Tags: Enzyme.
In enzymology a dimethylhistidine N-methyltransferase (EC 2.1.1.44) is an enzyme that catalyzes the chemical reactionS-adenosyl-L-methionine + NalphaNalpha-dimethyl-L-histidine S-adenosyl-L-homocysteine + NalphaNalphaNalpha-trimethyl-L-histidineThus the two substrates of this enzyme are S-adenosyl methionine and NalphaNalpha-dimethyl-L-histidine whereas its two products are S-adenosylhomocysteine and NalphaNalphaNalpha-trimethyl-L-histidine.This enzyme belongs to the family of transferases specifically those transferring one-carbon group methyltransferases.