+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-6200 | |||||||||
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タイトル | Cryo-electron microscopy of Enterovirus 71 (EV71) in complex with Fab fragments of neutralizing antibody 22A12 | |||||||||
マップデータ | Reconstruction of EV71 procapsid in complex with Fab22A12 | |||||||||
試料 |
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キーワード | EV71 / picornavirus / Mab22A12 / antibody / Fab / neutralization / canyon / enterovirus / enterovirus 71 | |||||||||
機能・相同性 | 機能・相同性情報 symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MDA-5 activity / picornain 2A / symbiont-mediated suppression of host mRNA export from nucleus / symbiont genome entry into host cell via pore formation in plasma membrane / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / cytoplasmic vesicle membrane / endocytosis involved in viral entry into host cell / nucleoside-triphosphate phosphatase ...symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MDA-5 activity / picornain 2A / symbiont-mediated suppression of host mRNA export from nucleus / symbiont genome entry into host cell via pore formation in plasma membrane / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / cytoplasmic vesicle membrane / endocytosis involved in viral entry into host cell / nucleoside-triphosphate phosphatase / channel activity / monoatomic ion transmembrane transport / RNA helicase activity / induction by virus of host autophagy / RNA-directed RNA polymerase / viral RNA genome replication / cysteine-type endopeptidase activity / RNA-dependent RNA polymerase activity / virus-mediated perturbation of host defense response / DNA-templated transcription / host cell nucleus / virion attachment to host cell / structural molecule activity / ATP hydrolysis activity / proteolysis / RNA binding / ATP binding / metal ion binding 類似検索 - 分子機能 | |||||||||
生物種 | unidentified (未定義) / Human enterovirus 71 (エンテロウイルス) | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 8.8 Å | |||||||||
データ登録者 | Shingler KL / Cifuente JO / Ashley RE / Makhov AM / Conway JF / Hafenstein S | |||||||||
引用 | ジャーナル: J Virol / 年: 2015 タイトル: The enterovirus 71 procapsid binds neutralizing antibodies and rescues virus infection in vitro. 著者: Kristin L Shingler / Javier O Cifuente / Robert E Ashley / Alexander M Makhov / James F Conway / Susan Hafenstein / 要旨: Enterovirus 71 (EV71) is responsible for seasonal outbreaks of hand, foot, and mouth disease in the Asia-Pacific region. The virus has the capability to cause severe disease and death, especially in ...Enterovirus 71 (EV71) is responsible for seasonal outbreaks of hand, foot, and mouth disease in the Asia-Pacific region. The virus has the capability to cause severe disease and death, especially in young children. Although several vaccines are currently in clinical trials, no vaccines or therapeutics have been approved for use. Previous structural studies have revealed that two antigenically distinct capsid forms are produced in EV71-infected cells: an expanded empty capsid, sometimes called a procapsid, and the infectious virus. Specifically, an immunodominant epitope of EV71 that maps to the virus canyon is structurally different in the procapsid and virus. This structure-function study shows that the procapsid can sequester antibodies, thus enhancing EV71 infection in vitro. The results presented here suggest that, due to conformational differences between the EV71 procapsid and virus, the presence of the procapsid in natural virus infections should be considered in the future design of vaccines or therapeutics. IMPORTANCE: In a picornavirus infection, both an infectious and a noninfectious empty capsid, sometimes referred to as a procapsid, are produced. It was novel to discover that the procapsid form of ...IMPORTANCE: In a picornavirus infection, both an infectious and a noninfectious empty capsid, sometimes referred to as a procapsid, are produced. It was novel to discover that the procapsid form of EV71 was expanded and antigenically distinct from the infectious virus. Previously, it had been supposed that this empty capsid was an off-pathway dead end or at best served for storage of pentameric subunits, which was later shown to be unlikely. It remains unexplained why picornaviruses evolutionarily conserve the wasteful production of so much noninfectious capsid. Here, we demonstrate that the EV71 procapsid has different antigenic properties than the infectious virus. Thus, the procapsid has the capacity to sequester neutralizing antibody and protect the virus, promoting or restoring a successful infection in vitro. This important observation should be considered in the future design and development of vaccines and therapeutics. | |||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | EMマップ: SurfViewMolmilJmol/JSmol |
添付画像 |
-ダウンロードとリンク
-EMDBアーカイブ
マップデータ | emd_6200.map.gz | 132.5 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-6200-v30.xml emd-6200.xml | 10.4 KB 10.4 KB | 表示 表示 | EMDBヘッダ |
画像 | emd_6200.tif | 715.2 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-6200 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-6200 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_6200_validation.pdf.gz | 312.1 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_6200_full_validation.pdf.gz | 311.7 KB | 表示 | |
XML形式データ | emd_6200_validation.xml.gz | 7.9 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-6200 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-6200 | HTTPS FTP |
-関連構造データ
-リンク
EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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「今月の分子」の関連する項目 |
-マップ
ファイル | ダウンロード / ファイル: emd_6200.map.gz / 形式: CCP4 / 大きさ: 365 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Reconstruction of EV71 procapsid in complex with Fab22A12 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.27 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
-試料の構成要素
-全体 : Fab fragment of 22A12 monoclonal antibody bound to Enterovirus 71...
