+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 5a20 | ||||||
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タイトル | Structure of bacteriophage SPP1 head-to-tail interface filled with DNA and tape measure protein | ||||||
要素 |
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キーワード | VIRAL PROTEIN (ウイルスタンパク質) / TAILED BACTERIOPHAGE (カウドウイルス) / SIPHOVIRIDAE (サイフォウイルス科) / SPP1 / VIRAL ASSEMBLY (ウイルス性) / HEAD-TO-TAIL INTERFACE / DNA GATEKEEPER / ALLOSTERIC MECHANISM / CONCERTED REORGANISATION / DIAPHRAGM GATING | ||||||
機能・相同性 | 機能・相同性情報 viral head-tail joining / virus tail fiber assembly / viral DNA genome packaging, headful / virus tail, tube / symbiont genome ejection through host cell envelope, long flexible tail mechanism / viral portal complex / viral procapsid / virus tail / virion component 類似検索 - 分子機能 | ||||||
生物種 | BACILLUS PHAGE SPP1 (ファージ) | ||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 7.6 Å | ||||||
データ登録者 | Chaban, Y. / Lurz, R. / Brasiles, S. / Cornilleau, C. / Karreman, M. / Zinn-Justin, S. / Tavares, P. / Orlova, E.V. | ||||||
引用 | ジャーナル: Proc Natl Acad Sci U S A / 年: 2015 タイトル: Structural rearrangements in the phage head-to-tail interface during assembly and infection. 著者: Yuriy Chaban / Rudi Lurz / Sandrine Brasilès / Charlène Cornilleau / Matthia Karreman / Sophie Zinn-Justin / Paulo Tavares / Elena V Orlova / 要旨: Many icosahedral viruses use a specialized portal vertex to control genome encapsidation and release from the viral capsid. In tailed bacteriophages, the portal system is connected to a tail ...Many icosahedral viruses use a specialized portal vertex to control genome encapsidation and release from the viral capsid. In tailed bacteriophages, the portal system is connected to a tail structure that provides the pipeline for genome delivery to the host cell. We report the first, to our knowledge, subnanometer structures of the complete portal-phage tail interface that mimic the states before and after DNA release during phage infection. They uncover structural rearrangements associated with intimate protein-DNA interactions. The portal protein gp6 of bacteriophage SPP1 undergoes a concerted reorganization of the structural elements of its central channel during interaction with DNA. A network of protein-protein interactions primes consecutive binding of proteins gp15 and gp16 to extend and close the channel. This critical step that prevents genome leakage from the capsid is achieved by a previously unidentified allosteric mechanism: gp16 binding to two different regions of gp15 drives correct positioning and folding of an inner gp16 loop to interact with equivalent loops of the other gp16 subunits. Together, these loops build a plug that closes the channel. Gp16 then fastens the tail to yield the infectious virion. The gatekeeper system opens for viral genome exit at the beginning of infection but recloses afterward, suggesting a molecular diaphragm-like mechanism to control DNA efflux. The mechanisms described here, controlling the essential steps of phage genome movements during virus assembly and infection, are likely to be conserved among long-tailed phages, the largest group of viruses in the Biosphere. | ||||||
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 | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 5a20.cif.gz | 293.1 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb5a20.ent.gz | 238.6 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 5a20.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/a2/5a20 ftp://data.pdbj.org/pub/pdb/validation_reports/a2/5a20 | HTTPS FTP |
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-関連構造データ
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
