Enables L-aspartate transmembrane transporter activity and neutral amino acid transmembrane transporter activity. Involved in L-aspartate import across plasma membrane and transport across blood-brain barrier. Located in basal plasma membrane. Is active in plasma membrane. Is expressed in several structures, including alimentary system; brain; genitourinary system; liver; and respiratory system. Orthologous to human SLC1A5 (solute carrier family 1 member 5). [provided by Alliance of Genome Resources, Apr 2022]