Molecular motor efficiency is maximized in the presence of both power-stroke and rectification through feedback
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 pur...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2015-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/17/6/065011 |
| _version_ | 1797751175442857984 |
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| author | R K Schmitt J M R Parrondo H Linke J Johansson |
| author_facet | R K Schmitt J M R Parrondo H Linke J Johansson |
| author_sort | R K Schmitt |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-12T16:43:42Z |
| format | Article |
| id | doaj.art-9431df384f22415fb703151c75d3cf82 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:43:42Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-9431df384f22415fb703151c75d3cf822023-08-08T14:19:30ZengIOP PublishingNew Journal of Physics1367-26302015-01-0117606501110.1088/1367-2630/17/6/065011Molecular motor efficiency is maximized in the presence of both power-stroke and rectification through feedbackR K Schmitt0J M R Parrondo1H Linke2J Johansson3Solid State Physics and Nanometer Structure Consortium (nm C@ LU), Lund University, PO Box 118, SE-221 00 Lund, SwedenDepartamento de Fisica Atómica, Molecular y Nuclear and GISC, Universidad Complutense de Madrid, E-28040 Madrid, SpainSolid State Physics and Nanometer Structure Consortium (nm C@ LU), Lund University, PO Box 118, SE-221 00 Lund, SwedenSolid State Physics and Nanometer Structure Consortium (nm C@ LU), Lund University, PO Box 118, SE-221 00 Lund, SwedenWe 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.https://doi.org/10.1088/1367-2630/17/6/065011molecular motorBrownian ratchetpower-strokerectification of fluctuationsefficiencyShannon entropy |
| spellingShingle | R K Schmitt J M R Parrondo H Linke J Johansson Molecular motor efficiency is maximized in the presence of both power-stroke and rectification through feedback New Journal of Physics molecular motor Brownian ratchet power-stroke rectification of fluctuations efficiency Shannon entropy |
| title | Molecular motor efficiency is maximized in the presence of both power-stroke and rectification through feedback |
| title_full | Molecular motor efficiency is maximized in the presence of both power-stroke and rectification through feedback |
| title_fullStr | Molecular motor efficiency is maximized in the presence of both power-stroke and rectification through feedback |
| title_full_unstemmed | Molecular motor efficiency is maximized in the presence of both power-stroke and rectification through feedback |
| title_short | Molecular motor efficiency is maximized in the presence of both power-stroke and rectification through feedback |
| title_sort | molecular motor efficiency is maximized in the presence of both power stroke and rectification through feedback |
| topic | molecular motor Brownian ratchet power-stroke rectification of fluctuations efficiency Shannon entropy |
| url | https://doi.org/10.1088/1367-2630/17/6/065011 |
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