Probable Ras GTPase-activating protein

GTPase-activating protein, which acts as a negative regulator for some members of the Ras family (By similarity). Probably decreases their signaling activity by stimulating their intrinsic GTPase activity, thereby lowering the levels of the GTP-bound active form (By similarity). Functions with DE-cadherin (shg) to promote embryonic border cell (BC) migration and adhesion by regulating the distribution of actin protrusions in BCs (PubMed:30763317). Promotes shg-mediated adhesion at the BC interfaces and likely maintains BC cluster adhesion during BC detachment from the follicular epithelium and subsequent BC migration (PubMed:30763317). Also required for restricting the development of actin-rich protrusions to the front of migrating BC clusters thus ensuring unidirectional BC migration (PubMed:30763317). Possibly functions by suppressing Rac1 signaling in non-leading BCs, thus limiting its activity to leading BCs where it initiates localized actin cytoskeleton remodeling to produce the polarized protrusions (PubMed:30763317).