| Autor: |
Liu, Chang, Zhou, Daming, Nutalai, Rungtiwa, Duyvesteyn, Helen M.E., Tuekprakhon, Aekkachai, Ginn, Helen M., Dejnirattisai, Wanwisa, Supasa, Piyada, Mentzer, Alexander J., Wang, Beibei, Case, James Brett, Zhao, Yuguang, Skelly, Donal T., Chen, Rita E., Johnson, Sile Ann, Ritter, Thomas G., Mason, Chris, Malik, Tariq, Temperton, Nigel, Paterson, Neil G. |
| Zdroj: |
Cell Host & Microbe; Jan2022, Vol. 30 Issue 1, p53-53, 1p |
| Abstrakt: |
Alpha-B.1.1.7, Beta-B.1.351, Gamma-P.1, and Delta-B.1.617.2 variants of SARS-CoV-2 express multiple mutations in the spike protein (S). These may alter the antigenic structure of S, causing escape from natural or vaccine-induced immunity. Beta is particularly difficult to neutralize using serum induced by early pandemic SARS-CoV-2 strains and is most antigenically separated from Delta. To understand this, we generated 674 mAbs from Beta-infected individuals and performed a detailed structure-function analysis of the 27 most potent mAbs: one binding the spike N-terminal domain (NTD), the rest the receptor-binding domain (RBD). Two of these RBD-binding mAbs recognize a neutralizing epitope conserved between SARS-CoV-1 and -2, while 18 target mutated residues in Beta: K417N, E484K, and N501Y. There is a major response to N501Y, including a public IgVH4-39 sequence, with E484K and K417N also targeted. Recognition of these key residues underscores why serum from Beta cases poorly neutralizes early pandemic and Delta viruses. [Display omitted] • Generated 674 antibodies from patients infected with SARS-CoV-2 Beta variant • 18 of 27 most potent mAbs target the 3 mutations in Beta RBD • A major response to N501Y includes a public IgVH4-39 sequence • Two antibodies recognize a neutralizing epitope conserved between SARS-CoV-1 and -2 Liu et al. generated 674 antibodies from patients infected with the SARS-CoV-2 Beta variant. 18 out of 27 most potent neutralizing antibodies isolated target the 3 mutations present in the receptor-binding domain of this variant. This underscores the poor neutralization by Beta serum of early pandemic and Delta viruses. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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