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-Structure paper
タイトル | Broad cross-reactivity across sarbecoviruses exhibited by a subset of COVID-19 donor-derived neutralizing antibodies. |
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ジャーナル・号・ページ | Cell Rep, Vol. 36, Issue 13, Page 109760, Year 2021 |
掲載日 | 2021年9月28日 |
著者 | Claudia A Jette / Alexander A Cohen / Priyanthi N P Gnanapragasam / Frauke Muecksch / Yu E Lee / Kathryn E Huey-Tubman / Fabian Schmidt / Theodora Hatziioannou / Paul D Bieniasz / Michel C Nussenzweig / Anthony P West / Jennifer R Keeffe / Pamela J Bjorkman / Christopher O Barnes / |
PubMed 要旨 | Many anti-severe acute respiratory syndrome coronavirus 2 (anti-SARS-CoV-2) neutralizing antibodies target the angiotensin-converting enzyme 2 (ACE2) binding site on viral spike receptor-binding ...Many anti-severe acute respiratory syndrome coronavirus 2 (anti-SARS-CoV-2) neutralizing antibodies target the angiotensin-converting enzyme 2 (ACE2) binding site on viral spike receptor-binding domains (RBDs). Potent antibodies recognize exposed variable epitopes, often rendering them ineffective against other sarbecoviruses and SARS-CoV-2 variants. Class 4 anti-RBD antibodies against a less-exposed, but more-conserved, cryptic epitope could recognize newly emergent zoonotic sarbecoviruses and variants, but they usually show only weak neutralization potencies. Here, we characterize two class 4 anti-RBD antibodies derived from coronavirus disease 2019 (COVID-19) donors that exhibit breadth and potent neutralization of zoonotic coronaviruses and SARS-CoV-2 variants. C118-RBD and C022-RBD structures reveal orientations that extend from the cryptic epitope to occlude ACE2 binding and CDRH3-RBD main-chain H-bond interactions that extend an RBD β sheet, thus reducing sensitivity to RBD side-chain changes. A C118-spike trimer structure reveals rotated RBDs that allow access to the cryptic epitope and the potential for intra-spike crosslinking to increase avidity. These studies facilitate vaccine design and illustrate potential advantages of class 4 RBD-binding antibody therapeutics. |
リンク | Cell Rep / PubMed:34534459 / PubMed Central |
手法 | EM (単粒子) / X線回折 |
解像度 | 2.7 - 4.53 Å |
構造データ | EMDB-24504, PDB-7rkv: EMDB-24505: PDB-7rks: PDB-7rku: |
化合物 | ChemComp-NAG: |
由来 |
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キーワード | VIRAL PROTEIN/IMMUNE SYSTEM / Antibody / Surface protein / Fab / coronavirus / fusion protein / binding domain / VIRAL PROTEIN / VIRAL PROTEIN-IMMUNE SYSTEM complex / SARS-CoV-2 / broadly neutralizing / virus / ANTIVIRAL PROTEIN |