3-beta-hydroxy-5-alpha-steroid dehydrogenase (NADP+) activity
3-beta-hydroxy-5-alpha-steroid dehydrogenase (nadp+) activity
Catalysis of the reaction: -3beta-hydroxy-5alpha-pregnane-20-one + NADP+ = 5-alpha-pregnane-3,20-dione + H+ + NADPH.