FEATURES

FAMILY

DESCRIPTION

Also known as MEGL_PSEPU, mdeA. Catalyzes the alpha, gamma-elimination of L-methionine to produce methanethiol, 2-oxobutanoate and ammonia (PubMed:8586629, PubMed:6742420). 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:6742420, PubMed:22785484). 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:6742420, PubMed:22785484). Homotetramer; dimer of active dimers.

EXTERNAL LINKS

mdeA

L-methionine gamma-lyase

mdeA

Molecular Synopsis