The function of RASD2 (RASD family member 2, ENSG00000100302) is as follows. GTPase signaling protein that binds to and hydrolyzes GTP. Regulates signaling pathways involving G protein-coupled receptor and heterotrimeric proteins such as GNB1, GNB2 and GNB3. May be involved in selected striatal competencies, mainly locomotor activity and motor coordination. {ECO:0000269|PubMed:11976265, ECO:0000269|PubMed:19255495}.