Predicted to enable GDP binding activity. Involved in cellular protein catabolic process; endosome to lysosome transport; and positive regulation of macroautophagy. Acts upstream of or within cellular response to interferon-gamma. Located in cytoplasmic vesicle and vacuole. Orthologous to human RAB12 (RAB12, member RAS oncogene family). [provided by Alliance of Genome Resources, Apr 2022]