Predicted to enable ATPase binding activity. Involved in nematode larval development. Located in apical plasma membrane. Part of vacuolar proton-transporting V-type ATPase complex. Expressed in Psub2; excretory cell; hypodermis; pharyngeal-intestinal valve; and uterus. Human ortholog(s) of this gene implicated in several diseases, including autosomal recessive cutis laxa type IIA; autosomal recessive osteopetrosis 1; and developmental and epileptic encephalopathy 104. Is an ortholog of several human genes including ATP6V0A1 (ATPase H+ transporting V0 subunit
a1); ATP6V0A2 (ATPase H+ transporting V0 subunit
a2); and TCIRG1 (T cell immune regulator 1, ATPase H+ transporting V0 subunit
a3).