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-Structure paper
タイトル | Potent neutralizing nanobodies resist convergent circulating variants of SARS-CoV-2 by targeting diverse and conserved epitopes. |
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ジャーナル・号・ページ | Nat Commun, Vol. 12, Issue 1, Page 4676, Year 2021 |
掲載日 | 2021年8月3日 |
著者 | Dapeng Sun / Zhe Sang / Yong Joon Kim / Yufei Xiang / Tomer Cohen / Anna K Belford / Alexis Huet / James F Conway / Ji Sun / Derek J Taylor / Dina Schneidman-Duhovny / Cheng Zhang / Wei Huang / Yi Shi / |
PubMed 要旨 | Interventions against variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are urgently needed. Stable and potent nanobodies (Nbs) that target the receptor binding domain (RBD) of ...Interventions against variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are urgently needed. Stable and potent nanobodies (Nbs) that target the receptor binding domain (RBD) of SARS-CoV-2 spike are promising therapeutics. However, it is unknown if Nbs broadly neutralize circulating variants. We found that RBD Nbs are highly resistant to variants of concern (VOCs). High-resolution cryoelectron microscopy determination of eight Nb-bound structures reveals multiple potent neutralizing epitopes clustered into three classes: Class I targets ACE2-binding sites and disrupts host receptor binding. Class II binds highly conserved epitopes and retains activity against VOCs and RBD. Cass III recognizes unique epitopes that are likely inaccessible to antibodies. Systematic comparisons of neutralizing antibodies and Nbs provided insights into how Nbs target the spike to achieve high-affinity and broadly neutralizing activity. Structure-function analysis of Nbs indicates a variety of antiviral mechanisms. Our study may guide the rational design of pan-coronavirus vaccines and therapeutics. |
リンク | Nat Commun / PubMed:34344900 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.18 - 7.92 Å |
構造データ | EMDB-23782, PDB-7mdw: EMDB-23788: CryoEM structure of SARS-CoV-2 RBD in complex with nanobodies Nb21 and Nb105 EMDB-23790, PDB-7mej: EMDB-23802: EMDB-24262, PDB-7n9t: |
化合物 | ChemComp-NAG: |
由来 |
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キーワード | VIRAL PROTEIN/Immune System / SARS-CoV-2 Receptor binding domain nanobody / VIRAL PROTEIN / VIRAL PROTEIN-Immune System complex / ANTIVIRAL PROTEIN/VIRAL PROTEIN / SARS-CoV-2 Spike Receptor binding domain nanobody / ANTIVIRAL PROTEIN / ANTIVIRAL PROTEIN-VIRAL PROTEIN complex |