Reaction: pregna-4,9(11)-diene-3,20-dione + reduced acceptor + O2 = 9,11α-epoxypregn-4-ene-3,20-dione + acceptor + H2O
Other name(s): steroid 9α-hydroxylase
Systematic name: steroid,hydrogen-donor:oxygen oxidoreductase (9-epoxidizing)
Comments: An enzyme system involving a flavoprotein (FMN) and two iron-sulfur proteins.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 82869-33-8
References:
1. Strijewski, A. The steroid-9α-hydroxylation system from Nocardia species. Eur. J. Biochem. 128 (1982) 125-135. [PMID: 7173200]