食品科学 ›› 2009, Vol. 30 ›› Issue (17 ): 130-133.doi: 10.7506/spkx1002-6630-200917030

• 基础研究 • 上一篇    下一篇

光谱法研究雷公藤红素与牛血清白蛋白的结合反应

张 婷1,徐 慧2,李桂华2,柳成荫3,邹 宁1,张 鑫2,柳全文2 ,*   

  1. 1.鲁东大学生命科学学院,山东烟台 264025;2.鲁东大学化学与材料科学学院,山东烟台 264025;
    3.山东省栖霞市第一中学生物组,山东栖霞 265300
  • 收稿日期:2009-06-10 出版日期:2009-09-01 发布日期:2014-04-14
  • 通讯作者: 柳全文 E-mail:qwliu2001@yahoo.com.cn
  • 基金资助:

    山东省自然科学基金项目(Y2006C107)

Spectroscopic Study of Binding Reaction between Celastrol and Bovine Serum Albumin

ZHANG Ting1,XU Hui2,LI Gui-hua2,LIU Cheng-yin3,ZOU Ning1,ZHANG Xin2,LIU Quan-wen2,*   

  1. 1. College of Life Science, Ludong University, Yantai 264025, China;2. College of Chemistry and Materials Science, Ludong
    University, Yantai 264025, China;3. Department of Biology, The First Middle School of Qixia City, Qixia 265300, China
  • Received:2009-06-10 Online:2009-09-01 Published:2014-04-14
  • Contact: LIU Quan-wen E-mail:qwliu2001@yahoo.com.cn

摘要:

采用光谱法研究雷公藤红素(CSL)与牛血清白蛋白(BSA)的结合反应。实验表明:雷公藤红素对BSA 的荧光猝灭为静态猝灭。二者之间的作用力为疏水作用力。在溶液中二者以摩尔比1:1 结合,并求出二者的结合反应平衡常数。以华法林(Warfarin)和布洛芬(Ibuprofen)为标记物,采用竞争结合实验,利用紫外可见光谱法确定了雷公藤红素在BSA 的结合位置为Site I。根据Forster 非辐射能量转移理论,求出了给体(BSA)与受体(CSL)间距离(r0)为2.31nm。另外,利用同步荧光法考察了雷公藤红素对牛血清白蛋白构象的影响。

关键词: 雷公藤红素, 牛血清白蛋白, 结合反应, 竞争结合实验

Abstract:

Fluorescent and UV-vis spectroscopic methods were adopted to study the binding reaction of celastrol (CSL) with bovine serum albumin (BSA). The quenching of BSA by CSL was found to a static process. The primary binding pattern between celastrol and BSA was interpreted as hydrophobic interaction with the binding ratio of 1:1 under physiological conditions. It was found that celastrol was located near the Tyr residue region of site I in BSA by competitive binding experiments using warfarin and ibuprofen as site markers. The distance between the donor (BSA) and receptor (celastrol), r, was calculated to be 2.31 nm according to Frster's non-radiative energy transfer theory. In addition, the effect of celastrol on the conformation of BSA was analyzed using synchronous fluorescence spectroscopy.

Key words: celastrol, bovine serum albumin, interaction, competitive binding experiment

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