The receptor for advanced glycation end products (RAGE) plays a key role in mammal physiology and in the etiology and progression of inflammatory and oxidative stress-based diseases. In adults, RAGE expression is normally high only in the lung where the protein concentrates in the basal membrane of alveolar Type I epithelial cells. In diseases, RAGE levels increase in the affected tissues and sustain chronic inflammation. RAGE exists as a membrane glycoprotein with an ectodomain, a transmembrane helix and a short carboxyl-terminal tail, or as a soluble ectodomain that acts as a decoy receptor (sRAGE). VC1 domain is responsible for binding to the majority of RAGE ligands including advanced glycation end products (AGEs), S100 proteins and HMGB1. To ascertain whether other ligands exist, we analyzed by MS the material pulled-down by VC1 from human plasma. Twenty out of 295 identified proteins were selected and associated to coagulation and complement processes and to extracellular matrix.
Degani G, Altomare A, Digiovanni S, Arosio B, Fritz G, Raucci A, Aldini G, Popolo L. Prothrombin is a binding partner of the human Receptor of Advanced Glycation End products. J Biol Chem. 2020 Jul 14;jbc.RA120.013692. doi: 10.1074/jbc.RA120.013692