Non-equilibrium forces drive the anomalous diffusion of telomeres in the nucleus of mammalian cells
Non-equilibrium forces drive the anomalous diffusion of telomeres in the nucleus of mammalian cells
复制标题
非平衡力驱动哺乳动物细胞核中端粒的异常扩散
DOI:
10.1088/1367-2630/aa8fe1
复制
发表时间:
2017
影响因子:
3.3
通讯作者:
M. Weiss
中科院分区:
文献类型:
--
作者:
L. Stadler ;M. Weiss
Telomeres are vital nucleotide sequences at both ends of each chromosome, and their motion reports on the local dynamics of decondensed chromatin in the nucleus of interphase cells. Here, we show that the previously reported subdiffusive motion of telomeres is driven by non-equilibrium cytoskeletal forces. In particular, breaking down microtubules leads to a significantly reduced generalized diffusion coefficient of telomeres. This translates into a markedly reduced effective temperature in the stochastic forces that govern the telomeres' random walk. Moreover, telomere motion in cells that lack microtubules is well described by the monomer dynamics of a Rouse polymer that is embeddded in a viscoelastic medium. In contrast, active cytoskeletal forces in untreated cells override the environment's elastic contributions, resulting in the well-known scaling for conventional Rouse dynamics in viscous media. Our data highlight that even subdiffusive motion in cells in most cases may not be a simple thermal transport process but rather is driven by non-equilibrium events.
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影响因子:
3.4
作者:
Weber, Stephanie C.;Thompson, Michael A.;Theriot, Julie A.
通讯作者:
Theriot, Julie A.
影响因子:
9.2
作者:
N. Pawar;C. Donth ;M. Weiss
通讯作者:
M. Weiss
DOI:
10.1103/physreve.82.011913
发表时间:
2010-07
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
Weber SC;Theriot JA;Spakowitz AJ
通讯作者:
Spakowitz AJ
影响因子:
16.6
作者:
Bronshtein I;Kepten E;Kanter I;Berezin S;Lindner M;Redwood AB;Mai S;Gonzalo S;Foisner R;Shav-Tal Y;Garini Y
通讯作者:
Garini Y