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CATH Classification

Domain Context

CATH Clusters

Superfamily Macrophage Migration Inhibitory Factor
Functional Family Tautomerase

Enzyme Information

5.3.2.6
2-hydroxymuconate tautomerase.
based on mapping to UniProt P70994
(2Z,4E)-2-hydroxyhexa-2,4-dienedioate = (3E)-2-oxohex-3-enedioate.
-!- Involved in the meta-cleavage pathway for the degradation of phenols, modified phenols and catechols. -!- The enol form (2Z,4E)-2-hydroxyhexa-2,4-dienedioate is produced as part of this pathway and is converted to the keto form (3E)-2-oxohex- 3-enedioate by the enzyme. -!- Another keto form, (4E)-2-oxohex-4-enedioate (4-oxalocrotonate), was originally thought to be produced by the enzyme but later shown to be produced non-enzymatically.

UniProtKB Entries (1)

P70994
4OT_BACSU
Bacillus subtilis subsp. subtilis str. 168
2-hydroxymuconate tautomerase

PDB Structure

PDB 2OPA
External Links
Method X-RAY DIFFRACTION
Organism Escherichia
Primary Citation
The Crystal Structure of YwhB, a 4-Oxalocrotonate Tautomerase Homologue from Bacillus subtilis: the Structural Basis for Catalysis, Inhibition, and Reaction Stereoselectivity.
Hackert, M.L., Whitman, C.P., Almrud, J.J., Dasgupta, R., Wang, S.C., Johnson, W.H.
TO BE PUBLISHED
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