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Basic Characteristics of Mutations
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Mutation Site
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E166V |
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Mutation Site Sentence
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A comparison of recent Mpro crystal structures harboring mutations in the domain II-III linker (A193P, E166V, L167F) and the Omicron signature mutation (P132H) revealed high structural variation in this region (Fig 5D). |
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Mutation Level
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Amino acid level |
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Mutation Type
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Nonsynonymous substitution |
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Gene/Protein/Region
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Mpro |
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Standardized Encoding Gene
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ORF1a
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Genotype/Subtype
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- |
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Viral Reference
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-
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Functional Impact and Mechanisms
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Disease
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Cell line
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Immune
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- |
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Target Gene
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-
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Clinical and Epidemiological Correlations
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Clinical Information
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- |
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Treatment
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- |
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Location
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- |
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Literature Information
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PMID
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39259728
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Title
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A comprehensive study of SARS-CoV-2 main protease (Mpro) inhibitor-resistant mutants selected in a VSV-based system
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Author
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Costacurta F,Dodaro A,Bante D,Schoppe H,Peng JY,Sprenger B,He X,Moghadasi SA,Egger LM,Fleischmann J,Pavan M,Bassani D,Menin S,Rauch S,Krismer L,Sauerwein A,Heberle A,Rabensteiner T,Ho J,Harris RS,Stefan E,Schneider R,Dunzendorfer-Matt T,Naschberger A,Wang D,Kaserer T,Moro S,von Laer D,Heilmann E
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Journal
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PLoS pathogens
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Journal Info
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2024 Sep 11;20(9):e1012522
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Abstract
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Nirmatrelvir was the first protease inhibitor specifically developed against the SARS-CoV-2 main protease (3CLpro/Mpro) and licensed for clinical use. As SARS-CoV-2 continues to spread, variants resistant to nirmatrelvir and other currently available treatments are likely to arise. This study aimed to identify and characterize mutations that confer resistance to nirmatrelvir. To safely generate Mpro resistance mutations, we passaged a previously developed, chimeric vesicular stomatitis virus (VSV-Mpro) with increasing, yet suboptimal concentrations of nirmatrelvir. Using Wuhan-1 and Omicron Mpro variants, we selected a large set of mutants. Some mutations are frequently present in GISAID, suggesting their relevance in SARS-CoV-2. The resistance phenotype of a subset of mutations was characterized against clinically available protease inhibitors (nirmatrelvir and ensitrelvir) with cell-based, biochemical and SARS-CoV-2 replicon assays. Moreover, we showed the putative molecular mechanism of resistance based on in silico molecular modelling. These findings have implications on the development of future generation Mpro inhibitors, will help to understand SARS-CoV-2 protease inhibitor resistance mechanisms and show the relevance of specific mutations, thereby informing treatment decisions.
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Sequence Data
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-
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