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 100913189 191 TYHNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDITVTQALQHRSQYFEGVVKC 270
Cdd:cd04641    1 TYENIATASMDTPVIDALNLFVERRVSALPIVDEDGRVVDIYAKFDVINLAAEKTYNNLDLTVGEALQHRSEDFEGVHTC 80

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....
gi 100913189 271 NKLEILETIVDRIVRAEVHRLVVVNEADSIVGIISLSDILQALI 314
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 100913189 191 TYHNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDITVTQALQHRSQYFEGVVKC 270
Cdd:cd04641    1 TYENIATASMDTPVIDALNLFVERRVSALPIVDEDGRVVDIYAKFDVINLAAEKTYNNLDLTVGEALQHRSEDFEGVHTC 80

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....
gi 100913189 271 NKLEILETIVDRIVRAEVHRLVVVNEADSIVGIISLSDILQALI 314
Cdd:cd04641   81 TLNDTLETIIDRIVKAEVHRLVVVDEEDRLEGIVSLSDILKYLV 124

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

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 100913189 118 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDPiSGNALYILTHKRILKFLQLFMSDMPKPAFMKQNLDELgigTYHNIAF 197
Cdd:COG3448   10 RDVVTVSPDTTLREALELMREHGIRGLPVVDE-DGRLVGIVTERDLLRALLPDRLDELEERLLDLPVEDV---MTRPVVT 85

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*.
gi 100913189 198 IHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAE 243
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 100913189  193 HNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAE 243
Cdd:pfam00571   7 KDVVTVSPDTTLEEALELMREHGISRLPVVDEDGKLVGIVTLKDLLRALLG 57

IMP dehydrogenase / GMP reductase domain; This family is involved in biosynthesis of guanosine nucleotide. Members of this family contain a TIM barrel structure. In the inosine monophosphate dehydrogenases 2 CBS domains pfam00571 are inserted in the TIM barrel. This family is a member of the common phosphate binding site TIM barrel family.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 100913189  121 VNISPDASLFDAVYSLIKNKIHRLPVIDpiSGNALYILThKRILKFLQLFmsDMPKPAFMkqnldelgigTYHNIAFIHP 200
Cdd:pfam00478  91 VTLSPDATVADALALMERYGISGVPVVD--DGKLVGIVT-NRDLRFETDL--SQPVSEVM----------TKENLVTAPE 155

                          90       100
                  ....*....|....*....|....*....
gi 100913189  201 DTPIIKALNIFVERRISALPVVDESGKVV 229
Cdd:pfam00478 156 GTTLEEAKEILHKHKIEKLPVVDDNGRLV 184

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 100913189 191 TYHNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDITVTQALQHRSQYFEGVVKC 270
Cdd:cd04641    1 TYENIATASMDTPVIDALNLFVERRVSALPIVDEDGRVVDIYAKFDVINLAAEKTYNNLDLTVGEALQHRSEDFEGVHTC 80

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....
gi 100913189 271 NKLEILETIVDRIVRAEVHRLVVVNEADSIVGIISLSDILQALI 314
Cdd:cd04641   81 TLNDTLETIIDRIVKAEVHRLVVVDEEDRLEGIVSLSDILKYLV 124

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains superfamily; 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 100913189 193 HNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKtYNNLDITVTQALQhrsqyfEGVVKCNK 272
Cdd:cd02205    2 RDVVTVDPDTTVREALELMAENGIGALPVVDDDGKLVGIVTERDILRALVEG-GLALDTPVAEVMT------PDVITVSP 74

                         90       100       110
                 ....*....|....*....|....*....|....*....
gi 100913189 273 LEILETIVDRIVRAEVHRLVVVNEADSIVGIISLSDILQ 311
Cdd:cd02205   75 DTDLEEALELMLEHGIRRLPVVDDDGKLVGIVTRRDILR 113

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

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 100913189 118 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDPiSGNALYILTHKRILKFLQLFMSDMPKPAFMKQNLDELgigTYHNIAF 197
Cdd:COG3448   10 RDVVTVSPDTTLREALELMREHGIRGLPVVDE-DGRLVGIVTERDLLRALLPDRLDELEERLLDLPVEDV---MTRPVVT 85

