L-aspartate--L-methionine ligase

UniProtKB accession:  Q2FWC5

Grouped By:  Matching UniProtKB accession

UniProtKB description:  L-amino acid ligase, which preferentially catalyzes the formation of L-aspartyl-L-methionine dipeptide from L-aspartate and L-methionine in the presence of ATP. Less active with L-asparagine and L-methionine as substrates. Less active with L-aspartate and either L-phenylalanine, L-valine, L-leucine or L-isoleucine as substrates. Decreased activity when L-methionine is substituted with seleno-DL-methionine, L-homocysteine, L-methionine sulfoxide, L-methionine sulfoximine and o-acetyl-L-serine. Decreased activity with acetylation of L-methionine amino group. Decreased activity by modification of L-methionine carboxylate to L-methionine methyl ester. No activity when L-methionine is substituted with L-homoserine. No activity with formylation of L-methionine amino group. No activity by modification of L-methionine carboxylate to L-methionine-glycine carboxylate. No activity when L-aspartate substrate is replaced by analogs such as L-homoserine, DL-aspartate beta-methyl ester, L-glutamate or o-acetyl-L-serine. No activity when L-aspartate amino and alpha-carboxylate groups are modified to L-malate, glycine-L-aspartate, L-aspartate-glycine or N-carbamoyl-DL-aspartate. No activity with L-methionine or L-aspartate as sole substrates. No activity in presence of other nucleoside triphosphates including GTP, CTP, UTP, TTP or ITP. Involved in sulfur amino acid metabolism.