Adaptive noise.

Adaptive noise.
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DOI:
10.1098/rspb.2013.1104
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发表时间:
2013-09-22
期刊:
Proceedings. Biological sciences
影响因子:
--
通讯作者:
Reece SE
Reece SE
中科院分区:
其他
文献类型:
--
作者:
Viney M;Reece SE

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在生物学中,噪音意味着错误和混乱,因此是生物体可能寻求最小化和减轻的东西。我们认为这种噪音是可以适应的。最近的研究表明,基因表达可以是嘈杂的,噪音可以被遗传控制,基因和基因网络的嘈杂程度各不相同,噪音会在基因相同的细胞中产生表型差异。这样的表型差异可能有益于健康,这表明进化可以塑造噪音,而噪音可能具有适应性。例如,基因网络可以产生双稳态,从而导致表型多样性和基因型单个细胞之间的切换,这可能是一种下注对冲策略。在这里,我们回顾了基因表达中的噪声来源,噪声在生物系统中的适应性程度,并建议将进化严谨应用于噪声研究对于充分理解生物体表型是必要的。
In biology, noise implies error and disorder and is therefore something which organisms may seek to minimize and mitigate against. We argue that such noise can be adaptive. Recent studies have shown that gene expression can be noisy, noise can be genetically controlled, genes and gene networks vary in how noisy they are and noise generates phenotypic differences among genetically identical cells. Such phenotypic differences can have fitness benefits, suggesting that evolution can shape noise and that noise may be adaptive. For example, gene networks can generate bistable states resulting in phenotypic diversity and switching among individual cells of a genotype, which may be a bet hedging strategy. Here, we review the sources of noise in gene expression, the extent to which noise in biological systems may be adaptive and suggest that applying evolutionary rigour to the study of noise is necessary to fully understand organismal phenotypes.
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