) and two regulatory subunits (beta and gamma). The gamma subunit senses the intracellular energy status by competitively binding AMP and ATP and is believed to be responsible for allosteric regulation of the whole complex. In humans mutations in gamma- subunit of AMPK are associated with hypertrophic cardiomiopathy, Wolff-Parkinson-White syndrome and glycogen storage in the skeletal muscle. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 119 VNISPDASLFDAVYSLIKNKIHRLPVIDpiSGNALYILTHKRILKFL---QLFMS----------DMPKPAFMKQNldel 185
Cdd:cd04631   11 ITATPGTPIEDVAKIMVRNGFRRLPVVS--DGKLVGIVTSTDIMRYLgsgEAFEKlktgnihevlNVPISSIMKRD---- 84

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|..
gi 282847331 186 gigtyhnIAFIHPDTPIIKALNIFVERRISALPVVDEsGKVVDIYSKFDVIN 237
Cdd:cd04631   85 -------IITTTPDTDLGEAAELMLEKNIGALPVVDD-GKLVGIITERDILR 128

CBS pair domains found in archeal proteins, repeat 1; CBS pair domains found in archeal proteins that contain 2 repeats. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 116 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDpisGNALY-ILTHKRILKFLQLFMSDMPKPAFMKQNLDELG----IGTY 190
Cdd:cd17777   10 PPVLSISPSAPILSAFEKMNRRGIRRLVVVD---ENKLEgILSARDLVSYLGGGCLFKIVESRHQGDLYSALnrevVETI 86

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*...
gi 282847331 191 H--NIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVI 236
Cdd:cd17777   87 MtpNPVYVYEDSDLIEALTIMVTRGIGSLPVVDRDGRPVGIVTERDLV 134

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains in the inosine 5' monophosphate dehydrogenase (IMPDH) protein; This cd contains two tandem repeats of the cystathionine beta-synthase (CBS pair) domains in the inosine 5' monophosphate dehydrogenase (IMPDH) protein. IMPDH is an essential enzyme that catalyzes the first step unique to GTP synthesis, playing a key role in the regulation of cell proliferation and differentiation. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 195 FIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAaektynNLDITVtqalqhrSQY---FEGVVKCSKL 271
Cdd:cd04601    6 TLSPDATVADVLELKAEYGISGVPVTEDGGKLVGIVTSRDIRFET------DLSTPV-------SEVmtpDERLVTAPEG 72

                         90       100       110
                 ....*....|....*....|....*....|....*..
gi 282847331 272 ETLETIVDRIVRAEVHRLVVVNEADSIVGIISLSDIL 308
Cdd:cd04601   73 ITLEEAKEILHKHKIEKLPIVDDNGELVGLITRKDIE 109

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with the DHH and nucleotidyltransferase (NT) domains; This cd contains two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with an upstream DHH domain which performs a phosphoesterase function and a downstream nucleotidyltransferase (NT) domain of family X DNA polymerases. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 196 IHPDTPIIKALNIFVERRISALPVVDEsGKVVDIYSKFDVinlaaektynnlDITVTQALQH---RSQYFEGVVKCSKLE 272
Cdd:cd04595    7 VSPDTTIEEARKIMLRYGHTGLPVVED-GKLVGIISRRDV------------DKAKHHGLGHapvKGYMSTNVITIDPDT 73

                         90       100       110
                 ....*....|....*....|....*....|....*...
gi 282847331 273 TLETIVDRIVRAEVHRLVVVNEaDSIVGIISLSDILQA 310
Cdd:cd04595   74 SLEEAQELMVEHDIGRLPVVEE-GKLVGIVTRSDVLRY 110

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with the DHH and nucleotidyltransferase (NT) domains; This cd contains two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with an upstream DHH domain which performs a phosphoesterase function and a downstream nucleotidyltransferase (NT) domain of family X DNA polymerases. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 117 PLVNISPDASLFDAVYSLIKNKIHRLPVIDpiSGNALYILTHKRILKFLQLFMSDMPKPAFMKQNldelgigtyhnIAFI 196
Cdd:cd04595    3 PVKTVSPDTTIEEARKIMLRYGHTGLPVVE--DGKLVGIISRRDVDKAKHHGLGHAPVKGYMSTN-----------VITI 69

