Acts as an adapter for the phosphatase MTMR2 to regulate MTMR2 catalytic activity and subcellular location . May function as a guanine nucleotide exchange factor (GEF) activating RAB28 . Promotes the exchange of GDP to GTP, converting inactive GDP-bound Rab proteins into their active GTP-bound form . Inhibits myoblast differentiation in vitro and induces oncogenic transformation in fibroblasts .
Subcellular locations: Cytoplasm, Cytoplasm, Perinuclear region