scholarly journals Phenotypic Variability of Bacterial Cell Cycle: Mathematical Model

Author(s):  
В.А. Лихошвай ◽  
V.A. Likhoshvai

The results of the study of mechanisms of different cell phenotypes occurrence in a genetically homogenous population using the bacterial cell cycle model are presented. It was shown that phenotypic variability represents an internal, immanent property of bacteria. The basis of this phenomenon is universal non-linear properties of the conjugated transcription-translation system, that controls all cellular processes. Phenotypic variability occurs in a simple, deterministic, self-reproducing system under the uniform transmission of the structural components to the daughter cells during division and in the absence of any special control mechanisms of molecular-genetic processes and enzymatic reactions.

2021 ◽  
Vol 12 ◽  
Author(s):  
Anne Galinier ◽  
Elodie Foulquier ◽  
Frédérique Pompeo

To survive and adapt to changing nutritional conditions, bacteria must rapidly modulate cell cycle processes, such as doubling time or cell size. Recent data have revealed that cellular metabolism is a central regulator of bacterial cell cycle. Indeed, proteins that can sense precursors or metabolites or enzymes, in addition to their enzymatic activities involved in metabolism, were shown to directly control cell cycle processes in response to changes in nutrient levels. Here we focus on cell elongation and cell division in the Gram-positive rod-shaped bacterium Bacillus subtilis and we report evidences linking these two cellular processes to environmental nutritional availability and thus metabolic cellular status.


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