quercetin 3-O-methyltransferase activity
Catalysis of the reaction: S-adenosyl-L-methionine + 3,5,7,3',4'-pentahydroxyflavone = S-adenosyl-L-homocysteine + 3-methoxy-5,7,3',4'-tetrahydroxy-flavone.
GO:0008757
S-adenosylmethionine-dependent methyltransferase activity
is_a
S-adenosyl-L-methionine:3,5,7,3',4'-pentahydroxyflavone 3-O-methyltransferase activity
related
flavonoid 3-methyltransferase activity
related
flavonol 3-O-methyltransferase activity
related