Epigenome Regulation by Dynamic Nucleosome Unwrapping.
Epigenome Regulation by Dynamic Nucleosome Unwrapping.
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通过动态核小体解包进行表观基因组调控。
DOI:
10.1016/j.tibs.2019.09.003
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发表时间:
2020-01
影响因子:
13.8
通讯作者:
Henikoff, Steven
中科院分区:
文献类型:
--
作者:
Brahma, Sandipan;Henikoff, Steven
Gene regulation in eukaryotes requires the controlled access of sequence-specific transcription factors (TFs) to their sites in a chromatin landscape dominated by nucleosomes. Nucleosomes are refractory to TF binding, and often must be removed from regulatory regions. Recent genomic studies together with in vitro measurements suggest that the nucleosome barrier to TF binding is modulated by dynamic nucleosome unwrapping governed by ATP-dependent chromatin remodelers. Genome-wide occupancy and regulation of subnucleosomal intermediates have gained recent attention with the application of high-resolution approaches for precision mapping of protein-DNA interactions. Here we summarize recent findings on nucleosome substructures and TF-binding dynamics, and highlight how unwrapped nucleosomal intermediates provide a novel signature of active chromatin.
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