IUBMB Enzyme Nomenclature


Accepted name: 5-oxopent-3-ene-1,2,5-tricarboxylate decarboxylase

Reaction: (3E,5R)-5-carboxy-2-oxohept-3-enedioate = (4Z)-2-oxohept-4-enedioate + CO2 (overall reaction)
(1a) (3E,5R)-5-carboxy-2-oxohept-3-enedioate = (2Z,4Z)-2-hydroxyhepta-2,4-dienedioate + CO2
(1b) (2Z,4Z)-2-hydroxyhepta-2,4-dienedioate = (4Z)-2-oxohept-4-enedioate

Glossary: 5-carboxy-2-oxohept-3-enedioate = 5-oxopent-3-ene-1,2,5-tricarboxylate

Other name(s): 5-carboxymethyl-2-oxo-hex-3-ene-1,6-dioate decarboxylase; 5-oxopent-3-ene-1,2,5-tricarboxylate carboxy-lyase; 5-oxopent-3-ene-1,2,5-tricarboxylate carboxy-lyase (2-oxohept-3-enedioate-forming)

Systematic name: (3E,5R)-5-carboxy-2-oxohept-3-enedioate carboxy-lyase [(4Z)-2-oxohept-4-enedioate-forming]

Comments: Requires Mg2+ [2,3]. Part of the 4-hydroxyphenylacetate degradation pathway in Escherichia coli.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, UM-BBD, CAS registry number: 148619-60-7 (151404-80-7 and 173015-33-3)


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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