Predicted to enable ATPase binding activity. Predicted to be involved in several processes, including excretion; sensory perception of sound; and vacuolar acidification. Predicted to act upstream of or within proton transmembrane transport. Located in apical plasma membrane. Human ortholog(s) of this gene implicated in renal tubular acidosis. Orthologous to human ATP6V0A4 (ATPase H+ transporting V0 subunit a4). [provided by Alliance of Genome Resources, Apr 2022]