The enzyme 3 beta-hydroxysteroid dehydrogenase/5-ene-4-ene
isomerase (3 beta-HSD) catalyses the oxidation and isomerisation
of 5-ene-3 beta-hydroxypregnene and 5-ene-hydroxyandrostene
steroid precursors into the corresponding 4-ene-ketosteroids necessary
for the formation of all classes of steroid hormones.
3Beta_HSD
Labrie F, Simard J, Luu-The V, Pelletier G, Belanger A, Lachance Y, Zhao HF, Labrie C, Breton N, de Launoit Y.
Structure and tissue-specific expression of 3 beta-hydroxysteroid dehydrogenase/5-ene-4-ene isomerase genes in human and rat classical and peripheral steroidogenic tissues.
J. Steroid Biochem. Mol. Biol. 41 1992 421-35
[PubMed: 1562516] http://dx.doi.org/10.1016/0960-0760(92)90368-S