FEATURES

FAMILY

DESCRIPTION

Also known as SORT_MOUSE, Sort1. Functions as a sorting receptor in the Golgi compartment and as a clearance receptor on the cell surface. Required for protein transport from the Golgi apparatus to the lysosomes by a pathway that is independent of the mannose-6-phosphate receptor (M6PR). Lysosomal proteins bind specifically to the receptor in the Golgi apparatus and the resulting receptor-ligand complex is transported to an acidic prelysosomal compartment where the low pH mediates the dissociation of the complex. The receptor is then recycled back to the Golgi for another round of trafficking through its binding to the retromer. Also required for protein transport from the Golgi apparatus to the endosomes. Promotes neuronal apoptosis by mediating endocytosis of the proapoptotic precursor forms of BDNF (proBDNF) and NGFB (proNGFB). Also acts as a receptor for neurotensin. May promote mineralization of the extracellular matrix during osteogenic differentiation by scavenging extracellular LPL. Probably required in adipocytes for the formation of specialized storage vesicles containing the glucose transporter SLC2A4/GLUT4 (GLUT4 storage vesicles, or GSVs). These vesicles provide a stable pool of SLC2A4 and confer increased responsiveness to insulin. May also mediate transport from the endoplasmic reticulum to the Golgi. Interacts with the cytosolic adapter proteins GGA1 and GGA2. Interacts with numerous ligands including the receptor-associated protein LRPAP1/RAP, NTS and GM2A. Forms a complex with NGFR which binds specifically to the precursor forms of NGFB (proNGFB) and BDNF (proBDNF). Interacts with the Trk receptors NTRK1, NTRK2 and NTRK3; may regulate their anterograde axonal transport and signaling (By similarity). Interacts with LPL (PubMed:10085125). Interacts with PSAP (PubMed:15236332). Interacts with SLC2A4 (PubMed:15992544). Interacts with NRADD and NGFR (PubMed:19407813). Interaction with NRADD protects against degradation in the lysosome. Interacts with CLN5 (By similarity). Interacts with GRN; this interaction mediates endocytosis and lysosome delivery of progranulin; interaction occurs at the neuronal cell surface in a stressed nervous system (By similarity). Interacts with the heterotrimeric retromer cargo-selective complex (CSC), also described as vacuolar protein sorting subcomplex (VPS), formed by VPS26 (VPS26A or VPS26B), VPS29 and VPS35; which is involved in retrograde trafficking of the receptor from endosomes to the Golgi apparatus (By similarity). Interacts with SMPD1; the interaction is required for SMPD1 targeting to lysosomes (By similarity).

EXTERNAL LINKS

Sort1

Sortilin

Sort1

Molecular Synopsis