IUBMB Enzyme Nomenclature


Accepted name: L-tryptophan ammonia lyase

Reaction: L-tryptophan = 3-indoleacrylate + NH3

Glossary: 3-indoleacrylate = (2E)-3-(1H-indol-3-yl)prop-2-enoate

Other name(s): WAL

Systematic name: L-tryptophan ammonia-lyase (3-indoleacrylate-forming)

Comments: The enzyme, characterized from the bacterium Rubrivivax benzoatilyticus JA2, requires no cofactors. It acts on L-phenylalanine and L-glutamate with about 60% of the activity with L-tryptophan, and on L-tyrosine, glycine, and L-alanine with about 30% of the activity.

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


1. Kumavath, R.N., Ramana ChV., Sasikala Ch, Barh, D., Kumar, A.P. and Azevedo, V. Isolation and characterization of L-tryptophan ammonia lyase from Rubrivivax benzoatilyticus strain JA2. Curr Protein Pept Sci 16 (2015) 775-781. [PMID: 25961404]

[EC created 2016]

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