Noise in cellular signaling pathways: causes and effects.

Noise in cellular signaling pathways: causes and effects.
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DOI:
10.1016/j.tibs.2012.01.001
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发表时间:
2012-05
影响因子:
13.8
通讯作者:
Arold, Stefan T.
Arold, Stefan T.
中科院分区:
生物学1区
文献类型:
--
作者:
Ladbury, John E.;Arold, Stefan T.

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由遗传回路(转录和翻译)随机波动引起的噪音现在被认为是细胞功能和表型行为的核心方面。在信号网络中也检测到了噪声,但这种噪声的起源以及它如何影响细胞结果仍然知之甚少。在这里,我们认为信号网络中的噪声是由蛋白质-蛋白质相互作用的内在混杂性造成的,并且这种噪声塑造了细胞信号转导。这种分子信号噪声的存在所促进的特征包括信号成分的多聚化和聚类、蛋白质浓度总体变化的多效性以及信号传播的概率而非线性视图。
Noise caused by stochastic fluctuations in genetic circuits (transcription and translation) is now appreciated as a central aspect of cell function and phenotypic behavior. Noise has also been detected in signaling networks, but the origin of this noise and how it shapes cellular outcomes remain poorly understood. Here, we argue that noise in signaling networks results from the intrinsic promiscuity of protein-protein interactions, and that this noise has shaped cellular signal transduction. Features promoted by the presence of this molecular signaling noise include multimerization and clustering of signaling components, pleiotropic effects of gross changes in protein concentration, and a probabilistic rather than linear view of signal propagation.
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