In enzymology, a loganate O-methyltransferase (EC 2.1.1.50) is an enzyme that catalyzes the chemical reaction.
Thus, the two substrates of this enzyme are S-adenosyl methionine and loganic acid (also called loganate), whereas its two products are S-adenosylhomocysteine and loganin.
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:loganate 11-O-methyltransferase.
This enzyme participates in terpene indole and ipecac alkaloid biosynthesis.