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-Structure paper
タイトル | Computational pipeline provides mechanistic understanding of Omicron variant of concern neutralizing engineered ACE2 receptor traps. |
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ジャーナル・号・ページ | Structure, Vol. 31, Issue 3, Page 253-264.e6, Year 2023 |
掲載日 | 2023年3月2日 |
著者 | Soumya G Remesh / Gregory E Merz / Axel F Brilot / Un Seng Chio / Alexandrea N Rizo / Thomas H Pospiech / Irene Lui / Mathew T Laurie / Jeff Glasgow / Chau Q Le / Yun Zhang / Devan Diwanji / Evelyn Hernandez / Jocelyne Lopez / Hevatib Mehmood / Komal Ishwar Pawar / Sergei Pourmal / Amber M Smith / Fengbo Zhou / / Joseph DeRisi / Tanja Kortemme / Oren S Rosenberg / Anum Glasgow / Kevin K Leung / James A Wells / Kliment A Verba / |
PubMed 要旨 | The SARS-CoV-2 Omicron variant, with 15 mutations in Spike receptor-binding domain (Spike-RBD), renders virtually all clinical monoclonal antibodies against WT SARS-CoV-2 ineffective. We recently ...The SARS-CoV-2 Omicron variant, with 15 mutations in Spike receptor-binding domain (Spike-RBD), renders virtually all clinical monoclonal antibodies against WT SARS-CoV-2 ineffective. We recently engineered the SARS-CoV-2 host entry receptor, ACE2, to tightly bind WT-RBD and prevent viral entry into host cells ("receptor traps"). Here we determine cryo-EM structures of our receptor traps in complex with stabilized Spike ectodomain. We develop a multi-model pipeline combining Rosetta protein modeling software and cryo-EM to allow interface energy calculations even at limited resolution and identify interface side chains that allow for high-affinity interactions between our ACE2 receptor traps and Spike-RBD. Our structural analysis provides a mechanistic rationale for the high-affinity (0.53-4.2 nM) binding of our ACE2 receptor traps to Omicron-RBD confirmed with biolayer interferometry measurements. Finally, we show that ACE2 receptor traps potently neutralize Omicron and Delta pseudotyped viruses, providing alternative therapeutic routes to combat this evolving virus. |
リンク | Structure / PubMed:36805129 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.4 - 3.5 Å |
構造データ | EMDB-27730, PDB-8dv1: EMDB-27731, PDB-8dv2: |
化合物 | ChemComp-NAG: |
由来 |
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キーワード | VIRAL PROTEIN/ANTIVIRAL PROTEIN / SARS-CoV-2 / Spike / Receptor-binding domain / ACE2 receptor traps / ANTIVIRAL PROTEIN / VIRAL PROTEIN-ANTIVIRAL PROTEIN complex |