label: caffeate O-methyltransferase activity
label_lc: caffeate o-methyltransferase activity
description: "Catalysis of the reaction: S-adenosyl-L-methionine + 3,4-dihydroxy-trans-cinnamate = S-adenosyl-L-homocysteine + 3-methoxy-4-hydroxy-trans-cinnamate."