ID 2.1.1.371 DE [histone H3]-lysine(27) N-dimethyltransferase. CA L-lysyl(27)-[histone H3] + 2 S-adenosyl-L-methionine = 2 H(+) + CA N(6),N(6)-dimethyl-L-lysyl(27)-[histone H3] + 2 S-adenosyl-L- CA homocysteine. CC -!- This entry describes enzymes that successively methylate the CC L-lysine(27) residue of histone H3 (H3K27) twice, ultimately CC generating a dimethylated form. CC -!- These modifications influence the binding of chromatin-associated CC proteins. CC -!- The human NSD3 protein also catalyzes the activity of EC 2.1.1.370. CC Cf. EC 2.1.1.356 and EC 2.1.1.369. DR Q9BZ95, NSD3_HUMAN ; Q6P2L6, NSD3_MOUSE ; //