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|.
gi 282847331 197 HPDTPIIKALNIFVERRISALPVVDEsGKVVDIYSKFDVIN 237
Cdd:cd04595   70 DPDTSLEEAQELMVEHDIGRLPVVEE-GKLVGIVTRSDVLR 109

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with the MET2 domain; This cd contains two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with the MET2 domain. Met2 is a key enzyme in the biosynthesis of methionine. It encodes a homoserine transacetylase involved in converting homoserine to O-acetyl homoserine. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 116 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDPiSGNALYILTHKRILKFLqlfmsdmpkpAFMKQNLDElgIGTyHNIAF 195
Cdd:cd04605    8 KDVATIREDISIEEAAKIMIDKNVTHLPVVSE-DGKLIGIVTSWDISKAV----------ALKKDSLEE--IMT-RNVIT 73

                         90       100       110
                 ....*....|....*....|....*....|....*.
gi 282847331 196 IHPDTPIIKALNIFVERRISALPVVDESGKVVDIYS 231
Cdd:cd04605   74 ARPDEPIELAARKMEKHNISALPVVDDDRRVIGIIT 109

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with the pyridoxal-phosphate (PALP) dependent enzyme domain; This cd contains two tandem repeats of the cystathionine beta-synthase (CBS pair) domains associated with the pyridoxal-phosphate (PALP) dependent enzyme domain upstream. Cystathionine beta-synthase (CBS ) contains, besides the C-terminal regulatory CBS-pair, an N-terminal heme-binding module, followed by a pyridoxal phosphate (PLP) domain, which houses the active site. It is the first enzyme in the transsulfuration pathway, catalyzing the conversion of serine and homocysteine to cystathionine and water. In general, CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 195 FIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDiTVTQALQHRsqyFEGVVKCSKLETL 274
Cdd:cd04608   14 TVLPDDTLGEAIEIMREYGVDQLPVVDEDGRVVGMVTEGNLLSSLLAGRAQPSD-PVSKAMYKQ---FKQVDLDTPLGAL 89

                         90       100       110
                 ....*....|....*....|....*....|....
gi 282847331 275 ETIVDRivraeVHRLVVVNEADSIVGIISLSDIL 308
Cdd:cd04608   90 SRILER-----DHFALVVDGQGKVLGIVTRIDLL 118

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains found in diguanylate cyclase/phosphodiesterase proteins with PAS sensors, repeat 1; This cd contains two tandem repeats of the cystathionine beta-synthase (CBS pair) domains found in diguanylate cyclase/phosphodiesterase proteins with PAS sensors. PAS domains have been found to bind ligands, and to act as sensors for light and oxygen in signal transduction. The GGDEF domain has been suggested to be homologous to the adenylyl cyclase catalytic domain and is thought to be involved in regulating cell surface adhesiveness in bacteria. The CBS domain, named after human CBS, is a small domain originally identified in cystathionine beta-synthase and is subsequently found in a wide range of different proteins. CBS domains usually occur in tandem repeats. They associate to form a so-called Bateman domain or a CBS pair based on crystallographic studies in bacteria. The CBS pair was used as a basis for this cd hierarchy since the human CBS proteins can adopt the typical core structure and form an intramolecular CBS pair. The interface between the two CBS domains forms a cleft that is a potential ligand binding site. The CBS pair coexists with a variety of other functional domains and this has been used to help in its classification here. It has been proposed that the CBS domain may play a regulatory role, although its exact function is unknown. Mutations of conserved residues within this domain are associated with a variety of human hereditary diseases, including congenital myotonia, idiopathic generalized epilepsy, hypercalciuric nephrolithiasis, and classic Bartter syndrome (CLC chloride channel family members), Wolff-Parkinson-White syndrome (gamma 2 subunit of AMP-activated protein kinase), retinitis pigmentosa (IMP dehydrogenase-1), and homocystinuria (cystathionine beta-synthase).

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 282847331 198 PDTPIIKALNIFVERRISALpVVDESGKVVDIYSKFDVinLAaektynnLDITVTQALQHR-SQYFEGVVKCSKLETleT 276
Cdd:cd09833   12 PDTPLADAAARMAERRCSSI-LIVENGEIVGIWTERDA--LK-------LDFSDPDAFRRPiSEVMSSPVLTIPQDT--T 79