Enables several functions, including ATPase activator activity; ATPase binding activity; and GTP binding activity. Predicted to be involved in several processes, including Golgi vesicle transport; intracellular protein transport; and protein localization to Golgi apparatus. Predicted to act upstream of or within peptidyl-cysteine methylation. Located in membrane. Is active in presynapse. Colocalizes with Golgi apparatus. Orthologous to human RAB6A (RAB6A, member RAS oncogene family). [provided by Alliance of Genome Resources, Apr 2022]