Catalytic activity:5- (methylthio) -2 ,3-dioxopentyl phosphate + H (2) O = 1 ,2-dihydroxy-5- (methylthio) pent-1-en-3-one + phosphate. ,cofactor:Binds 1 magnesium ion per subunit. ,Function:Bifunctional enzyme that enolizes the substrate to form the intermediate 2-hydroxy-5- (methylthio) -3-oxopent-1-enyl phosphate , which is then dephosphorylated to form the acireductone 1 ,2-dihydroxy-5- (methylthio) pent-1-en-3-one. ,pathway:Amino-acid biosynthesis; L-methionine biosynthesis via salvage pathway; L-methionine from (S) -methyl-5-thio-alpha-D-ribose 1-phosphate: step 3/6. ,pathway:Amino-acid biosynthesis; L-methionine biosynthesis via salvage pathway; L-methionine from (S) -methyl-5-thio-alpha-D-ribose 1-phosphate: step 4/6. ,similarity:Belongs to the HAD-like hydrolase superfamily. MasA/mtnC family. ,subunit:Monomer. ,
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