Multi‐bit Boolean model for chemotactic drift ofEscherichia coli
نویسندگان
چکیده
منابع مشابه
Signaling noise enhances chemotactic drift of E. coli.
Noise in the transduction of chemotactic stimuli to the flagellar motor of E. coli will affect the random run-and-tumble motion of the cell and the ability to perform chemotaxis. Here we use numerical simulations to show that an intermediate level of noise in the slow methylation dynamics enhances drift while not compromising localization near concentration peaks. A minimal model shows how such...
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The bacterium Escherichia coli (E. coli) moves in its natural environment in a series of straight runs, interrupted by tumbles which cause change of direction. It performs chemotaxis towards chemo-attractants by extending the duration of runs in the direction of the source. When there is a spatial gradient in the attractant concentration, this bias produces a drift velocity directed towards its...
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The bacterium E. coli maneuvers itself to regions with high chemoattractant concentrations by performing two stereotypical moves: ‘runs’, in which it moves in near straight lines, and ‘tumbles’, in which it does not advance but changes direction randomly. The duration of each move is stochastic and depends upon the chemoattractant concentration experienced in the recent past. We relate this sto...
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Extending the classic works of Berg and Purcell on the biophysics of bacterial chemotaxis, we find the optimal chemotactic strategy for the peritrichous bacterium E. coli in the high and low signal to noise ratio limits. The optimal strategy depends on properties of the environment and properties of the individual bacterium, and is therefore highly adaptive. We review experiments relevant to te...
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ژورنال
عنوان ژورنال: IET Systems Biology
سال: 2020
ISSN: 1751-8849,1751-8857
DOI: 10.1049/iet-syb.2020.0060