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CATH Superfamily 3.40.50.970

Thiamin diphosphate (ThDP)-binding fold, Pyr/PP domains

The name of this superfamily has been modified since the most recent official CATH+ release (v4_2_0). At the point of the last release, this superfamily was: waiting to be named.

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
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FunFam 26902: Putative Pyruvate oxidase/dehydrogenase

There are 2 EC terms in this cluster

Please note: EC annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

Note: The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.

EC Term Annotations Evidence
Pyruvate oxidase. [EC: 1.2.3.3]
Pyruvate + phosphate + O(2) = acetyl phosphate + CO(2) + H(2)O(2).
  • Two reducing equivalents are transferred from the resonant carbanion/enamine forms of 2-hydroxyethyl-thiamine-diphosphate to the adjacent flavin cofactor, yielding 2-acetyl-thiamine diphosphate (AcThDP) and reduced flavin.
  • FADH is reoxidized by O(2) to yield H(2)O(2) and FAD and AcThDP is cleaved phosphorolytically to acetyl phosphate and thiamine diphosphate.
 22 A0A087JXH8 A0A0D7XRX2 A0A0E1LJN1 A0A0H3EAM8 A0A0K6JKE4 A0A0M0KUL3 A0A0T8PZS8 A0A0U0D4J8 A0A142FBB9 A0A172XES5
(12 more...)
Pyruvate dehydrogenase (quinone). [EC: 1.2.5.1]
Pyruvate + ubiquinone + H(2)O = acetate + CO(2) + ubiquinol.
  • This bacterial enzyme is located on the inner surface of the cytoplasmic membrane and coupled to the respiratory chain via ubiquinone.
  • Does not accept menaquinone.
  • Activity is greatly enhanced by lipids.
  • Requires thiamine diphosphate.
  • The enzyme can also form acetoin.
 1 S6FPF0