Dynamics of the Dictyostelium Arp2/3 complex in endocytosis, cytokinesis, and chemotaxis

Insall, R. , Müller-Taubenberger, A., Machesky, L. , Köhler, J., Simmeth, E., Atkinson, S. J., Weber, I. and Gerisch, G. (2001) Dynamics of the Dictyostelium Arp2/3 complex in endocytosis, cytokinesis, and chemotaxis. Cell Motility and the Cytoskeleton, 50(3), pp. 115-128. (doi:10.1002/cm.10005) (PMID:11807934)

Full text not currently available from Enlighten.

Abstract

The Arp2/3 complex is a ubiquitous and important regulator of the actin cytoskeleton. Here we identify this complex from Dictyostelium and investigate its dynamics in live cells. The predicted sequences of the subunits show a strong homology to the members of the mammalian complex, with the larger subunits generally better conserved than the smaller ones. In the highly motile cells of Dictyostelium, the Arp2/3 complex is rapidly re-distributed to the cytoskeleton in response to external stimuli. Fusions of Arp3 and p41-Arc with GFP reveal that in phagocytosis, macropinocytosis, and chemotaxis the complex is recruited within seconds to sites where actin polymerization is induced. In contrast, there is little or no localization to the cleavage furrow during cytokinesis. Rather the Arp2/3 complex is enriched in ruffles at the polar regions of mitotic cells, which suggests a role in actin polymerization in these ruffles.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Machesky, Professor Laura and Insall, Professor Robert
Authors: Insall, R., Müller-Taubenberger, A., Machesky, L., Köhler, J., Simmeth, E., Atkinson, S. J., Weber, I., and Gerisch, G.
College/School:College of Medical Veterinary and Life Sciences > Institute of Cancer Sciences
Journal Name:Cell Motility and the Cytoskeleton
Publisher:Wiley
ISSN:0886-1544
ISSN (Online):1097-0169
Published Online:27 November 2001

University Staff: Request a correction | Enlighten Editors: Update this record