Discovery of new non-covalent and covalent inhibitors targeting SARS-CoV-2 papain-like protease and main protease

Copyright © 2023 Elsevier Inc. All rights reserved..

Global coronavirus disease 2019 (COVID-19) pandemic still threatens human health and public safety, and the development of effective antiviral agent is urgently needed. The SARS-CoV-2 main protease (Mpro) and papain-like protease (PLpro) are vital proteins in viral replication and promising therapeutic targets. Additionally, PLpro also modulates host immune response by cleaving ubiquitin and interferon-stimulated gene product 15 (ISG15) from ISGylated host proteins. In this report, we identified [1,2]selenazolo[5,4-c]pyridin-3(2H)-one and benzo[d]isothiazol-3(2H)-one as attractive scaffolds of PLpro and Mpro inhibitors. The representative compounds 6c and 7e exhibited excellent PLpro inhibition with percent inhibition of 42.9% and 44.9% at 50 nM, respectively. The preliminary enzyme kinetics experiment and fluorescent labelling experiment results determined that 6c was identified as a covalent PLpro inhibitor, while 7e was a non-covalent inhibitor. Molecular docking and dynamics simulations revealed that 6c and 7e bound to Zn-finger domain of PLpro. Compounds 6c and 7e were also identified to potent Mpro inhibitors, and they exhibited potent antiviral activities in SARS-CoV-2 infected Vero E6 cells, with EC50 value of 3.9 μM and 7.4 μM, respectively. In addition, the rat liver homogenate half-life of 6c and 7e exceeded 24 h. These findings suggest that 6c and 7e are promising led compounds for further development of PLpro/Mpro dual-target antiviral drugs.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:140

Enthalten in:

Bioorganic chemistry - 140(2023) vom: 15. Nov., Seite 106830

Sprache:

Englisch

Beteiligte Personen:

Liu, Wandong [VerfasserIn]
Wang, Juan [VerfasserIn]
Wang, Suyun [VerfasserIn]
Yue, Kairui [VerfasserIn]
Hu, Yu [VerfasserIn]
Liu, Xiaochun [VerfasserIn]
Wang, Lihao [VerfasserIn]
Wan, Shengbiao [VerfasserIn]
Xu, Ximing [VerfasserIn]

Links:

Volltext

Themen:

3C-like proteinase, SARS-CoV-2
Antiviral Agents
Coloring Agents
Coronavirus Papain-Like Proteases
Coronavirus Protease Inhibitors
Covalent inhibitor
EC 3.4.-
EC 3.4.22.-
EC 3.4.22.2
Endopeptidases
Journal Article
Mian protease
Non-covalent inhibitor
Papain-like protease
Papain-like protease, SARS-CoV-2
Peptide Hydrolases
Research Support, Non-U.S. Gov't
SARS-CoV-2

Anmerkungen:

Date Completed 18.09.2023

Date Revised 18.09.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.bioorg.2023.106830

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM361810695