Signal integration by mTORC1 coordinates nutrient input with biosynthetic output.

Signal integration by mTORC1 coordinates nutrient input with biosynthetic output.
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MTORC1的信号整合与生物合成输出相协调的营养输入。

DOI:
10.1038/ncb2763
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发表时间:
2013-06
影响因子:
21.3
通讯作者:
--
中科院分区:
生物学1区
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--
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通过代谢途径的通量本质上对特定底物和产物的水平敏感,但细胞代谢也由感测细胞或生物体的营养和能量状态的综合控制机制管理。雷帕霉素(mTOR)复合物1(mTORC 1)是真核细胞中普遍存在的一种蛋白激酶复合物,其机制靶标已成为将营养感测与细胞代谢的协调调节联系起来的关键信号节点。在这里,mTORC1作为细胞生长条件和促进细胞生长的合成代谢过程之间的管道的作用进行了讨论。mTORC 1整合系统信号的信号通路的新兴网络,在分泌的生长因子的形式,与本地信号,在细胞营养物质(氨基酸,葡萄糖和氧)和能量(ATP)的形式进行了详细说明。我们对mTORC1上游精致调控网络的不断扩展的理解,为集成传感机制提供了分子见解,通过该机制,多种细胞信号会聚在一起以控制细胞生理学。
Flux through metabolic pathways is inherently sensitive to the levels of specific substrates and products, but cellular metabolismis also managed by integrated control mechanisms that sense the nutrient and energy status of a cell or organism. The mechanistic target of rapamycin (mTOR) complex 1 (mTORC1), a protein kinase complex ubiquitous to eukaryotic cells, has emerged as a critical signaling node that links nutrient sensing to the coordinated regulation of cellular metabolism. Here, the role of mTORC1 as a conduit between cellular growth conditions and the anabolic processes that promote cell growth is discussed. The emerging network of signaling pathways by which mTORC1 integrates systemic signals, in the form of secreted growth factors, with local signals, in the form of cellular nutrients (amino acids, glucose, and oxygen) and energy (ATP) is detailed. Our expanding understanding of the exquisite regulatory network upstream of mTORC1 provides molecular insights into the integrated sensing mechanisms by which diverse cellular signals converge to control cell physiology.
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