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依赖ATP的染色质物理修饰 被引量:6

ATP-Dependent Physical Remodeling of Chromatin
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摘要 染色质重塑是基因表达调控过程中一个非常重要的环节 .染色质重塑主要包括 2种类型 :一种是依赖ATP的物理修饰 ,另一种是依赖共价结合反应的化学修饰 .依赖ATP的物理修饰主要是利用ATP水解释放的能量 ,使DNA超螺旋旋矩和旋相发生变化 ,使转录因子更易接近并结合核小体DNA 。 Chromatin remodeling is an integral part of the process involved in gene transcriptional regulation. Chromatin remodeling is achieved through ATP dependent physical modifications and covalent chemical reactions. ATP dependent chromatin remodeling factors use the energy of ATP hydrolysis to introduce superhelical torsion into DNA and to alter the rotational phasing of the DNA on the surface of the histone octamer, thus to increase the accessibility of the nucleosomal DNA to transcription factors and restriction enzymes.
作者 易霞 尚永丰
出处 《中国生物化学与分子生物学报》 CAS CSCD 北大核心 2003年第4期418-422,共5页 Chinese Journal of Biochemistry and Molecular Biology
基金 国家高科技研究发展计划资助项目 (863计划 ) (No .2002BA711A0 1 0 5 ) 国家杰出青年科学基金资助项目(No .3 0 2 2 5 0 43 )~~
关键词 染色质 物理修饰 染色质重塑 核小体 组蛋白 ATP酶 chromatin remodeling, nucleosome, histone, ATPase
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