Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (11): 2061.doi: 10.7503/cjcu20170237

• Physical Chemistry • Previous Articles     Next Articles

Molecular Docking, QSAR and Molecular Dynamics Simulation on Phosphorus Containing Pyrimidines as CDK9 Inhibitors

TANG Guanghui1, ZHANG Ya1, ZHANG Yuping1, ZHOU Pengpeng1, LIN Zhihua1, WANG Yuanqiang1,2,*()   

  1. 1. College of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, China
    2. Chongqing Key Laboratory of Medicinal Chemistry and Molecular Pharmacology, Chongqing 400054, China
  • Received:2017-04-17 Online:2017-11-10 Published:2017-10-30
  • Contact: WANG Yuanqiang E-mail:wangyqnn@cqut.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.31400667), the Scientific and Technological Research Program of Chongqing Municipal Education Commission, China(Nos.KJ1400932, KJ1500902, KJ1600908), the Chongqing Research Program of Basic Research and Frontier Technology, China(Nos.csc2014jcyjA10044, cstc2013jcyjA10019) and the Program for Innovation Team Building at Institutions of Higher Education in Chongqing, China(No.CXTDX201601031)

Abstract:

The interaction modes between phosphorus containing pyrimidine cyclin dependent kinase 9(CDK9) inhibitors and the protein were studied using the combination of molecular docking and three-dimensional quantitative structure-activity relationships(3D-QSAR). The interaction mode obtained by molecular docking revealed that the molecule conformation, hydrophobic interaction and H-bond, as well as Cys106 played an important role in the binding of phosphorus containing pyrimidines and CDK9. Based on the result of molecular docking, 3D-QSAR models were established by comparative molecular field analysis(CoMFA), comparative molecular similarity indices analysis(CoMSIA) and Topomer CoMFA techniques. With the best CoMSIA-SEH model, the cross-validated value(Q2) was 0.557, the non-cross-validated value(R2) was 0.959. The predictive power of the CoMSIA-SEH model was determined from external test sets that were excluded during model development(r2=0.863). Ten new compounds were obtained based on the above modeling, and the results of molecular docking and molecular dynamics simulation suggested they could act as potential CDK9 inhibitors, especially compound 64d with more potent inhibitory activity proved by molecular dynamics simulation and binding free energy analysis. It was expected that these results could help establish the binding mechanism between phosphorus containing pyrimidines and CDK9, and provide a valuable reference for future anti-CDK9 drug design.

Key words: Cyclin dependent kinase(CDK9) inhibitor, Surflex-dock, Comparative molecular field analysis(CoMFA), Comparative molecular similarity indices analysis(CoMSIA), Topomer CoMFA, Molecular dynamics

CLC Number: 

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