Predicted to enable GTP binding activity; GTPase activity; and phospholipase D activator activity. Predicted to be involved in several processes, including Golgi organization; protein localization to Golgi apparatus; and retrograde transport, endosome to Golgi. Predicted to be located in trans-Golgi network. Predicted to be active in Golgi apparatus. Is expressed in anterior axial hypoblast; axial chorda mesoderm; axis; notochord; and polster. Orthologous to human ARL1 (ARF like GTPase 1).