Allosteric Inhibitors of the SARS-COV-2 Papain-like Protease Domain Induce Proteasomal Degradation of Its Parent Protein NSP3
The papain-like protease of SARS-COV-2 is essential for viral replication and pathogenesis. Its location within a much larger multifunctional protein, NSP3, makes it an ideal candidate for a targeted degradation approach capable of eliminating multiple functions with a single-molecule treatment. In this work, we have developed a HiBiT-based cellular model to study NSP3 degradation and used this platform for the discovery of monovalent NSP3 degraders. We present previously unreported degradation activity of published papain-like protease inhibitors. Follow-up exploration of structure-activity relationships and mechanism-of-action studies points to the recruitment of the ubiquitin-proteasome machinery that is solely driven by site occupancy, regardless of molecular features of the ligand. Supported by HDX data, we hypothesize that binding-induced structural changes in NSP3 trigger the recruitment of an E3 ligase and lead to proteasomal degradation.
Medienart: |
E-Artikel |
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Erscheinungsjahr: |
2024 |
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Erschienen: |
2024 |
Enthalten in: |
Zur Gesamtaufnahme - volume:19 |
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Enthalten in: |
ACS chemical biology - 19(2024), 1 vom: 19. Jan., Seite 22-36 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Cockram, Peter E [VerfasserIn] |
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Links: |
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Themen: |
Coronavirus Papain-Like Proteases |
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Anmerkungen: |
Date Completed 22.01.2024 Date Revised 22.01.2024 published: Print-Electronic Citation Status MEDLINE |
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doi: |
10.1021/acschembio.3c00312 |
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funding: |
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Förderinstitution / Projekttitel: |
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PPN (Katalog-ID): |
NLM366412329 |
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520 | |a The papain-like protease of SARS-COV-2 is essential for viral replication and pathogenesis. Its location within a much larger multifunctional protein, NSP3, makes it an ideal candidate for a targeted degradation approach capable of eliminating multiple functions with a single-molecule treatment. In this work, we have developed a HiBiT-based cellular model to study NSP3 degradation and used this platform for the discovery of monovalent NSP3 degraders. We present previously unreported degradation activity of published papain-like protease inhibitors. Follow-up exploration of structure-activity relationships and mechanism-of-action studies points to the recruitment of the ubiquitin-proteasome machinery that is solely driven by site occupancy, regardless of molecular features of the ligand. Supported by HDX data, we hypothesize that binding-induced structural changes in NSP3 trigger the recruitment of an E3 ligase and lead to proteasomal degradation | ||
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