Predicted to enable ATPase-coupled intramembrane lipid transporter activity. Acts upstream of or within binding activity of sperm to zona pellucida and phospholipid translocation. Located in acrosomal vesicle. Is integral component of membrane. Is expressed in several structures, including heart; testis; trunk; and white fat. Orthologous to human ATP8B3 (ATPase phospholipid transporting 8B3). [provided by Alliance of Genome Resources, Apr 2022]