Function and regulation of the Mediator complex.

Function and regulation of the Mediator complex.
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DOI:
10.1016/j.gde.2011.01.013
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发表时间:
2011-04
影响因子:
4
通讯作者:
Conaway, Joan Weliky
Conaway, Joan Weliky
中科院分区:
生物学2区
文献类型:
--
作者:
Conaway, Ronald C.;Conaway, Joan Weliky

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在过去的几年中,在生物化学和遗传学研究的中介体复合物的结构和功能的进展,揭示了新的光在其亚基结构和它的作用机制的转录RNA聚合酶II(pol II)。重组介体pol的重建方法的改进使得能够更深入地分析介体与pol II和一般起始因子相互作用并控制pol II和一般起始因子活性的机制的基本特征。发现和表征多种功能不同形式的介体,其特征在于Cdk8激酶模块的存在或不存在,这导致了对介体如何在Pol II转录激活和抑制中起作用的新见解。最后,DNA结合转录因子的转录激活结构域(AD)靶向Mediator的机制的研究进展揭示了Mediator参与信号转导的方式的意想不到的复杂性。
Over the past few years, advances in biochemical and genetic studies of the structure and function of the Mediator complex have shed new light on its subunit architecture and its mechanism of action in transcription by RNA polymerase II (pol II). The development of improved methods for reconstitution of recombinant Mediator subassemblies is enabling more in-depth analyses of basic features of the mechanisms by which Mediator interacts with and controls the activity of pol II and the general initiation factors. The discovery and characterization of multiple, functionally distinct forms of Mediator characterized by the presence or absence of the Cdk8 kinase module have led to new insights into how Mediator functions in both Pol II transcription activation and repression. Finally, progress in studies of the mechanisms by which the transcriptional activation domains (ADs) of DNA binding transcription factors target Mediator have brought to light unexpected complexities in the way Mediator participates in signal transduction.
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