RNA polymerase II-associated factor 1 regulates the release and phosphorylation of paused RNA polymerase II.

RNA polymerase II-associated factor 1 regulates the release and phosphorylation of paused RNA polymerase II.
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RNA 聚合酶 II 相关因子 1 调节暂停的 RNA 聚合酶 II 的释放和磷酸化。

DOI:
10.1126/science.aad2338
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发表时间:
2015-12-11
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Roeder RG
Roeder RG
中科院分区:
其他
文献类型:
--
作者:
Yu M;Yang W;Ni T;Tang Z;Nakadai T;Zhu J;Roeder RG

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启动子-近端暂停RNA聚合酶II (Pol II)在早期伸长期间的释放是后生动物细胞转录调控的关键步骤。暂停的Pol II释放被认为需要细胞周期蛋白依赖性激酶9 (CDK9)的激酶活性来磷酸化Pol II的5,6-二氯-1-β- d -核糖呋喃基苯并咪唑(DRB)敏感诱导因子(DSIF)、负延伸因子(NELF)和c -末端结构域(CTD)丝氨酸-2。在这里,我们证明了Pol II相关因子1 (PAF1)是暂停Pol II释放的关键调节剂,正转录延伸因子b (P-TEFb)直接调节PAF1复合物(PAF1C)对基因的初始募集,并且随后CDK12的募集依赖于PAF1C。这些发现揭示了P-TEFb、PAF1C和CDK12在暂停释放和Pol II CTD磷酸化方面的协同作用。
Release of promoter-proximal paused RNA polymerase II (Pol II) during early elongation is a critical step in transcriptional regulation in metazoan cells. Paused Pol II release is thought to require the kinase activity of cyclin-dependent kinase 9 (CDK9) for the phosphorylation of 5,6-dichloro-1-β-D-ribofuranosylbenzimidazole (DRB) sensitivity-inducing factor (DSIF), negative elongation factor (NELF), and C-terminal domain (CTD) serine-2 of Pol II. Here we demonstrate that Pol II-associated factor 1 (PAF1) is a critical regulator of paused Pol II release, that positive transcription elongation factor b (P-TEFb) directly regulates the initial recruitment of PAF1 complex (PAF1C) to genes, and that the subsequent recruitment of CDK12 is dependent on PAF1C. These findings reveal cooperativity between P-TEFb, PAF1C, and CDK12 in pausing release and Pol II CTD phosphorylation.
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