IUBMB Enzyme Nomenclature


Accepted name: L-tyrosine reductase

Reaction: L-tyrosinal + NADP+ + AMP + diphosphate = L-tyrosine + NADPH + H+ + ATP

Glossary: L-tyrosinal = (2S)-2-amino-3-(4-hydroxyphenyl)propanal

Other name(s): lnaA (gene name); lnbA (gene name)

Systematic name: (2S)-2-amino-3-(4-hydroxyphenyl)propanal:NADP+ oxidoreductase (ATP-forming)

Comments: The enzyme, characterized from the ascomycete fungus Aspergillus flavus, is specific for L-tyrosine. It contains three domains - an adenylation domain, a peptidyl-carrier protein (PCP) domain, and a reductase domain, and requires activation by attachment of a phosphopantetheinyl group. The enzyme activates its substrate to an adenylate form, followed by a transfer to the PCP domain. The resulting thioester is subsequently transferred to the reductase domain, where it is reduced to the aldehyde.

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


1. Forseth, R.R., Amaike, S., Schwenk, D., Affeldt, K.J., Hoffmeister, D., Schroeder, F.C. and Keller, N.P. Homologous NRPS-like gene clusters mediate redundant small-molecule biosynthesis in Aspergillus flavus. Angew Chem Int Ed Engl 52 (2013) 1590-1594. [PMID: 23281040]

[EC created 2018]

Return to EC 1.2.1 home page
Return to EC 1.2 home page
Return to EC 1 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page