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Structure-based design of SARS-CoV-2 papain-like protease inhibitors

Journal Article · · European Journal of Medicinal Chemistry
 [1];  [2];  [3];  [4];  [1];  [5];  [5];  [5];  [1];  [4];  [5];  [2];  [1]
  1. State Univ. of New Jersey, Piscataway, NJ (United States)
  2. Univ. of South Florida, Tampa, FL (United States)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States)
  4. Oklahoma State Univ., Stillwater, OK (United States)
  5. Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)
The COVID-19 pandemic is caused by SARS-CoV-2, an RNA virus with high transmissibility and mutation rate. Given the paucity of orally bioavailable antiviral drugs to combat SARS-CoV-2 infection, there is a critical need for additional antivirals with alternative mechanisms of action. Papain-like protease (PLpro) is one of the two SARS-CoV-2 encoded viral cysteine proteases essential for viral replication. PLpro cleaves at three sites of the viral polyproteins. In addition, PLpro antagonizes the host immune response upon viral infection by cleaving ISG15 and ubiquitin from host proteins. Therefore, PLpro is a validated antiviral drug target. In this study, we report the X-ray crystal structures of papain-like protease (PLpro) with two potent inhibitors, Jun9722 and Jun9843. Subsequently, we designed and synthesized several series of analogs to explore the structure-activity relationship, which led to the discovery of PLpro inhibitors with potent enzymatic inhibitory activity and antiviral activity against SARS-CoV-2. Together, the lead compounds are promising drug candidates for further development.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2368854
Alternate ID(s):
OSTI ID: 2229165
Journal Information:
European Journal of Medicinal Chemistry, Journal Name: European Journal of Medicinal Chemistry Vol. 264; ISSN 0223-5234
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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