ID 2.3.3.17 DE methylthioalkylmalate synthase. CA acetyl-CoA + an omega-(methylsulfanyl)-2-oxoalkanoate + H2O = a 2-(omega- CA methylsulfanyl)alkylmalate + CoA + H(+). CC -!- The enzyme, characterized from the plant Arabidopsis thaliana, CC is involved in the L-methionine side-chain elongation pathway, CC forming substrates for the biosynthesis of aliphatic glucosinolates. CC -!- Two forms are known - MAM1 catalyzes only only the first two rounds CC of methionine chain elongation, while MAM3 catalyzes all six cycles, CC up to formation of L-hexahomomethionine. DR Q9FG67, MAM1_ARATH ; Q8VX04, MAM2_ARATH ; Q9FN52, MAM3_ARATH ; //