IUBMB Enzyme Nomenclature


Accepted name: trans-aconitate decarboxylase

Reaction: trans-aconitate = itaconate + CO2

Glossary: trans-aconitate = (E)-prop-1-ene-1,2,3-tricarboxylate
itaconate = 2-methylenesuccinate

Other name(s): TAD1 (gene name)

Systematic name: trans-aconitate carboxy-lyase (itaconate-forming)

Comments: The enzyme, characterized from the smut fungus Ustilago maydis, is involved in an alternative pathway for the biosynthesis of itaconate. cf. EC, cis-aconitate decarboxylase.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:


1. Geiser, E., Przybilla, S.K., Friedrich, A., Buckel, W., Wierckx, N., Blank, L.M. and Bolker, M. Ustilago maydis produces itaconic acid via the unusual intermediate trans-aconitate. Microb Biotechnol 9 (2016) 116-126. [PMID: 26639528]

[EC created 2018]

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