Demethylmenaquinone methyltransferase

The enzyme catalyzes the last step in menaquinone biosynthesis.

Source:http://purl.uniprot.org/enzyme/2.1.1.163

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It is able to accept substrates with varying polyprenyl side chain length (the chain length is determined by polyprenyl diphosphate synthase)., The enzyme catalyzes the last step in menaquinone biosynthesis., The enzyme from Escherichia coli also catalyzes the conversion of 2-methoxy-6-octaprenyl-1,4-benzoquinone to 5-methoxy-2-methyl-3-octaprenyl-1,4-benzoquinone during the biosynthesis of ubiquinone., The enzyme probably acts on menaquinol rather than menaquinone.
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2-demethylmenaquinone methyltransferase, 2-heptaprenyl-1,4-naphthoquinone methyltransferase, Demethylmenaquinone C-methylase, Demethylmenaquinone methyltransferase
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A demethylmenaquinone + S-adenosyl-L-methionine = a menaquinol + S-adenosyl-L-homocysteine.