3-beta-hydroxysteroid dehydrogenase [NAD(P)+]/C4-decarboxylase activity
3-beta-hydroxysteroid dehydrogenase [nad(p)+]/c4-decarboxylase activity
Catalysis of the reaction: a 3-beta-hydroxysteroid-4-alpha-carboxylate + NADP+ = a 3-oxosteroid + CO2 + NADPH.