PAF1 regulation of promoter-proximal pause release via enhancer activation.

PAF1 regulation of promoter-proximal pause release via enhancer activation.
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DOI:
10.1126/science.aan3269
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发表时间:
2017-09-22
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Shilatifard A
Shilatifard A
中科院分区:
其他
文献类型:
--
作者:
Chen FX;Xie P;Collings CK;Cao K;Aoi Y;Marshall SA;Rendleman EJ;Ugarenko M;Ozark PA;Zhang A;Shiekhattar R;Smith ER;Zhang MQ;Shilatifard A

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后生动物的基因表达受RNA聚合酶II(Pol II)启动子近端暂停及其释放的调控。以前,我们发现,Pol II相关因子1(PAF1)调节暂停Pol II的释放到生产性延长。在这里,我们发现,PAF1占据转录增强子和抑制这些增强子的一个子集的超活化。增强子激活作为PAF1损失的结果,从附近PAF1靶基因的暂停启动子释放Pol II。PAF1调节增强子的敲除减弱了PAF1靶基因上暂停的Pol II的释放,而没有在其同源启动子处建立暂停的主要干扰。因此,增强子的子集可以主要通过以PAF 1依赖性方式控制暂停的Pol II的释放来调节基因表达。
Gene expression in metazoans is regulated by RNA Polymerase II (Pol II) promoter-proximal pausing and its release. Previously, we identified that Pol II-associated factor 1 (PAF1) modulates the release of paused Pol II into productive elongation. Here, we find that PAF1 occupies transcriptional enhancers and restrains hyperactivation of a subset of these enhancers. Enhancer activation as the result of PAF1 loss releases Pol II from paused promoters of nearby PAF1 target genes. Knockout of PAF1-regulated enhancers attenuates the release of paused Pol II on PAF1 target genes without major interference in the establishment of pausing at their cognate promoters. Thus, a subset of enhancers can primarily modulate gene expression by controlling the release of paused Pol II in a PAF1-dependent manner.
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