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-Structure paper
タイトル | A cocktail of protective antibodies subverts the dense glycan shield of Lassa virus. |
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ジャーナル・号・ページ | Sci Transl Med, Vol. 14, Issue 668, Page eabq0991, Year 2022 |
掲載日 | 2022年10月26日 |
著者 | Haoyang Li / Tierra Buck / Michelle Zandonatti / Jieyun Yin / Alex Moon-Walker / Jingru Fang / Anatoliy Koval / Megan L Heinrich / Megan M Rowland / Ruben Diaz Avalos / Sharon L Schendel / Diptiben Parekh / Dawid Zyla / Adrian Enriquez / Stephanie Harkins / Brian Sullivan / Victoria Smith / Onyeka Chukwudozie / Reika Watanabe / James E Robinson / Robert F Garry / Luis M Branco / Kathryn M Hastie / Erica Ollmann Saphire / |
PubMed 要旨 | Developing potent therapeutics and effective vaccines are the ultimate goals in controlling infectious diseases. Lassa virus (LASV), the causative pathogen of Lassa fever (LF), infects hundreds of ...Developing potent therapeutics and effective vaccines are the ultimate goals in controlling infectious diseases. Lassa virus (LASV), the causative pathogen of Lassa fever (LF), infects hundreds of thousands annually, but effective antivirals or vaccines against LASV infection are still lacking. Furthermore, neutralizing antibodies against LASV are rare. Here, we describe biochemical analyses and high-resolution cryo-electron microscopy structures of a therapeutic cocktail of three broadly protective antibodies that target the LASV glycoprotein complex (GPC), previously identified from survivors of multiple LASV infections. Structural and mechanistic analyses reveal compatible neutralizing epitopes and complementary neutralization mechanisms that offer high potency, broad range, and resistance to escape. These antibodies either circumvent or exploit specific glycans comprising the extensive glycan shield of GPC. Further, they require mammalian glycosylation, native GPC cleavage, and proper GPC trimerization. These findings guided engineering of a next-generation GPC antigen suitable for future neutralizing antibody and vaccine discovery. Together, these results explain protective mechanisms of rare, broad, and potent antibodies and identify a strategy for the rational design of therapeutic modalities against LF and related infectious diseases. |
リンク | Sci Transl Med / PubMed:36288283 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.75 - 2.77 Å |
構造データ | EMDB-26653, PDB-7uot: EMDB-26655, PDB-7uov: |
化合物 | ChemComp-NAG: |
由来 |
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キーワード | VIRAL PROTEIN/IMMUNE SYSTEM / Lassa virus / Neutralizing antibody / N-linked glycans complex / VIRAL PROTEIN / VIRAL PROTEIN-IMMUNE SYSTEM complex |