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10.1002/jmv.26931

http://scihub22266oqcxt.onion/10.1002/jmv.26931
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33704818!8206967!33704818
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suck abstract from ncbi


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pmid33704818      J+Med+Virol 2021 ; 93 (7): 4461-4468
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  • Immunoinformatic analysis of structural and epitope variations in the spike and Orf8 proteins of SARS-CoV-2/B 1 1 7 #MMPMID33704818
  • Hussain M; Shabbir S; Amanullah A; Raza F; Imdad MJ; Zahid S
  • J Med Virol 2021[Jul]; 93 (7): 4461-4468 PMID33704818show ga
  • A newly emerged strain of SARS-CoV-2 of B.1.1.7 lineage has caused a significant surge in the SARS-CoV-2 infections in the UK. In this study, changes in the epitopes of spike and orf8 proteins in SARS-CoV-2 of B.1.1.7 lineage were investigated. Genomic alignment of the SARS-CoV-2/B.1.1.7 with SARS-CoV-2/Wuhan showed the presence of several mutations in orf1a/b, spike, orf8, and N proteins of SARS-CoV-2/B.1.1.7. Molecular models of spike and orf8 proteins were constructed by homology modeling. Superimposition between the spike proteins of SARS-CoV-2/Wuhan and SARS-CoV-2/B.1.1.7 showed noticeable variations in the spatial orientation in Val70-Asn74 and Thr250-Ser255 regions. This may have also resulted in the extension of the epitopic region at Ser244-Gly249 in the SARS-CoV-2/B.1.1.7 spike protein. Superimposition of the SARS-CoV-2/B.1.1.7 spike protein over Fab-spike protein complexes of SARS-CoV-2/Wuhan also showed subtle variations in the antibody binding affinity targeting the N-terminal domain of the spike protein. Epitopic variations were also observed between the corresponding orf8 regions of SARS-CoV-2/Wuhan and SARS-CoV-2/B.1.1.7. Moreover, the presence of a stop codon at position 27 in orf8 connotes the emergence of two frames (orf8a and orf8b) in SARS-CoV-2, which further hampers its extracellular secretion, and in turn, immunogenicity. The findings of the present study could further be used to develop targeted immunotherapeutics.
  • |Amino Acid Sequence/genetics[MESH]
  • |COVID-19/*immunology[MESH]
  • |Epitopes/immunology[MESH]
  • |Genome, Viral/genetics[MESH]
  • |Humans[MESH]
  • |Immune Evasion/immunology[MESH]
  • |Immunotherapy/methods[MESH]
  • |SARS-CoV-2/genetics/*immunology[MESH]
  • |Sequence Alignment[MESH]
  • |Spike Glycoprotein, Coronavirus/*genetics/*immunology[MESH]
  • |United Kingdom[MESH]


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