高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (1): 88.

• 研究论文 • 上一篇    下一篇

Rugulosin对N-Hsp90的抑制与结合作用

陈俊杰,易玉婷,于淼,薛少龙,熊茜茜,贺晓萌,张连茹   

  1. 厦门大学生命科学学院, 厦门 361005
  • 收稿日期:2010-03-30 修回日期:2010-09-13 出版日期:2011-01-10 发布日期:2010-12-11
  • 通讯作者: 张连茹 E-mail:ru898@126.com
  • 基金资助:

    国家自然科学基金(批准号: 30873148, 30973566, 30921005, 90913024)和国家“重大新药创制”科技重大专项(批准号: 2009ZX09103-083)资助.

Inhibitation and Binding of Rugulosin  with N-Hsp90

CHEN Jun-Jie, YI Yu-Ting, YU Miao, XUE Shao-Long, XIONG Qian-Qian, HE Xiao-Meng, ZHANG Lian-Ru*   

  1. School of Life Sciences, Xiamen University, Xiamen 361005,  China
  • Received:2010-03-30 Revised:2010-09-13 Online:2011-01-10 Published:2010-12-11
  • Contact: ZHANG Lian-Ru E-mail:ru898@126.com
  • Supported by:

    国家自然科学基金(批准号: 30873148, 30973566, 30921005, 90913024)和国家“重大新药创制”科技重大专项(批准号: 2009ZX09103-083)资助.

摘要: 经Docking模拟发现Rugulosin能与Hsp90N端的ATPase活性结构域结合,体外实验表明,其抑制Hsp90的ATPase活性的IC50为22.77μM。应用荧光,圆二色,紫外-可见吸收等光谱法及SPR技术研究Rugulosin与Hsp90N端蛋白(N-Terminal of Hsp90,NHsp90)的相互作用机制.荧光光谱实验结果表明Rugulosin对Hsp90的内源荧光具有较强的猝灭作用,其猝灭方式为静态猝灭。热力学计算得知,Rugulosin通过静电引力与NHsp90结合, 解离常数为22.4±0.17μM。圆二色光谱检测发现, Rugulosin会影响NHsp90的α-螺旋数, Rugulosin浓度的增加,NHsp90蛋白的α-螺旋减少。本研究结果表明Rugulosin可以与Hsp90结合,进而抑制其ATPase活性。Ruglulosin可能是潜在的Hsp90的抑制剂。

关键词: Rugulosin, Hsp90, 荧光光谱, 圆二色光谱, 紫外—可见吸收光谱

Abstract: By Docking simulation, We find the combination between Rugulosin and N-terminal of Hsp90 which is the ATPase activity domain. Rugulosin show a strong inhibition to ATPase activity of Hsp90 and the IC50 is 22.27μM in vitro experiment. In this study, we do a research on the interaction mechanism of Rugulosin with NHsp90 protein (N-Terminal of Hsp90)by fluorescence, circular dichroism, UV - visible absorption spectroscopy, and SPR technology. fluorescence spectra experiment results show that Rugulosin cause a strong fluorescence quenching on endogenous fluorescence of Hsp90 by static quenching method. Thermodynamic analysis signify the Binding mechanism is electrostatic forces and dissociation constant is 22.4 ± 0.17μM. Circular dichroism spectra detected the α-helix of NHsp90 reducing as the Rugulosin concentration increased, This study show that Rugulosin can make a combination with NHsp90, thereby inhibiting its ATPase activity. Ruglulosin may be a potential inhibitor of Hsp90.

Key words: Rugulosin, Hsp90, fluorescence spectroscopy, circular dichroism spectroscopy, UV-visible absorption spectra

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