7FAY image
Entry Detail
PDB ID:
7FAY
Keywords:
Title:
Crystal structure of SARS-CoV-2 main protease in complex with (R)-1a
Biological Source:
PDB Version:
Deposition Date:
2021-07-08
Release Date:
2021-07-21
Method Details:
Experimental Method:
Resolution:
2.10 Å
R-Value Free:
0.23
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:3C-like proteinase
Chain IDs:A
Chain Length:306
Number of Molecules:1
Biological Source:Severe acute respiratory syndrome coronavirus 2
Ligand Molecules
Primary Citation
An orally available M pro inhibitor is effective against wild-type SARS-CoV-2 and variants including Omicron.
Nat Microbiol 7 716 725 (2022)
PMID: 35477751 DOI: 10.1038/s41564-022-01119-7

Abstact

Emerging SARS-CoV-2 variants continue to cause waves of new infections globally. Developing effective antivirals against SARS-CoV-2 and its variants is an urgent task. The main protease (Mpro) of SARS-CoV-2 is an attractive drug target because of its central role in viral replication and its conservation among variants. We herein report a series of potent α-ketoamide-containing Mpro inhibitors obtained using the Ugi four-component reaction. The prioritized compound, Y180, showed an IC50 of 8.1 nM against SARS-CoV-2 Mpro and had oral bioavailability of 92.9%, 31.9% and 85.7% in mice, rats and dogs, respectively. Y180 protected against wild-type SARS-CoV-2, B.1.1.7 (Alpha), B.1.617.1 (Kappa) and P.3 (Theta), with EC50 of 11.4, 20.3, 34.4 and 23.7 nM, respectively. Oral treatment with Y180 displayed a remarkable antiviral potency and substantially ameliorated the virus-induced tissue damage in both nasal turbinate and lung of B.1.1.7-infected K18-human ACE2 (K18-hACE2) transgenic mice. Therapeutic treatment with Y180 improved the survival of mice from 0 to 44.4% (P = 0.0086) upon B.1.617.1 infection in the lethal infection model. Importantly, Y180 was also highly effective against the B.1.1.529 (Omicron) variant both in vitro and in vivo. Overall, our study provides a promising lead compound for oral drug development against SARS-CoV-2.

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