. "Catalysis of the reaction: S-adenosyl-L-methionine + protein L-histidine = S-adenosyl-L-homocysteine + protein N-methyl-L-histidine." . . . "protein-histidine N-methyltransferase activity" . "actin-specific histidine methyltransferase activity" . "peptidyl-histidine N-methyltransferase activity" . "protein (histidine) methyltransferase activity" . "protein methylase IV activity" . "S-adenosyl methionine:protein-histidine N-methyltransferase activity" . "S-adenosyl-L-methionine:protein-L-histidine N-tele-methyltransferase activity" . . .