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-Structure paper
| タイトル | Structural basis of broad protection against influenza virus by human antibodies targeting the neuraminidase active site via a recurring motif in CDR H3. |
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| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 7067, Year 2025 |
| 掲載日 | 2025年8月1日 |
著者 | Gyunghee Jo / Seiya Yamayoshi / Krystal M Ma / Olivia Swanson / Jonathan L Torres / James A Ferguson / Monica L Fernández-Quintero / Jiachen Huang / Jeffrey Copps / Alesandra J Rodriguez / Jon M Steichen / Yoshihiro Kawaoka / Julianna Han / Andrew B Ward / ![]() |
| PubMed 要旨 | Influenza viruses evolve rapidly, driving seasonal epidemics and posing global pandemic threats. While neuraminidase (NA) has emerged as a vaccine target, shared molecular features of NA antibody ...Influenza viruses evolve rapidly, driving seasonal epidemics and posing global pandemic threats. While neuraminidase (NA) has emerged as a vaccine target, shared molecular features of NA antibody responses are still not well understood. Here, we describe cryo-electron microscopy structures of the broadly protective human antibody DA03E17, which was previously identified from an H1N1-infected donor, in complex with NA from A/H1N1, A/H3N2, and B/Victoria-lineage viruses. DA03E17 targets the highly conserved NA active site using its long CDR H3, which features a DR (Asp-Arg) motif that engages catalytic residues and mimics sialic acid interactions. We further demonstrate that this motif is conserved among several NA active site-targeting antibodies, indicating a common receptor mimicry strategy. We also identified BCR sequences containing this DR motif across all donors in a healthy human repertoire database, suggesting that such precursors may be relatively common and have vaccine targeting potential. Our findings reveal shared molecular features in NA active site-targeting antibodies that can be harnessed to design broad, immune-focused influenza vaccines. |
リンク | Nat Commun / PubMed:40750588 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.47 - 3.2 Å |
| 構造データ | EMDB-46041, PDB-9cye: EMDB-46042, PDB-9cyf: EMDB-46043, PDB-9cyg: EMDB-46044, PDB-9cyh: EMDB-46045, PDB-9cyi: EMDB-46046, PDB-9cyj: EMDB-70108, PDB-9o4n: EMDB-70109, PDB-9o4o: EMDB-70110, PDB-9o4p: EMDB-70111, PDB-9o4q: |
| 化合物 | ![]() ChemComp-NAG: ![]() ChemComp-CA: |
| 由来 |
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キーワード | VIRAL PROTEIN/IMMUNE SYSTEM / Neuraminidase / Hydrolase / Antibody complex / VIRAL PROTEIN / VIRAL PROTEIN-IMMUNE SYSTEM complex |
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homo sapiens (ヒト)
influenza a virus (a/california/07/2009(h1n1)) (A型インフルエンザウイルス)
influenza a virus (A型インフルエンザウイルス)
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