ID   1.1.1.50
DE   3alpha-hydroxysteroid 3-dehydrogenase (Si-specific).
AN   3alpha-HSD.
AN   3alpha-hydroxysteroid 3-dehydrogenase (B-specific).
AN   3alpha-hydroxysteroid dehydrogenase (B-specific).
AN   hydroxyprostaglandin dehydrogenase.
CA   (1) a 3alpha-hydroxysteroid + NAD(+) = a 3-oxosteroid + H(+) + NADH.
CA   (2) a 3alpha-hydroxysteroid + NADP(+) = a 3-oxosteroid + H(+) + NADPH.
CC   -!- The enzyme acts on androsterone and other 3alpha-hydroxysteroids and
CC       on 9-, 11- and 15-hydroxyprostaglandin.
CC   -!- Si-specific with respect to NAD(+) or NADP(+) (cf. EC 1.1.1.213).
DR   P80702, DIDH_COMTE ;  P80701, DIDH_PSESP ;  P23457, DIDH_RAT   ;
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