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荧光光谱法研究3-吡唑啉基叶绿素-a衍生物和牛血清白蛋白的相互作用
引用本文:刘淑燕,刘春林,刘永明,王进军,刘振波.荧光光谱法研究3-吡唑啉基叶绿素-a衍生物和牛血清白蛋白的相互作用[J].烟台大学学报(自然科学与工程版),2008,21(1):29-34.
作者姓名:刘淑燕  刘春林  刘永明  王进军  刘振波
作者单位:刘淑燕(烟台大学,药学院,山东,烟台,264005);刘春林(烟台大学,药学院,山东,烟台,264005);刘永明(烟台大学,化学生物理工学院,山东,烟台,264005);王进军(烟台大学,化学生物理工学院,山东,烟台,264005);刘振波(烟台大学,化学生物理工学院,山东,烟台,264005)
基金项目:山东省教育厅资助项目(200391006008).
摘    要:用荧光光谱法、同步荧光光谱、紫外-可见分光光度法研究3-吡唑啉卟吩f-2甲酯(Mf2-5)、3-吡唑啉卟吩f-3甲酯(Mf3-5)与牛血清白蛋白(BSA)的相互结合反应.实验表明Mf2—5、Mf3—5与牛血清白蛋白的相互结合作用为静态猝灭过程,在溶液中二者以物质的量之比1:1牢固结合,25℃时其结合反应的平衡常数分别为:KMf2-5=6.14×10^5L·mol^-1,KMf3—5=1.02×10^5L·mol^-1.根据Ft~rster非辐射能量转移机理,求算了给体(BSA)与受体(Mt2-5、Mf3-5)间距离r和能量转移效率E分别为:rMf2-5=4.48nm,rMf3-5=4.86nm,EMf2-5:0.24,EMf3—5=0.20.并推测了二者之间的主要作用力为疏水作用力.

关 键 词:牛血清白蛋白  荧光猝灭  结合反应
文章编号:1004-8820(2008)01-0029-06
收稿时间:2007-07-01
修稿时间:2007年7月1日

Study on Interaction Between 3-Pyrrolinyl Chlorophyll-a Derivatives and Bovine Serum Albumins by Fluorescence
Institution:LIU Shu-yan, LIU Chun-lin, LIU Yong-ming, WANG Jin-jun, LIU Zhen-bo ( 1. School of Pharmacy, Yantai University , Yantai 264005, China; 2. Chemistry and Biology College, Yantai University, Yan- tai 264005, China)
Abstract:The binding reaction between 3-pyrrolinyl chlorophyll-a derivatives (Mf2-5 ,Mt3-5 ) and bovine serum albumins (BSA) is studied by fluorescence spectra, synchronous fluorescence spectra, and UV-Vis absorption spectra. The research results indicate that the combination reaction of them is a single static quenching process, and Mr2-5 or Mf3-5 strongly bounds BSA with the molar ratio of 1 : 1 and the binding equilibrium constant Ko at 25 ℃ is KMf2-5 =6.14 ×10^5L·mol^-1, KMf3-5 = 1.02×10^5L·mol^-1. The shortest binding distance r and the energy transfer efficiencies E between donor BSA and acceptor of Mf2-5 or Mf3-5 are obtained by Forster nonradiative energy transfer mechanism as follows: rMf-5 =4. 48 nm, rMf3-5 = 4. 86 nm, EMf2-5 =0.24 ,EMf3-5 =0.20. The main sort of binding force between them is speculated about to be hydro
phobic force.
Keywords:bovine serum albumins  fluorescence quenching  binding reaction
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