IUBMB Enzyme Nomenclature


Accepted name: 5-carboxymethyl-2-hydroxymuconate Δ-isomerase

Reaction: 5-carboxymethyl-2-hydroxymuconate = (3E,5R)-5-carboxy-2-oxohept-3-enedioate

Glossary: 5-carboxymethyl-2-hydroxymuconate = (2E,4Z)-5-hydroxypenta-2,4-diene-1,2,5-tricarboxylate

Other name(s): CHM isomerase; 5-carboxymethyl-2-hydroxymuconic acid isomerase

Systematic name: 5-carboxymethyl-2-hydroxymuconate Δ24-2-oxo,Δ3-isomerase

Comments: Part of the homoprotocatechuate degradation pathway in Escherichia coli C.

Links to other databases: BRENDA, EAWAG-BBD, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 79079-05-3


1. Garrido-Pertierra, A. and Cooper, R.A. Identification and purification of distinct isomerase and decarboxylase enzymes involved in the 4-hydroxyphenylacetate catabolic pathway of Escherichia coli. Eur. J. Biochem. 117 (1981) 581-584. [PMID: 7026235]

[EC created 1984]

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