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-Structure paper
タイトル | A human monoclonal antibody binds within the poliovirus receptor-binding site to neutralize all three serotypes. |
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ジャーナル・号・ページ | Nat Commun, Vol. 14, Issue 1, Page 6335, Year 2023 |
掲載日 | 2023年10月10日 |
著者 | Andrew J Charnesky / Julia E Faust / Hyunwook Lee / Rama Devudu Puligedda / Daniel J Goetschius / Nadia M DiNunno / Vaskar Thapa / Carol M Bator / Sung Hyun Joseph Cho / Rahnuma Wahid / Kutub Mahmood / Scott Dessain / Konstantin M Chumakov / Amy Rosenfeld / Susan L Hafenstein / |
PubMed 要旨 | Global eradication of poliovirus remains elusive, and it is critical to develop next generation vaccines and antivirals. In support of this goal, we map the epitope of human monoclonal antibody 9H2 ...Global eradication of poliovirus remains elusive, and it is critical to develop next generation vaccines and antivirals. In support of this goal, we map the epitope of human monoclonal antibody 9H2 which is able to neutralize the three serotypes of poliovirus. Using cryo-EM we solve the near-atomic structures of 9H2 fragments (Fab) bound to capsids of poliovirus serotypes 1, 2, and 3. The Fab-virus complexes show that Fab interacts with the same binding mode for each serotype and at the same angle of interaction relative to the capsid surface. For each of the Fab-virus complexes, we find that the binding site overlaps with the poliovirus receptor (PVR) binding site and maps across and into a depression in the capsid called the canyon. No conformational changes to the capsid are induced by Fab binding for any complex. Competition binding experiments between 9H2 and PVR reveal that 9H2 impedes receptor binding. Thus, 9H2 outcompetes the receptor to neutralize poliovirus. The ability to neutralize all three serotypes, coupled with the critical importance of the conserved receptor binding site make 9H2 an attractive antiviral candidate for future development. |
リンク | Nat Commun / PubMed:37816742 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.5 - 3.15 Å |
構造データ | EMDB-27943, PDB-8e8l: EMDB-27947, PDB-8e8r: EMDB-27948, PDB-8e8s: EMDB-27949, PDB-8e8x: EMDB-27950, PDB-8e8y: EMDB-27951, PDB-8e8z: |
化合物 | ChemComp-PLM: |
由来 |
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キーワード | VIRUS/IMMUNE SYSTEM / Complex / Fab / poliovirus / neutralizing / VIRUS-IMMUNE SYSTEM complex |