Steroid hydroxylase

Corticosteroid biosynthetic pathway in rat

Steroid hydroxylases are a class of hydroxylase enzymes involved in the biosynthesis of steroids.

Additional images

Steroid hydroxylases at the US National Library of Medicine Medical Subject Headings (MeSH)

To HMG-CoA	Acetyl-Coenzyme A acetyltransferase HMG-CoA synthase (regulated step)
Ketogenesis	HMG-CoA lyase 3-hydroxybutyrate dehydrogenase Thiophorase
To Mevalonic acid	HMG-CoA reductase
To DMAPP	Mevalonate kinase Phosphomevalonate kinase Pyrophosphomevalonate decarboxylase Isopentenyl-diphosphate delta isomerase
Geranyl-	Dimethylallyltranstransferase Geranyl pyrophosphate

To lanosterol	Farnesyl-diphosphate farnesyltransferase Squalene monooxygenase Lanosterol synthase
7-Dehydrocholesterol path	Lanosterol 14α-demethylase Sterol-C5-desaturase-like 7-Dehydrocholesterol reductase
Desmosterol path	24-Dehydrocholesterol reductase

To androgens	17α-Hydroxylase 17,20-Lyase 3β-HSD 17β-HSD 5α-Reductase 1 2
To estrogens	Aromatase 17β-HSD

Other/ungrouped

Oxidoreductases: dioxygenases, including steroid hydroxylases (EC 1.14)
1.14.11: 2-oxoglutarate	Prolyl hydroxylase Lysyl hydroxylase
1.14.13: NADH or NADPH	Flavin-containing monooxygenase FMO1 FMO2 FMO3 FMO4 FMO5 Nitric oxide synthase NOS1 NOS2 NOS3 Cholesterol 7 alpha-hydroxylase Methane monooxygenase 3A4 Lanosterol 14 alpha-demethylase 24-hydroxycholesterol 7α-hydroxylase
1.14.14: reduced flavin or flavoprotein	19A1 2D6 2E1
1.14.15: reduced iron-sulfur protein	11B1 11B2 11A1
1.14.16: reduced pteridine (BH4 dependent)	Phenylalanine hydroxylase Tyrosine hydroxylase Tryptophan hydroxylase
1.14.17: reduced ascorbate	Dopamine beta-hydroxylase
1.14.18-19: other	Tyrosinase Stearoyl-CoA desaturase-1
1.14.99 - miscellaneous	Cyclooxygenase Heme oxygenase (HMOX1) Squalene monooxygenase 17A1 21A2

Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list)

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