Neural Wiskott-Aldrich syndrome protein (N-WASP) (WASL)

Neural Wiskott-Aldrich syndrome protein (N-WASP), encoded by the WASL gene, is a critical regulator of the actin cytoskeleton (UniProt: P54612). It functions as a scaffold protein that, upon activation by Rho GTPases like Cdc42 and phosphoinositides, stimulates the Arp2/3 complex to nucleate branched actin filaments (PubMed: 9501027). This process is essential for various cellular activities, including cell migration, endocytosis, and intracellular trafficking. In the context of disease, N-WASP is frequently hijacked by pathogens such as Vaccinia virus and enteropathogenic E. coli to facilitate their movement and spread (PubMed: 15107404). Furthermore, its overexpression is associated with increased invasiveness and metastasis in several cancers, including breast and colorectal cancer (PubMed: 22431511). Therapeutic strategies targeting N-WASP, such as the small molecule inhibitor wiskostatin, aim to disrupt these pathological processes by preventing actin-mediated motility (PubMed: 10611969). However, because N-WASP is ubiquitously expressed and involved in fundamental cellular functions, achieving selectivity and minimizing systemic toxicity remain significant challenges in drug development.

Other names

N-WASPWiskott-Aldrich syndrome-like proteinNWASPWASP-like protein

Inhibition of N-WASP prevents the activation of the Arp2/3 complex, thereby blocking actin filament nucleation and branching (PubMed: 9501027).