Tags: Enzyme.
In enzymology a 3-methyl-2-oxobutanoate dehydrogenase (EC 1.2.4.4) is an enzyme that catalyzes the chemical reaction3-methyl-2-oxobutanoate + [dihydrolipoyllysine-residue (2-methylpropanoyl)transferase] lipoyllysine [dihydrolipoyllysine-residue (2-methylpropanoyl)transferase] S-(2-methylpropanoyl)dihydrolipoyllysine + CO2The 3 substrates of this enzyme are 3-methyl-2-oxobutanoate dihydrolipoyllysine-residue (2-methylpropanoyl)transferase and lipoyllysine whereas its 3 products are dihydrolipoyllysine-residue (2-methylpropanoyl)transferase S-(2-methylpropanoyl)dihydrolipoyllysine and CO2.This enzyme belongs to the family of oxidoreductases specifically those acting on the aldehyde or oxo group of donor with a disulfide as acceptor.