Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (17): 2026-2030. Previous Articles     Next Articles

Full Papers

雪卡毒素毒性机理的分子对接及分子动力学研究

郑杰1,赵斌1,闫鸿鹏1,张焜1,张大鹏2,赵肃清*,1   

  1. (1广东工业大学轻工化工学院 广州 510006)
    (2广州医学院 广州 510182)
  • 投稿日期:2010-12-17 修回日期:2011-04-18 发布日期:2011-05-17
  • 通讯作者: 赵肃清 E-mail:suqingzhao@yahoo.com.cn
  • 基金资助:

    国家自然科学基金;广东省自然科学基金

Molecular Docking and Molecular Dynamics Simulation Studies of Toxicity Mechanism of Ciguatoxin

Zheng Jie1 Zhao Bin1 Yan Hongpeng1 Zhang Kun1 Zhang Dapeng2 Zhao Suqing*,1   

  1. (1 Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006)
    (2 Guangzhou Medical University, Guangzhou 510182)
  • Received:2010-12-17 Revised:2011-04-18 Published:2011-05-17
  • Contact: Su-Qing ZHAO E-mail:suqingzhao@yahoo.com.cn

Binding modes between CTX (Ciguatoxin) and sodium channel, which is one of the targets about CTX toxic effects, were simulated through molecular docking and dynamics method, compared with Quinidine. The docking results indicated that CTX and Quinidine shared different binding modes to sodium channel. The ligand-receptor complexes obtained by molecular docking are stable during 2.5 ns molecular dynamics simulation. Quinidine is tightly held to sodium channel centeral residues of GLU1784 and THR1858 with one hydrogen bond respectively. Its pyridine ring has hydrophobic interactions with residue of PHE1791, which produces the effect of sodium channel block. The binding site of CTX is far away from sodium channel center, one stable hydrogen bond interaction has been formed with residues of SER1782, GLU1784, LEU1786 and GLU1788 respectively. It may promote sodium channel opening and activate sodium channel, and produce its toxic effects.

Key words: molecular docking, molecular dynamics, ciguatoxin, sodium channel protein, mechanism of toxicity