Predicted to be involved in Arp2/3 complex-mediated actin nucleation and regulation of 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-7. In C. elegans, arx-7 is involved in Arp2/3 complex-mediated actin nucleation; epithelial cell migration; and morphogenesis of embryonic epithelium.