Mechanics of biomimetic systems propelled by actin comet tails

Details Mechanics of biomimetic systems propelled by actin comet tails Mechanics of biomimetic systems propelled by actin comet tails

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aps..marv40007k&link_type=abstract

American Physical Society, 2009 APS March Meeting, March 16-20, 2009, abstract #V40.007

Physics

Scientific paper

The motility of intracellular bacterial pathogens such as Listeria monocytogenes is driven by filamentous actin comet tails in a variety of trajectories. Here, we present the in vitro study on the actin-based movements using spherical beads of different sizes coated with VCA protein, a partial domain of N-Wasp, in platelet extracts. Long term two-dimensional trajectories of the spherical beads motility show characteristic difference than those observed for bacteria, which have both elongated shape and asymmetric expression of the polymerization inducing enzyme. The trajectories also vary sensitively with the bead size and shape. These results provide a useful test to our new analytical model including the rotation of the bead relative to the tail.

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