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In enzymology, a vitexin 2"-O-rhamnoside 7-O-methyltransferase (EC 2.1.1.153) is an enzyme that catalyzes the chemical reaction

S-adenosyl-L-methionine + vitexin 2"-O-beta-L-rhamnoside ${\displaystyle \rightleftharpoons }$ S-adenosyl-L-homocysteine + 7-O-methylvitexin 2"-O-beta-L-rhamnoside

Thus, the two substrates of this enzyme are S-adenosyl methionine and vitexin 2"-O-beta-L-rhamnoside, whereas its two products are S-adenosylhomocysteine and 7-O-methylvitexin 2"-O-beta-L-rhamnoside.

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:vitexin-2"-O-beta-L-rhamnoside 7-O-methyltransferase.

References

• Knogge W, Weissenbock G (1984). "Purification, characterization, and kinetic mechanism of S-adenosyl-L-methionine: vitexin 2"-O-rhamnoside 7-O-methyltransferase of Avena sativa L". Eur. J. Biochem. 140 (1): 113–8. doi:10.1111/j.1432-1033.1984.tb08073.x. PMID 6705789.

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