+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7tz5 | ||||||
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タイトル | Cryo-EM structure of antibody TJ5-5 bound to H3 COBRA TJ5 hemagglutinin | ||||||
要素 |
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キーワード | VIRAL PROTEIN/IMMUNE SYSTEM / H3 influenza virus / monoclonal antibody / 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 / apical plasma membrane / 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 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: 3.41 Å | ||||||
データ登録者 | Abbadi, N.S. / Mousa, J.J. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: J Virol / 年: 2022 タイトル: Differential Recognition of Computationally Optimized H3 Hemagglutinin Influenza Vaccine Candidates by Human Antibodies. 著者: Nada Abbadi / Kaito Nagashima / Alma Pena-Briseno / Ted M Ross / Jarrod J Mousa / 要旨: Among circulating influenza viruses in humans, H3N2 viruses typically evolve faster than other subtypes and have caused disease in millions of people since emerging in 1968. Computationally optimized ...Among circulating influenza viruses in humans, H3N2 viruses typically evolve faster than other subtypes and have caused disease in millions of people since emerging in 1968. Computationally optimized broadly reactive antigen (COBRA) technology is one strategy to broaden vaccine-elicited antibody responses among influenza subtypes. In this study, we determined the structural integrity of an H3N2 COBRA hemagglutinin (HA), TJ5, and we probed the antigenic profile of several H3N2 COBRA HAs by assessing recognition of these immunogens by human B cells from seasonally vaccinated human subjects. Of three recently described COBRA H3 HA antigens (TJ5, NG2, and J4), we determined that TJ5 and J4 HA proteins recognize pre-existing B cells more effectively than NG2 HA and a wild-type Hong Kong/4801/2014 protein. We also isolated a panel of 12 H3 HA-specific human monoclonal antibodies (MAbs) and identified that most MAbs recognize both wild-type and COBRA HA proteins and have functional activity against a broad panel of H3N2 viruses. Most MAbs target the receptor-binding site, and one MAb targets the HA stem. MAb TJ5-5 recognizes TJ5 and J4 COBRA HA proteins but has poor recognition of NG2 HA, similar to the global B-cell analysis. We determined a 3.4 Å structure via cryo-electron microscopy of Fab TJ5-5 complexed with the H3 COBRA TJ5, which revealed residues important to the differential binding. Overall, these studies determined that COBRA H3 HA proteins have correct antigenic and structural features, and the proteins are recognized by B cells and MAbs isolated from seasonally vaccinated humans. Vaccine development for circulating influenza viruses, particularly for the H3N2 subtype, remains challenging due to consistent antigenic drift. Computationally optimized broadly reactive antigen (COBRA) technology has proven effective for broadening influenza hemagglutinin (HA)-elicited antibody responses compared to wild-type immunogens. Here, we determined the structural features and antigenic profiles of H3 COBRA HA proteins. Two H3 COBRA HA proteins, TJ5 and J4, are better recognized by pre-existing B cells and monoclonal antibodies from the 2017 to 2018 vaccine season compared to COBRA NG2 and a wild-type A/Hong Kong/2014 HA protein. We determined a cryo-electron microscopy (cryo-EM) structure of one MAb that poorly recognizes NG2, MAb TJ5-5, in complex with the TJ5 COBRA HA protein and identified residues critical to MAb recognition. As NG2 is more effective than TJ5 for the recent Hong Kong/2019 virus, these data provide insights into the diminished effectiveness of influenza vaccines across vaccine seasons. | ||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 7tz5.cif.gz | 361.8 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7tz5.ent.gz | 293.6 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7tz5.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
文書・要旨 | 7tz5_validation.pdf.gz | 897.7 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 7tz5_full_validation.pdf.gz | 935.4 KB | 表示 | |
XML形式データ | 7tz5_validation.xml.gz | 62.6 KB | 表示 | |
CIF形式データ | 7tz5_validation.cif.gz | 95.5 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/tz/7tz5 ftp://data.pdbj.org/pub/pdb/validation_reports/tz/7tz5 | HTTPS FTP |
-関連構造データ
関連構造データ | 26202MC 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 (文献) |
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類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
#1: 抗体 | 分子量: 13487.161 Da / 分子数: 3 / 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) #2: 抗体 | 分子量: 11114.028 Da / 分子数: 3 / 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) #3: タンパク質 | 分子量: 55677.242 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: M1ND93 Has protein modification | Y | |
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-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 |
-試料調製
構成要素 |
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由来(天然) |
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由来(組換発現) |
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ウイルスについての詳細 |
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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 |
-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: 57.22 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) |
-解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3次元再構成 | 解像度: 3.41 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 101267 / 対称性のタイプ: POINT |