+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-8292 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
タイトル | expanded poliovirus in complex with VHH 12B | |||||||||
マップデータ | naturally expanded poliovirus (not heated) | |||||||||
試料 |
| |||||||||
生物種 | Poliovirus type 1 (strain Mahoney) (ポリオウイルス) | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 6.9 Å | |||||||||
データ登録者 | Strauss M / Schotte L / Filman DJ / Hogle JM | |||||||||
引用 | ジャーナル: J Virol / 年: 2017 タイトル: Cryo-electron Microscopy Structures of Expanded Poliovirus with VHHs Sample the Conformational Repertoire of the Expanded State. 著者: Mike Strauss / Lise Schotte / Krishanthi S Karunatilaka / David J Filman / James M Hogle / 要旨: By using cryo-electron microscopy, expanded 80S-like poliovirus virions (poliovirions) were visualized in complexes with four 80S-specific camelid VHHs (Nanobodies). In all four complexes, the VHHs ...By using cryo-electron microscopy, expanded 80S-like poliovirus virions (poliovirions) were visualized in complexes with four 80S-specific camelid VHHs (Nanobodies). In all four complexes, the VHHs bind to a site on the top surface of the capsid protein VP3, which is hidden in the native virus. Interestingly, although the four VHHs bind to the same site, the structures of the expanded virus differ in detail in each complex, suggesting that each of the Nanobodies has sampled a range of low-energy structures available to the expanded virion. By stabilizing unique structures of expanded virions, VHH binding permitted a more detailed view of the virus structure than was previously possible, leading to a better understanding of the expansion process that is a critical step in infection. It is now clear which polypeptide chains become disordered and which become rearranged. The higher resolution of these structures also revealed well-ordered conformations for the EF loop of VP2, the GH loop of VP3, and the N-terminal extensions of VP1 and VP2, which, in retrospect, were present in lower-resolution structures but not recognized. These structural observations help to explain preexisting mutational data and provide insights into several other stages of the poliovirus life cycle, including the mechanism of receptor-triggered virus expansion. IMPORTANCE: When poliovirus infects a cell, it undergoes a change in its structure in order to pass RNA through its protein coat, but this altered state is short-lived and thus poorly understood. The ...IMPORTANCE: When poliovirus infects a cell, it undergoes a change in its structure in order to pass RNA through its protein coat, but this altered state is short-lived and thus poorly understood. The structures of poliovirus bound to single-domain antibodies presented here capture the altered virus in what appear to be intermediate states. A careful analysis of these structures lets us better understand the molecular mechanism of infection and how these changes in the virus lead to productive-infection events. | |||||||||
履歴 |
|
-構造の表示
ムービー |
ムービービューア |
---|---|
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_8292.map.gz | 12.6 MB | EMDBマップデータ形式 | |
---|---|---|---|---|
ヘッダ (付随情報) | emd-8292-v30.xml emd-8292.xml | 10.1 KB 10.1 KB | 表示 表示 | EMDBヘッダ |
画像 | emd_8292.png | 61.7 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-8292 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-8292 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_8292_validation.pdf.gz | 78.6 KB | 表示 | EMDB検証レポート |
---|---|---|---|---|
文書・詳細版 | emd_8292_full_validation.pdf.gz | 77.7 KB | 表示 | |
XML形式データ | emd_8292_validation.xml.gz | 494 B | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-8292 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-8292 | HTTPS FTP |
-関連構造データ
-リンク
EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
---|
-マップ
ファイル | ダウンロード / ファイル: emd_8292.map.gz / 形式: CCP4 / 大きさ: 125 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
注釈 | naturally expanded poliovirus (not heated) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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: 1.972 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
|
-添付データ
-試料の構成要素
-全体 : naturally occurring expanded poliovirus (not heated)
全体 | 名称: naturally occurring expanded poliovirus (not heated) |
---|---|
要素 |
|
-超分子 #1: naturally occurring expanded poliovirus (not heated)
超分子 | 名称: naturally occurring expanded poliovirus (not heated) タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#4 |
---|---|
由来(天然) | 生物種: Poliovirus type 1 (strain Mahoney) (ポリオウイルス) |
分子量 | 理論値: 9 MDa |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
---|---|
解析 | 単粒子再構成法 |
試料の集合状態 | particle |
-試料調製
濃度 | 0.45 mg/mL |
---|---|
緩衝液 | pH: 7 |
グリッド | モデル: Quantifoil R1.2/1.3 / 材質: COPPER / メッシュ: 300 |
凍結 | 凍結剤: ETHANE |
-電子顕微鏡法
顕微鏡 | FEI POLARA 300 |
---|---|
撮影 | #0 - Image recording ID: 1 #0 - フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) #0 - 検出モード: SUPER-RESOLUTION / #0 - 平均電子線量: 35.0 e/Å2 / #1 - Image recording ID: 2 #1 - フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) #1 - 平均電子線量: 35.0 e/Å2 |
電子線 | 加速電圧: 300 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 |
実験機器 | モデル: Tecnai Polara / 画像提供: FEI Company |