ジャーナル: J Virol / 年: 2013 タイトル: Structural changes in dengue virus when exposed to a temperature of 37°C. 著者: Guntur Fibriansah / Thiam-Seng Ng / Victor A Kostyuchenko / Jaime Lee / Sumarlin Lee / Jiaqi Wang / Shee-Mei Lok / 要旨: Previous binding studies of antibodies that recognized a partially or fully hidden epitope suggest that insect cell-derived dengue virus undergoes structural changes at an elevated temperature. This ...Previous binding studies of antibodies that recognized a partially or fully hidden epitope suggest that insect cell-derived dengue virus undergoes structural changes at an elevated temperature. This was confirmed by our cryo-electron microscopy images of dengue virus incubated at 37°C, where viruses change their surface from smooth to rough. Here we present the cryo-electron microscopy structures of dengue virus at 37°C. Image analysis showed four classes of particles. The three-dimensional (3D) map of one of these classes, representing half of the imaged virus population, shows that the E protein shell has expanded and there is a hole at the 3-fold vertices. Fitting E protein structures into the map suggests that all of the interdimeric and some intradimeric E protein interactions are weakened. The accessibility of some previously found cryptic epitopes on this class of particles is discussed.
名称: Dengue Virus 2 / タイプ: sample / ID: 1000 / 集合状態: full dengue virion / Number unique components: 1
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超分子 #1: Dengue virus 2
超分子
名称: Dengue virus 2 / タイプ: virus / ID: 1 / NCBI-ID: 11060 / 生物種: Dengue virus 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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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, 120 mM NaCl, 1 mM EDTA
グリッド
詳細: lacey carbon grid, layered with ultra thin carbon
凍結
凍結剤: ETHANE / チャンバー内湿度: 100 % / 装置: FEI VITROBOT MARK IV 手法: 2.5 microlitres virus sample was added per grid and blotted with filter paper for 2.5 s before plunging