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EC 1.14.99.24 Details

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EC number

1.14.99.24

Accepted name

steroid 9α-monooxygenase

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)

CAS registry number

82869-33-8

Comment

An enzyme system involving a flavoprotein (FMN) and two iron-sulfur proteins.

History

created 1986

EC Tree

1 Oxidoreductases

1.1 Acting on the CH-OH group of donors

1.2 Acting on the aldehyde or oxo group of donors

1.3 Acting on the CH-CH group of donors

1.4 Acting on the CH-NH₂ group of donors

1.5 Acting on the CH-NH group of donors

1.6 Acting on NADH or NADPH

1.7 Acting on other nitrogenous compounds as donors

1.8 Acting on a sulfur group of donors

1.9 Acting on a heme group of donors

1.10 Acting on diphenols and related substances as donors

1.11 Acting on a peroxide as acceptor

1.11.1 Peroxidases

1.11.2 Peroxygenases

1.12 Acting on hydrogen as donor

1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases)

1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen

1.15 Acting on superoxide as acceptor

1.16 Oxidizing metal ions

1.16.1 With NAD⁺ or NADP⁺ as acceptor

1.16.1.1 mercury(II) reductase

1.16.1.2 diferric-transferrin reductase

1.16.1.3 aquacobalamin reductase

1.16.1.4 cob(II)alamin reductase

1.16.1.5 aquacobalamin reductase (NADPH)

1.16.1.6 cyanocobalamin reductase

1.16.1.7 ferric-chelate reductase (NADH)

1.16.1.8 [methionine synthase] reductase

1.16.1.9 ferric-chelate reductase (NADPH)

1.16.1.10 ferric-chelate reductase [NAD(P)H]

1.16.3 With oxygen as acceptor

1.16.5 With a quinone or similar compound as acceptor

1.16.8 With a flavin as acceptor

1.16.9 With a copper protein as acceptor

1.16.98 With other, known, physiological acceptors

1.16.99 With unknown physiological acceptors

1.17 Acting on CH or CH₂ groups

1.18 Acting on iron-sulfur proteins as donors

1.19 Acting on reduced flavodoxin as donor

1.20 Acting on phosphorus or arsenic in donors

1.21 Catalysing the reaction X-H + Y-H = X-Y

1.22 Acting on halogen in donors

1.22.1 With NAD⁺ or NADP⁺ as acceptor

1.23 Reducing C-O-C group as acceptor

1.97 Other oxidoreductases

1.98 Enzymes using H₂ as reductant (deleted subclass)

1.99 Other enzymes using O₂ as oxidant (deleted subclass)

2.1 Transferring one-carbon groups

2.2 Transferring aldehyde or ketonic groups

2.3 Acyltransferases

2.4 Glycosyltransferases

2.5 Transferring alkyl or aryl groups, other than methyl groups

2.6 Transferring nitrogenous groups

2.7 Transferring phosphorus-containing groups

2.8 Transferring sulfur-containing groups

2.9 Transferring selenium-containing groups

2.10 Transferring molybdenum- or tungsten-containing groups

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Release 2023.1 (January 2023)