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o-Alkylselenenylated Benzoic Acid Accesses Several Sites in Serum Albumin According to Fluorescence Studies, Raman Spectroscopy and Theoretical Simulations

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In the circulatory system, serum albumin (SA) is an important transporter of the majority of molecules with biological activity. We focused the current study on the anti-inflammatory compound, o-alkylselenenylated benzoic acid (ALKSEBEA), to determine its ability to access SA. Herein, we employed experimental procedures (fluorescence studies, Raman spectroscopy) and docking study on SA obtained from the Protein Data Bank and key conformers obtained from molecular dynamics simulations. The results show that ALKSEBEA accesses SA using a cooperative behavior according to fluorescence studies. In addition, the Raman results indicate that the ligand binding affects the backbone constituents. These results were confirmed by docking simulations tested on several SA conformers, which showed that ALKSEBEA bound on several sites on SA via π-π or π-cation interactions and that the ligand reaches other binding sites, where aromatic and basic residues as well as the backbone residues are involved.
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Keywords: Serum albumin; fluorescence and Raman spectroscopy; molecular dynamics and docking simulations; selenium

Document Type: Research Article

Publication date: June 1, 2013

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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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