In Situ Capture of Chromatin Interactions by Biotinylated dCas9.

In Situ Capture of Chromatin Interactions by Biotinylated dCas9.
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通过生物素化 dCas9 原位捕获染色质相互作用

DOI:
10.1016/j.cell.2017.08.003
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发表时间:
2017-08-24
期刊:
影响因子:
64.5
通讯作者:
Xu J
Xu J
中科院分区:
生物学1区
文献类型:
--
作者:
Liu X;Zhang Y;Chen Y;Li M;Zhou F;Li K;Cao H;Ni M;Liu Y;Gu Z;Dickerson KE;Xie S;Hon GC;Xuan Z;Zhang MQ;Shao Z;Xu J

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Cis-regulatory elements (CREs) are commonly recognized by correlative chromatin features, yet the molecular composition of the vast majority of CREs in chromatin remains unknown. Here we describe a CRISPR affinity purification in situ of regulatory elements (CAPTURE) approach to unbiasedly identify locus-specific chromatin-regulating protein complexes and long-range DNA interactions. Using an in vivo biotinylated nuclease-deficient Cas9 protein and sequence-specific guide RNAs, we show high-resolution and selective isolation of chromatin interactions at a single copy genomic locus. Purification of human telomeres using CAPTURE identifies known and new telomeric factors. In situ capture of individual constituents of the enhancer cluster controlling human β-globin genes establishes evidence for composition-based hierarchical organization. Furthermore, unbiased analysis of chromatin interactions at disease-associated cis-elements and developmentally regulated super-enhancers reveals spatial features causally control gene transcription. Thus, comprehensive and unbiased analysis of locus-specific regulatory composition provides mechanistic insight into genome structure and function in development and disease.
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