Enables phosphatidylserine flippase activity. Involved in learning; positive regulation of cell migration; and regulation of membrane lipid distribution. Located in cytoplasmic vesicle and organelle membrane. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; respiratory system; and sensory organ. Orthologous to human ATP8A1 (ATPase phospholipid transporting 8A1). [provided by Alliance of Genome Resources, Apr 2022]