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Yin and yang of mediator function revealed by human mutants

机译:人类突变体揭示了介体功能的阴阳

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摘要

Mediator is an ~30-subun.it multiprotein complex approximately twice the size of the 12-subunit RNA poly-merase (i.e., RNA polymerase Ⅱ [Pol Ⅱ]) that transcribes most human genes. Mediator functions as a molecular bridge between Pol Ⅱ bound at transcription start sites (TSSs) and activation and repression domains of regulatory sequence-specific DNA binding transcription factors (TFs) bound to enhancers and promoter proximal transcription control sequences (1-5) (Fig. 1). In PNAS, Zhou et al. (6) report a significant advance in understanding how mutations in one Mediator subunit, MED12, result in two types of X-linked intellectual disability known as FG and Lujan syndromes. Studies of the mutant Mediators reveal how MED 12 interactions with different components of the tran-scriptional machine produce opposing activating and inhibitory influences necessary for the proper level of transcription required for normal development.
机译:介体是约30个亚单位的多蛋白复合物,大约是转录大多数人类基因的12个亚基RNA聚合酶(即RNA聚合酶Ⅱ[PolⅡ])大小的两倍。介体充当在转录起始位点(TSSs)结合的PolⅡ与与增强子和启动子近端转录控制序列结合的调节序列特异性DNA结合转录因子(TFs)的激活和抑制域之间的分子桥梁(1-5)(图1)。在PNAS中,Zhou等人。 (6)报告了在理解一个介体亚基MED12中的突变如何导致两种与X连锁的智力障碍(称为FG和Lujan综合征)的认识方面的重大进展。突变介体的研究揭示了MED 12与转录机器不同组件的相互作用如何产生正常发育所需的适当转录水平所必需的相反的激活和抑制作用。

著录项

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  • 作者

    Arnold J. Berk;

  • 作者单位

    Department of Microbiology, Immunology and Molecular Genetics, Molecular Biology Institute, University of California, Los Angeles, CA 90095;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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