IUBMB Enzyme Nomenclature


Accepted name: tryptophan 2-monooxygenase

Reaction: L-tryptophan + O2 = (indol-3-yl)acetamide + CO2 + H2O

Other name(s): tms1 (gene name); iaaM (gene name)

Systematic name: L-tryptophan:oxygen 2-oxidoreductase (decarboxylating)

Comments: The enzyme, studied from phytopathogenic bacteria such as Pseudomonas savastanoi, is involved in a pathway for the production of (indol-3-yl)acetate (IAA), the main auxin hormone in plants.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 37256-65-8


1. Kosuge, T., Heskett, M.G. and Wilson, E.E. Microbial synthesis and degradation of indole-3-acetic acid. I. The conversion of L-tryptophan to indole-3-acetamide by an enzyme system from Pseudomonas savastanoi. J. Biol. Chem. 241 (1966) 3738-3744. [PMID: 5916389]

2. Kuo, T.T. and Kosuge, T. Factors influencing the production and further metabolism of indole-3-acetic acid by Pseudomonas savastanoi. J. Gen. Appl. Microbiol. 15 (1969) 51-63.

3. Hutcheson, S.W. and Kosuge, T. Regulation of 3-indoleacetic acid production in Pseudomonas syringae pv. savastanoi. Purification and properties of tryptophan 2-monooxygenase. J. Biol. Chem. 260 (1985) 6281-6287. [PMID: 3997822]

4. Onckelen, H.V., Prinsen, E., Inze, D., Ruedeisheim, P., Lijsebettens, M.V., Follin, A., Schell, J., Montagu, M.V. and Greef, J.D. AgrobacteriumT-DNA gene1codes for tryptophan 2-monooxygenase activity in tobacco crown gall cells. FEBS Lett. 198 (1986) 357-360.

5. Emanuele, J.J. and Fitzpatrick, P.F. Mechanistic studies of the flavoprotein tryptophan 2-monooxygenase. 1. Kinetic mechanism. Biochemistry 34 (1995) 3710-3715. [PMID: 7893667]

[EC created 1972]

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