Comparative study of the interactions between bisphenol-A and its endocrine disrupting analogues with bovine serum albumin using multi-spectroscopic and molecular docking studies

Abstract

Interaction studies of bisphenol analogues; biphenol-A (BPA), bisphenol-B (BPB), and bisphenol-F (BPF) with bovine serum albumin (BSA) were performed using multi-spectroscopic and molecular docking studies at the protein level. The mechanism of binding of bisphenols with BSA was dynamic in nature. SDS refolding experiments demonstrated no stabilization of BSA structure denatured by BPB, however, BSA denatured by BPA and BPF was found to get stabilized. Also, CD spectra and molecular docking studies revealed that BPB bound more strongly and induced more conformational changes in BSA in comparison to BPA. Hence, this study throws light on the replacement of BPA by its analogues and whether the replacement is associated with a possible risk, raising a doubt that perhaps BPB is not a good substitute of BPA.

Keywords:

• interaction
• bovine serum albumin
• bisphenol-F
• bisphenol-B
• spectroscopic studies

Acknowledgments

Authors are thankful to the Indian Council of Medical Research (ICMR) New Delhi, for financial assistance to AU as ICMR-JRF award. TRF spectra were recorded at the Advanced Instrumentation Research Facility, Jawaharlal Nehru University, New Delhi.