Signaling to p53: ribosomal proteins find their way.

Signaling to p53: ribosomal proteins find their way.
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DOI:
10.1016/j.ccr.2009.09.024
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发表时间:
2009-11-06
期刊:
影响因子:
50.3
通讯作者:
Lu H
Lu H
中科院分区:
医学1区
文献类型:
--
作者:
Zhang Y;Lu H

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本质上不同的细胞生长和分裂通过细胞内和细胞外信号传导的微妙网络紧密耦合,需要核糖体生物发生。许多赋予核糖体生物发生不稳定性的事件可能导致核仁应激。为了应对这种应激,一些核糖体蛋白与 MDM2 结合并阻断 MDM2 介导的 p53 泛素化和降解,导致 p53 依赖性细胞周期停滞。通过这样做,核糖体蛋白在细胞生长失调与细胞分裂抑制之间发挥着至关重要的作用。核糖体蛋白-MDM2-p53信号通路提供了一个分子开关,可能构成一个监测核糖体生物合成完整性的监视网络。
Inherently disparate cell growth and division, which are intimately coupled through a delicate network of intracellular and extracellular signaling, require ribosomal biogenesis. A number of events imparting instability to ribosomal biogenesis can cause nucleolar stress. In response to this stress, several ribosomal proteins bind to MDM2 and block MDM2-mediated p53 ubiquitination and degradation, resulting in p53-dependent cell cycle arrest. By doing so, the ribosomal proteins play a crucial role in connecting deregulated cell growth with inhibition of cell division. The ribosomal protein-MDM2-p53 signaling pathway provides a molecular switch that may constitute a surveillance network monitoring the integrity of ribosomal biogenesis.
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