L-methionine gamma-lyase

UniProtKB accession:  P13254

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UniProtKB description:  Catalyzes the alpha,gamma-elimination of L-methionine to produce methanethiol, 2-oxobutanoate and ammonia (PubMed:6742420, PubMed:8586629). Is involved in L-methionine catabolism (PubMed:9190812). In fact, shows a multicatalytic function since it also catalyzes gamma-replacement of L-methionine with thiol compounds, alpha,gamma-elimination and gamma-replacement reactions of L-homocysteine and its S-substituted derivatives, O-substituted-L-homoserines and DL-selenomethionine, and, to a lesser extent, alpha,beta-elimination and beta-replacement reactions of L-cysteine, S-methyl-L-cysteine, and O-acetyl-L-serine (PubMed:22785484, PubMed:6742420). Also catalyzes deamination and gamma-addition reactions of L-vinylglycine (PubMed:6742420). Thus, the enzyme is able to cleave C-S, C-Se, and C-O bonds of sulfur, selenium, and oxygen amino acids, respectively (PubMed:22785484, PubMed:6742420).