...
首页> 外文期刊>Molecular and Cellular Biology >Regulation of rRNA Synthesis by TATA-Binding Protein-Associated Factor Mot1
【24h】

Regulation of rRNA Synthesis by TATA-Binding Protein-Associated Factor Mot1

机译:TATA结合蛋白相关因子Mot1对rRNA合成的调控。

获取原文
           

摘要

Mot1 is an essential, conserved, TATA-binding protein (TBP)-associated factor in Saccharomyces cerevisiae with well-established roles in the global control of RNA polymerase II (Pol II) transcription. Previous results have suggested that Mot1 functions exclusively in Pol II transcription, but here we report a novel role for Mot1 in regulating transcription by RNA polymerase I (Pol I). In vivo, Mot1 is associated with the ribosomal DNA, and loss of Mot1 results in decreased rRNA synthesis. Consistent with a direct role for Mot1 in Pol I transcription, Mot1 also associates with the Pol I promoter in vitro in a reaction that depends on components of the Pol I general transcription machinery. Remarkably, in addition to Mot1's role in initiation, rRNA processing is delayed in mot1 cells. Taken together, these results support a model in which Mot1 affects the rate and efficiency of rRNA synthesis by both direct and indirect mechanisms, with resulting effects on transcription activation and the coupling of rRNA synthesis to processing.
机译:Mot1是啤酒酵母中一种必需的,保守的,TATA结合蛋白(TBP)相关因子,在全球控制RNA聚合酶II(Pol II)转录中具有公认的作用。先前的结果表明Mot1仅在Pol II转录中起作用,但是在这里我们报道了Mot1在通过RNA聚合酶I(Pol I)调控转录中的新作用。在体内,Mot1与核糖体DNA相关,而Mot1的缺失导致rRNA合成减少。与Mot1在Pol I转录中的直接作用一致,Mot1在体外还与Pol I启动子相关联,该反应取决于Pol I通用转录机制的组成部分。值得注意的是,除了Mot1在启动过程中的作用外, mot1 细胞中的rRNA加工也被延迟。两者合计,这些结果支持一个模型,其中Mot1通过直接和间接机制影响rRNA合成的速率和效率,从而对转录激活以及rRNA合成与加工的耦合产生影响。

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