SUBCELLULAR LOCATION: Endosome membrane {ECO:0000256|ARBA:ARBA00004238}; Lipid-anchor {ECO:0000256|ARBA:ARBA00004238}; Cytoplasmic side {ECO:0000256|ARBA:ARBA00004238}. Late endosome membrane {ECO:0000256|ARBA:ARBA00004577}; Lipid-anchor {ECO:0000256|ARBA:ARBA00004577}; Cytoplasmic side {ECO:0000256|ARBA:ARBA00004577}. Lysosome membrane {ECO:0000256|ARBA:ARBA00004122}; Lipid-anchor {ECO:0000256|ARBA:ARBA00004122}; Cytoplasmic side {ECO:0000256|ARBA:ARBA00004122}. SIMILARITY: Belongs to the LAMTOR1 family. {ECO:0000256|ARBA:ARBA00010861}. |