产品内容
本酶催化的反应为2 S-Adenosyl-L-Methionine + A [Histone H3]-L-Lysine27 = 2 S-Adenosyl-L-Homocysteine + A [Histone H3]-N6,N6-Dimethyl-L-Lysine27 (Overall Reaction);;(1a) S-Adenosyl-L-Methionine + A [Histone H3]-L-Lysine27 = S-Adenosyl-L-Homocysteine + A [Histone H3]-N6-Methyl-L-Lysine27;;(1b) S-Adenosyl-L-Methionine + A [Histone H3]-N6-Methyl-L-Lysine27 = S-Adenosyl-L-Homocysteine + A [Histone H3]-N6,N6-Dimethyl-L-Lysine27,系统名称为S-Adenosyl-L-Methionine:[histone H3]-L-Lysine27 N6-Dimethyltransferase,本条描述将组蛋白 H3 的 L-赖氨酸27 残基(H3K27)连续甲基化两次、最终生成二甲基化形式的酶。这些修饰影响染色质相关蛋白的结合。人 NSD3 蛋白还催化 EC 2.1.1.370([组蛋白 H3]-赖氨酸4 N-二甲基转移酶)的活性。参见 EC 2.1.1.369([组蛋白 H3]-赖氨酸27 N-甲基转移酶)和 EC 2.1.1.356([组蛋白 H3]-赖氨酸27 N-三甲基转移酶)。