Enhancer-promoter interactions and transcription are largely maintained upon acute loss of CTCF, cohesin, WAPL or YY1.

Enhancer-promoter interactions and transcription are largely maintained upon acute loss of CTCF, cohesin, WAPL or YY1.
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DOI:
10.1038/s41588-022-01223-8
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发表时间:
2022-12
期刊:
影响因子:
30.8
通讯作者:
Tjian, Robert
Tjian, Robert
中科院分区:
生物学1区
文献类型:
--
作者:
Hsieh, Tsung-Han S.;Cattoglio, Claudia;Slobodyanyuk, Elena;Hansen, Anders S.;Darzacq, Xavier;Tjian, Robert

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目前尚不清楚为什么急性消耗的CTCF(CCCTC结合因子)和粘附素只轻微影响大多数基因的表达,尽管实质上扰乱三维(3D)基因组折叠的结构域和结构环的水平。为了解决这个难题,我们在小鼠胚胎干细胞中使用了高分辨率Micro-C和新生转录本分析。我们发现,增强子-启动子(E-P)相互作用在很大程度上对CTCF、粘附素或WAPL的急性(3小时)耗竭不敏感。YY 1被认为是E-P环的结构调节因子,但急性YY 1缺失对E-P环、转录和3D基因组折叠的影响也很小。引人注目的是,活细胞,单分子成像显示,内聚蛋白耗竭减少转录因子(TF)结合染色质。因此,虽然CTCF,cohesin,WAPL或YY 1是不需要的大多数E-P相互作用和基因表达的短期维持,我们的研究结果表明,cohesin可能有助于TF搜索和结合他们的目标更有效。小鼠胚胎干细胞中的Micro-C和新生转录物分析表明,增强子-启动子相互作用对CTCF、粘附素、WAPL或YY 1的急性消耗是稳健的。活细胞,单分子成像显示,内聚蛋白耗竭减少转录因子结合染色质。
It remains unclear why acute depletion of CTCF (CCCTC-binding factor) and cohesin only marginally affects expression of most genes despite substantially perturbing three-dimensional (3D) genome folding at the level of domains and structural loops. To address this conundrum, we used high-resolution Micro-C and nascent transcript profiling in mouse embryonic stem cells. We find that enhancer–promoter (E–P) interactions are largely insensitive to acute (3-h) depletion of CTCF, cohesin or WAPL. YY1 has been proposed as a structural regulator of E–P loops, but acute YY1 depletion also had minimal effects on E–P loops, transcription and 3D genome folding. Strikingly, live-cell, single-molecule imaging revealed that cohesin depletion reduced transcription factor (TF) binding to chromatin. Thus, although CTCF, cohesin, WAPL or YY1 is not required for the short-term maintenance of most E–P interactions and gene expression, our results suggest that cohesin may facilitate TFs to search for and bind their targets more efficiently. Micro-C and nascent transcript profiling in mouse embryonic stem cells shows that enhancer–promoter interactions are robust to acute depletion of CTCF, cohesin, WAPL or YY1. Live-cell, single-molecule imaging shows that cohesin depletion reduces transcription factor binding to chromatin.
在单细胞水平上表观遗传调节的动力学。
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