全体 | 名称: Fab fragment of 22A12 monoclonal antibody bound to Enterovirus 71 procapsid at the VP1 GH Loop |
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要素 |
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-超分子 #1000: Fab fragment of 22A12 monoclonal antibody bound to Enterovirus 71...
超分子 | 名称: Fab fragment of 22A12 monoclonal antibody bound to Enterovirus 71 procapsid at the VP1 GH Loop タイプ: sample / ID: 1000 / Number unique components: 2 |
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-超分子 #1: Human enterovirus 71
超分子 | 名称: Human enterovirus 71 / タイプ: virus / ID: 1 / Name.synonym: EV71 詳細: Virus procapsid was complexed with Fab fragments of neutralizing antibody 22A12. NCBI-ID: 39054 / 生物種: Human enterovirus 71 / Sci species strain: 1095/Shiga / データベース: NCBI / ウイルスタイプ: VIRION / ウイルス・単離状態: STRAIN / ウイルス・エンベロープ: No / ウイルス・中空状態: Yes / Syn species name: EV71 |
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宿主 | 生物種: Homo sapiens (ヒト) / 別称: VERTEBRATES |
ウイルス殻 | Shell ID: 1 / 直径: 300 Å / T番号(三角分割数): 3 |
-分子 #1: neutralizing antibody 22A12 Fab
分子 | 名称: neutralizing antibody 22A12 Fab / タイプ: protein_or_peptide / ID: 1 / 組換発現: No / データベース: NCBI |
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由来(天然) | 生物種: unidentified (未定義) |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
試料の集合状態 | particle |
-試料調製
濃度 | 1.0 mg/mL |
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緩衝液 | pH: 7.5 / 詳細: 10 mM Tris, 200 mM NaCl, 50 mM MgCl2 |
グリッド | 詳細: holey carbon Quantifoil EM grids |
凍結 | 凍結剤: ETHANE-PROPANE MIXTURE / 装置: FEI VITROBOT MARK III |
-電子顕微鏡法
顕微鏡 | FEI TECNAI F20 |
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日付 | 2011年7月15日 |
撮影 | カテゴリ: FILM / フィルム・検出器のモデル: KODAK SO-163 FILM デジタル化 - スキャナー: NIKON SUPER COOLSCAN 9000 デジタル化 - サンプリング間隔: 6.35 µm |
電子線 | 加速電圧: 200 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.0 mm / 倍率(公称値): 50000 |
試料ステージ | 試料ホルダーモデル: GATAN LIQUID NITROGEN |
実験機器 | モデル: Tecnai F20 / 画像提供: FEI Company |
-画像解析
詳細 | Processing was completed with EMAN2 and AUTO3DEM. |
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CTF補正 | 詳細: CTFFind3 |
最終 再構成 | 解像度のタイプ: BY AUTHOR / 解像度: 8.8 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: EMAN, EMAN2, AUTO3DEM, Chimera / 使用した粒子像数: 15226 |