Reaction catalyzed by [histone H3]-lysine27 N-methyltransferase (2.1.1.369)

		+		[histone H3.1]-L-lysine27	=			+
	S-adenosyl-L-methionine	+		[histone H3.1]-L-lysine27	=		S-adenosyl-L-homocysteine	+		[histone H3.1]-N6-methyl-L-lysine27