ジャーナル: J Virol / 年: 2012 タイトル: The crystal structure of a coxsackievirus B3-RD variant and a refined 9-angstrom cryo-electron microscopy reconstruction of the virus complexed with decay-accelerating factor (DAF) ...タイトル: The crystal structure of a coxsackievirus B3-RD variant and a refined 9-angstrom cryo-electron microscopy reconstruction of the virus complexed with decay-accelerating factor (DAF) provide a new footprint of DAF on the virus surface. 著者: Joshua D Yoder / Javier O Cifuente / Jieyan Pan / Jeffrey M Bergelson / Susan Hafenstein / 要旨: The coxsackievirus-adenovirus receptor (CAR) and decay-accelerating factor (DAF) have been identified as cellular receptors for coxsackievirus B3 (CVB3). The first described DAF-binding isolate was ...The coxsackievirus-adenovirus receptor (CAR) and decay-accelerating factor (DAF) have been identified as cellular receptors for coxsackievirus B3 (CVB3). The first described DAF-binding isolate was obtained during passage of the prototype strain, Nancy, on rhabdomyosarcoma (RD) cells, which express DAF but very little CAR. Here, the structure of the resulting variant, CVB3-RD, has been solved by X-ray crystallography to 2.74 Å, and a cryo-electron microscopy reconstruction of CVB3-RD complexed with DAF has been refined to 9.0 Å. This new high-resolution structure permits us to correct an error in our previous view of DAF-virus interactions, providing a new footprint of DAF that bridges two adjacent protomers. The contact sites between the virus and DAF clearly encompass CVB3-RD residues recently shown to be required for binding to DAF; these residues interact with DAF short consensus repeat 2 (SCR2), which is known to be essential for virus binding. Based on the new structure, the mode of the DAF interaction with CVB3 differs significantly from the mode reported previously for DAF binding to echoviruses.
超分子 #1000: Coxsackievirus B3 strain RD (CVB3-RD), complexed with decay-accel...
超分子
名称: Coxsackievirus B3 strain RD (CVB3-RD), complexed with decay-accelerating factor (DAF) タイプ: sample / ID: 1000 詳細: One DAF binds each binding site (one per CVB3-RD protomer). 集合状態: One receptor per virus protomer / Number unique components: 2
分子量
理論値: 7 MDa
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超分子 #1: Human coxsackievirus B3
超分子
名称: Human coxsackievirus B3 / タイプ: virus / ID: 1 / NCBI-ID: 12072 / 生物種: Human coxsackievirus B3 / 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: No
試料ホルダー: Side mounted nitrogen cooled / 試料ホルダーモデル: GATAN LIQUID NITROGEN
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画像解析
詳細
Using the program Robem, particles were picked from 36 of the highest quality micrographs with a selection area sized to 171x171 pixels and preprocessed using program autopp to remove blemishes, linearize, normalize, and apodize. To correct for contrast transfer function, defocus and astigmatism values were assessed from the digitized images using the program ctffind3.
CTF補正
詳細: AUTO3DEM
最終 再構成
アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 9.0 Å / 解像度の算出法: FSC 0.5 CUT-OFF ソフトウェア - 名称: AUTO3DEM, CTFFIND, autopp, Robem 使用した粒子像数: 3010