Tags: Enzyme.
In enzymology a (S)-tetrahydroprotoberberine N-methyltransferase (EC 2.1.1.122) is an enzyme that catalyzes the chemical reactionS-adenosyl-L-methionine + (S)-781314-tetrahydroprotoberberine S-adenosyl-L-homocysteine + cis-N-methyl-(S)-781314-tetrahydroprotoberberineThus the two substrates of this enzyme are S-adenosyl methionine and (S)-781314-tetrahydroprotoberberine whereas its two products are S-adenosylhomocysteine and cis-N-methyl-(S)-781314-tetrahydroprotoberberine.This enzyme belongs to the family of transferases specifically those transferring one-carbon group methyltransferases.