| Literature DB >> 28860207 |
Fei Xavier Chen1, Peng Xie2, Clayton K Collings1, Kaixiang Cao1, Yuki Aoi1, Stacy A Marshall1, Emily J Rendleman1, Michal Ugarenko1, Patrick A Ozark1, Anda Zhang3, Ramin Shiekhattar3, Edwin R Smith1, Michael Q Zhang2,4, Ali Shilatifard5,6.
Abstract
Gene expression in metazoans is regulated by RNA polymerase II (Pol II) promoter-proximal pausing and its release. Previously, we showed that Pol II-associated factor 1 (PAF1) modulates the release of paused Pol II into productive elongation. Here, we found 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.Entities:
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Year: 2017 PMID: 28860207 PMCID: PMC6055228 DOI: 10.1126/science.aan3269
Source DB: PubMed Journal: Science ISSN: 0036-8075 Impact factor: 47.728