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Title: Spontaneous motility of actin lamellar fragments
Author: Blanch Mercader, Carles
Casademunt i Viader, Jaume
Keywords: Polimerització
Polarització (Física nuclear)
Polarization (Nuclear physics)
Issue Date: 15-Feb-2013
Publisher: American Physical Society
Abstract: We show that actin lamellar fragments driven solely by polymerization forces at the bounding membrane are generically motile when the circular symmetry is spontaneously broken, with no need of molecular motors or global polarization. We base our study on a nonlinear analysis of a recently introduced minimal model [Callan-Jones et al Phys. Rev. Lett. 100, 258106 (2008)]. We prove the nonlinear instability of the center of mass and find an exact and simple relation between shape and center-of-mass velocity. A complex subcritical bifurcation scenario into traveling solutions is unfolded, where finite velocities appear through a nonadiabatic mechanism. Examples of traveling solutions and their stability are studied numerically
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2013, vol. 110, num. 7, p. 078102
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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