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10.1016/j.immuni.2020.10.023

http://scihub22266oqcxt.onion/10.1016/j.immuni.2020.10.023
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33242394!7687367!33242394
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suck abstract from ncbi


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pmid33242394      Immunity 2020 ; 53 (6): 1272-1280.e5
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  • Cross-Neutralization of a SARS-CoV-2 Antibody to a Functionally Conserved Site Is Mediated by Avidity #MMPMID33242394
  • Liu H; Wu NC; Yuan M; Bangaru S; Torres JL; Caniels TG; van Schooten J; Zhu X; Lee CD; Brouwer PJM; van Gils MJ; Sanders RW; Ward AB; Wilson IA
  • Immunity 2020[Dec]; 53 (6): 1272-1280.e5 PMID33242394show ga
  • Most antibodies isolated from individuals with coronavirus disease 2019 (COVID-19) are specific to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). However, COVA1-16 is a relatively rare antibody that also cross-neutralizes SARS-CoV. Here, we determined a crystal structure of the COVA1-16 antibody fragment (Fab) with the SARS-CoV-2 receptor-binding domain (RBD) and negative-stain electron microscopy reconstructions with the spike glycoprotein trimer to elucidate the structural basis of its cross-reactivity. COVA1-16 binds a highly conserved epitope on the SARS-CoV-2 RBD, mainly through a long complementarity-determining region (CDR) H3, and competes with the angiotensin-converting enzyme 2 (ACE2) receptor because of steric hindrance rather than epitope overlap. COVA1-16 binds to a flexible up conformation of the RBD on the spike and relies on antibody avidity for neutralization. These findings, along with the structural and functional rationale for epitope conservation, provide insights for development of more universal SARS-like coronavirus vaccines and therapies.
  • |Angiotensin-Converting Enzyme 2/*metabolism[MESH]
  • |Antibodies, Viral/genetics/*metabolism[MESH]
  • |Broadly Neutralizing Antibodies/genetics/metabolism[MESH]
  • |COVID-19 Vaccines/*immunology[MESH]
  • |COVID-19/*immunology[MESH]
  • |Conserved Sequence/genetics[MESH]
  • |Cross Reactions[MESH]
  • |Crystallization[MESH]
  • |Epitope Mapping[MESH]
  • |Epitopes, B-Lymphocyte/genetics/metabolism[MESH]
  • |Humans[MESH]
  • |Immunoglobulin Fab Fragments/genetics/metabolism[MESH]
  • |Protein Binding[MESH]
  • |Protein Conformation[MESH]
  • |Protein Interaction Domains and Motifs/genetics[MESH]
  • |SARS-CoV-2/*immunology[MESH]


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