Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyMethylglyoxal synthase-like 8038873 3001443 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyCytidine deaminase-like 8038874 3001838 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyCytidine deaminase-like 8038874 3001838 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyMethylglyoxal synthase-like 8038873 3001443 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AAICARFT_IMPCHas_1ste1p4rA4 A: a+b three layersX: Cytidine deaminase-like (From Topology)H: Cytidine deaminase-like (From Topology)T: Cytidine deaminase-likeF: AICARFT_IMPCHas_1stECOD (1.6)
AAICARFT_IMPCHas_2nde1p4rA3 A: a+b three layersX: Cytidine deaminase-like (From Topology)H: Cytidine deaminase-like (From Topology)T: Cytidine deaminase-likeF: AICARFT_IMPCHas_2ndECOD (1.6)
AMGSe1p4rA1 A: a/b three-layered sandwichesX: Methylglyoxal synthase-like (From Topology)H: Methylglyoxal synthase-like (From Topology)T: Methylglyoxal synthase-likeF: MGSECOD (1.6)
BAICARFT_IMPCHas_1ste1p4rB4 A: a+b three layersX: Cytidine deaminase-like (From Topology)H: Cytidine deaminase-like (From Topology)T: Cytidine deaminase-likeF: AICARFT_IMPCHas_1stECOD (1.6)
BAICARFT_IMPCHas_2nde1p4rB3 A: a+b three layersX: Cytidine deaminase-like (From Topology)H: Cytidine deaminase-like (From Topology)T: Cytidine deaminase-likeF: AICARFT_IMPCHas_2ndECOD (1.6)
BMGSe1p4rB1 A: a/b three-layered sandwichesX: Methylglyoxal synthase-like (From Topology)H: Methylglyoxal synthase-like (From Topology)T: Methylglyoxal synthase-likeF: MGSECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A1.10.287.440 Mainly Alpha Orthogonal Bundle Helix Hairpins CATH (4.3.0)
A3.40.140.20 Alpha Beta 3-Layer(aba) Sandwich Cytidine Deaminase domain 2CATH (4.3.0)
A3.40.50.1380 Alpha Beta 3-Layer(aba) Sandwich Rossmann fold Methylglyoxal synthase-like domainCATH (4.3.0)
B1.10.287.440 Mainly Alpha Orthogonal Bundle Helix Hairpins CATH (4.3.0)
B3.40.140.20 Alpha Beta 3-Layer(aba) Sandwich Cytidine Deaminase domain 2CATH (4.3.0)
B3.40.50.1380 Alpha Beta 3-Layer(aba) Sandwich Rossmann fold Methylglyoxal synthase-like domainCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B
PF02142MGS-like domain (MGS)MGS-like domainThis domain composes the whole protein of methylglyoxal synthetase and the domain is also found in Carbamoyl phosphate synthetase (CPS) where it forms a regulatory domain that binds to the allosteric effector ornithine. This family also includes ino ...This domain composes the whole protein of methylglyoxal synthetase and the domain is also found in Carbamoyl phosphate synthetase (CPS) where it forms a regulatory domain that binds to the allosteric effector ornithine. This family also includes inosicase. The known structures in this family show a common phosphate binding site [1].
Domain
A, B
PF01808AICARFT/IMPCHase bienzyme (AICARFT_IMPCHas)AICARFT/IMPCHase bienzyme- Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B
Bifunctional purine biosynthesis protein PURH

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
A, B
phosphoribosylaminoimidazolecarboxamide formyltransferase  M-CSA #646

The enzyme AITC is bifunctional being involved in the production of IMP, the final product of the de novo purine synthesis pathway.. The catalytic centre described here catalyses the first step in AIRC activity, the formylation of AICAR to form 5-formyl AICAR which can then be cyclised by the second catalytic centre. The enzyme shows a high degree of sequence conservation among organisms from E.coli to man, but does not show homology to other formyl transferases, suggesting that the bifunctionality has evolved from one gene rather than two.

Defined by 4 residues: LYS:A-266HIS:A-267ASN:B-431HIS:B-592
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