Predicted to enable ATP binding activity; ATP hydrolysis activity; and proton-transporting ATPase activity, rotational mechanism. Predicted to be involved in ATP metabolic process and proton transmembrane transport. Predicted to be part of proton-transporting V-type ATPase, V1 domain. Is an ortholog of C. elegans vha-13. In C. elegans, vha-13 is involved in lysosomal lumen acidification.