steroid 21-monooxygenase activity
Catalysis of the reaction: A C(21) steroid + [reduced NADPH--hemoprotein reductase] + O2 = a 21-hydroxy-C(21)-steroid + [oxidized NADPH--hemoprotein reductase] + H2O.
GO:0008395
steroid hydroxylase activity
is_a
GO:0016712
oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen
is_a
21-hydroxylase activity
related
cytochrome P450 CYP21A1
narrow
cytochrome p450 XXIA1 activity
narrow
steroid 21-hydroxylase activity
exact
steroid,hydrogen-donor:oxygen oxidoreductase (21-hydroxylating)
related