Downstream effector molecules involved in the transmission of signals from tyrosine kinase receptors and small GTPases to the actin cytoskeleton. Plays a role in the regulation of cell morphology and cytoskeletal organization. Required in the control of cell shape. Binds actin and the Arp2/3 complex. Expressed in ovary and brain. Binds the Arp2/3 complex through the C-terminal region and actin through verprolin homology (VPH) domain. Phosphorylation by ABL1 promotes lamellipodia formation and cell migration. Belongs to the SCAR/WAVE family.