Diffusion mechanisms of localised knots along a polymer
Metzler, R. ; Reisner, W. ; Riehn, R. ; Austin, R. ; Tegenfeldt, Jonas LU
and Sokolov, I. M.
(2006)
In Europhysics Letters
76(4).
p.696-702
- Abstract
- We consider the diffusive motion of a localised knot along a linear polymer chain. In particular, we derive the mean diffusion time of the knot before it escapes from the chain once it gets close to one of the chain ends. Self-reptation of the entire chain between either end and the knot position, during which the knot is provided with free volume, leads to an L-3 scaling of diffusion time; for sufficiently long chains, subdiffusion will enhance this time even more. Conversely, we propose local "breathing", i.e., local conformational rearrangement inside the knot region (KR) and its immediate neighbourhood, as additional mechanism. The contribution of KR-breathing to the diffusion time scales only quadratically, similar to L-2, speeding up... (More)
- We consider the diffusive motion of a localised knot along a linear polymer chain. In particular, we derive the mean diffusion time of the knot before it escapes from the chain once it gets close to one of the chain ends. Self-reptation of the entire chain between either end and the knot position, during which the knot is provided with free volume, leads to an L-3 scaling of diffusion time; for sufficiently long chains, subdiffusion will enhance this time even more. Conversely, we propose local "breathing", i.e., local conformational rearrangement inside the knot region (KR) and its immediate neighbourhood, as additional mechanism. The contribution of KR-breathing to the diffusion time scales only quadratically, similar to L-2, speeding up the knot escape considerably and guaranteeing finite knot mobility even for very long chains. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/376602
- author
- Metzler, R.
; Reisner, W.
; Riehn, R.
; Austin, R.
; Tegenfeldt, Jonas
LU
and Sokolov, I. M.
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Europhysics Letters
- volume
- 76
- issue
- 4
- pages
- 696 - 702
- publisher
- EDP Sciences
- external identifiers
-
- wos:000242210900024
- scopus:33751211854
- ISSN
- 0295-5075
- DOI
- 10.1209/epl/i2006-10312-5
- language
- English
- LU publication?
- yes
- id
- 831d4db5-e469-4bc3-9fd1-d869553f7bb3 (old id 376602)
- date added to LUP
- 2016-04-01 11:36:35
- date last changed
- 2022-03-05 03:46:17
@article{831d4db5-e469-4bc3-9fd1-d869553f7bb3,
abstract = {{We consider the diffusive motion of a localised knot along a linear polymer chain. In particular, we derive the mean diffusion time of the knot before it escapes from the chain once it gets close to one of the chain ends. Self-reptation of the entire chain between either end and the knot position, during which the knot is provided with free volume, leads to an L-3 scaling of diffusion time; for sufficiently long chains, subdiffusion will enhance this time even more. Conversely, we propose local "breathing", i.e., local conformational rearrangement inside the knot region (KR) and its immediate neighbourhood, as additional mechanism. The contribution of KR-breathing to the diffusion time scales only quadratically, similar to L-2, speeding up the knot escape considerably and guaranteeing finite knot mobility even for very long chains.}},
author = {{Metzler, R. and Reisner, W. and Riehn, R. and Austin, R. and Tegenfeldt, Jonas and Sokolov, I. M.}},
issn = {{0295-5075}},
language = {{eng}},
number = {{4}},
pages = {{696--702}},
publisher = {{EDP Sciences}},
series = {{Europhysics Letters}},
title = {{Diffusion mechanisms of localised knots along a polymer}},
url = {{http://dx.doi.org/10.1209/epl/i2006-10312-5}},
doi = {{10.1209/epl/i2006-10312-5}},
volume = {{76}},
year = {{2006}},
}