Predicted to enable GDP binding activity. Predicted to be involved in several processes, including cellular response to insulin stimulus; endosome to lysosome transport; and secretion by cell. Predicted to act upstream of or within cellular response to interferon-gamma. Located in secretory granule. Orthologous to human RAB12 (RAB12, member RAS oncogene family). [provided by Alliance of Genome Resources, Apr 2022]