In enzymology, a steroid 9alpha-monooxygenase (EC 1.14.99.24) is an enzyme that catalyzes the chemical reaction
| steroid 9-alpha-monooxygenase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Steroid 9alpha-monooxygenase reaction | |||||||||
| Identifiers | |||||||||
| EC no. | 1.14.99.24 | ||||||||
| CAS no. | 82869-33-8 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
| |||||||||
- pregna-4,9(11)-diene-3,20-dione + AH2 + O2 9,11alpha-epoxypregn-4-ene-3,20-dione + A + H2O
The 3 substrates of this enzyme are pregna-4,9(11)-diene-3,20-dione, an electron acceptor AH2, and O2, whereas its 3 products are 9,11alpha-epoxypregn-4-ene-3,20-dione, the reduction product A, and H2O.
This enzyme belongs to the family of oxidoreductases, specifically those acting on paired donors, with O2 as oxidant and incorporation or reduction of oxygen. The oxygen incorporated need not be derive from O miscellaneous. The systematic name of this enzyme class is steroid,hydrogen-donor:oxygen oxidoreductase (9-epoxidizing). This enzyme is also called steroid 9alpha-hydroxylase. It has 2 cofactors: FMN, and Iron-sulfur.
References edit
- Strijewski A (November 1982). "The steroid-9 alpha-hydroxylation system from Nocardia species". European Journal of Biochemistry. 128 (1): 125–35. doi:10.1111/j.1432-1033.1982.tb06942.x. PMID 7173200.
