Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyThiamin diphosphate-binding fold (THDP-binding) 8032827 3001790 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyTK C-terminal domain-like 8037948 3000424 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyThiamin diphosphate-binding fold (THDP-binding) 8037947 3001790 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AE1_dhe1dtwA1 A: a/b three-layered sandwichesX: Thiamin diphosphate-binding fold (THDP-binding) (From Topology)H: Thiamin diphosphate-binding fold (THDP-binding) (From Topology)T: Thiamin diphosphate-binding fold (THDP-binding)F: E1_dhECOD (1.6)
BTransketolase_Ce1dtwB1 A: a/b three-layered sandwichesX: TK C-terminal domain-like (From Topology)H: TK C-terminal domain-like (From Topology)T: TK C-terminal domain-likeF: Transketolase_CECOD (1.6)
BTransket_pyre1dtwB2 A: a/b three-layered sandwichesX: Thiamin diphosphate-binding fold (THDP-binding) (From Topology)H: Thiamin diphosphate-binding fold (THDP-binding) (From Topology)T: Thiamin diphosphate-binding fold (THDP-binding)F: Transket_pyrECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00676Dehydrogenase E1 component (E1_dh)Dehydrogenase E1 component- Family
PF02779Transketolase, pyrimidine binding domain (Transket_pyr)Transketolase, pyrimidine binding domainThis family includes transketolase enzymes, pyruvate dehydrogenases, and branched chain alpha-keto acid decarboxylases.Domain
PF02780Transketolase, C-terminal domain (Transketolase_C)Transketolase, C-terminal domainThe C-terminal domain of transketolase has been proposed as a regulatory molecule binding site [2].Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
BRANCHED-CHAIN ALPHA-KETO ACID DEHYDROGENASE ALPHA SUBUNIT
BRANCHED-CHAIN ALPHA-KETO ACID DEHYDROGENASE BETA SUBUNIT

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

ChainsEnzyme NameDescriptionCatalytic Residues
A, B
3-methyl-2-oxobutanoate dehydrogenase (2-methylpropanoyl-transferring)  M-CSA #280

The branched-chain alpha-keto dehydrogenase complex catalyzes the overall conversion of alpha-keto acids to acyl-CoA and CO2. It is a multienzyme complex composed of 3 functional components: (E1) branched-chain alpha-keto acid decarboxylase or 2-oxoisovalerate dehydrogenase; (E2) lipoamide acyltransferase; (E3) lipoamide dehydrogenase. This entry represents E2, the lipoamide acyltransferase function, which is a thiamine diphposphate dependent reaction.

Defined by 4 residues: SER:A-162HIS:A-291SER:A-292GLU:B_2-76
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