Involved in the activation of Ras protein signal transduction . Ras proteins bind GDP/GTP and possess intrinsic GTPase activity ( ).
Subcellular locations: Cell membrane, Golgi apparatus, Golgi apparatus membrane
The active GTP-bound form is localized most strongly to membranes than the inactive GDP-bound form (By similarity). Shuttles between the plasma membrane and the Golgi apparatus.
Subcellular locations: Nucleus, Cytoplasm, Cytoplasm, Perinuclear region
Colocalizes with RACK1 to the perinuclear region.
Widely expressed.