May function as an amino acid transporter mediating the export of cationic amino acids from the vacuole. Required for optimal growth in synthetic medium. Up-regulated by addition of ammonia or amino acids to a nitrogen-depleted medium. Down-regulated by excess lysine. Resistant to fluconazole. Increased resistance to caspofungin. Suppresses CDC13-1 temperature sensitivity. Belongs to the laat-1 family.