Wiskostatin is a cell-permeable N-alkylated carbazole derivative that selectively blocks actin filament assembly. The compound acts as a selective, reversible inhibitor of N-WASP (neural Wiskott Aldrich syndrome protein), a signal integrating protein. Wiskostatin also binds to N-WASP, stabilize the autoinhibited conformation and prevent the activation of Arp2/3 (actin-related protein 2/3) complex.