Amino acid transporter that specifically mediates the pH-dependent export of the cationic amino acids arginine, histidine and lysine from lysosomes (PubMed:22822152). May play a role in the degradation of autophagic substrates in autolysosomes by regulating lysosome function (PubMed:25124690). The di-leucine motif mediates lysosomal localization. Mutants are viable but develop slowly. They accumulate enlarged lysosomes and show an impaired lysosomal degradation of phagocytic, endocytic, and autophagic cargos. Belongs to the laat-1 family.