高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (7): 2161.doi: 10.7503/cjcu20210245

• 研究论文 • 上一篇    下一篇

PD-1与单克隆抗体残基特异性结合机制的计算丙氨酸扫描研究

温炜1, 黄达锭1, 鲍劲霄1, 张增辉1,2,3()   

  1. 1.华东师范大学化学与分子工程学院, 上海绿色化学与化工过程重点实验室, 上海分子治疗与新药开发工程研究中心, 上海 200062
    2.上海纽约大学计算化学联合研究中心, 上海 200062
    3.美国纽约大学化学系, 纽约 10003
  • 收稿日期:2021-04-12 出版日期:2021-07-10 发布日期:2021-06-22
  • 通讯作者: 张增辉 E-mail:zhzhang@phy.ecnu.edu.cn
  • 基金资助:
    国家重点研发计划项目(2016YFA0501700);国家自然科学基金重大研究计划培育项目(91753103);国家自然科学基金重点项目(21933010)

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

摘要:

通过分子动力学模拟检测了2种程序性细胞死亡蛋白(PD-1)/单克隆抗体(Pembrolizumab和Nivolumab)复合物, 并使用高效的计算丙氨酸扫描方法预测了单抗与PD-1的结合热点, 将它们与对PD-1/PD-L1结合重要的热点残基进行对比分析. 结果显示, Pembrolizumab以类似于PD-L1的方式与PD-1结合, 而Nivolumab则以不同的方式与PD-1结合. 2个PD-1/mAb复合物中共有的热点只有PD-1K131. 同时发现, 与PD-1K131结合的单抗的关键残基通常都受范德华(vdW)能量控制. 2种单克隆抗体上热点的自由能贡献都以vdW能量为主, 这表明在下一代PD-1新抗体的设计中需要提高静电型热点残基的数量.

关键词: 程序性细胞死亡蛋白, 丙氨酸扫描计算, 单克隆抗体, 分子力学广义波恩表面积, 相互作用熵

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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