Predicted to enable phospholipid binding activity. Involved in positive regulation of cell migration; regulation of actin filament polymerization; and regulation of dendrite development. Located in several cellular components, including dendritic shaft; growth cone; and perinuclear region of cytoplasm. Orthologous to human PREX1 (phosphatidylinositol-3,4,5-trisphosphate dependent Rac exchange factor 1). [provided by Alliance of Genome Resources, Apr 2022]