Investigating the binding mechanism of topiramate with bovine serum albumin using spectroscopic and computational methods

Faez Iqbal Khan, Md Tabish Rehman, Fathima Sameena, Tabish Hussain, Mohamed F. AlAjmi, Dakun Lai*, Md Khurshid Alam Khan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Various spectroscopic techniques involving fluorescence spectroscopy, circular dichroism (CD), and computational approaches were used to elucidate the molecular aspects of interaction between the antiepileptic drug topiramate and the multifunctional transport protein bovine serum albumin (BSA) under physiological conditions. Topiramate quenched BSA fluorescence in a static quenching mode, according to the Stern-Volmer quenching constant (Ksv) data derived from fluorescence spectroscopy for the topiramate-BSA complex. The binding constant was also used to calculate the binding affinity for the topiramate-BSA interaction. Fluorescence and circular dichroism experiments demonstrate that the protein's tertiary structure is affected by the microenvironmental alterations generated by topiramate binding to BSA. To establish the exact binding site, interacting residues, and interaction forces involved in the binding of topiramate to BSA, molecular modeling and simulation approaches were used. According to the Molecular Mechanics Poisson-Boltzmann Surface Area (MMPBSA) calculations, the average binding energy between topiramate and BSA is −421.05 kJ/mol. Topiramate was discovered to have substantial interactions with BSA, changing the structural dynamic and Gibbs free energy landscape patterns.

Original languageEnglish
Article numbere2958
JournalJournal of Molecular Recognition
Volume35
Issue number7
DOIs
Publication statusPublished - Jul 2022

Keywords

  • MD simulations
  • bovine serum albumin
  • circular dichroism
  • fluorescence quenching
  • topiramate

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