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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 9do2 | |||||||||||||||||||||
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| タイトル | #1664 Fab in complex with NG2 COBRA hemagglutinin | |||||||||||||||||||||
要素 |
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キーワード | VIRAL PROTEIN/Immune System / Hemagglutinin / COBRA / antibody / Fab / VIRAL PROTEIN / VIRAL PROTEIN-Immune System complex | |||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報viral budding from plasma membrane / clathrin-dependent endocytosis of virus by host cell / host cell surface receptor binding / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / host cell plasma membrane / virion membrane / membrane 類似検索 - 分子機能 | |||||||||||||||||||||
| 生物種 | Homo sapiens (ヒト)![]() Influenza A virus (A型インフルエンザウイルス) | |||||||||||||||||||||
| 手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.45 Å | |||||||||||||||||||||
データ登録者 | Nagashima, K. / Mousa, J. | |||||||||||||||||||||
| 資金援助 | 米国, 1件
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引用 | ジャーナル: J Virol / 年: 2025タイトル: Assessing the structural boundaries of broadly reactive antibody interactions with diverse H3 influenza hemagglutinin proteins. 著者: John V Dzimianski / Kaito A Nagashima / Joseph M Cruz / Giuseppe A Sautto / Sara M O'Rourke / Vitor H B Serrão / Ted M Ross / Jarrod J Mousa / Rebecca M DuBois / ![]() 要旨: Influenza virus infections are an ongoing seasonal disease burden and a persistent pandemic threat. Formulating successful vaccines remains a challenge due to accumulating mutations in circulating ...Influenza virus infections are an ongoing seasonal disease burden and a persistent pandemic threat. Formulating successful vaccines remains a challenge due to accumulating mutations in circulating strains, necessitating the development of innovative strategies to combat present and future viruses. One promising strategy for attaining greater vaccine effectiveness and longer-lasting protection is the use of computationally optimized broadly reactive antigens (COBRAs). The COBRA approach involves antigen design by generating iterative, layered consensus sequences based on current and historic viruses. Antigens designed by this process show a greater breadth of antibody-mediated protection compared to wild-type antigens, with effectiveness that often extends beyond the sequence design space of the COBRA. In particular, the use of COBRA hemagglutinin (HA) proteins has led to the discovery of broadly reactive antibodies that are suggestive of their therapeutic potential. Understanding the extent to which these antibodies are effective is key to assessing the resilience of vaccine-induced immunity to diverging influenza strains. To investigate this, we tested the binding of broadly reactive antibodies with a diverse panel of H3 HA proteins. Using cryo-electron microscopy, we defined the molecular characteristics of binding for these antibodies at the paratope-epitope interface. Through sequence and structural comparisons, we observed the correlative patterns between antibody affinity and antigen structure. These data shed light on the breadth and limitations of broadly reactive antibody responses in the context of an ever-changing landscape of influenza virus strains, yielding insights into strategies for universal vaccine design.IMPORTANCEFormulating effective influenza vaccines remains a challenge due to a constantly changing landscape of circulating viruses. This is particularly true for H3N2 viruses that undergo a high degree of antigenic drift. Several new vaccine designs can elicit broadly neutralizing antibodies that are effective against a range of influenza strains. More insight is needed, however, into how resilient these antibodies will be to future strains that evolve in the context of this selective pressure. Here, we measured the precise binding characteristics of three broadly neutralizing antibodies to 18 different hemagglutinin (HA) proteins representing almost 50 years of virus evolution. Using single-particle cryo-electron microscopy and X-ray crystallography, we determined the structural characteristics of the epitopes bound by these antibodies and identified specific amino acids that greatly impact the effectiveness of these antibodies. This provides important insights into the longevity of antibody efficacy that can help guide design choices in next-generation vaccines. | |||||||||||||||||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 9do2.cif.gz | 255.3 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9do2.ent.gz | 198.7 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9do2.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/do/9do2 ftp://data.pdbj.org/pub/pdb/validation_reports/do/9do2 | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 47071MC ![]() 9b7gC ![]() 9b7hC ![]() 9b7iC ![]() 9dn2C M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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| 類似構造データ | 類似検索 - 機能・相同性 F&H 検索 |
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リンク
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集合体
| 登録構造単位 | ![]()
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要素
-タンパク質 , 1種, 3分子 ABC
| #3: タンパク質 | 分子量: 64499.406 Da / 分子数: 3 / 由来タイプ: 組換発現 由来: (組換発現) ![]() Influenza A virus (A型インフルエンザウイルス)遺伝子: HA / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: A0A2P1ADT1 |
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-抗体 , 2種, 2分子 HL
| #1: 抗体 | 分子量: 13839.373 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 発現宿主: Homo sapiens (ヒト) |
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| #2: 抗体 | 分子量: 11663.727 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 発現宿主: Homo sapiens (ヒト) |
-糖 , 4種, 23分子 
| #4: 多糖 | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #5: 多糖 | #6: 多糖 | alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D- ...alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | #7: 糖 | ChemComp-NAG / |
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-詳細
| 研究の焦点であるリガンドがあるか | Y |
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| Has protein modification | Y |
-実験情報
-実験
| 実験 | 手法: 電子顕微鏡法 |
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| EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
| 構成要素 | 名称: Complex of #1664 Fab fragment with NG2 COBRA hemagglutinin タイプ: COMPLEX / Entity ID: #1-#3 / 由来: RECOMBINANT |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) |
| 緩衝液 | pH: 7.5 |
| 試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
| 急速凍結 | 凍結剤: ETHANE |
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電子顕微鏡撮影
| 顕微鏡 | モデル: TFS GLACIOS |
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| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 200 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 900 nm |
| 撮影 | 電子線照射量: 57 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) |
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解析
| EMソフトウェア |
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| CTF補正 | タイプ: PHASE FLIPPING ONLY | ||||||||||||||||||||||||
| 粒子像の選択 | 選択した粒子像数: 2948802 | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 3.45 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 110663 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 精密化 | 最高解像度: 3.45 Å 立体化学のターゲット値: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS) | ||||||||||||||||||||||||
| 拘束条件 |
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ムービー
コントローラー
万見について




Homo sapiens (ヒト)
Influenza A virus (A型インフルエンザウイルス)
米国, 1件
引用






PDBj








FIELD EMISSION GUN