Spectroscopic investigation of the interaction of the toxicant, 2-naphthylamine, with bovine serum albumin |
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| Authors: | Liu Yan Chen Mingmao Bian Guangling Liu Junfeng Song Ling |
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| Institution: | The State Key Lab of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China. |
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| Abstract: | The mechanism of interaction between bovine serum albumin (BSA) and 2-naphthylamine (2-NA) in aqueous solution was investigated by fluorescence spectroscopy, circular dichroism (CD) spectra, and UV-vis spectroscopy. It was proved from fluorescence spectra that the fluorescence quenching of BSA by 2-NA was a result of the formation of complex between 2-NA and BSA, and the binding constants (K(a) ) as well as the numbers of binding sites for 2-NA in BSA were determined according to the modified Stern-Volmer equation. The results of synchronous fluorescence and CD spectra demonstrated 2-NA could decrease the amount of α-helix of BSA, leading to the loosening of protein skeleton. UV-vis spectroscopy and resonance light scattering spectra (RLS) results also suggested the conformation of BSA were changed and the BSA aggregation occured, which could induce toxic effects on the organism. |
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| Keywords: | 2‐Naphthylamine Bovine serum albumin Protein denaturation Carcinogen |
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