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. Four of them contained a γ-carboxyl glutamic acid (Gla)-domain, a calcium-binding module, and prothrombin (PT) was the most abundant. Using MicroScale Thermophoresis, we quantified the interaction of PT with VC1 and sRAGE in the absence or presence of calcium that acted as a competitor. PT devoid of the Gla-domain (PT des-Gla) did not bind to sRAGE, providing further evidence that the Gla-domain is critical for the interaction. Finally, the presence of VC1 delayed plasma clotting in a dose-dependent manner. We propose that RAGE is involved in modulating blood coagulation presumably in conditions of lung injury.

Prothrombin is a binding partner of the human Receptor of Advanced Glycation End products / G. Degani, A. Altomare, S. Digiovanni, B. Arosio, G. Fritz, A. Raucci, G. Aldini, L. Popolo. - In: THE JOURNAL OF BIOLOGICAL CHEMISTRY. - ISSN 0021-9258. - (2020). [Epub ahead of print] [10.1074/jbc.RA120.013692]

Prothrombin is a binding partner of the human Receptor of Advanced Glycation End products

G. Degani
Primo
;
A. Altomare
Secondo
;
S. Digiovanni;B. Arosio;G. Aldini
Penultimo
;
L. Popolo
Ultimo
2020

Abstract

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. Four of them contained a γ-carboxyl glutamic acid (Gla)-domain, a calcium-binding module, and prothrombin (PT) was the most abundant. Using MicroScale Thermophoresis, we quantified the interaction of PT with VC1 and sRAGE in the absence or presence of calcium that acted as a competitor. PT devoid of the Gla-domain (PT des-Gla) did not bind to sRAGE, providing further evidence that the Gla-domain is critical for the interaction. Finally, the presence of VC1 delayed plasma clotting in a dose-dependent manner. We propose that RAGE is involved in modulating blood coagulation presumably in conditions of lung injury.
Gla-domain; Pattern recognition receptor (PRR); Protein gamma-carboxylation; Scavenger receptor; biophysics; coagulation factor; complement system; lung; mass spectrometry (MS); molecular cell biology; plasma; protein-protein interaction; prothrombin; receptor for advanced glycation end products (RAGE)
Settore BIO/12 - Biochimica Clinica e Biologia Molecolare Clinica
Settore BIO/13 - Biologia Applicata
Settore CHIM/08 - Chimica Farmaceutica
Settore BIO/10 - Biochimica
Settore BIO/11 - Biologia Molecolare
2020
14-lug-2020
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/753722
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