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10.1016/j.celrep.2020.108185

http://scihub22266oqcxt.onion/10.1016/j.celrep.2020.108185
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suck abstract from ncbi


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pmid32941788      Cell+Rep 2020 ; 32 (12): 108185
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  • SARS-CoV-2 ORF3b Is a Potent Interferon Antagonist Whose Activity Is Increased by a Naturally Occurring Elongation Variant #MMPMID32941788
  • Konno Y; Kimura I; Uriu K; Fukushi M; Irie T; Koyanagi Y; Sauter D; Gifford RJ; Nakagawa S; Sato K
  • Cell Rep 2020[Sep]; 32 (12): 108185 PMID32941788show ga
  • One of the features distinguishing SARS-CoV-2 from its more pathogenic counterpart SARS-CoV is the presence of premature stop codons in its ORF3b gene. Here, we show that SARS-CoV-2 ORF3b is a potent interferon antagonist, suppressing the induction of type I interferon more efficiently than its SARS-CoV ortholog. Phylogenetic analyses and functional assays reveal that SARS-CoV-2-related viruses from bats and pangolins also encode truncated ORF3b gene products with strong anti-interferon activity. Furthermore, analyses of approximately 17,000 SARS-CoV-2 sequences identify a natural variant in which a longer ORF3b reading frame was reconstituted. This variant was isolated from two patients with severe disease and further increased the ability of ORF3b to suppress interferon induction. Thus, our findings not only help to explain the poor interferon response in COVID-19 patients but also describe the emergence of natural SARS-CoV-2 quasispecies with an extended ORF3b gene that may potentially affect COVID-19 pathogenesis.
  • |Adult[MESH]
  • |Amino Acid Sequence/genetics[MESH]
  • |Animals[MESH]
  • |Betacoronavirus/*genetics/immunology[MESH]
  • |COVID-19[MESH]
  • |Chiroptera/virology[MESH]
  • |Codon, Nonsense/genetics[MESH]
  • |Coronavirus Infections/pathology/*virology[MESH]
  • |Eutheria/virology[MESH]
  • |Humans[MESH]
  • |Interferon Type I/*antagonists & inhibitors[MESH]
  • |Male[MESH]
  • |Pandemics[MESH]
  • |Pneumonia, Viral/*virology[MESH]
  • |SARS-CoV-2[MESH]


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