Study on Interaction between 24(R)-Pseudo Sapogenin DQ and Bovine Serum Albumin by Fluorescence Spectrometry
摘 要
采用荧光光谱法对24(R)-拟人参皂苷元DQ[24(R)-PDQ]与牛血清蛋白(BSA)的相互作用及机制进行了研究,并利用取代试验确定了24(R)-PDQ在BSA上的结合位点。结果表明:24(R)-PDQ与BSA在298,303,310 K下的结合常数分别为2.076×103,1.587×103,1.303×103L·mol-1;24(R)-PDQ对BSA的荧光猝灭类型为静态猝灭,主要作用力是氢键和范德华力;结合位点数近似为1,24(R)-PDQ与BSA的结合位点在BSA的SiteⅠ上。
Abstract
The interaction and mechanism between bovine serum albumin (BSA) and 24(R)-pseudo sapogenin DQ[24(R)-PDQ] were studied by fluorescence spectrometry, and the binding site was confirmed by displacement experiment. The results showed the binding constants were calculated to be 2.076×103L·mol-1 at 298 K, 1.587×103L·mol-1 at 303 K and 1.303×103L·mol-1 at 310 K respectively, and 24(R)-PDQ induced the intrinsic fluorescence quenching of BSA through a static quenching procedure. The predominant forces in the 24(R)-PDQ-BSA complex were hydrogen binding and Van der waals force. The number of binding sites in this binary system was approximately 1. The specific binding of 24(R)-PDQ in the vicinity of Site Ι of BSA was clarified.
中图分类号 O657.31 DOI 10.11973/lhjy-hx201807008
所属栏目 工作简报
基金项目 山西省1331工程重点学科建设计划项目(2017);忻州师范学院博士科研启动项目(2016);忻州师范学院基金项目(201714)
收稿日期 2017/7/3
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备注杨洁,博士,讲师,研究方向为天然产物化学,545431607@qq.com
引用该论文: YANG Jie,FAN Xiaoli,LIN Jiali,CAO Xurong,ZHAO Erlao. Study on Interaction between 24(R)-Pseudo Sapogenin DQ and Bovine Serum Albumin by Fluorescence Spectrometry[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2018, 54(7): 783~787
杨洁,范晓丽,林佳丽,曹旭蓉,赵二劳. 荧光光谱法研究24(R)-拟人参皂苷元DQ与牛血清白蛋白的相互作用[J]. 理化检验-化学分册, 2018, 54(7): 783~787
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【6】杨洁.奥克梯隆型人参皂苷的半合成及生物活性研究[D].长春:吉林大学, 2016.
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【10】张庆贺.抗心律失常1.1类新药PDD1的质量标准研究以及稳定性考察[D].长春:吉林大学, 2013.
【11】XU H L, YAO N N, XU H R, et al. Characterization of the interaction between eupatorin and bovine serum albumin by spectroscopic and molecular modeling methods [J]. International Journal of Molecular Sciences, 2013,14(7):14185-14203.
【12】岳保旺,张晓,陈静超,等.红藤活性组分与牛血清白蛋白作用的光谱分析[J].计算机与应用化学, 2013,30(12):1189-1192.
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【15】徐岩,沈含熙,黄汉国.利用标记药物布洛芬及保泰松研究萘啶酸与血清白蛋白的结合作用[J].高等学校化学学报, 1996,17(12):1855-1858.
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