Neural Wiskott-Aldrich syndrome protein (N-WASP)

Neural Wiskott-Aldrich syndrome protein (N-WASP) is a ubiquitously expressed member of the Wiskott-Aldrich syndrome protein (WASP) family of cytoskeletal regulators. It acts as an actin nucleation–promoting factor by integrating upstream signals (notably from small GTPase Cdc42 and phosphoinositides such as PIP2) and activating the Arp2/3 complex, resulting in branched actin polymerization. Structurally, N-WASP contains several regulatory domains (including a CDC42-binding domain, proline-rich region, and a VCA output domain), and is autoinhibited until activated by upstream signals. N-WASP plays a critical role in dynamic actin rearrangement underlying cellular motility, morphology, endocytosis, cell adhesion, and stabilization of endothelial adherens junctions. Loss or dysregulation of N-WASP disrupts actin organization and cell junction stability, contributing to disease states such as increased vascular permeability, cancer metastasis, and possibly neurodegenerative or inflammatory conditions. N-WASP is a considered research target for diseases involving cytoskeletal dynamics, although it is not yet a widespread clinical therapeutic target.

Other names

N-WASPWASLneural WAS proteinWiskott-Aldrich syndrome-like protein

Inhibitors or modulators would act by altering N-WASP-mediated actin nucleation, via interference with the VCA (verprolin, cofilin, acidic) domain or regulatory protein-protein interactions (e.g., with Cdc42, Arp2/3, or p120-catenin)