loganate O-methyltransferase

{{infobox enzyme

| Name = loganate O-methyltransferase

| EC_number = 2.1.1.50

| CAS_number = 39391-10-1

| GO_code = 0030749

| image =

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| caption =

}}

In enzymology, a loganate O-methyltransferase ({{EC number|2.1.1.50}}) is an enzyme that catalyzes the chemical reaction.

:S-adenosyl-L-methionine + loganic acid $\backslash rightleftharpoons$ S-adenosyl-L-homocysteine + loganin

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. Other names in common use include loganate methyltransferase and S-adenosyl-L-methionine:loganic acid methyltransferase. This enzyme participates in terpene indole and ipecac alkaloid biosynthesis.