Contributes to proton-transporting ATPase activity, rotational mechanism. Predicted to be involved in cellular cation homeostasis; cellular response to increased oxygen levels; and vacuolar transport. Predicted to act upstream of or within cell projection organization and ion transport. Located in early endosome. Is expressed in several structures, including alimentary system; genitourinary system; hemolymphoid system gland; nervous system; and sensory organ. Orthologous to human ATP6V0D1 (ATPase H+ transporting V0 subunit d1). [provided by Alliance of Genome Resources, Apr 2022]