核小體改構複合體(Nucleosome remodeling complex)是一類是具有DNA激活的ATP酶活性的複合體,它們通過重構核小體的組蛋白核心或改變DNA 鏈在核小體上的位置來增加啟動子序列與轉錄因子的可接觸性,從而激活基因轉錄。

另一類是組蛋白乙酰轉移酶家族(HATs),可以對核心組蛋白N-端尾巴上的賴氨酸殘基進行乙酰化修飾,以此調節基因轉錄。

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