Rational Design of Protein C Activators.Barranco-Medina, S., Murphy, M., Pelc, L., Chen, Z., Di Cera, E., Pozzi, N.
(2017) Sci Rep 7: 44596-44596
- PubMed: 28294177
- DOI: 10.1038/srep44596
- PubMed Abstract:
- Structural basis for the anticoagulant activity of the thrombin-thrombomodulin complex.
Fuentes-Prior, P.,Iwanaga, Y.,Huber, R.,Pagila, R.,Rumennik, G.,Seto, M.,Morser, J.,Light, D.R.,Bode, W.
(2000) Nature 404: 518
In addition to its procoagulant and proinflammatory functions mediated by cleavage of fibrinogen and PAR1, the trypsin-like protease thrombin activates the anticoagulant protein C in a reaction that requires the cofactor thrombomodulin and the endoth ...
In addition to its procoagulant and proinflammatory functions mediated by cleavage of fibrinogen and PAR1, the trypsin-like protease thrombin activates the anticoagulant protein C in a reaction that requires the cofactor thrombomodulin and the endothelial protein C receptor. Once in the circulation, activated protein C functions as an anticoagulant, anti-inflammatory and regenerative factor. Hence, availability of a protein C activator would afford a therapeutic for patients suffering from thrombotic disorders and a diagnostic tool for monitoring the level of protein C in plasma. Here, we present a fusion protein where thrombin and the EGF456 domain of thrombomodulin are connected through a peptide linker. The fusion protein recapitulates the functional and structural properties of the thrombin-thrombomodulin complex, prolongs the clotting time by generating pharmacological quantities of activated protein C and effectively diagnoses protein C deficiency in human plasma. Notably, these functions do not require exogenous thrombomodulin, unlike other anticoagulant thrombin derivatives engineered to date. These features make the fusion protein an innovative step toward the development of protein C activators of clinical and diagnostic relevance.
Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO 63104 USA.