May enhance cellular proliferation. May reduce growth inhibitory activity of CDKN2A. Predominantly cytoplasmic (PubMed:17962191). Predominantly nuclear (PubMed:17962191). Isoform 1 is O-glycosylated, while other isoforms are not. Predominant isoform. Overexpressed in about 67% of primary breast tumors. Belongs to the small GTPase superfamily. Rab family. Truncated N-terminus. Truncated N-terminus. Truncated N-terminus. Truncated N-terminus. Truncated N-terminus.