ジャーナル: Nat Struct Mol Biol / 年: 2005 タイトル: The tail structure of bacteriophage T4 and its mechanism of contraction. 著者: Victor A Kostyuchenko / Paul R Chipman / Petr G Leiman / Fumio Arisaka / Vadim V Mesyanzhinov / Michael G Rossmann / 要旨: Bacteriophage T4 and related viruses have a contractile tail that serves as an efficient mechanical device for infecting bacteria. A three-dimensional cryo-EM reconstruction of the mature T4 tail ...Bacteriophage T4 and related viruses have a contractile tail that serves as an efficient mechanical device for infecting bacteria. A three-dimensional cryo-EM reconstruction of the mature T4 tail assembly at 15-A resolution shows the hexagonal dome-shaped baseplate, the extended contractile sheath, the long tail fibers attached to the baseplate and the collar formed by six whiskers that interact with the long tail fibers. Comparison with the structure of the contracted tail shows that tail contraction is associated with a substantial rearrangement of the domains within the sheath protein and results in shortening of the sheath to about one-third of its original length. During contraction, the tail tube extends beneath the baseplate by about one-half of its total length and rotates by 345 degrees , allowing it to cross the host's periplasmic space.
履歴
登録
2005年5月20日
登録サイト: PDBE / 処理サイト: PDBE
改定 1.0
2005年9月21日
Provider: repository / タイプ: Initial release
改定 1.1
2014年1月15日
Group: Database references / Derived calculations ...Database references / Derived calculations / Other / Version format compliance
FIBRITIN / WHISKER ANTIGEN CONTROL PROTEIN / COLLAR PROTEIN / 座標モデル: Cα原子のみ
分子量: 51909.164 Da / 分子数: 3 / 由来タイプ: 天然 詳細: THE PROTEIN WAS MODELED WITH SEGMENTS OF TRIPLE HELICAL COILED COIL ARRANGED ALONG CRYO-EM DENSITY ASSIGNED TO FIBRITIN 由来: (天然) BACTERIOPHAGE T4 (ファージ) / 参照: UniProt: P10104
配列の詳細
THE MODELED STRUCTURE DOES NOT INCLUDE LOOP REGIONS
モード: BRIGHT FIELD / 倍率(公称値): 45000 X / 倍率(補正後): 47000 X / 最大 デフォーカス(公称値): 3200 nm / 最小 デフォーカス(公称値): 800 nm / Cs: 2 mm
試料ホルダ
温度: 100 K
撮影
フィルム・検出器のモデル: KODAK SO-163 FILM
画像スキャン
デジタル画像の数: 75
放射波長
相対比: 1
-
解析
EMソフトウェア
ID
名称
カテゴリ
1
XFIT
モデルフィッティング
2
SPIDER
3次元再構成
CTF補正
詳細: EACH IMAGE
対称性
点対称性: C6 (6回回転対称)
3次元再構成
手法: REAL SPACE SIRT / 解像度: 15 Å / 粒子像の数: 3029 / ピクセルサイズ(公称値): 3.97 Å / ピクセルサイズ(実測値): 3.97 Å / 倍率補正: 47000 / 詳細: EM MAP DEPOSITED AS EMD-1126 / 対称性のタイプ: POINT
原子モデル構築
プロトコル: OTHER / 空間: REAL / 詳細: REFINEMENT PROTOCOL--MANUAL FITTING