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Life on Mars, cellularly speaking

机译:从细胞角度讲火星上的生活

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摘要

Your cells are constantly talking to one another. This dialogue relies predominantly on the emission of signals by one cell and their detection by receptors at the outer (plasma) membrane of another; the receptors then send a message inwards towards the nucleus. Inside the cell, proteins of the Ras family are key binary switches that are turned from 'off' to 'on' by these receptor-transduced incoming stimuli, and propagate signals further downstream. A long-held tenet is that Ras proteins work only at the plasma membrane. But we are now invited to think differently: on page 694 of this issue, Bivona and co-workers confirm that one Ras protein, Ha-Ras, is also activated on the Golgi apparatus inside the cell, and they show that it is not only biologically active there, but is the sole effective form of Ras in certain settings. The Golgi is involved in protein secretion, and thereby controls how signals get out of the cell. The discovery that ―through Ras―it also regulates how they get in is, from a signalling viewpoint, as unexpected as life on Mars.
机译:您的细胞不断地互相交谈。这种对话主要取决于一个细胞发出的信号,以及另一个细胞的外(质膜)受体的检测能力。然后,受体向内向核发送信息。在细胞内部,Ras家族的蛋白质是关键的二进制开关,这些开关通过这些受体转导的传入刺激从“关闭”变为“开启”,并向下游传播信号。长期存在的原则是Ras蛋白仅在质膜上起作用。但是,现在我们被邀请换个角度思考:在此问题的第694页上,Bivona及其同事证实了一种Ras蛋白Ha-Ras在细胞内部的高尔基体上也被激活了,他们证明不仅在那里具有生物活性,但是在某些情况下是Ras的唯一有效形式。高尔基体参与蛋白质分泌,从而控制信号如何从细胞中排出。从信号的角度来看,“通过拉斯”也调节它们的进入方式的发现,就像火星上的生命一样出乎意料。

著录项

  • 来源
    《Nature》 |2003年第6949期|p.624-625|共2页
  • 作者

    Pier Paolo Di Fiore;

  • 作者单位

    Istituto FIRC di Oncologia Molecolare, Milan 20139, the Medical School, University of Milan, and the Istituto Europeo di Oncologia, Milan, Italy;

  • 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 自然科学总论;
  • 关键词

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