Cell size control in bacteria.

Cell size control in bacteria.
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DOI:
10.1016/j.cub.2012.02.032
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发表时间:
2012-05-08
期刊:
影响因子:
9.2
通讯作者:
Levin, Petra Anne
Levin, Petra Anne
中科院分区:
生物学1区
文献类型:
--
作者:
Chien, An-Chun;Hill, Norbert S.;Levin, Petra Anne

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与真核生物一样,细菌必须协调分裂与生长,以确保细胞的大小适合给定的环境条件或发育命运。作为单细胞生物,营养物质的可用性是对细菌细胞大小影响最大的因素之一。四十多年前进行的经典生理实验首次证明,细胞大小与革兰氏阴性细菌鼠伤寒沙门氏菌的营养来源和生长速率直接相关。这一观察结果随后成为揭示细胞大小在密切相关的有机体大肠杆菌细胞周期进程中的作用的研究的基础。最近,强大的遗传、分子和成像工具的发展使我们能够识别和表征革兰氏阳性模型生物枯草芽孢杆菌中负责协调细胞分裂和细胞大小与生长速率的营养依赖性途径。在这里,我们讨论了细胞大小在细菌生长和发育中的作用,并提出了一个广泛适用的模型来控制这个重要且高度分化的生命领域的细胞大小。
Like eukaryotes, bacteria must coordinate division with growth to ensure cells are the appropriate size for a given environmental condition or developmental fate. As single-celled organisms, nutrient availability is one of the strongest influences on bacterial cell size. Classic physiological experiments conducted over four decades ago first demonstrated that cell size is directly correlated with nutrient source and growth rate in the Gram-negative bacterium Salmonella typhimurium. This observation subsequently served as the basis for studies revealing a role for cell size in cell cycle progression in a closely related organism, Escherichia coli. More recently, the development of powerful genetic, molecular, and imaging tools has allowed us to identify and characterize the nutrient-dependent pathway responsible for coordinating cell division and cell size with growth rate in the Gram-positive model organism B. subtilis. Here, we discuss the role of cell size in bacterial growth and development and propose a broadly applicable model for cell size control in this important and highly divergent domain of life.
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