Yeast TOR signaling: a mechanism for metabolic regulation.

Yeast TOR signaling: a mechanism for metabolic regulation.
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酵母 TOR 信号传导:代谢调节机制。

DOI:
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发表时间:
2004
影响因子:
--
通讯作者:
K. Wedaman
K. Wedaman
中科院分区:
医学3区
文献类型:
--
作者:
T. Powers;I. Dilova;C. Chen;K. Wedaman

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了解细胞生长是如何对环境信号做出反应的仍然是一个具有挑战性的生物学问题。最近的研究表明,TOR(靶标雷帕霉素)激酶在真核细胞所使用的细胞内调节网络中发挥作用,根据营养物质的可获得性来调节它们的生长。这个网络影响基因表达的方方面面,包括转录、翻译和蛋白质稳定性,使TOR成为细胞活动的全球调节因子。在这里,我们综述了我们最近在芽殖酵母中由TOR控制的两个特定转录输出的研究:(1)对核糖体生物发生相关基因的正调控,(2)对谷氨酸和谷氨酰胺从头合成所需基因的负调控。这些研究提出了一个重要的问题,即不同的营养信号如何通过共同的信号通路,最终产生不同的转录反应。
Understanding how cell growth is regulated in response to environmental signals remains a challenging biological problem. Recent studies indicate the TOR (target of rapamycin) kinase acts within an intracellular regulatory network used by eukaryotic cells to regulate their growth according to nutrient availability. This network affects all aspects of gene expression, including transcription, translation, and protein stability, making TOR an excellent candidate as a global regulator of cellular activity. Here we review our recent studies of two specific transcriptional outputs controlled by TOR in the budding yeast, S. cerevisiae: (1) positive regulation of genes involved in ribosome biogenesis, and (2) negative regulation of genes required for de novo biosynthesis of glutamate and glutamine. These studies have raised the important issue as to how diverse nutritional cues can pass through a common signaling pathway and yet ultimately generate distinct transcriptional responses.
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发表时间: 2000-06
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