Tags: Enzyme.
In enzymology a sterol-4alpha-carboxylate 3-dehydrogenase (decarboxylating) (EC 1.1.1.170) is an enzyme that catalyzes the chemical reaction3beta-hydroxy-4beta-methyl-5alpha-cholest-7-ene-4alpha-carboxylate + NAD(P)+ 4alpha-methyl-5alpha-cholest-7-en-3-one + CO2 + NAD(P)HThe 3 substrates of this enzyme are 3beta-hydroxy-4beta-methyl-5alpha-cholest-7-ene-4alpha-carboxylate NAD+ and NADP+ whereas its 4 products are 4alpha-methyl-5alpha-cholest-7-en-3-one CO2 NADH and NADPH.This enzyme belongs to the family of oxidoreductases specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor.