(S)-tetrahydroprotoberberine N-methyltransferase

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In enzymology, a (S)-tetrahydroprotoberberine N-methyltransferase (EC is an enzyme that catalyzes the chemical reaction

S-adenosyl-L-methionine + (S)-7,8,13,14-tetrahydroprotoberberine S-adenosyl-L-homocysteine + cis-N-methyl-(S)-7,8,13,14-tetrahydroprotoberberine

Thus, the two substrates of this enzyme are S-adenosyl methionine and (S)-7,8,13,14-tetrahydroprotoberberine, whereas its two products are S-adenosylhomocysteine and cis-N-methyl-(S)-7,8,13,14-tetrahydroprotoberberine.

This enzyme belongs to the family of transferases, specifically those transferring one-carbon group methyltransferases. The systematic name of this enzyme class is S-adenosyl-L-methionine:(S)-7,8,13,14-tetrahydroprotoberberine cis-N-methyltransferase. This enzyme is also called tetrahydroprotoberberine cis-N-methyltransferase. This enzyme participates in alkaloid biosynthesis i.


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  • Rueffer M, Zumstein G, Zenk MH (1990). "Partial purification and characterization of S-adenosyl-L-methionine:(S)-tetrahydroprotoberberine cis-N-methyltransferase from suspension-cultured cells of Eschscholtzia and Corydalis". Phytochemistry. 29: 3727&ndash, 3733.

External links

The CAS registry number for this enzyme class is 106878-42-6.

Gene Ontology (GO) codes