Volume 28 Issue 3
Jun.  2011
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XU Xing-tao, GUO Ming, WU Zhi-wu, LI Ming-hui, GAO Xing-jun, QIAN Ci. Binding interactions between rhaponticin and bovine serum albumin with mediation of metal ions[J]. Journal of Zhejiang A&F University, 2011, 28(3): 349-358. doi: 10.11833/j.issn.2095-0756.2011.03.002
Citation: XU Xing-tao, GUO Ming, WU Zhi-wu, LI Ming-hui, GAO Xing-jun, QIAN Ci. Binding interactions between rhaponticin and bovine serum albumin with mediation of metal ions[J]. Journal of Zhejiang A&F University, 2011, 28(3): 349-358. doi: 10.11833/j.issn.2095-0756.2011.03.002

Binding interactions between rhaponticin and bovine serum albumin with mediation of metal ions

doi: 10.11833/j.issn.2095-0756.2011.03.002
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  • Corresponding author: GUO Ming
  • Publish Date: 2011-06-20
通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Binding interactions between rhaponticin and bovine serum albumin with mediation of metal ions

doi: 10.11833/j.issn.2095-0756.2011.03.002
    Corresponding author: GUO Ming

Abstract: The interaction between rhaponticin (RT) and bovine serum albumin(BSA) was studied using fluorescence spectroscopy and absorbance spectra. Based on different theoretical models of fluorescence quenching,the binding constant (K) and binding sites (n) of the interactions were determined with the effects of metal ions on the interactions considered. The binding distance (r) and energy-transfer efficiency (E) between RT/RT-Co(Ⅱ)/RT-Ni(Ⅱ) and BSA were also obtained using the Fōrster theory of non-radiation energy transfer. Results showed that RT bound BSA by forming a stable complex and the micro-conformation of BSA changed greatly due to a hydrophobic change in the chemical environment of the fluorescence chromophores within the relevant subdomains of BSA. Therefore,metal ions Co(Ⅱ) and Ni(Ⅱ) could compete with RT-BSA interactions,thereby shortening the binding distance between RT and BSA;however,to precisely quantify the hydrophobic effect and micro-conformational changes of drugs on proteins,we suggest a new formula defining the entention degree ED.[Ch,8 fig. 3 tab. 31 ref.]

XU Xing-tao, GUO Ming, WU Zhi-wu, LI Ming-hui, GAO Xing-jun, QIAN Ci. Binding interactions between rhaponticin and bovine serum albumin with mediation of metal ions[J]. Journal of Zhejiang A&F University, 2011, 28(3): 349-358. doi: 10.11833/j.issn.2095-0756.2011.03.002
Citation: XU Xing-tao, GUO Ming, WU Zhi-wu, LI Ming-hui, GAO Xing-jun, QIAN Ci. Binding interactions between rhaponticin and bovine serum albumin with mediation of metal ions[J]. Journal of Zhejiang A&F University, 2011, 28(3): 349-358. doi: 10.11833/j.issn.2095-0756.2011.03.002

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