GTP-binding protein with GTPase activity, involved in the regulation of MAPK signaling pathway and thereby controlling multiple cellular processes (PubMed:31130282, PubMed:31130285, PubMed:39809765). Regulates craniofacial development (PubMed:31130282, PubMed:31130285). {ECO:0000269|PubMed:31130282, ECO:0000269|PubMed:31130285, ECO:0000269|PubMed:39809765}. This is the function of ENSG00000133818 (RRAS2, RAS related 2).