2021
DOI: 10.1016/j.cell.2021.01.037
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Circulating SARS-CoV-2 spike N439K variants maintain fitness while evading antibody-mediated immunity

Abstract: Highlights d The receptor-binding motif (RBM) is a highly variable region of SARS-CoV-2 spike d RBM mutation N439K has emerged independently in multiple lineages d N439K increases spike affinity for hACE2; viral fitness and disease are unchanged d N439K confers resistance to several mAbs and escapes some polyclonal responses

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Cited by 580 publications
(621 citation statements)
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References 104 publications
(136 reference statements)
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“…Although our assays are limited to pseudotyped viruses there is an excellent correlation between pseudotyped and authentic SARS-CoV-2 neutralization assays 11 . In addition, similar results have been reported by others using vaccinee and convalescent plasmas and a variety of different pseudotype and authentic virus assays 16,30,[44][45][46][47][48] .…”
Section: Discussionsupporting
confidence: 87%
See 1 more Smart Citation
“…Although our assays are limited to pseudotyped viruses there is an excellent correlation between pseudotyped and authentic SARS-CoV-2 neutralization assays 11 . In addition, similar results have been reported by others using vaccinee and convalescent plasmas and a variety of different pseudotype and authentic virus assays 16,30,[44][45][46][47][48] .…”
Section: Discussionsupporting
confidence: 87%
“…6a, and Table 5 and 5,6 ). To examine memory B cell antibodies for binding to circulating SARS-CoV-2 variants and antibody resistant mutants we performed ELISAs using mutant RBDs 7,8,13,16,29,30 . Twenty-two (26%) of the 84 antibodies tested showed at least 5-fold decreased binding to at least one of the mutant RBDs (Extended data Fig.…”
Section: Vaccine-elicited Sars-cov-2 Rbd-specific Monoclonal Antibodiesmentioning
confidence: 99%
“…Although our assays are limited to pseudotyped viruses there is an excellent correlation between pseudotyped and authentic SARS-CoV-2 neutralization assays 10 . In addition, similar results have been reported by others using vaccinee and convalescent plasmas and a variety of different pseudotype and authentic virus assays 15,31,4549 .…”
Section: Discussionsupporting
confidence: 88%
“…6a, and Table 5 and 7,8 ). To examine memory B cell antibodies for binding to circulating SARS-CoV-2 variants and antibody resistant mutants we performed ELISAs using mutant RBDs 12,15,[28][29][30][31] . Twenty-two (26%) of the 84 antibodies tested showed at least 5-fold decreased binding to at least one of the mutant RBDs (Extended data Fig.…”
Section: Vaccine-elicited Sars-cov-2 Rbd-specific Monoclonal Antibodiesmentioning
confidence: 99%
“…Additional S variants such as N439K and S477N also rapidly increased in frequency in Europe over the summer and into the fall of 2020. Although S477N reportedly increases affinity for the entry receptor, ACE2 (Zahradník et al, 2021), and both mutations may impact antibody neutralization to some degree (Starr et al, 2020;Liu et al, 2021;Thomson et al, 2021), neither shows any signature of increased transmissibility over the S: D614G background from which they emerged, and neither have become prominent in the United States. Therefore, SARS-CoV-2 variants can emerge and increase greatly in number over time in the absence of any clear or sustained selective advantage.…”
Section: Caveatsmentioning
confidence: 97%