ID 1.1.1.n5 DE 3-methylmalate dehydrogenase. CA (2R,3S)-3-methylmalate + NAD(+) = 2-oxobutanoate + CO2 + NADH. CC -!- The enzyme from Methanocaldococcus jannaschii also catalyzes the CC reaction of EC 1.1.1.85 and EC 1.1.1.83. DR Q58130, LEU3_METJA ; //