+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-2162 | |||||||||
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タイトル | Structure of bacteriophage phi29 prohead particle with a double insertion mutation (U92,U93) in the pRNA | |||||||||
マップデータ | Single particle CryoEM reconstruction of a phi29 prohead particle with a double U92U93 deletion in the pRNA | |||||||||
試料 |
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キーワード | bacteriophage / bacteriophage phi29 / phi29 / pRNA / DNA packaging | |||||||||
生物種 | Bacillus phage phi29 (ファージ) | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 17.3 Å | |||||||||
データ登録者 | Zhao W / Saha M / Ke A / Morais MC / Jardine PJ / Grimes S | |||||||||
引用 | ジャーナル: J Virol / 年: 2012 タイトル: A three-helix junction is the interface between two functional domains of prohead RNA in 29 DNA packaging. 著者: Wei Zhao / Mitul Saha / Ailong Ke / Marc C Morais / Paul J Jardine / Shelley Grimes / 要旨: The double-stranded-DNA bacteriophages employ powerful molecular motors to translocate genomic DNA into preformed capsids during the packaging step in phage assembly. Bacillus subtilis bacteriophage ...The double-stranded-DNA bacteriophages employ powerful molecular motors to translocate genomic DNA into preformed capsids during the packaging step in phage assembly. Bacillus subtilis bacteriophage 29 has an oligomeric prohead RNA (pRNA) that is an essential component of its packaging motor. The crystal structure of the pRNA-prohead binding domain suggested that a three-helix junction constitutes both a flexible region and part of a rigid RNA superhelix. Here we define the functional role of the three-helix junction in motor assembly and DNA packaging. Deletion mutagenesis showed that a U-rich region comprising two sides of the junction plays a role in the stable assembly of pRNA to the prohead. The retention of at least two bulged residues in this region was essential for pRNA binding and thereby subsequent DNA packaging. Additional deletions resulted in the loss of the ability of pRNA to multimerize in solution, consistent with the hypothesis that this region provides the flexibility required for pRNA oligomerization and prohead binding. The third side of the junction is part of a large RNA superhelix that spans the motor. The insertion of bases into this feature resulted in a loss of DNA packaging and an impairment of initiation complex assembly. Additionally, cryo-electron microscopy (cryoEM) analysis of third-side insertion mutants showed an increased flexibility of the helix that binds the ATPase, suggesting that the rigidity of the RNA superhelix is necessary for efficient motor assembly and function. These results highlight the critical role of the three-way junction in bridging the prohead binding and ATPase assembly functions of pRNA. | |||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | EMマップ: SurfViewMolmilJmol/JSmol |
添付画像 |
-ダウンロードとリンク
-EMDBアーカイブ
マップデータ | emd_2162.map.gz | 68.5 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-2162-v30.xml emd-2162.xml | 10 KB 10 KB | 表示 表示 | EMDBヘッダ |
画像 | EMD-2162.png | 169 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-2162 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-2162 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_2162_validation.pdf.gz | 235.1 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_2162_full_validation.pdf.gz | 234.2 KB | 表示 | |
XML形式データ | emd_2162_validation.xml.gz | 6.9 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-2162 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-2162 | HTTPS FTP |
-関連構造データ
-リンク
EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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-マップ
ファイル | ダウンロード / ファイル: emd_2162.map.gz / 形式: CCP4 / 大きさ: 100.6 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Single particle CryoEM reconstruction of a phi29 prohead particle with a double U92U93 deletion in the pRNA | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ |
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密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
-試料の構成要素
-全体 : Bacteriophage phi29 prohead particle with a double insertion muta...
全体 | 名称: Bacteriophage phi29 prohead particle with a double insertion mutation (U92,U93) in the pRNA |
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要素 |
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-超分子 #1000: Bacteriophage phi29 prohead particle with a double insertion muta...
超分子 | 名称: Bacteriophage phi29 prohead particle with a double insertion mutation (U92,U93) in the pRNA タイプ: sample / ID: 1000 集合状態: The prohead is derived from a prolate icosahedron with T = 3, Q = 5 quasi-symmetry wherein a pentameric capsomer at one end of the particle is replaced by a complex including a ...集合状態: The prohead is derived from a prolate icosahedron with T = 3, Q = 5 quasi-symmetry wherein a pentameric capsomer at one end of the particle is replaced by a complex including a dodecameric connector protein and a pentameric pRNA Number unique components: 1 |
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分子量 | 理論値: 12.4 MDa 手法: Computed from 255 copies of the capsid protein, 12 copies of the connector protein, and 5 copies of the pRNA |
-超分子 #1: Bacillus phage phi29
超分子 | 名称: Bacillus phage phi29 / タイプ: virus / ID: 1 / Name.synonym: bacteriophage phi29 詳細: The phi29 prohead particle was treated with RNase to remove the WT pRNA, and then incubated with exogenously produced pRNA engineered to contain a double U92,U93 insertion mutation. NCBI-ID: 10756 / 生物種: Bacillus phage phi29 / ウイルスタイプ: VIRUS-LIKE PARTICLE / ウイルス・単離状態: SPECIES / ウイルス・エンベロープ: No / ウイルス・中空状態: Yes / Syn species name: bacteriophage phi29 |
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宿主 | 生物種: Bacillus subtilis (枯草菌) / 別称: BACTERIA(EUBACTERIA) |
分子量 | 理論値: 12.4 MDa |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
試料の集合状態 | particle |
-試料調製
濃度 | 0.1 mg/mL |
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緩衝液 | pH: 7.8 / 詳細: 25 mM Tris-HCl, 5 mM MgCl2, 50 mM NaCl |
グリッド | 詳細: Quantifoil holey carbon on top of200 mesh copper grid, plasma cleaned |
凍結 | 凍結剤: ETHANE / 装置: HOMEMADE PLUNGER 手法: Blot grid from behind the sample for ~4 seconds before plunging. |
-電子顕微鏡法
顕微鏡 | JEOL 2200FS |
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アライメント法 | Legacy - 非点収差: Objective lens astigmatism was corrected at 100,000 times magnification |
特殊光学系 | エネルギーフィルター - 名称: JEOL |
日付 | 2011年3月9日 |
撮影 | カテゴリ: CCD フィルム・検出器のモデル: GATAN ULTRASCAN 4000 (4k x 4k) 実像数: 109 / 平均電子線量: 20 e/Å2 |
電子線 | 加速電圧: 200 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | 倍率(補正後): 60000 / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.0 mm / 最大 デフォーカス(公称値): 3.0 µm / 最小 デフォーカス(公称値): 0.64 µm / 倍率(公称値): 60000 |
試料ステージ | 試料ホルダー: Side entry liquid nitrogen-cooled cryo specimen holder 試料ホルダーモデル: GATAN LIQUID NITROGEN |
-画像解析
詳細 | The particles were selected using the model-based automatic particle selection implemented in EMAN, followed by manual deletion of bad particles and manual selection of missed particles |
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CTF補正 | 詳細: Each micrograph |
最終 再構成 | 想定した対称性 - 点群: C5 (5回回転対称) / アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 17.3 Å / 解像度の算出法: FSC 0.5 CUT-OFF / ソフトウェア - 名称: EMAN 詳細: C5 symmetry was imposed in all stages of the reconstruction, with the 5-fold axis along Z. The final map was low-pass filtered at 14 angstrom units 使用した粒子像数: 2134 |