Predicted to be a structural constituent of cytoskeleton. Predicted to contribute to actin filament binding activity. Predicted to be involved in Arp2/3 complex-mediated actin nucleation. Predicted to be located in cytoskeleton. Predicted to be part of Arp2/3 protein complex. Is expressed in adult head. Orthologous to human ARPC3 (actin related protein 2/3 complex subunit 3).