Behavioral Variability and Phenotypic Diversity in Bacterial Chemotaxis.

Behavioral Variability and Phenotypic Diversity in Bacterial Chemotaxis.
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DOI:
10.1146/annurev-biophys-062215-010954
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发表时间:
2018-05-20
影响因子:
12.4
通讯作者:
Emonet T
Emonet T
中科院分区:
生物学1区
文献类型:
--
作者:
Waite AJ;Frankel NW;Emonet T

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Living cells detect and process external signals using signaling pathways that are affected by random fluctuations. These variations cause the behavior of individual cells to fluctuate over time (behavioral variability) and generate phenotypic differences between genetically identical individuals (phenotypic diversity). These two noise sources reduce our ability to predict biological behavior because they diversify cellular responses to identical signals. Here, we review recent experimental and theoretical advances in understanding the mechanistic origin and functional consequences of such variation in Escherichia coli chemotaxis—a well-understood model of signal transduction and behavior. After briefly summarizing the architecture and logic of the chemo-taxis system, we discuss determinants of behavior and chemotactic performance of individual cells. Then, we review how cell-to-cell differences in protein abundance map onto differences in individual chemotactic abilities and how phenotypic variability affects the performance of the population. We conclude with open questions to be addressed by future research.
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