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• W2808294404 abstract "Molecular interactions and binding of probes/drugs with biomacromolecular systems are of fundamental importance in understanding the mechanism of action and hence designing of proactive drugs. In the present study, binding interactions of a biologically potent fluorophore, (E)-1,5-diphenyl-3-styryl-4,5-dihydro-1H-pyrazole (DSDP) with two serum transport proteins, human serum albumin and bovine serum albumin, have been investigated exploiting multi-spectroscopic techniques. The spectrophotometric and fluorometric studies together with fluorescence quenching, fluorescence anisotropy, urea induced denaturation studies and fluorescence lifetime measurements reveal strong binding of DSDP with both the plasma proteins. Going beyond the vast literature data mostly providing 1:1 probe-protein complexation, the present investigation portrays 2:1 probe-protein complex formation at higher relative probe concentration. A newer approach has been developed to have an estimate of the binding constants varying the concentration of the protein, instead of the usual practice of varying the probe. The binding constants for the 2:1 DSDP-protein complexes are determined to be 1.37 × 1010 M−2 and 1.47 × 1010 M−2 for HSA and BSA respectively, while those for the 1:1 complexation process come out to be 1.85 × 105 M−1 and 1.73 × 105 M−1 for DSDP-HSA and DSDP-BSA systems respectively. Thermodynamic analysis at different temperatures implies that the forces primarily involved in the binding process are hydrogen bonding and hydrophobic interactions. Competitive replacement studies with known site markers and molecular docking simulations direct to the possible locations and binding energies of DSDP with the two serum proteins, corroborating well with the experimental results." @default.
• W2808294404 created "2018-06-21" @default.
• W2808294404 creator A5023765631 @default.
• W2808294404 creator A5066385507 @default.
• W2808294404 date "2018-09-01" @default.
• W2808294404 modified "2023-09-27" @default.
• W2808294404 title "Unraveling the binding interaction of a bioactive pyrazole-based probe with serum proteins: Relative concentration dependent 1:1 and 2:1 probe-protein stoichiometries" @default.
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• W2808294404 doi "https://doi.org/10.1016/j.bpc.2018.06.001" @default.
• W2808294404 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29913331" @default.
• W2808294404 hasPublicationYear "2018" @default.
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