ジャーナル: Cell Rep / 年: 2016 タイトル: A Molecular-Level Account of the Antigenic Hantaviral Surface. 著者: Sai Li / Ilona Rissanen / Antra Zeltina / Jussi Hepojoki / Jayna Raghwani / Karl Harlos / Oliver G Pybus / Juha T Huiskonen / Thomas A Bowden / 要旨: Hantaviruses, a geographically diverse group of zoonotic pathogens, initiate cell infection through the concerted action of Gn and Gc viral surface glycoproteins. Here, we describe the high- ...Hantaviruses, a geographically diverse group of zoonotic pathogens, initiate cell infection through the concerted action of Gn and Gc viral surface glycoproteins. Here, we describe the high-resolution crystal structure of the antigenic ectodomain of Gn from Puumala hantavirus (PUUV), a causative agent of hemorrhagic fever with renal syndrome. Fitting of PUUV Gn into an electron cryomicroscopy reconstruction of intact Gn-Gc spike complexes from the closely related but non-pathogenic Tula hantavirus localized Gn tetramers to the membrane-distal surface of the virion. The accuracy of the fitting was corroborated by epitope mapping and genetic analysis of available PUUV sequences. Interestingly, Gn exhibits greater non-synonymous sequence diversity than the less accessible Gc, supporting a role of the host humoral immune response in exerting selective pressure on the virus surface. The fold of PUUV Gn is likely to be widely conserved across hantaviruses.
モード: BRIGHT FIELD / 倍率(公称値): 160000 X / 倍率(補正後): 37037 X / 最大 デフォーカス(公称値): 3800 nm / 最小 デフォーカス(公称値): 2000 nm / Cs: 2 mm
試料ホルダ
温度: 100 K / 傾斜角・最大: 45 ° / 傾斜角・最小: -45 °
撮影
電子線照射量: 60 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k)
画像スキャン
デジタル画像の数: 30
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解析
EMソフトウェア
ID
名称
カテゴリ
詳細
1
UCSF Chimera
モデルフィッティング
2
Dynamo
3次元再構成
3
IMOD
3次元再構成
4
UCSF Chimera
モデルフィッティング
Segger
CTF補正
詳細: EACH TILTED IMAGE
対称性
点対称性: C2 (2回回転対称)
3次元再構成
手法: SUBTOMOGRAM AVERAGING / 解像度: 15.6 Å / 粒子像の数: 5449 / ピクセルサイズ(実測値): 2.7 Å / 倍率補正: KNOWN ATOMIC MODEL 詳細: SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-3364. (DEPOSITION ID: 14310). 対称性のタイプ: POINT
原子モデル構築
プロトコル: OTHER / 空間: REAL / Target criteria: Cross-correlation coefficient 詳細: METHOD--LOCAL CORRELATION REFINEMENT PROTOCOL--X-RAY