Affiliations 

  • 1 Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, 06560 Ankara, Turkey
  • 2 Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, 06560 Ankara, Turkey. Electronic address: mmbzahirulkabir@gmail.com
  • 3 Faculty of Science, Bioinformatics Programme, Institute of Biological Sciences, Malaysia; Centre of Research for Computational Sciences and Informatics for Biology, Bioindustry, Environment, Agriculture and Healthcare, University of Malaya, Kuala Lumpur, Malaysia
  • 4 Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, 06560 Ankara, Turkey. Electronic address: buslu@pharmacy.ankara.edu.tr
PMID: 38981287 DOI: 10.1016/j.saa.2024.124792

Abstract

Molecular interaction of entecavir (ETV) with the transport protein, albumin from bovine serum (BSA) was explored through multispectral and molecular docking approaches. The BSA fluorescence was appreciably quenched upon ETV binding and the quenching nature was static. The ETV-BSA complexation and the static quenching process were further reiterated using UV-visible absorption spectra. The binding constant (Ka) values of the complex were found as 1.47 × 104-4.0 × 103 M-1, which depicting a modarate binding strength in the ETV-BSA complexation. The experimental outcomes verified that the stable complexation was primarily influenced by hydrophobic interactions, hydrogen bonds and van der Waals forces. Synchronous and 3-D fluorescence spectral results demonstrated that ETV had significant impact on the hydrophobicity and polarity of the molecular environment near Tyr and Trp residues. Competitive site-markers displacement (with warfarin and ketoprofen) results discovered the suitable binding locus of ETV at site I in BSA. The molecular docking assessments also revealed that ETV formed hydrogen bonds and hydrophobic interactions with BSA, predominantly binding to site I (sub-domain IIA) of BSA.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.