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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/7985005
- author
- Schmitt, Regina
LU
; Parrondo, J. M. R.
; Linke, Heiner
LU
and Johansson, Jonas
LU
- organization
- publishing date
- 2015
- 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
- article number
- 065011
- publisher
- IOP Publishing
- 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
- 2016-04-01 13:39:46
- date last changed
- 2023-11-12 19:55:07
@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.}},
author = {{Schmitt, Regina and Parrondo, J. M. R. and Linke, Heiner and Johansson, Jonas}},
issn = {{1367-2630}},
keywords = {{molecular motor; Brownian ratchet; power-stroke; rectification of; fluctuations; efficiency; Shannon entropy; Brownian recitifier}},
language = {{eng}},
publisher = {{IOP Publishing}},
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}},
doi = {{10.1088/1367-2630/17/6/065011}},
volume = {{17}},
year = {{2015}},
}