Stochastic pumping of ions based on colored noise in bacterial channels under acidic stress
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comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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Title
Stochastic pumping of ions based on colored noise in bacterial channels under acidic stressDate
2016-06Publisher
Royal Society of ChemistryBibliographic citation
LÓPEZ, M. Lidón; QUERALT-MARTÍN, María; ALCARAZ, Antonio. Stochastic pumping of ions based on colored noise in bacterial channels under acidic stress. Nanoscale, 2016, vol. 8, no 27, p. 13422-13428.Type
info:eu-repo/semantics/articlePublisher version
http://pubs.rsc.org/-/content/articlehtml/2016/nr/c6nr02638aVersion
info:eu-repo/semantics/acceptedVersionSubject
Abstract
Fluctuation-driven ion transport can be obtained in bacterial channels with the aid of different types of colored noise including the biologically relevant Lorentzian one. Using the electrochemical rectification of ... [+]
Fluctuation-driven ion transport can be obtained in bacterial channels with the aid of different types of colored noise including the biologically relevant Lorentzian one. Using the electrochemical rectification of the channel current as a ratchet mechanism we observe transport of ions up to their concentration gradient under conditions similar to that met in vivo, namely moderate pH gradients and asymmetrically charged lipid membranes. We find that depending on the direction of the concentration gradient the channel can pump either cations or anions from the diluted side to the concentrated one. We discuss the possible relevance of this phenomenon for the pH homeostasis of bacterial cells [-]
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Nanoscale Volume 8, Issue 27, July 2016Rights
© The Royal Society of Chemistry 2016
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