F-actin assembly in Dictyostelium cell locomotion and shape oscillations propagates as a self-organized reaction-diffusion wave.

Abstract:

:The crawling locomotion and shape of eukaryotic cells have been associated with the stochastic molecular dynamics of actin and its protein regulators, chiefly Arp2/3 and Rho family GTPases, in making a cytoskeleton meshwork within cell extensions. However, the cell's actin-dependent oscillatory shape and extension dynamics may also yield insights into locomotory mechanisms. Confocal observations of live Dictyostelium cells, expressing a green fluorescent protein-actin fusion protein, demonstrate oscillating supramolecular patterns of filamentous actin throughout the cell, which generate pseudopodia at the cell edge. The distinctively dissipative spatio-temporal behavior of these structures provides strong evidence that reversible actin filament assembly propagates as a self-organized, chemical reaction-diffusion wave.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Vicker MG

doi

10.1016/s0014-5793(01)03207-0

keywords:

subject

Has Abstract

pub_date

2002-01-02 00:00:00

pages

5-9

issue

1-2

eissn

0014-5793

issn

1873-3468

pii

S0014579301032070

journal_volume

510

pub_type

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