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

Robert Insall, A Muller-Taubenberger, Laura Machesky, J Kohler, E Simmeth, SJ Atkinson, I Weber, G Gerisch

Research output: Contribution to journalArticle

107 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)115-128
Number of pages14
JournalCell Motility and the Cytoskeleton
Issue number3
Early online date1 Jan 2001
Publication statusPublished - 1 Nov 2001


Dive into the research topics of 'Dynamics of the Dictyostelium Arp2/3 complex in endocytosis, cytokinesis, and chemotaxis'. Together they form a unique fingerprint.

Cite this