Lysosomal integral membrane protein that may regulate MTORC1 complex translocation to lysosomes (PubMed:31036939). May play a role in autophagy (PubMed:31036939). . May activate Wnt/beta-catenin signaling to modulate epithelial cell function. . This is the function of GPR137 (G protein-coupled receptor 137, Ensembl gene identifier ENSG00000173264).