Development of antithrombotic peptides based on the molecular interactions between von Willebrand factor and GPIbα

• Published in: Physical chemistry chemical physics : PCCP Vol. 24; no. 37; pp. 2267 - 22678
• Main Authors: Chen, Ran, Zheng, Si, Zhang, Lin
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 28.09.2022
• Subjects: Adhesion; Amino acids; Binding; Domains; Molecular dynamics; Molecular interactions; Peptides; Platelets; Residues; Thrombosis
• ISSN: 1463-9076; 1463-9084; 1463-9084
• DOI: 10.1039/d2cp03148e

Binding of platelets on vascular endothelia at the damaged site using von Willebrand factor (vWF) as a bridge is of great significance for platelet adhesion and subsequent arterial thrombosis. Molecular interactions between vWF and a receptor on a platelet surface, GPIbα, were studied by molecular dynamics (MD) simulations and molecular mechanics-Poisson-Boltzmann surface area (MM-PBSA) analysis. Key amino acid residues were identified based on the contribution to the binding of GPIbα and the vWF A1 domain. A vWF-targeting inhibitor library with the amino acid sequence EXEXXDXD (where X represents any of the 20 natural amino acid residues) was then established based on the molecular interactions between GPIbα and the vWF A1 domain, subject to subsequent screening using docking, MD simulations, etc. Two efficient inhibitors including EGEPWDGD and EAEPWDPD were obtained, with experimental validation on their abilities to bind on the vWF and inhibiting platelet adhesion. The molecular interactions between vWF and GPIbα were investigated by MD simulations and MM-PBSA analysis, and then used for the design of inhibitors. Effective inhibitors EGEPWDGD and EAEPWDPD were obtained and validated.