IUBMB Enzyme Nomenclature


Accepted name: β-methylphenylalanine transaminase

Reaction: (2S,3S)-3-methylphenylalanine + 2-oxoglutarate = (3S)-2-oxo-3-phenylbutanoate + L-glutamate

Glossary: (3S)-2-oxo-3-phenylbutanoate = (3S)-β-methyl-phenylpyruvate

Other name(s): TyrB

Systematic name: (2S,3S)-3-methylphenylalanine:2-oxoglutarate aminotransferase

Comments: Requires pyridoxal phosphate. Isolated from the bacterium Streptomyces hygroscopicus NRRL3085. It is involved in the biosynthesis of the glycopeptide antibiotic mannopeptimycin.

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


1. Huang, Y.T., Lyu, S.Y., Chuang, P.H., Hsu, N.S., Li, Y.S., Chan, H.C., Huang, C.J., Liu, Y.C., Wu, C.J., Yang, W.B. and Li, T.L. In vitro characterization of enzymes involved in the synthesis of nonproteinogenic residue (2S,3S)-β-methylphenylalanine in glycopeptide antibiotic mannopeptimycin. Chembiochem 10 (2009) 2480-2487. [PMID: 19731276]

[EC created 2014]

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