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10.1080/19420862.2021.1919285

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suck abstract from ncbi


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pmid34074219      MAbs 2021 ; 13 (1): 1919285
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  • 501Y V2 and 501Y V3 variants of SARS-CoV-2 lose binding to bamlanivimab in vitro #MMPMID34074219
  • Liu H; Wei P; Zhang Q; Chen Z; Aviszus K; Downing W; Peterson S; Reynoso L; Downey GP; Frankel SK; Kappler J; Marrack P; Zhang G
  • MAbs 2021[Jan]; 13 (1): 1919285 PMID34074219show ga
  • The newly emerging variants of SARS-CoV-2 from South Africa (B.1.351/501Y.V2) and Brazil (P.1/501Y.V3) have led to a higher infection rate and reinfection of COVID-19 patients. We found that the mutations K417N, E484K, and N501Y within the receptor-binding domains (RBDs) of the virus could confer ~2-fold higher binding affinity to the human receptor, angiotensin converting enzyme 2 (ACE2), compared to the wildtype RBD. The mutated version of RBD also completely abolishes the binding of bamlanivimab, a therapeutic antibody, in vitro. Detailed analysis shows that the ~10-fold gain of binding affinity between ACE2 and Y501-RBD, which also exits in the high contagious variant B.1.1.7/501Y.V1 from the United Kingdom, is compromised by additional introduction of the K417/N/T mutation. Mutation of E484K leads to the loss of bamlanivimab binding to RBD, although this mutation does not affect the binding between RBD and ACE2.
  • |*Mutation[MESH]
  • |Angiotensin-Converting Enzyme 2/metabolism[MESH]
  • |Antibodies, Monoclonal, Humanized/*metabolism/therapeutic use[MESH]
  • |Antiviral Agents/*metabolism/therapeutic use[MESH]
  • |Binding Sites[MESH]
  • |COVID-19 Drug Treatment[MESH]
  • |COVID-19/diagnosis/*virology[MESH]
  • |Host-Pathogen Interactions[MESH]
  • |Humans[MESH]
  • |Molecular Docking Simulation[MESH]
  • |Protein Binding[MESH]
  • |Protein Interaction Domains and Motifs[MESH]
  • |Receptors, Virus/metabolism[MESH]


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