2 March 2017 Kinetic and thermodynamic study of bovine serum albumin interaction with rifampicin using surface plasmon resonance and molecular docking methods
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Abstract
The interaction of bovine serum albumin (BSA) with various drugs, such as antibiotics, due to the importance of BSA in drug delivery has attracted increasing research attention at present. Therefore, the aim of this study was investigation of BSA interaction with rifampicin using surface plasmon resonance (SPR) and molecular docking methods under the imitated physiological conditions ( pH = 7.4 ). BSA immobilization on carboxymethyl dextran hydrogel chip has been carried out after activation with N-hydroxysuccinimide/N-ethyl-N-(3-diethylaminopropyl) carbodiimide. The dose-response sensorgrams of BSA upon increasing concentration of refampicin were attained in SPR analysis. The high affinity of rifampicin to BSA was demonstrated by a low equilibrium constants ( K D ) value ( 3.46 × 10 5 at 40°C). The process of kinetic values changing shows that affinity of BSA to rifampicin decreased with rising temperature. The positive value of both enthalpy change ( Δ H ) and entropy change ( Δ S ) showed that hydrophobic force plays major role in the BSA interaction with rifampicin. The positive value of Δ G was indicative of nonspontaneous and enthalpy-driven binding process. In addition, according to the molecular docking study, hydrogen binding has some contributions in the interaction of rifampicin with BSA.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Maryam Sharifi, Jafar Ezzati Nazhad Dolatabadi, Farzaneh Fathi, Mohammad Rashidi, Behzad Jafari, Habib Tajalli, Mohammad-Reza Rashidi, "Kinetic and thermodynamic study of bovine serum albumin interaction with rifampicin using surface plasmon resonance and molecular docking methods," Journal of Biomedical Optics 22(3), 037002 (2 March 2017). https://doi.org/10.1117/1.JBO.22.3.037002 . Submission: Received: 15 November 2016; Accepted: 10 February 2017
Received: 15 November 2016; Accepted: 10 February 2017; Published: 2 March 2017
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