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*.
gi 100913189 198 IHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAE 243
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 100913189 193 HNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDITVTQALQHRsqyfegVVKCNK 272
Cdd:COG2905    7 RDVVTVSPDATVREAARLMTEKGVGSLVVVDDDGRLVGIITDRDLRRRVLAEGLDPLDTPVSEVMTRP------PITVSP 80

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|..
gi 100913189 273 LEILETIVDRIVRAEVHRLVVVnEADSIVGIISLSDILQALI 314
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 100913189 118 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDpisGNALY-ILTHKRILKFLqlfMSDMPKPAFMKQNLDELGIgTYHNI- 195
Cdd:cd04584    8 KNVVTVTPDTSLAEARELMKEHKIRHLPVVD---DGKLVgIVTDRDLLRAS---PSKATSLSIYELNYLLSKI-PVKDIm 80

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|
gi 100913189 196 ----AFIHPDTPIIKALNIFVERRISALPVVDEsGKVVDIYSKFDVINLA 241
Cdd:cd04584   81 tkdvITVSPDDTVEEAALLMLENKIGCLPVVDG-GKLVGIITETDILRAF 129

CBS domain [Signal transduction mechanisms];

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 100913189 118 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDpiSGNALY-ILTHKRILKFLqlfmsdmpkpAFMKQNLDELGIGTY--HN 194
Cdd:COG0517    9 TDVVTVSPDATVREALELMSEKRIGGLPVVD--EDGKLVgIVTDRDLRRAL----------AAEGKDLLDTPVSEVmtRP 76

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*....
gi 100913189 195 IAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAE 243
Cdd:COG0517   77 PVTVSPDTSLEEAAELMEEHKIRRLPVVDDDGRLVGIITIKDLLKALLE 125

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains superfamily; 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 100913189  36 SSKLVVFDTTLQVKKAFFALVANGVRAAPLWESKKQsFVGMLTITDFINILHRYYKSPMVQIYELEEHKIETwrelylqe 115
Cdd:cd02205    1 TRDVVTVDPDTTVREALELMAENGIGALPVVDDDGK-LVGIVTERDILRALVEGGLALDTPVAEVMTPDVIT-------- 71

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|
gi 100913189 116 tfkplvnISPDASLFDAVYSLIKNKIHRLPVIDPiSGNALYILTHKRILK 165
Cdd:cd02205   72 -------VSPDTDLEEALELMLEHGIRRLPVVDD-DGKLVGIVTRRDILR 113

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 100913189 198 IHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDITVTQALQHRSQyFEGVVKcnklEILE 277
Cdd:cd04600    8 VTPDTSLEEAWRLLRRHRIKALPVVDRARRLVGIVTLADLLKHADLDPPRGLRGRLRRTLGLRRD-RPETVG----DIMT 82

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|
gi 100913189 278 TIVdRIVRAEVH--RLV------------VVNEADSIVGIISLSDILQAL 313
Cdd:cd04600   83 RPV-VTVRPDTPiaELVplfsdgglhhipVVDADGRLVGIVTQSDLIAAL 131

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains found in archaea and associated with helix turn helix domain; 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 100913189 118 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDpiSGNALYILTHKRILKFLQLFMSDMPKPAFMKQNldelgigtyhnIAF 197
Cdd:cd04588    2 KDLITLKPDATIKDAAKLLSENNIHGAPVVD--DGKLVGIVTLTDIAKALAEGKENAKVKDIMTKD-----------VIT 68

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|...
gi 100913189 198 IHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINL 240
Cdd:cd04588   69 IDKDEKIYDAIRLMNKHNIGRLIVVDDNGKPVGIITRTDILKV 111

Domain in cystathionine beta-synthase and other proteins; Domain present in all 3 forms of cellular life. Present in two copies in inosine monophosphate dehydrogenase, of which one is disordered in the crystal structure. A number of disease states are associated with CBS-containing proteins including homocystinuria, Becker's and Thomsen disease.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*
gi 100913189   198 IHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAA 242
Cdd:smart00116   5 VSPDTTLEEALELLRENGIRRLPVVDEEGRLVGIVTRRDIIKALA 49

signal transduction protein with CBS domains; 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 100913189 118 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDPISGNALYILTHKRILKFL-----QLFMSDMPKPAFMKQNLDELGIGTY 192
Cdd:cd17779    8 KDVITIPPTTTIIGAIKTMTEKGFRRLPVADAGTKRLEGIVTSMDIVDFLgggskYNLVEKKHNGNLLAAINEPVREIMT 87

