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  • Title: Studies on the interaction between chromium(VI) and human serum albumin: spectroscopic approach.
    Author: Zhang GC, Xu JY, Wang YQ.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2012 Feb; 86():381-6. PubMed ID: 22133699.
    Abstract:
    The interaction between Cr(2)O(7)(2-) and human serum albumin (HSA) was investigated using fluorescence, UV/vis, FT-IR, CD spectroscopy, and molecular modeling method. The experimental results showed that the fluorescence quenching of HSA by Cr(2)O(7)(2-) is a result of the formation of HSA-chromium(VI) complex; static quenching was confirmed to result in the fluorescence quenching. The corresponding thermodynamic parameters showed that the process of binding Cr(2)O(7)(2-) on HSA was a spontaneous molecular interaction procedure. Ionic, H-bonds and van der Waals interactions play a major role in stabilizing the complex. The Cr(2)O(7)(2-) altered the environments of Trp and Tyr residues in HSA.
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