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  • Title: Molecular modeling and multispectroscopic studies of the interaction of mesalamine with bovine serum albumin.
    Author: Shahabadi N, Fili SM.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2014 Jan 24; 118():422-9. PubMed ID: 24076458.
    Abstract:
    The interaction of mesalamine (5-aminosalicylic acid (5-ASA)) with bovine serum albumin (BSA) was investigated by fluorescence quenching, absorption spectroscopy, circular dichroism (CD) techniques, and molecular docking. Thermodynamic parameters (ΔH<0 and ΔS 0) indicated that the hydrogen bond and electrostatic forces played the major role in the binding of 5-ASA to BSA. The results of CD and UV-vis spectroscopy showed that the binding of this drug to BSA induces some conformational changes in BSA. Displacement experiments predicted that the binding of 5-ASA to BSA is located within domain III, Sudlows site 2, that these observations were substantiated by molecular docking studies. In addition, the docking result shows that the 5-ASA in its anionic form mainly interacts with Gln-416 residue through one hydrogen bond between H atom of 5-ASA anion and the adjacent O atom of the hydroxyl group of Gln-416.
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