Predicted to enable GTPase activator activity and guanyl-nucleotide exchange factor activity. Predicted to be involved in G protein-coupled receptor signaling pathway. Predicted to act upstream of or within adult locomotory behavior; dendrite morphogenesis; and phosphatidylinositol 3-kinase signaling. Predicted to be active in plasma membrane. Human ortholog(s) of this gene implicated in Klatskin's tumor. Orthologous to human PREX2 (phosphatidylinositol-3,4,5-trisphosphate dependent Rac exchange factor 2). [provided by Alliance of Genome Resources, Apr 2022]