IUBMB Enzyme Nomenclature


Accepted name: trans-aconitate 2-methyltransferase

Reaction: S-adenosyl-L-methionine + trans-aconitate = S-adenosyl-L-homocysteine + (E)-3-(methoxycarbonyl)pent-2-enedioate

For diagram click here.

trans-aconitate = (E)-prop-1-ene-1,2,3-tricarboxylate

Systematic name: S-adenosyl-L-methionine:(E)-prop-1-ene-1,2,3-tricarboxylate 2'-O-methyltransferase

Comments: Also catalyses the formation of the methyl monoester of cis-aconitate, isocitrate and citrate, but more slowly. While the enzyme from Escherichia coli forms (E)-3-(methoxycarbonyl)-pent-2-enedioate as the product, that from Saccharomyces cerevisiae forms (E)-2-(methoxycarbonylmethyl)butenedioate and is therefore classified as a separate enzyme (cf. EC, trans-aconitate 3-methyltransferase).

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 235107-12-7 (same as EC


1. Cai, H. and Clarke, S. A novel methyltransferase catalyzes the esterification of trans-aconitate in Escherichia coli. J. Biol. Chem. 274 (1999) 13470-13479. [PMID: 10224113]

2. Cai, H., Strouse, J., Dumlao, D., Jung, M.E. and Clarke, S. Distinct reactions catalyzed by bacterial and yeast trans-aconitate methyltransferase. Biochemistry 40 (2001) 2210-2219. [PMID: 11329290]

3. Cai, H., Dumlao, D., Katz, J.E. and Clarke, S. Identification of the gene and characterization of the activity of the trans-aconitate methyltransferase from Saccharomyces cerevisiae. Biochemistry 40 (2001) 13699-13709. [PMID: 11695919]

[EC created 2002]

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