Laboratoire d'Enzymologie et Biochimie Structurale, CNRS, 91198 Gif-sur-Yvette, France. carlier@lebs.cnrs-gif.fr
The molecular link between the signalling pathway regulating the formation of filopodia and the initiation of local actin polymerization has been elucidated: N-WASP, a close homologue of WASP, which is the product of the gene responsible for the Wiskott-Aldrich syndrome, mediates a direct connection between the small G-protein Cdc42 and the Arp2/3 complex.