Proteazom-aktivirani receptor 4 (PAR4), ili Receptoru koagulacionog faktora II (trombina) sličan 3, je protein kodiran F2RL3genom kod ljudi.[1]
F2RL3 je član velike familije G-protein spregnutih receptora koji interaguju sa guanozin-nukleotid-vezujućim proteinima. PAR4 je takođe član familije proteazom aktiviranih receptora. On je aktiviran trombinom i tripsinom. Do aktivacije dolazi proteolitičkim odsecanjem njegovog ekstracelularnog amino terminusa. Novo-formirani amino terminus dejstvuje kao vezani ligand i aktivira receptor.[1]
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Wu CC, Hwang TL, Liao CH, et al. (2004). „The role of PAR4 in thrombin-induced thromboxane production in human platelets.”. Thromb. Haemost.90 (2): 299–308. DOI:10.1267/THRO03020299. PMID12888878.
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„Protease-Activated Receptors: PAR4”. IUPHAR Database of Receptors and Ion Channels. International Union of Basic and Clinical Pharmacology. Arhivirano iz originala na datum 2012-04-02.