Predicted to enable ATPase binding activity and proton-transporting ATPase activity, rotational mechanism. Predicted to act upstream of or within proton transmembrane transport. Part of vacuolar proton-transporting V-type ATPase, V1 domain. Human ortholog(s) of this gene implicated in autosomal recessive cutis laxa type IIC. Orthologous to human ATP6V1E1 (ATPase H+ transporting V1 subunit E1). [provided by Alliance of Genome Resources, Apr 2022]