The Interaction Between Cholesterol and Human Serum Albumin

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The interaction between cholesterol and Human Serum Albumin (HSA) was studied by fluorescence technique. Addition of cholesterol causes decreasing of the fluorescence intensity of HSA and the mechanism can be attributed to static quenching. Both negative enthalpy and entropy change indicate this binding was an “enthalpy-driven” reaction. The number of binding site and distance between residues and ligands were also calculated: n=0.98, r=3.84nm. UV-vis spectra showed HSA molecules unfolded to some extent and the hydrophobicity was decreased in the presence of cholesterol.

Keywords: Cholesterol; hydrophobicity; quenching; thermodynamic parameter

Document Type: Research Article


Publication date: May 1, 2008

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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