Reaction: androstan-3α,17β-diol + NAD+ = 17β-hydroxyandrostan-3-one + NADH + H+
Other name(s): cortisone reductase; (R)-20-hydroxysteroid dehydrogenase; dehydrogenase, 20β-hydroxy steroid; δ4-3-ketosteroid hydrogenase; 20β-hydroxysteroid dehydrogenase; 3α,20β-hydroxysteroid:NAD+-oxidoreductase; NADH-20β-hydroxysteroid dehydrogenase; 20β-HSD
Systematic name: 3α(or 20β)-hydroxysteroid:NAD+ oxidoreductase
Comments: The 3α-hydroxy group or 20β-hydroxy group of pregnane and androstane steroids can act as donor.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 9028-42-6
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