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:
影响因子:
--
通讯作者:
Shilatifard A
中科院分区:
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
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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