Enables amino acid transmembrane transporter activity. Acts upstream of or within neutral amino acid transport and proton transmembrane transport. Predicted to be located in endoplasmic reticulum; lysosome; and plasma membrane. Is expressed in alimentary system; nervous system; rib; and urethra. Orthologous to human SLC36A1 (solute carrier family 36 member 1). [provided by Alliance of Genome Resources, Apr 2022]