#1: タンパク質 | 分子量: 57405.355 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) BACILLUS PHAGE SPP1 (ファージ) / 参照: UniProt: P54309 #2: タンパク質 | 分子量: 11629.402 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) BACILLUS PHAGE SPP1 (ファージ) / 参照: UniProt: Q38584 #3: タンパク質 | 分子量: 12615.069 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) BACILLUS PHAGE SPP1 (ファージ) / 参照: UniProt: O48446 #4: タンパク質 | | 分子量: 15025.014 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) BACILLUS PHAGE SPP1 (ファージ) / 参照: UniProt: O48448 #5: タンパク質 | | 分子量: 19172.906 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) BACILLUS PHAGE SPP1 (ファージ) / 参照: UniProt: O48449 |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
-試料調製
構成要素 | 名称: BACTERIOPHAGE SPP1 HEAD- TO-TAIL INTERFACE / タイプ: VIRUS / 詳細: MICROGRAPHS SELECTED BY OPTICAL DIFFRACTION |
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緩衝液 | 名称: SEE REFERENCE FOR DETAILS / pH: 7.5 / 詳細: SEE REFERENCE FOR DETAILS |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | 詳細: CARBON |
急速凍結 | 装置: FEI VITROBOT MARK II / 凍結剤: ETHANE 詳細: VITRIFICATION 1 -- CRYOGEN- ETHANE, INSTRUMENT- FEI VITROBOT |
-電子顕微鏡撮影
実験機器 | モデル: Tecnai F30 / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TECNAI F30 / 日付: 2008年10月9日 |
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELDBright-field microscopy / 倍率(公称値): 39000 X / 最大 デフォーカス(公称値): 3600 nm / 最小 デフォーカス(公称値): 900 nm / Cs: 2 mm |
撮影 | 電子線照射量: 20 e/Å2 / 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: 400 |
-解析
EMソフトウェア |
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CTF補正 | 詳細: EACH PARTICLE | ||||||||||||||||||||||||||||||||
対称性 | 点対称性: C6 (6回回転対称) | ||||||||||||||||||||||||||||||||
3次元再構成 | 手法: ANGULAR RECONSTITUTION / 解像度: 7.6 Å / 粒子像の数: 14000 / ピクセルサイズ(公称値): 1.2 Å / ピクセルサイズ(実測値): 1.15 Å 倍率補正: CROSS- -CORRELATION WITH FITTED ATOMIC COORDINATES 詳細: ATOMIC COORDINATES FOR GP6, GP15, GP16, GP17 WERE OBTAINED FROM PDB FILES 2JES (LEBEDEV ET AL., EMBO J., 2007, 26, 1984), 2KBZ, 2KCA (LHUILLIER ET AL., PROC.NATL.ACAD.SCI. USA, 2009, 106, ...詳細: ATOMIC COORDINATES FOR GP6, GP15, GP16, GP17 WERE OBTAINED FROM PDB FILES 2JES (LEBEDEV ET AL., EMBO J., 2007, 26, 1984), 2KBZ, 2KCA (LHUILLIER ET AL., PROC.NATL.ACAD.SCI. USA, 2009, 106, 8507), 2LFP (CHAGOT ET AL., PROTEINS, 2012, 80, 319), CORRESPONDIGLY, AND DOCKED INTO EM ELECTRON DENSITY MAP USING FLEXIBLE FIT. ATOMIC COORDINATES FOR MISSING DOMAINS OF GP6 AND GP17.1. WERE MODELLED USING I-TASSER PROTEIN STRUCTURE PREDICTION SERVER (Y ZHANG, BMC BIOINFORMATICS, 2008, 9, 40) AND DOCKED INTO EM ELECTRON DENSITY MAP USING FLEXIBLE FIT. SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2993. (DEPOSITION ID: 13331). SEQUENCE N-TERMINAL RESIDUES 1-28 AND C-TERMINAL RESIDUES 468-509 WERE NOT INCLUDED IN THE ATOMIC COORDINATES USED FOR DOCKING DUE TO DIFFICULTIES TRACING CORRESPONDING DENSITIES IN THE EM MAP. ASN 365 IS SUBSTITUTED FOR LYS, SAME AS IN PDB COORDINATE FILE 2JES, WHICH WAS USED AS A STARTING POINT FOR THE FITTING. N-TERMINAL RESIDUES 1-3 ARE OMITTED FROM THE DOCKED GP15 SEQUENCE. PRO 6 IS SUBSTITUTED WITH ARG IN GP16 SEQUENCE, AS IT IS IN THE PDB COORDINATE FILE 2KCA USED FOR FITTING N-TERMINAL RESIDUE 1 IS MISSING FROM THE DOCKED GP17 SEQUENCE. N-TERMINAL RESIDUES 1-8 AND C-TERMINAL RESIDUES 170-177 ARE MISSING FROM THE DOCKED GP17.1 SEQUENCE DUE TO DIFFICULTIES TRACING CORRESPONDING DENSITIES IN THE EM MAP. 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: REAL 詳細: METHOD--FLEXIBLE REFINEMENT PROTOCOL--X-RAY, NMR, PREDICTION | ||||||||||||||||||||||||||||||||
精密化 | 最高解像度: 7.6 Å | ||||||||||||||||||||||||||||||||
精密化ステップ | サイクル: LAST / 最高解像度: 7.6 Å
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