6-carboxymethyl-5-methyl-4-hydroxypyridin-2-ol 3-C-methyltransferase activity
Catalysis of the reaction: 6-carboxymethyl-5-methyl-4-hydroxypyridin-2-ol + S-adenosyl-L-methionine = 6-carboxymethyl-3,5-dimethyl-4-hydroxypyridin-2-ol + S-adenosyl-L-homocysteine + H+.
GO:0008168
methyltransferase activity
is_a