IUBMB Enzyme Nomenclature


Accepted name: 2-hydroxy-5-methyl-1-naphthoate 7-hydroxylase

Reaction: 2-hydroxy-5-methyl-1-naphthoate + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ + O2 = 2,7-dihydroxy-5-methyl-1-naphthoate + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O

For diagram of reaction click here.

Other name(s): NcsB3

Systematic name: 2-hydroxy-5-methyl-1-naphthoate,reduced ferredoxin:oxygen oxidoreductase (7-hydroxylating)

Comments: A cytochrome P-450 (heme-thiolate) protein involved in the synthesis of neocarzinostatin in the bacterium Streptomyces carzinostaticus.

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


1. Hang, V.T.T., Oh, T.J., Yamaguchi, T. and Sohng, J.K. In vivo characterization of NcsB3 to establish the complete biosynthesis of the naphthoic acid moiety of the neocarzinostatin chromophore. FEMS Microbiol. Lett. 311 (2010) 119-125. [PMID: 20735485]

[EC created 2014 as EC, transferred 2018 to EC]

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