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Endonucleolytic cleavage of eukaryotic mRNAs with stalls in translation elongation.

机译:真核mRNA的内切核酸酶裂解与翻译延伸停滞。

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摘要

A fundamental aspect of the biogenesis and function of eukaryotic messenger RNA is the quality control systems that recognize and degrade non-functional mRNAs. Eukaryotic mRNAs where translation termination occurs too soon (nonsense-mediated decay) or fails to occur (non-stop decay) are rapidly degraded. We show that yeast mRNAs with stalls in translation elongation are recognized and targeted for endonucleolytic cleavage, referred to as 'no-go decay'. The cleavage triggered by no-go decay is dependent on translation and involves Dom34p and Hbs1p. Dom34p and Hbs1p are similar to the translation termination factors eRF1 and eRF3 (refs 3, 4), indicating that these proteins might function in recognizing the stalled ribosome and triggering endonucleolytic cleavage. No-go decay provides a mechanism for clearing the cell of stalled translation elongation complexes, which could occur as a result of damaged mRNAs or ribosomes, or as a mechanism of post-transcriptional control.
机译:真核信使RNA的生物发生和功能的基本方面是识别和降解非功能性mRNA的质量控制系统。快速终止翻译终止太快(无义介导的衰变)或未能发生(不间断的衰变)的真核mRNA。我们显示酵母mRNAs具有翻译延伸停滞的识别和靶向内切核酸酶切,称为“无衰减”。由不进行衰减触发的切割取决于翻译,并涉及Dom34p和Hbs1p。 Dom34p和Hbs1p与翻译终止因子eRF1和eRF3相似(参考文献3、4),表明这些蛋白质可能在识别停滞的核糖体和触发核酸内切裂解中起作用。免去衰变提供了清除细胞停滞的翻译延伸复合物的机制,其可能是由于受损的mRNA或核糖体或转录后控制的机制而发生的。

著录项

  • 来源
    《Nature》 |2006年第7083期|P.561-564|共4页
  • 作者

    Doma MK; Parker R;

  • 作者单位

    Howard Hughes Medical Institute, Department of Molecular and Cellular Biology, University of Arizona, Tucson, Arizona 85721, USA.;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);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 基础医学;
  • 关键词

    Cytokinesis; physiological aspects; termination factor; control;

    机译:细胞分裂;生理学;终止因子;控制;

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