Predicted to be involved in Arp2/3 complex-mediated actin nucleation and actin filament polymerization. Predicted to be located in actin cytoskeleton. Predicted to be part of Arp2/3 protein complex. Is an ortholog of C. elegans arx-4. In C. elegans, arx-4 is involved in epithelial cell migration and morphogenesis of embryonic epithelium.