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*.
gi 100913189 193 HNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVI 238
Cdd:cd17779   88 RDVISVKENASIDDAIELMLEKNVGGLPIVDKDGKVIGIVTERDFL 133

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 100913189 193 HNIAFIHPDTPIIKALNIFVERRISALPVVDEsGKVV------DIyskfdVIN-LAAEKTYNnlDITVTQALQHrsqyfe 265
Cdd:cd04622    3 RDVVTVSPDTTLREAARLMRDLDIGALPVCEG-DRLVgmvtdrDI-----VVRaVAEGKDPN--TTTVREVMTG------ 68

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....
gi 100913189 266 GVVKCNKLEILETIVDRIVRAEVHRLVVVNEADSIVGIISLSDI 309
Cdd:cd04622   69 DVVTCSPDDDVEEAARLMAEHQVRRLPVVDDDGRLVGIVSLGDL 112

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 100913189 200 PDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDITVTQALQHRSQYFEG---VVKCNKLEI- 275
Cdd:cd17789   10 PNTTVDEALELLVENRITGLPVIDEDWRLVGVVSDYDLLALDSISGRSQTDNNFPPADSTWKTFNEVqklLSKTNGKVVg 89

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|..
gi 100913189 276 -LETIVDRIVRAE--------------VHRLVVVNEADSIVGIISLSDILQA 312
Cdd:cd17789   90 dVMTPSPLVVREKtnledaarilletkFRRLPVVDSDGKLVGIITRGNVVRA 141

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains found in archaea and associated with helix turn helix domain; 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 100913189 193 HNIAFIHPDTPIIKALNIFVERRISALPVVDEsGKVVDIYSKFDVINLAAEktyNNLDITVTQALQHRsqyfegVVKCNK 272
Cdd:cd04588    2 KDLITLKPDATIKDAAKLLSENNIHGAPVVDD-GKLVGIVTLTDIAKALAE---GKENAKVKDIMTKD------VITIDK 71

                         90       100       110
                 ....*....|....*....|....*....|....*....
gi 100913189 273 LEILETIVDRIVRAEVHRLVVVNEADSIVGIISLSDILQ 311
Cdd:cd04588   72 DEKIYDAIRLMNKHNIGRLIVVDDNGKPVGIITRTDILK 110

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 100913189 118 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDPiSGNALYILTHKRILKFLQLFMS-DMPKPAFMKQNLdelgIGTYhnia 196
Cdd:cd09836    3 KPVVTVPPETTIREAAKLMAENNIGSVVVVDD-DGKPVGIVTERDIVRAVAEGIDlDTPVEEIMTKNL----VTVS---- 73

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|...
gi 100913189 197 fihPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVIN 239
Cdd:cd09836   74 ---PDESIYEAAELMREHNIRHLPVVDGGGKLVGVISIRDLAR 113

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 100913189 118 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDPISGNALYILTHKRILKFLQLFMSDMPKPAFMKQnldelgigtyhNIAF 197
Cdd:cd17772    2 SPVISVEPDTTIAEAAELMTRYNINALPVVDGGTGRLVGIITRQVAEKAIYHGLGDLPVSEYMTT-----------EFAT 70

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|...
gi 100913189 198 IHPDTPIIKALNIFVERRISALPVVDEsGKVVDIYSKFDVINL 240
Cdd:cd17772   71 VTPDAPLSEIQEIIVEQRQRLVPVVED-GRLVGVITRTDLLNL 112

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 100913189 118 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDpisGNALY-ILTHKRILKFLQLFMSDMPKPAFMKQNLDELG----IGTY 192
Cdd:cd17777   10 PPVLSISPSAPILSAFEKMNRRGIRRLVVVD---ENKLEgILSARDLVSYLGGGCLFKIVESRHQGDLYSALnrevVETI 86

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*...
gi 100913189 193 H--NIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVI 238
Cdd:cd17777   87 MtpNPVYVYEDSDLIEALTIMVTRGIGSLPVVDRDGRPVGIVTERDLV 134

