Chemical Research in Chinese Universities ›› 2024, Vol. 40 ›› Issue (6): 1298-1310.doi: 10.1007/s40242-024-4150-1

• Articles • Previous Articles    

In silico Exploration of Inhibition Mechanism of Lianhua Qingwen Formula (LQF) Interaction on SARS-CoV-2 Mpro

XUE Xiaolong1, WANG Xin1, YE Chenghao1, GAO Meina2,3, LI Peng1, YU Kunqian3, CHEN Guanghui1   

  1. 1. Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou 515063, P. R. China;
    2. School of Chinese Materia Media, Nanjing University of Chinese Medicine, Nanjing 210029, P. R. China;
    3. State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China
  • Received:2024-06-27 Online:2024-12-01 Published:2024-10-26
  • Contact: CHEN Guanghui,ghchen@stu.edu.cn E-mail:ghchen@stu.edu.cn
  • Supported by:
    This work was supported by the National Key R & D Program of China (No. 2023YFC2604404), the Science and Technology Plan Project of Shantou City, China (No. 2020-7) and the 2020 Li Ka Shing Foundation Cross-Disciplinary Research Grant (No. 2020LKSFG07B).

Abstract: It is well known that the severe epidemic respiratory disease COVID-19 was caused by the novel coronavirus SARS-CoV-2. Lianhua Qingwen Formula (LQF), as a traditional Chinese medicine (TCM) formula, exerts anti-coronavirus activity by suppressing viral replication and activating anti-inflammatory effects. In this work, the unknown molecular inhibition mechanism of LQF ingredients on the main protease (Mpro) of SARS-CoV-2 was investigated. From the screening of pharmacophore model, docking, molecular dynamics (MD) simulations and molecular mechanics Poisson-Boltzmann surface area (MM/PBSA) calculations, it is found that Isoliquiritin apioside, Liquiritin apioside, Forsythoside E, Rutin, and Isoliquiritin possess much larger binding free energies than reference X77. These five hit molecules are characterized by multi-hydroxyl groups, which facilitate the formation of hydrogen bonds with polar amino acid residues at S1' subsite and rationalize their primary binding to Mpro with electrostatic rather than usual van der Waals (vdW) interaction. In addition, the Isoliquiritin apioside, Liquiritin apioside, and Rutin were also identified as potential inhibitors on SARS-CoV Mpro, possessing much larger binding free energies with large electrostatic interaction than that of reference ENB. The present study can not only enrich the scaffolds of Mpro of SARS-CoV family inhibitors, but also provide an idea for the new drug development.

Key words: SARS-CoV-2 Mpro inhibitor, Lianhua Qingwen Formula (LQF), Virtual screening, S1′ subsite, SARS-CoV Mpro inhibitor