label: 3-beta-hydroxysteroid dehydrogenase/C4-decarboxylase activity
label_lc: 3-beta-hydroxysteroid dehydrogenase/c4-decarboxylase activity
description: "Catalysis of the reaction: a 3beta-hydroxysteroid-4alpha-carboxylate + NAD+ = a 3-oxosteroid + CO2 + NADH."