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10.1371/journal.pone.0253089

http://scihub22266oqcxt.onion/10.1371/journal.pone.0253089
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34166398!8224853!34166398
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suck abstract from ncbi


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pmid34166398      PLoS+One 2021 ; 16 (6): e0253089
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  • SARS-CoV-2 viral proteins NSP1 and NSP13 inhibit interferon activation through distinct mechanisms #MMPMID34166398
  • Vazquez C; Swanson SE; Negatu SG; Dittmar M; Miller J; Ramage HR; Cherry S; Jurado KA
  • PLoS One 2021[]; 16 (6): e0253089 PMID34166398show ga
  • Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused a devastating global pandemic, infecting over 43 million people and claiming over 1 million lives, with these numbers increasing daily. Therefore, there is urgent need to understand the molecular mechanisms governing SARS-CoV-2 pathogenesis, immune evasion, and disease progression. Here, we show that SARS-CoV-2 can block IRF3 and NF-kappaB activation early during virus infection. We also identify that the SARS-CoV-2 viral proteins NSP1 and NSP13 can block interferon activation via distinct mechanisms. NSP1 antagonizes interferon signaling by suppressing host mRNA translation, while NSP13 downregulates interferon and NF-kappaB promoter signaling by limiting TBK1 and IRF3 activation, as phospho-TBK1 and phospho-IRF3 protein levels are reduced with increasing levels of NSP13 protein expression. NSP13 can also reduce NF-kappaB activation by both limiting NF-kappaB phosphorylation and nuclear translocation. Last, we also show that NSP13 binds to TBK1 and downregulates IFIT1 protein expression. Collectively, these data illustrate that SARS-CoV-2 bypasses multiple innate immune activation pathways through distinct mechanisms.
  • |Active Transport, Cell Nucleus/genetics/immunology[MESH]
  • |Adaptor Proteins, Signal Transducing/genetics/*immunology[MESH]
  • |COVID-19/genetics/*immunology[MESH]
  • |Cell Nucleus/genetics/*immunology[MESH]
  • |HeLa Cells[MESH]
  • |Humans[MESH]
  • |Interferon Regulatory Factor-3/genetics/*immunology[MESH]
  • |NF-kappa B/genetics/immunology[MESH]
  • |Phosphorylation/genetics/immunology[MESH]
  • |Protein Serine-Threonine Kinases/genetics/immunology[MESH]
  • |RNA-Binding Proteins/genetics/*immunology[MESH]
  • |SARS-CoV-2/genetics/*immunology[MESH]
  • |Signal Transduction/genetics/*immunology[MESH]


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