XXV General Assembly and Congress of the
International Union of Crystallography - IUCr 2021
August 14 - 22, 2021 | Prague, Czech Republic
Conference Agenda
Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
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Session Overview |
Session | ||
KN-25: A Crystallographic Snapshot of SARS-CoV-2 Main Protease Maturation Process and the Discovery of Inhibitors
Glaucius Oliva | ||
Presentations | ||
A Crystallographic Snapshot of SARS-CoV-2 Main Protease Maturation Process 1Institute of Physics of Sao Carlos, University of Sao Paulo, Brazil; 2BioMAX, MAX IV Laboratory, Lund, Sweden; 3Brazilian Synchrotron Light Laboratory (LNLS), Campinas, Brazil SARS-CoV-2 is the causative agent of COVID-19. The dimeric form of the viral Mpro is responsible for the cleavage of the viral polyprotein in 11 sites, including its own N and C- terminus. The lack of structural information for intermediary forms of Mpro is a setback for the understanding of this process. Herein, we used X-ray crystallography to characterize an immature form of the main protease, which revealed major conformational changes in the positioning of domain-three over the active site, hampering the dimerization and diminishing its activity. We propose that this form preludes the cis-cleavage of N-terminal residues. Using fragment screening, we probe new cavities in this form which can be used to guide therapeutic development. Furthermore, we characterized a serine site-directed mutant of the Mpro bound to its endogenous N and C-terminal residues during the formation of the tetramer. We suggest this form is a transitional state during the C-terminal trans-cleavage. This data sheds light in the structural modifications of the SARS-CoV-2 main protease during maturation, which can guide the development of new inhibitors. External Resource: https://www.xray.cz/iucrv/vidp.asp?id=48
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