Structural and energetic evolution of fibrinogen toward to the betablocker interactions

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Gonzalez Durruthy, M (Autor) Outra; Scanavachi, G (Autor) Outra; Rial, R (Autor) Outra; Liu, Z (Autor) Outra; Natalia N D S Cordeiro (Autor) FCUP; Itri, R (Autor) Outra; Ruso, JM (Autor) Outra

Revista

Título: International Journal of Biological Macromolecules

Vol. 137

Páginas: 405-419

ISSN: 0141-8130

Editora: Elsevier

Indexação

ISI Web of Knowledge - 7 Citações

Scopus - 6 Citações

Outras Informações

ID Authenticus: P-00Q-S2W

DOI: 10.1016/j.ijbiomac.2019.06.229

Abstract (EN): We present a computational analysis coupled with experimental studies, focusing on the binding-interaction between beta-adrenoreceptor blocking agents (acebutolol and propranolol) with fibrinogen protein (E-region). Herein, computational modeling on structural validation and flexibility properties of fibrinogen E-region showed that the E-region interacting residues, which form the funnel-shaped hydrophobic cavity for ligand-binding, can be efficiently modeled. The obtained free energy of binding (FEB) values for the docking complexes, namely acebutolol/fibrinogen E-region and propranolol/fibrinogen E-region, were very close and amounted to 6.9 kcal/mol and - 6.8 kcal/mol, respectively. They were supported by a high binding-accuracy (R.M.S.D < 2 angstrom) for the best crystallographic binding-poses in both cases. In this regard, we identify a docking-mechanism of interaction for the propranolol and acebutolol mainly based on non-covalent hydrophobic contacts with the fibrinogen E-region binding-site. Besides, the beta-adrenoreceptor blocking agents are able to induce local perturbations affecting particularly the fibrinogen E-region allosteric residues linked to significant changes in the inter-residue communication and flexibility properties of residue network. In this sense, we show that the key biophysical parameters like frequency and collectivity degree may be compromised in different ways by the interaction with acebutolol and propranolol. Isothermal titration calorimetry, zeta potential and small angle X-ray scattering (SAXS) measurements were performed to complete and corroborate computational analysis. The combined experimental results point out that acebutolol acts to a lesser extent to fibrinogen structure than propranolol.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 15