3 beta-hydroxysteroid dehydrogenase type 7 (HSD3B7)

The 3-beta-HSD enzymatic system plays a crucial role in the biosynthesis of all classes of hormonal steroids. HSD VII is active against four 7-alpha-hydroxylated sterols.

Doesn't metabolize several different C(19/21) steroids as substrates. Involved in bile acid synthesis (PubMed:11067870).