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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Dynamic features of gene expression control by small regulatory RNAs
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Dynamic features of gene expression control by small regulatory RNAs

机译:小型调节性RNA控制基因表达的动态特征

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摘要

Small regulatory RNAs (sRNAs) in eukaryotes and bacteria play an important role in the regulation of gene expression either by binding to regulatory proteins or directly to target mRNAs. Two of the best-characterized bacterial sRNAs, Spot42 and RyhB, form a complementary pair with the ribosome binding region of their target mRNAs, thereby inhibiting translation or promoting mRNA degradation. To investigate the steady-state and dynamic potential of such sRNAs, we examine the 2 key parameters characterizing sRNA regulation: the capacity to overexpress the sRNA relative to its target mRNA and the speed at which the target mRNA is irreversibly inactivated. We demonstrate different methods to determine these 2 key parameters, for Spot42 and RyhB, which combine biochemical and genetic experiments with computational analysis. We have developed a mathematical model that describes the functional properties of sRNAs with various characteristic parameters. We observed that Spot42 and RyhB function in distinctive parameter regimes, which result in divergent mechanisms.
机译:真核生物和细菌中的小调节RNA(sRNA)通过与调节蛋白结合或直接与靶mRNA结合,在基因表达的调节中发挥重要作用。最具特征的两个细菌sRNA,Spot42和RyhB,与它们靶标mRNA的核糖体结合区形成互补对,从而抑制翻译或促进mRNA降解。为了研究此类sRNA的稳态和动态潜力,我们研究了表征sRNA调控的2个关键参数:相对于其靶mRNA而言过表达sRNA的能力以及靶mRNA不可逆地失活的速度。我们演示了确定Spot2和RyhB这2个关键参数的不同方法,这些方法将生化和遗传实验与计算分析相结合。我们已经开发了一种数学模型,用于描述具有各种特征参数的sRNA的功能特性。我们观察到Spot42和RyhB在不同的参数范围内起作用,这导致了不同的机制。

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  • 作者单位

    Department of Physics, Kyushu University 33, Fukuoka 812-8581, Japan Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen, Denmark;

    Departement de Biochimie, RNA Group, Universite de Sherbrooke, Sherbrooke, QC, Canada J1H 5N4;

    Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen, Denmark;

    Department of Genetics, Eoetvoes Lorand University, H-1117, Budapest, Hungary;

    Laboratory of Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892-4264;

    Departement de Biochimie, RNA Group, Universite de Sherbrooke, Sherbrooke, QC, Canada J1H 5N4;

    Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen, Denmark;

  • 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
  • 中图分类
  • 关键词

    gene regulation; mRNA silencing; RyhB; small RNA; Spot42;

    机译:基因调控;mRNA沉默;RyhB;小RNA;现货42;

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