Enhancer RNAs Mediate Estrogen-Induced Decommissioning of Selective Enhancers by Recruiting ERα and Its Cofactor.

Enhancer RNAs Mediate Estrogen-Induced Decommissioning of Selective Enhancers by Recruiting ERα and Its Cofactor.
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增强剂RNA通过募集ERα及其辅因子介导雌激素诱导的选择性增强子的退役。

DOI:
10.1016/j.celrep.2020.107803
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发表时间:
2020-06-23
期刊:
影响因子:
8.8
通讯作者:
Xu K
Xu K
中科院分区:
生物学1区
文献类型:
--
作者:
Yang M;Lee JH;Zhang Z;De La Rosa R;Bi M;Tan Y;Liao Y;Hong J;Du B;Wu Y;Scheirer J;Hong T;Li W;Fei T;Hsieh CL;Liu Z;Li W;Rosenfeld MG;Xu K

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增强子 RNA (eRNA) 在转录调控中的功能仍然不清楚。通过分析乳腺癌细胞的全基因组新生转录谱,我们鉴定出了一组特殊的 eRNA,它们对于雌激素诱导的转录抑制至关重要。以TM4SF1和EFEMP1的eRNA为范例,我们发现这些RNA分子不仅稳定启动子-增强子相互作用,而且还将配体雌激素受体α(ERα)募集到特定的增强子区域,促进功能性转录复合物的形成,并引起基因沉默。有趣的是,ERα 通过其 DNA 结合域直接与 eRNA 结合。这些 eRNA 有助于形成特定的以 ERα 为中心的转录复合物,并促进组蛋白去甲基酶 KDM2A 的结合,从而将 RNA 聚合酶 II 从指定的增强子中排除并抑制靶基因的转录。我们的工作展示了 eRNA 在调节和完善基因座特异性转录程序方面的作用的完整机制。杨等人。鉴定出一组对雌激素诱导的转录抑制至关重要的 eRNA,它们通过与其 DNA 结合域结合来协助 ERα 的染色质募集,并促进 ERα 与其辅助因子的相互作用,从而导致 RNA 聚合酶 II 的消失。
The function of enhancer RNAs (eRNAs) in transcriptional regulation remains obscure. By analyzing the genome-wide nascent transcript profiles in breast cancer cells, we identify a special group of eRNAs that are essential for estrogen-induced transcriptional repression. Using eRNAs of TM4SF1 and EFEMP1 as the paradigms, we find that these RNA molecules not only stabilize promoter-enhancer interactions but also recruit liganded estrogen receptor α (ERα) to particular enhancer regions, facilitate the formation of a functional transcriptional complex, and cause gene silencing. Interestingly, ERα is shown to directly bind with eRNAs by its DNA-binding domain. These eRNAs help with the formation of a specific ERα-centered transcriptional complex and promote the association of the histone demethylase KDM2A, which dismisses RNA polymerase II from designated enhancers and suppresses the transcription of target genes. Our work demonstrates a complete mechanism underlying the action of eRNAs in modulating and refining the locus-specific transcriptional program. Yang et al. identified a group of eRNAs that are essential for estrogen-induced transcriptional repression by assisting with the chromatin recruitment of ERα through binding to its DNA-binding domain and facilitating the interaction of ERα with its cofactors, which leads to the dismissal of RNA polymerase II.
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