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:
影响因子:
--
通讯作者:
Roeder RG
中科院分区:
文献类型:
--
作者:
Yu M;Yang W;Ni T;Tang Z;Nakadai T;Zhu J;Roeder RG
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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