Interaction between Pyrrolidinium Based Ionic Liquid and Bovine Serum Albumin: A Spectroscopic and Molecular Docking Insight

Herein, we report the interaction of N, N-dimethyl-2-oxopyrrolidinium iodide with bovine serum albumin by using steady-state fluorescence, time-resolved fluorescence, UV-visible and Fourier Transform-Infrared spectroscopy in combination with molecular docking method. The steady state fluorescence spectra results confirmed that N, N-dimethyl2-oxopyrrolidinium iodide strongly quenches the intrinsic fluorescence of bovine serum albumin by a dynamic quenching mechanism as confirmed by time resolved fluorescence spectroscopy. The thermodynamic parameters (ΔH, ΔG and ΔS) showed that the binding process was spontaneous and enthalpy driven. Moreover, the interacting forces between bovine serum albumin and N, N-dimethyl-2-oxopyrrolidinium were mainly governed through hydrogen bond and van der Waals forces. The Fourier Transform-Infrared spectroscopy results show the conformational change of bovine serum albumin on binding with N, N-dimethyl-2-oxopyrrolidinium. Additionally, molecular modeling results revealed that N, N-dimethyl-2-oxopyrrolidinium binds with the amino acid residues of the sub domain IIA of bovine serum albumin. Interaction between Pyrrolidinium Based Ionic Liquid and Bovine Serum Albumin: A Spectroscopic and Molecular Docking Insight Rajan Patel1*, Meena Kumari1, Neeraj Dohare1, Abbul Bashar Khan1, Prashant Singh2, Maqsood Ahmad Malik3 and Amit Kumar4 1Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi, India 2Department of Chemistry, A. R. S. D. College, University of Delhi, Delhi, India 3Department of Chemistry, King Abdul Aziz University, Jeddah, Saudi Arabia 4Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Jakkasandra, Bangalore, India