+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 3zx8 | ||||||
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タイトル | Cryo-EM reconstruction of native and expanded Turnip Crinkle virus | ||||||
要素 | CAPSID PROTEIN | ||||||
キーワード | VIRUS / GENOMIC RNA STRUCTURE / GENOME UNCOATING / SSRNA VIRUS / ICOSAHEDRAL | ||||||
機能・相同性 | 機能・相同性情報 T=3 icosahedral viral capsid / symbiont-mediated suppression of host innate immune response / virus-mediated perturbation of host defense response / structural molecule activity / RNA binding 類似検索 - 分子機能 | ||||||
生物種 | TURNIP CRINKLE VIRUS (ウイルス) | ||||||
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: 11.5 Å | ||||||
データ登録者 | Bakker, S.E. / Robottom, J. / Hogle, J.M. / Maeda, A. / Pearson, A.R. / Stockley, P.G. / Ranson, N.A. / Harrison, S.C. | ||||||
引用 | ジャーナル: J Mol Biol / 年: 2012 タイトル: Isolation of an asymmetric RNA uncoating intermediate for a single-stranded RNA plant virus. 著者: Saskia E Bakker / Robert J Ford / Amy M Barker / Janice Robottom / Keith Saunders / Arwen R Pearson / Neil A Ranson / Peter G Stockley / 要旨: We have determined the three-dimensional structures of both native and expanded forms of turnip crinkle virus (TCV), using cryo-electron microscopy, which allows direct visualization of the ...We have determined the three-dimensional structures of both native and expanded forms of turnip crinkle virus (TCV), using cryo-electron microscopy, which allows direct visualization of the encapsidated single-stranded RNA and coat protein (CP) N-terminal regions not seen in the high-resolution X-ray structure of the virion. The expanded form, which is a putative disassembly intermediate during infection, arises from a separation of the capsid-forming domains of the CP subunits. Capsid expansion leads to the formation of pores that could allow exit of the viral RNA. A subset of the CP N-terminal regions becomes proteolytically accessible in the expanded form, although the RNA remains inaccessible to nuclease. Sedimentation velocity assays suggest that the expanded state is metastable and that expansion is not fully reversible. Proteolytically cleaved CP subunits dissociate from the capsid, presumably leading to increased electrostatic repulsion within the viral RNA. Consistent with this idea, electron microscopy images show that proteolysis introduces asymmetry into the TCV capsid and allows initial extrusion of the genome from a defined site. The apparent formation of polysomes in wheat germ extracts suggests that subsequent uncoating is linked to translation. The implication is that the viral RNA and its capsid play multiple roles during primary infections, consistent with ribosome-mediated genome uncoating to avoid host antiviral activity. #1: ジャーナル: J Mol Biol / 年: 1986 タイトル: Structure and assembly of turnip crinkle virus. I. X-ray crystallographic structure analysis at 3.2 A resolution. 要旨: The structure of turnip crinkle virus has been determined at 3.2 A resolution, using the electron density of tomato bushy stunt virus as a starting point for phase refinement by non-crystallographic ...The structure of turnip crinkle virus has been determined at 3.2 A resolution, using the electron density of tomato bushy stunt virus as a starting point for phase refinement by non-crystallographic symmetry. The structures are very closely related, especially in the subunit arm and S domain, where only small insertions and deletions and small co-ordinate shifts relate one chain to another. The P domains, although quite similar in fold, are oriented somewhat differently with respect to the S domains. Understanding of the structure of turnip crinkle virus has been important for analyzing its assembly, as described in an accompanying paper. | ||||||
履歴 |
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Remark 650 | HELIX DETERMINATION METHOD: AUTHOR PROVIDED. | ||||||
Remark 700 | SHEET DETERMINATION METHOD: AUTHOR PROVIDED. |
-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 | 3zx8.cif.gz | 161.2 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb3zx8.ent.gz | 114.6 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 3zx8.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/zx/3zx8 ftp://data.pdbj.org/pub/pdb/validation_reports/zx/3zx8 | 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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対称性 | 点対称性: (シェーンフリース記号: I (正20面体型対称)) |
-要素
#1: タンパク質 | 分子量: 37755.586 Da / 分子数: 3 / 由来タイプ: 天然 / 由来: (天然) TURNIP CRINKLE VIRUS (ウイルス) / 株: M / 参照: UniProt: P06663 配列の詳細 | IN CHAIN C RESIDUES 1-52 DISORDERED AND NOT OBSERVED. IN CHAINS A AND B RESIDUES 1-80 DISORDERED ...IN CHAIN C RESIDUES 1-52 DISORDERED | |
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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: TURNIP CRINKLE VIRUS / タイプ: VIRUS |
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緩衝液 | 名称: 10 MM SODIUM PHOSPHATE PH 7.4, 10 MM MAGNESIUM SULPHATE pH: 7.4 詳細: 10 MM SODIUM PHOSPHATE PH 7.4, 10 MM MAGNESIUM SULPHATE |
試料 | 濃度: 2 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | 詳細: HOLEY CARBON |
急速凍結 | 装置: HOMEMADE PLUNGER / 凍結剤: ETHANE 詳細: VITRIFICATION 1 -- CRYOGEN- ETHANE, TEMPERATURE- 77, INSTRUMENT- DOUBLE SIDED AUTOMATED BLOTTER AND PLUNGER, METHOD- BLOT 1.6 SECONDS BEFORE PLUNGING, |
-電子顕微鏡撮影
実験機器 | モデル: Tecnai F20 / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TECNAI F20 |
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 200 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 50000 X / 倍率(補正後): 52911 X / 最大 デフォーカス(公称値): 3500 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 2 mm |
撮影 | 電子線照射量: 15 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: 70 |
-解析
EMソフトウェア | 名称: SPIDER / カテゴリ: 3次元再構成 | ||||||||||||
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CTF補正 | 詳細: PHASE-FLIPPING EACH PARTICLE | ||||||||||||
対称性 | 点対称性: I (正20面体型対称) | ||||||||||||
3次元再構成 | 手法: ICOSAHEDRAL / 解像度: 11.5 Å / 粒子像の数: 18681 / ピクセルサイズ(公称値): 1.4 Å / ピクセルサイズ(実測値): 1.323 Å 詳細: SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-1863. (DEPOSITION ID: 7817). 対称性のタイプ: POINT | ||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT / 空間: REAL / 詳細: METHOD--RIGID-BODY FIT REFINEMENT PROTOCOL--X-RAY | ||||||||||||
精密化 | 最高解像度: 11.5 Å | ||||||||||||
精密化ステップ | サイクル: LAST / 最高解像度: 11.5 Å
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