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Title:On the origin and characteristics of noise-induced Lévy Walks of E. Coli
Authors:Matthäus, Franziska (Author)
Mommer, Mario (Author)
Curk, Tine (Author)
Dobnikar, Jure (Author)
Files:.pdf PLoS_ONE_2011_Matthäus_et_al._On_the_Origin_and_Characteristics_of_Noise-Induced_Levy_Walks_of_E._Coli.PDF (288,52 KB)
MD5: D4C4E2A386EBD06FCDF85B7E5236474F
 
URL http://dx.plos.org/10.1371/journal.pone.0018623
 
Language:English
Work type:Scientific work (r2)
Typology:1.01 - Original Scientific Article
Organization:FNM - Faculty of Natural Sciences and Mathematics
Abstract:Lévy walks as a random search strategy have recently attracted a lot of attention, and have been described in many animal species. However, very little is known about one of the most important issues, namely how Lévy walks are generated by biological organisms. We study a model of the chemotaxis signaling pathway of E. coli, and demonstrate that stochastic fluctuations and the specific design of the signaling pathway in concert enable the generation of Lévy walks. We show that Lévy walks result from the superposition of an ensemble of exponential distributions, which occurs due to the shifts in the internal enzyme concentrations following the stochastic fluctuations. With our approach we derive the power-law analytically from a model of the chemotaxis signaling pathway, and obtain a power-law exponent , which coincides with experimental results. This work provides a means to confirm Lévy walks as natural phenomenon by providing understanding on the process through which they emerge. Furthermore, our results give novel insights into the design aspects of biological systems that are capable of translating additive noise on the microscopic scale into beneficial macroscopic behavior.
Keywords:Lévy walks, E. coli
Year of publishing:2011
Number of pages:str. 1-8
Numbering:št. 4, Letn. 6
ISSN:1932-6203
UDC:577
ISSN on article:1932-6203
COBISS_ID:25045031 New window
DOI:10.1371/journal.pone.0018623 New window
NUK URN:URN:SI:UM:DK:NRSQKOIW
Views:584
Downloads:268
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Categories:Misc.
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Record is a part of a journal

Title:PloS one
Publisher:Public Library of Science
ISSN:1932-6203
COBISS.SI-ID:2005896 New window

Document is financed by a project

Funder:EC - European Commission
Funding Programme:FP7
Project no.:234810
Name:Physics of Complex Colloids: Equilibrium and Driven
Acronym:COMPLOIDS

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:19.06.2017

Secondary language

Language:Slovenian
Keywords:Lévyjevi pobegi, E. coli


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