Probably involved in the organization of the actin cytoskeleton. May act downstream of CDC42 to induce actin filament assembly leading to cell shape changes. Induces pseudopodia formation in fibroblasts. Interacts with RHOQ and CDC42, in a GTP-dependent manner, and with SEPT7. Highly expressed in the heart and weakly in the brain. Belongs to the BORG/CEP family.