- EMDB-2969: Cryo-EM structure of Dengue virus serotype 2 strain New Guinea-C ... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-2969
タイトル
Cryo-EM structure of Dengue virus serotype 2 strain New Guinea-C complexed with human antibody 2D22 Fab at 37 degree C. The Fab molecules were added to virus that was pre-incubated at 37 degree C.
マップデータ
Reconstruction of Dengue Virus serotype 2 strain New Guinea-C in complex with human antibody 2D22 Fab at 37 degree C. The Fab molecules were added to the virus that has been pre-incubated at 37 degree C.
試料
試料: Dengue virus serotype 2 strain New Guinea-C complexed with Fab fragments of human antibody 2D22 at 37 degree C.
ウイルス: Dengue Virus serotype 2 (デング熱ウイルス)
タンパク質・ペプチド: Antigen-binding fragment of human antibody 2D22
キーワード
dengue virus / human antibody / cryo-EM / neutralization
生物種
Homo sapiens (ヒト) / Dengue Virus serotype 2 (デング熱ウイルス)
ジャーナル: Science / 年: 2015 タイトル: DENGUE VIRUS. Cryo-EM structure of an antibody that neutralizes dengue virus type 2 by locking E protein dimers. 著者: Guntur Fibriansah / Kristie D Ibarra / Thiam-Seng Ng / Scott A Smith / Joanne L Tan / Xin-Ni Lim / Justin S G Ooi / Victor A Kostyuchenko / Jiaqi Wang / Aravinda M de Silva / Eva Harris / ...著者: Guntur Fibriansah / Kristie D Ibarra / Thiam-Seng Ng / Scott A Smith / Joanne L Tan / Xin-Ni Lim / Justin S G Ooi / Victor A Kostyuchenko / Jiaqi Wang / Aravinda M de Silva / Eva Harris / James E Crowe / Shee-Mei Lok / 要旨: There are four closely-related dengue virus (DENV) serotypes. Infection with one serotype generates antibodies that may cross-react and enhance infection with other serotypes in a secondary infection. ...There are four closely-related dengue virus (DENV) serotypes. Infection with one serotype generates antibodies that may cross-react and enhance infection with other serotypes in a secondary infection. We demonstrated that DENV serotype 2 (DENV2)-specific human monoclonal antibody (HMAb) 2D22 is therapeutic in a mouse model of antibody-enhanced severe dengue disease. We determined the cryo-electron microscopy (cryo-EM) structures of HMAb 2D22 complexed with two different DENV2 strains. HMAb 2D22 binds across viral envelope (E) proteins in the dimeric structure, which probably blocks the E protein reorganization required for virus fusion. HMAb 2D22 "locks" two-thirds of or all dimers on the virus surface, depending on the strain, but neutralizes these DENV2 strains with equal potency. The epitope defined by HMAb 2D22 is a potential target for vaccines and therapeutics.
ダウンロード / ファイル: emd_2969.map.gz / 形式: CCP4 / 大きさ: 500 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
Reconstruction of Dengue Virus serotype 2 strain New Guinea-C in complex with human antibody 2D22 Fab at 37 degree C. The Fab molecules were added to the virus that has been pre-incubated at 37 degree C.
全体 : Dengue virus serotype 2 strain New Guinea-C complexed with Fab fr...
全体
名称: Dengue virus serotype 2 strain New Guinea-C complexed with Fab fragments of human antibody 2D22 at 37 degree C.
要素
試料: Dengue virus serotype 2 strain New Guinea-C complexed with Fab fragments of human antibody 2D22 at 37 degree C.
ウイルス: Dengue Virus serotype 2 (デング熱ウイルス)
タンパク質・ペプチド: Antigen-binding fragment of human antibody 2D22
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超分子 #1000: Dengue virus serotype 2 strain New Guinea-C complexed with Fab fr...
超分子
名称: Dengue virus serotype 2 strain New Guinea-C complexed with Fab fragments of human antibody 2D22 at 37 degree C. タイプ: sample / ID: 1000 詳細: The Fab molecules were mixed with the virus that was pre-incubated at 37 degree C Number unique components: 2
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超分子 #1: Dengue Virus serotype 2
超分子
名称: Dengue Virus serotype 2 / タイプ: virus / ID: 1 / 生物種: Dengue Virus serotype 2 / Sci species strain: New Guinea C / 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: Yes / ウイルス・中空状態: No
宿主
生物種: Homo sapiens (ヒト) / 別称: VERTEBRATES
Host system
生物種: Aedes albopictus (ヒトスジシマカ) / 組換細胞: C6/36
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分子 #1: Antigen-binding fragment of human antibody 2D22
分子
名称: Antigen-binding fragment of human antibody 2D22 / タイプ: protein_or_peptide / ID: 1 / 詳細: 120 copies of Fab molecules bind to virus surface / コピー数: 120 / 組換発現: No
由来(天然)
生物種: Homo sapiens (ヒト) / 別称: Human / 細胞: memory B-cells
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実験情報
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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
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試料調製
緩衝液
pH: 8 / 詳細: 10 mM Tris-HCl pH 8.0, 120 mM NaCl and 1 mM EDTA
グリッド
詳細: ultra-thin carbon-coated lacey carbon grid
凍結
凍結剤: ETHANE / チャンバー内湿度: 100 % / 装置: FEI VITROBOT MARK IV 手法: blotted with filter paper for 2 seconds prior to snap freezing
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電子顕微鏡法
顕微鏡
FEI TITAN KRIOS
温度
平均: 100 K
日付
2014年6月14日
撮影
カテゴリ: CCD フィルム・検出器のモデル: FEI FALCON II (4k x 4k) 実像数: 184 / 平均電子線量: 20 e/Å2