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Title: Multiscale polar theory of microtubule and motor-protein assemblies

Journal Article · · Physical Review Letters
 [1];  [2];  [2];  [2];  [1]
  1. New York Univ. (NYU), New York, NY (United States)
  2. Univ. of Colorado, Boulder, CO (United States)

Microtubules and motor proteins are building blocks of self-organized subcellular biological structures such as the mitotic spindle and the centrosomal microtubule array. These same ingredients can form new “bioactive” liquid-crystalline fluids that are intrinsically out of equilibrium and which display complex flows and defect dynamics. It is not yet well understood how microscopic activity, which involves polarity-dependent interactions between motor proteins and microtubules, yields such larger-scale dynamical structures. In our multiscale theory, Brownian dynamics simulations of polar microtubule ensembles driven by cross-linking motors allow us to study microscopic organization and stresses. Polarity sorting and cross-link relaxation emerge as two polar-specific sources of active destabilizing stress. On larger length scales, our continuum Doi-Onsager theory captures the hydrodynamic flows generated by polarity-dependent active stresses. Finally, the results connect local polar structure to flow structures and defect dynamics.

Research Organization:
New York Univ. (NYU), NY (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-88ER25053
OSTI ID:
1343759
Alternate ID(s):
OSTI ID: 1180164
Journal Information:
Physical Review Letters, Vol. 114, Issue 4; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 105 works
Citation information provided by
Web of Science

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Cited By (47)

Microtubule and microtubule associated protein anomalies in psychiatric disease: MAP Anomalies in Psychiatric Disease journal May 2016
The instability of a sedimenting suspension of weakly flexible fibres journal September 2014
Active matter at the interface between materials science and cell biology journal July 2017
Kinesin-5-independent mitotic spindle assembly requires the antiparallel microtubule crosslinker Ase1 in fission yeast journal May 2017
Orientational order of motile defects in active nematics journal August 2015
Selection mechanism at the onset of active turbulence journal February 2019
Self-straining of actively crosslinked microtubule networks journal September 2019
Lamellar ordering, droplet formation and phase inversion in exotic active emulsions journal February 2019
From mechanical resilience to active material properties in biopolymer networks journal March 2019
An attraction–repulsion transition of force on wedges induced by active particles journal January 2018
Morphological transitions of axially-driven microfilaments journal January 2019
Self-assembling outside equilibrium: emergence of structures mediated by dissipation journal January 2019
Dry active turbulence in a model for microtubule–motor mixtures journal January 2019
Shape control and compartmentalization in active colloidal cells journal August 2015
Control of active liquid crystals with a magnetic field journal May 2016
Filament rigidity and connectivity tune the deformation modes of active biopolymer networks journal November 2017
Extensile motor activity drives coherent motions in a model of interphase chromatin journal October 2018
Data-driven quantitative modeling of bacterial active nematics journal December 2018
Self-organized dynamics and the transition to turbulence of confined active nematics journal February 2019
Antipolar ordering of topological defects in active liquid crystals journal September 2016
Effects of spatial dimensionality and steric interactions on microtubule-motor self-organization journal April 2019
Defect dynamics in active nematics
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  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 372, Issue 2029 https://doi.org/10.1098/rsta.2013.0365
journal November 2014
Vorticity, defects and correlations in active turbulence
  • Thampi, Sumesh P.; Golestanian, Ramin; Yeomans, Julia M.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 372, Issue 2029 https://doi.org/10.1098/rsta.2013.0366
journal November 2014
Tunable dynamics of microtubule-based active isotropic gels
  • Henkin, Gil; DeCamp, Stephen J.; Chen, Daniel T. N.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 372, Issue 2029 https://doi.org/10.1098/rsta.2014.0142
journal November 2014
Mechanisms of chromosome biorientation and bipolar spindle assembly analyzed by computational modeling posted_content October 2019
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Topological structure and dynamics of three-dimensional active nematics journal March 2020
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Chronology of motor-mediated microtubule streaming journal January 2019
Extensile motor activity drives coherent motions in a model of interphase chromatin posted_content May 2018
Chronology of motor-mediated microtubule streaming posted_content December 2018
Effects of spatial dimensionality and steric interactions on microtubule-motor self-organization. text January 2019
Effects of spatial dimensionality and steric interactions on microtubule-motor self-organization. text January 2020
Effects of spatial dimensionality and steric interactions on microtubule-motor self-organization. text January 2020
Tunable dynamics of microtubule based active isotropic gels text January 2014
Orientational order of motile defects in active nematics text January 2015
Instabilities, defects, and defect ordering in an overdamped active nematic preprint January 2015
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