Tricetin 3',4',5'-O-trimethyltransferase

Tricetin 3',4',5'-O-trimethyltransferase (, FOMT, TaOMT1, TaCOMT1, TaOMT2) is an enzyme with systematic name S-adenosyl-L-methionine:tricetin 3',4',5'-O-trimethyltransferase. This enzyme catalyses the following chemical reaction


 * 3 S-adenosyl-L-methionine + tricetin $$\rightleftharpoons$$ 3 S-adenosyl-L-homocysteine + 3',4',5'-O-trimethyltricetin (overall reaction)
 * (1a) S-adenosyl-L-methionine + tricetin $$\rightleftharpoons$$ S-adenosyl-L-homocysteine + 3'-O-methyltricetin
 * (1b) S-adenosyl-L-methionine + 3'-O-methyltricetin $$\rightleftharpoons$$ S-adenosyl-L-homocysteine + 3',5'-O-dimethyltricetin
 * (1c) S-adenosyl-L-methionine + 3',5'-O-dimethyltricetin $$\rightleftharpoons$$ S-adenosyl-L-homocysteine + 3',4',5'-O-trimethyltricetin

The enzyme from Triticum aestivum catalyses the sequential O-methylation of tricetin via 3'-O-methyltricetin, 3',5'-O-methyltricetin to 3',4',5'-O-trimethyltricetin.