Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1trka2 Alpha and beta proteins (a/b) Thiamin diphosphate-binding fold (THDP-binding) Thiamin diphosphate-binding fold (THDP-binding) TK-like Pyr module Transketolase (TK), Pyr module baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ], SCOPe (2.08)
Ad1trka1 Alpha and beta proteins (a/b) Thiamin diphosphate-binding fold (THDP-binding) Thiamin diphosphate-binding fold (THDP-binding) TK-like PP module Transketolase (TK), PP module baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ], SCOPe (2.08)
Ad1trka3 Alpha and beta proteins (a/b) TK C-terminal domain-like TK C-terminal domain-like Transketolase C-terminal domain-like Transketolase (TK), C-domain baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ], SCOPe (2.08)
Bd1trkb2 Alpha and beta proteins (a/b) Thiamin diphosphate-binding fold (THDP-binding) Thiamin diphosphate-binding fold (THDP-binding) TK-like Pyr module Transketolase (TK), Pyr module baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ], SCOPe (2.08)
Bd1trkb1 Alpha and beta proteins (a/b) Thiamin diphosphate-binding fold (THDP-binding) Thiamin diphosphate-binding fold (THDP-binding) TK-like PP module Transketolase (TK), PP module baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ], SCOPe (2.08)
Bd1trkb3 Alpha and beta proteins (a/b) TK C-terminal domain-like TK C-terminal domain-like Transketolase C-terminal domain-like Transketolase (TK), C-domain baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyThiamin diphosphate-binding fold (THDP-binding) 8036146 3001790 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyTK C-terminal domain-like 8036147 3000424 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyThiamin diphosphate-binding fold (THDP-binding) 8036144 3001790 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyThiamin diphosphate-binding fold (THDP-binding) 8036146 3001790 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyThiamin diphosphate-binding fold (THDP-binding) 8036144 3001790 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyTK C-terminal domain-like 8036147 3000424 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
ATransketolase_C_1e1trkA1 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_C_1ECOD (1.6)
ATransketolase_Ne1trkA3 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: Transketolase_NECOD (1.6)
ATransket_pyre1trkA2 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)
BTransketolase_C_1e1trkB1 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_C_1ECOD (1.6)
BTransketolase_Ne1trkB3 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: Transketolase_NECOD (1.6)
BTransket_pyre1trkB2 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
A, B
PF02779Transketolase, pyrimidine binding domain (Transket_pyr)Transketolase, pyrimidine binding domainThis family includes transketolase enzymes, pyruvate dehydrogenases, and branched chain alpha-keto acid decarboxylases.Domain
A, B
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
A, B
PF00456Transketolase, thiamine diphosphate binding domain (Transketolase_N)Transketolase, thiamine diphosphate binding domainThis family includes transketolase enzymes EC:2.2.1.1. and also partially matches to 2-oxoisovalerate dehydrogenase beta subunit Swiss:P37941 EC:1.2.4.4. Both these enzymes utilise thiamine pyrophosphate as a cofactor, suggesting there may be common ...This family includes transketolase enzymes EC:2.2.1.1. and also partially matches to 2-oxoisovalerate dehydrogenase beta subunit Swiss:P37941 EC:1.2.4.4. Both these enzymes utilise thiamine pyrophosphate as a cofactor, suggesting there may be common aspects in their mechanism of catalysis.
Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B
TRANSKETOLASE

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

ChainsEnzyme NameDescriptionCatalytic Residues
A, B
transketolase  M-CSA #219

Transketolase (EC:2.2.1.1) (TK) catalyses the reversible transfer of a two-carbon ketol unit from xylulose 5-phosphate to an aldose receptor, such as ribose 5-phosphate, to form sedoheptulose 7-phosphate and glyceraldehyde 3- phosphate. This enzyme, together with transaldolase, provides a link between the glycolytic and pentose-phosphate pathways. TK requires thiamine pyrophosphate and a divalent metal cation as a cofactor.

Catalytic activity has been noted with a wide variety of divalent metal ions coordinating the diphosphate group of the cofactor [PMID:9924800] and whilst there is still some debate as to the exact nature of the native metal cation (most of the work on the determination of the mechanism has utilised the magnesium cation), Esakova et al. have determined that the enzyme is more stable in the presence of Ca(II), making this the more likely native metal cation [PMID:16125202] .

Defined by 4 residues: HIS:A-30HIS:A-263GLU:B-418HIS:B-481
 | 
 
Explore in 3DM-CSA Motif Definition