PMID: 22587129May 17, 2012Paper

Effective tension and fluctuations in active membranes

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Bastien LoubetMichael Andersen Lomholt

Abstract

We calculate the fluctuation spectrum of the shape of a lipid vesicle or cell exposed to a nonthermal source of noise. In particular, we take constraints on the membrane area and the volume of fluid that it encapsulates into account when obtaining expressions for the dependency of the membrane tension on the noise. We then investigate three possible origins of the nonthermal noise taken from the literature: A direct force, which models an external medium pushing on the membrane, a curvature force, which models a fluctuating spontaneous curvature, and a permeation force coming from an active transport of fluid through the membrane. For the direct force and curvature force cases, we compare our results to existing experiments on active membranes.

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Citations

Nov 5, 2013·The Journal of Chemical Physics·Bastien LoubetHimanshu Khandelia
Nov 25, 2014·Biophysical Journal·Julia Peukes, Timo Betz
Feb 18, 2014·Advances in Colloid and Interface Science·Zheng Shi, Tobias Baumgart
Mar 1, 2017·Proceedings of the National Academy of Sciences of the United States of America·Arthur A EvansAlex J Levine
Mar 4, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·M Guedda
Feb 17, 2019·The Journal of Chemical Physics·S Mahdiyeh MousaviRoland G Winkler
Oct 9, 2015·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Shigeyuki KomuraRyuichi Okamoto
May 2, 2020·Physical Review Letters·Sho C Takatori, Amaresh Sahu
Aug 6, 2020·The Journal of Chemical Physics·Roland G Winkler, Gerhard Gompper
Jul 28, 2019·Biophysical Journal·Josip A JanešAna-Sunčana Smith
Oct 5, 2021·Soft Matter·Subhadip GhoshDebasish Chaudhuri

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