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Molecular motor efficiency is maximized in the presence of both power-stroke and rectification through feedback

Schmitt, Regina LU ; Parrondo, J. M. R.; Linke, Heiner LU and Johansson, Jonas LU (2015) In New Journal of Physics 17.
Abstract
We present a model for a feedback-controlled ratchet consisting of a Brownian particle and a moving, finite barrier that is shifted by an external agent depending on the position of the particle. By modifying the value of a single parameter of the feedback protocol, the model can act either as a pure rectifier, a power-stroke (PS) motor, or a combination of both. Interestingly, in certain situations the motor reaches a maximum efficiency for an intermediate value of that parameter, i.e., for a combination of the information ratchet and the PS mechanisms. We relate our results to the biological motors kinesin, myosin II, and myosin V, finding that these motors operate in a regime of length scales and forces where the efficiency is maximized... (More)
We present a model for a feedback-controlled ratchet consisting of a Brownian particle and a moving, finite barrier that is shifted by an external agent depending on the position of the particle. By modifying the value of a single parameter of the feedback protocol, the model can act either as a pure rectifier, a power-stroke (PS) motor, or a combination of both. Interestingly, in certain situations the motor reaches a maximum efficiency for an intermediate value of that parameter, i.e., for a combination of the information ratchet and the PS mechanisms. We relate our results to the biological motors kinesin, myosin II, and myosin V, finding that these motors operate in a regime of length scales and forces where the efficiency is maximized for a combination of rectification and PS mechanisms. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
molecular motor, Brownian ratchet, power-stroke, rectification of, fluctuations, efficiency, Shannon entropy, Brownian recitifier
in
New Journal of Physics
volume
17
publisher
IOP Publishing Ltd.
external identifiers
  • wos:000358927800002
  • scopus:84953897540
ISSN
1367-2630
DOI
10.1088/1367-2630/17/6/065011
language
English
LU publication?
yes
id
129b520e-715d-4e80-8146-6a59f80dc069 (old id 7985005)
date added to LUP
2015-09-24 14:51:31
date last changed
2017-08-20 03:58:48
@article{129b520e-715d-4e80-8146-6a59f80dc069,
  abstract     = {We present a model for a feedback-controlled ratchet consisting of a Brownian particle and a moving, finite barrier that is shifted by an external agent depending on the position of the particle. By modifying the value of a single parameter of the feedback protocol, the model can act either as a pure rectifier, a power-stroke (PS) motor, or a combination of both. Interestingly, in certain situations the motor reaches a maximum efficiency for an intermediate value of that parameter, i.e., for a combination of the information ratchet and the PS mechanisms. We relate our results to the biological motors kinesin, myosin II, and myosin V, finding that these motors operate in a regime of length scales and forces where the efficiency is maximized for a combination of rectification and PS mechanisms.},
  articleno    = {065011},
  author       = {Schmitt, Regina and Parrondo, J. M. R. and Linke, Heiner and Johansson, Jonas},
  issn         = {1367-2630},
  keyword      = {molecular motor,Brownian ratchet,power-stroke,rectification of,fluctuations,efficiency,Shannon entropy,Brownian recitifier},
  language     = {eng},
  publisher    = {IOP Publishing Ltd.},
  series       = {New Journal of Physics},
  title        = {Molecular motor efficiency is maximized in the presence of both power-stroke and rectification through feedback},
  url          = {http://dx.doi.org/10.1088/1367-2630/17/6/065011},
  volume       = {17},
  year         = {2015},
}