The metazoan Mediator co-activator complex as an integrative hub for transcriptional regulation.

The metazoan Mediator co-activator complex as an integrative hub for transcriptional regulation.
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DOI:
10.1038/nrg2901
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发表时间:
2010-11
期刊:
Nature reviews. Genetics
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其他
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介体是一种进化上保守的多蛋白复合体,是蛋白质编码基因的关键调节因子。在后生动物细胞中,负责动态平衡、细胞生长和分化的多条途径通过转录激活因子和抑制因子汇聚到介体上,转录激活因子和抑制因子针对该复合体近30个亚基中的一个或多个。除了直接与RNA聚合酶II相互作用外,Mediator还具有多种功能,可以与许多其他辅助激活因子和辅助抑制因子相互作用,并协调它们的作用,包括那些作用于染色质水平的辅助激活因子和辅助抑制因子。这些相互作用最终允许介体传递的输出范围从基因的最大激活到基础转录的调节再到长期的表观遗传沉默。
The Mediator is an evolutionarily conserved, multiprotein complex that is a key regulator of protein-coding genes. In metazoan cells, multiple pathways that are responsible for homeostasis, cell growth and differentiation converge on the Mediator through transcriptional activators and repressors that target one or more of the almost 30 subunits of this complex. Besides interacting directly with RNA polymerase II, Mediator has multiple functions and can interact with and coordinate the action of numerous other co-activators and co-repressors, including those acting at the level of chromatin. These interactions ultimately allow the Mediator to deliver outputs that range from maximal activation of genes to modulation of basal transcription to long-term epigenetic silencing.
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