Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (7): 2161.doi: 10.7503/cjcu20210245

• Article • Previous Articles     Next Articles

Residue Specific Binding Mechanisms of PD-1 to Its Monoclonal Antibodies by Computational Alanine Scanning

WEN Wei1, HUANG Dading1, BAO Jingxiao1, ZHANG John Z. H.1,2,3()   

  1. 1.Shanghai Engineering Research Center of Molecular Therapeutics & New Drug Development,Shanghai Key Laboratory of Green Chemistry & Chemical Process,School of Chemistry and Molecular Engineering,East China Normal University,Shanghai 200062,China
    2.NYU?ECNU Center for Computational Chemistry at NYU Shanghai,Shanghai 200062,China
    3.Department of Chemistry,New York University,NY 10003,USA
  • Received:2021-04-12 Online:2021-07-10 Published:2021-06-22
  • Contact: ZHANG John Z. H. E-mail:zhzhang@phy.ecnu.edu.cn

Abstract:

Molecular dynamics simulations were conducted on two PD-1/monoclonal antibody(pembrolizu-mab, nivolumab) complexes separately. The binding hotspots of the monoclonal antibody(mAb) and PD-1 were predicted by using efficient computational alanine scanning method. The comparation between the predicted hotspots and the important residues in PD-1/PD-L1 complex shows that pembrolizumab combines with PD-1 in a way similar to PD-L1, while nivolumab combines with PD-1 in a more different way by N-loop. PD-1K131 is the only hotspot shared by the two PD-1/mAb complexes. It is also found that key residues of mAbs binding to D-1K131 are similarly dominated by van der Waals(vdW) energy. Furthermore, hotspots on both the monoclonal antibodies are dominated by vdW energy, indicating a demand to improve the contributions of electrostatic energy. The present work provides important insights for the design of new mAbs targeting PD-1.

Key words: PD-1, Computational alanine scanning, Monoclonal antibodies, MM/GBSA, Interaction entropy

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