Acta Chimica Sinica ›› 2009, Vol. 67 ›› Issue (24): 2791-2797. Previous Articles     Next Articles

Special Topic

分子动力学模拟研究质子化态在HIV-1 Protease-Indinavir复合物中的作用

时术华1,扈国栋2,陈建中3,张少龙3,张庆刚3   

  1. 1. 山东师范大学,物理与电子科学学院
    2. 山东师范大学 物理与电子科学学院
    3. 山东师范大学物理与电子科学学院
  • 投稿日期:2009-03-23 修回日期:2009-06-19 发布日期:2010-02-04
  • 通讯作者: 时术华 E-mail:xzszhgd@163.com
  • 基金资助:

    国家自然科学基金(Nos. 10474060;10504017);山东省自然科学基金(No. Q2006A06)资助项目

Molecular Dynamics Simulations Study On The Role of Protonation States in HIV-1 Protease-Indinavir Complex

  • Received:2009-03-23 Revised:2009-06-19 Published:2010-02-04
  • Contact: Shu-Hua SHI E-mail:xzszhgd@163.com

The protonation state of Asp25/Asp25' in Protease-Indinavir (PR-IDV) complex is important for
HIV-1 protease to study the binding mechanism and the drug resistance induced by the mutation in theory.
The 5 ns molecular dynamic simulations have been performed for six possible protonation states, the influences
on dynamics behavior and structure caused by different protonation states analyzed, and relative binding
free energies calculated using the molecular mechanics/Possion-Boltzman surface area (MM-PBSA)
method. The results show that the protonation state of OD2 from Asp25 in chain A is the most possible. The
hydrogen bonds between the water molecule that plays a medium role and the PR-IDV complex were also
analyzed, and the results show that the different states have not obvious influences on the medium role,
which is different from our previous result on PR-BEA369 complex. It was expected that this study could
provide a significative help for the high affinity inhibitor design and the mutation induced drug resistance
research.

Key words: molecular dynamics, MM-PBSA, binding free energy, HIV-1 protease, protonation state