Predicted to enable L-arginine transmembrane transporter activity and L-leucine transmembrane transporter activity. Predicted to be involved in amino acid transmembrane transport; cellular response to amino acid stimulus; and positive regulation of TOR signaling. Predicted to act upstream of or within amino acid transport. Predicted to be located in late endosome and lysosomal membrane. Predicted to be integral component of lysosomal membrane. Predicted to be part of Ragulator complex. Orthologous to human SLC38A9 (solute carrier family 38 member 9). [provided by Alliance of Genome Resources, Apr 2022]