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-Structure paper
タイトル | Selection, biophysical and structural analysis of synthetic nanobodies that effectively neutralize SARS-CoV-2. |
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ジャーナル・号・ページ | Nat Commun, Vol. 11, Issue 1, Page 5588, Year 2020 |
掲載日 | 2020年11月4日 |
著者 | Tânia F Custódio / Hrishikesh Das / Daniel J Sheward / Leo Hanke / Samuel Pazicky / Joanna Pieprzyk / Michèle Sorgenfrei / Martin A Schroer / Andrey Yu Gruzinov / Cy M Jeffries / Melissa A Graewert / Dmitri I Svergun / Nikolay Dobrev / Kim Remans / Markus A Seeger / Gerald M McInerney / Ben Murrell / B Martin Hällberg / Christian Löw / |
PubMed 要旨 | The coronavirus SARS-CoV-2 is the cause of the ongoing COVID-19 pandemic. Therapeutic neutralizing antibodies constitute a key short-to-medium term approach to tackle COVID-19. However, traditional ...The coronavirus SARS-CoV-2 is the cause of the ongoing COVID-19 pandemic. Therapeutic neutralizing antibodies constitute a key short-to-medium term approach to tackle COVID-19. However, traditional antibody production is hampered by long development times and costly production. Here, we report the rapid isolation and characterization of nanobodies from a synthetic library, known as sybodies (Sb), that target the receptor-binding domain (RBD) of the SARS-CoV-2 spike protein. Several binders with low nanomolar affinities and efficient neutralization activity were identified of which Sb23 displayed high affinity and neutralized pseudovirus with an IC of 0.6 µg/ml. A cryo-EM structure of the spike bound to Sb23 showed that Sb23 binds competitively in the ACE2 binding site. Furthermore, the cryo-EM reconstruction revealed an unusual conformation of the spike where two RBDs are in the 'up' ACE2-binding conformation. The combined approach represents an alternative, fast workflow to select binders with neutralizing activity against newly emerging viruses. |
リンク | Nat Commun / PubMed:33149112 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.94 - 3.06 Å |
構造データ | EMDB-11616, PDB-7a25: EMDB-11617, PDB-7a29: |
化合物 | ChemComp-NAG: |
由来 |
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キーワード | VIRAL PROTEIN / SARS-CoV-2 / complex / nanobody / spike |