Details:
Catalysis of the reaction: a 3-beta-hydroxyl sterol + NADP+ = a 3-keto sterol + NADPH + H(+). [EC:1.1.1.270, GOC:mah, MetaCyc:1.1.1.270-RXN, MetaCyc:RXN3O-4110, MetaCyc:RXN66-19, MetaCyc:RXN66-24, MetaCyc:RXN66-314, MetaCyc:RXN66-319, PMID:9811880]