...
首页> 外文期刊>Molecular and Cellular Biology >Sub1 Globally Regulates RNA Polymerase II C-Terminal Domain Phosphorylation
【24h】

Sub1 Globally Regulates RNA Polymerase II C-Terminal Domain Phosphorylation

机译:Sub1全局调节RNA聚合酶II C末端域磷酸化。

获取原文
           

摘要

The transcriptional coactivator Sub1 has been implicated in several aspects of mRNA metabolism in yeast, such as activation of transcription, termination, and 3′-end formation. Here, we present evidence that Sub1 plays a significant role in controlling phosphorylation of the RNA polymerase II large subunit C-terminal domain (CTD). We show that SUB1 genetically interacts with the genes encoding all four known CTD kinases, SRB10, KIN28, BUR1, and CTK1, suggesting that Sub1 acts to influence CTD phosphorylation at more than one step of the transcription cycle. To address this directly, we first used in vitro kinase assays, and we show that, on the one hand, SUB1 deletion increased CTD phosphorylation by Kin28, Bur1, and Ctk1 but, on the other, it decreased CTD phosphorylation by Srb10. Second, chromatin immunoprecipitation assays revealed that SUB1 deletion decreased Srb10 chromatin association on the inducible GAL1 gene but increased Kin28 and Ctk1 chromatin association on actively transcribed genes. Taken together, our data point to multiple roles for Sub1 in the regulation of CTD phosphorylation throughout the transcription cycle.
机译:转录共激活因子Sub1与酵母中mRNA代谢的几个方面有关,例如转录的激活,终止和3'端的形成。在这里,我们提供的证据表明Sub1在控制RNA聚合酶II大亚基C末端域(CTD)的磷酸化中起重要作用。我们显示, SUB1 与编码所有四个已知CTD激酶, SRB10 KIN28 BUR1 ,和 CTK1 ,表明Sub1在转录周期的多个步骤中影响CTD磷酸化。为了直接解决这个问题,我们首先使用了体外激酶测定,结果表明,一方面, SUB1 缺失增加了Kin28,Bur1和Ctk1的CTD磷酸化,但,另一方面,它减少了Srb10的CTD磷酸化。其次,染色质免疫沉淀实验表明, SUB1 缺失降低了诱导型 GAL1 基因上Srb10染色质的缔合,但增加了主动转录基因上Kin28和Ctk1染色质的缔合。综上所述,我们的数据表明Sub1在整个转录周期中调控CTD磷酸化的多种作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号