Nonequilibrium-Driven Motion in Actin Networks: Comet Tails and Moving Beads

Details Nonequilibrium-Driven Motion in Actin Networks: Comet Tails and Moving Beads Nonequilibrium-Driven Motion in Actin Networks: Comet Tails and Moving Beads

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007phrvl..98w8302b&link_type=abstract

Physical Review Letters, vol. 98, Issue 23, id. 238302

Physics

Condensed Matter

Statistical Mechanics

6

Biopolymers, Biopolymerization, Classical Statistical Mechanics, Biomolecules: Structure And Physical Properties, Filaments, Microtubules, Their Networks, And Supramolecular Assemblies

Scientific paper

We present 3D dynamic Monte-Carlo simulations of the growth of an actin network close to an obstacle coated with Wiskott-Aldrich syndrome protein (WASP), an inducer of actin branching. Our simulations incorporate both elasticity and relaxation of the actin tail, thus allowing for local network compression. Whilst steady state motility derives mainly from polymerization at the leading edge, nonthermal stored elastic energy and retrograde flow are observed in a thin slab of material close to the obstacle. We observe a crossover from steady to hopping bead motion as the branching rate is decreased.

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