Demethylmenaquinone methyltransferase

Demethylmenaquinone methyltransferase (EC 2.1.1.163, S-adenosyl-L-methione-DMK methyltransferase, demethylmenaquinone C-methylase, 2-heptaprenyl-1,4-naphthoquinone methyltransferase, 2-demethylmenaquinone methyltransferase, S-adenosyl-L-methione:2-demethylmenaquinone methyltransferase) is an enzyme with systematic name S-adenosyl-L-methione:demethylmenaquinone methyltransferase. This enzyme catalyses the following chemical reaction

demethylmenaquinol + S-adenosyl-L-methionine ⇌ menaquinol + S-adenosyl-L-homocysteine

The enzyme catalyses the last step in menaquinone biosynthesis.