

FOLLOWUS
a.Department of Physics, Zhejiang University of Science and Technology, Hangzhou 310023, China
b.Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310014, China
sunlizhen@zjut.edu.cn (L.Z.S.)
tingtingsun@zust.edu.cn (T.T.S.)
Received:08 May 2023,
Revised:2023-6-1,
Accepted:04 June 2023,
Online First:24 July 2023,
Published:01 January 2024
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Zuo, C. S.; Wang, K.; Sun, L. Z.; Sun, T. T. Molecular chaperone-dependent polymer translocation through nanopores: the effects of chaperone concentration and chaperone-polymer interaction. Chinese J. Polym. Sci. 2024, 42, 125–132
Chang-Sheng Zuo, Kang Wang, Li-Zhen Sun, et al. Molecular Chaperone-Dependent Polymer Translocation through Nanopores: The Effects of Chaperone Concentration and Chaperone-Polymer Interaction[J]. Chinese Journal of Polymer Science, 2024, 42(1): 125-132.
Zuo, C. S.; Wang, K.; Sun, L. Z.; Sun, T. T. Molecular chaperone-dependent polymer translocation through nanopores: the effects of chaperone concentration and chaperone-polymer interaction. Chinese J. Polym. Sci. 2024, 42, 125–132 DOI: 10.1007/s10118-023-3016-1.
Chang-Sheng Zuo, Kang Wang, Li-Zhen Sun, et al. Molecular Chaperone-Dependent Polymer Translocation through Nanopores: The Effects of Chaperone Concentration and Chaperone-Polymer Interaction[J]. Chinese Journal of Polymer Science, 2024, 42(1): 125-132. DOI: 10.1007/s10118-023-3016-1.
Chaperone-accompanied polymer translocation through an nanopore are theoretical studied by calculating free energy landscape and translocation time. The translocation dynamics can be controlled by tuning chaperone concentration and chaperone-polymer interaction. The chaperone-assisted
chaperone-independent
and chaperone-hindered translocation events are observed at different chaperone conditions.
The polymer translocation through a nanopore from a donor space (or named
cis
side) to a receiver space (
trans
side) in the chaperone-induced crowded environment has attracted increasing attention in recent years due to its significance in biological systems and technological applications. In this work
we mainly focus on the effects of chaperone concentration and chaperone-polymer interaction on the polymer translocation. By assuming the polymer translocation to be a quasi-equilibrium process
the free energy
F
of the polymer can be estimated by Rosenbluth-Rosenbluth method and then the translocation time
τ
can be calculated by Fokker-Plank equation based on the obtained free energy landscape. Our calculation results show that the translocation time can be controlled by independently tuning the chaperone concentration and chaperone-polymer interaction at the
cis
side or the
trans
side. There exists a critical chaperone-polymer attraction
ε
*
=−0.2 at which the volume exclusion and interaction effects of the chaperone can balance each other. Additionally
we also find that at large chaperone-polymer attraction
the translocation time is mainly governed by the diffusion coefficient of the polymer.
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