CBS pair domains found in archeal proteins, repeat 2; 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 100913189 118 KPLVNISPDASLFDAVYSLIKNKIHRLPVIDpiSGNALYILTHKRILKFL--QLFMSDMPKP---AFMKQNLDELgigTY 192
Cdd:cd17778    8 TPVVTIYPDDTLKEAMELMVTRGFRRLPVVS--GGKLVGIVTAMDIVKYFgsHEAKKRLTTGdidEAYSTPVEEI---MS 82

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*.
gi 100913189 193 HNIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVI 238
Cdd:cd17778   83 KEVVTIEPDADIAEAARLMIKKNVGSLLVVDDEGELKGIITERDVL 128

Domain in cystathionine beta-synthase and other proteins; Domain present in all 3 forms of cellular life. Present in two copies in inosine monophosphate dehydrogenase, of which one is disordered in the crystal structure. A number of disease states are associated with CBS-containing proteins including homocystinuria, Becker's and Thomsen disease.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*...
gi 100913189   267 VVKCNKLEILETIVDRIVRAEVHRLVVVNEADSIVGIISLSDILQALI 314
Cdd:smart00116   2 VVTVSPDTTLEEALELLRENGIRRLPVVDEEGRLVGIVTRRDIIKALA 49

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

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 100913189  43 DTTLqvKKAFFALVANGVRAAPLWESKKQsFVGMLTITDFINILHRYYKSPMVqiYELEEHKIE---TwrelylqetfKP 119
Cdd:COG3448   18 DTTL--REALELMREHGIRGLPVVDEDGR-LVGIVTERDLLRALLPDRLDELE--ERLLDLPVEdvmT----------RP 82

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....*...
gi 100913189 120 LVNISPDASLFDAVYSLIKNKIHRLPVIDPiSGNALYILTHKRILKFL 167
Cdd:COG3448   83 VVTVTPDTPLEEAAELMLEHGIHRLPVVDD-DGRLVGIVTRTDLLRAL 129

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 100913189 194 NIAFIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKtYNNLDITVTQalqhrsqyfeGVVKCNKL 273
Cdd:cd04605    9 DVATIREDISIEEAAKIMIDKNVTHLPVVSEDGKLIGIVTSWDISKAVALK-KDSLEEIMTR----------NVITARPD 77

                         90       100       110
                 ....*....|....*....|....*....|....*.
gi 100913189 274 EILETIVDRIVRAEVHRLVVVNEADSIVGIISLSDI 309
Cdd:cd04605   78 EPIELAARKMEKHNISALPVVDDDRRVIGIITSDDI 113

Two tandem repeats of the cystathionine beta-synthase (CBS pair) domains present in proteobacteria; 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 100913189 198 IHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDV-----INLAAEKTYNNLDITVTQALQHRSQY----FEGVV 268
Cdd:cd04640   10 IDPDVSADEALEKMIRRGVRLLLVVDANNRVIGLITARDIlgekpLKIVQERGIPREELLVADVMTPRDKLealdYEDVA 89

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|....
gi 100913189 269 KCNKLEILETIVDrivRAEVHRLVVVNEADS---IVGIISLSDI 309
Cdd:cd04640   90 HARVGDVVETLKA---SGRQHALVVDRDEDGrqeVRGIFSASQI 130

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 100913189 197 FIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAAEKTYNNLDiTVTQALQHRsqyFEGVVKCNKLEIL 276
Cdd:cd04608   14 TVLPDDTLGEAIEIMREYGVDQLPVVDEDGRVVGMVTEGNLLSSLLAGRAQPSD-PVSKAMYKQ---FKQVDLDTPLGAL 89

                         90       100       110
                 ....*....|....*....|....*....|....
gi 100913189 277 ETIVDRivraeVHRLVVVNEADSIVGIISLSDIL 310
Cdd:cd04608   90 SRILER-----DHFALVVDGQGKVLGIVTRIDLL 118

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 100913189 197 FIHPDTPIIKALNIFVERRISALPVVDESGKVVDIYSKFDVINLAaektynNLDITVtqalqhrSQY---FEGVVKCNKL 273
Cdd:cd04601    6 TLSPDATVADVLELKAEYGISGVPVTEDGGKLVGIVTSRDIRFET------DLSTPV-------SEVmtpDERLVTAPEG 72