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基本情報
登録情報 | データベース: PDB / ID: 8a5t | ||||||||||||||||||
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タイトル | Capsid structure of the L-A helper virus from native viral communities | ||||||||||||||||||
![]() | Major capsid protein | ||||||||||||||||||
![]() | VIRUS / Capsid structure ScVLA / viral particle / wildtype / endogenous | ||||||||||||||||||
機能・相同性 | Major coat protein, L-A virus / L-A virus major coat protein superfamily / L-A virus, major coat protein / viral capsid / Major capsid protein![]() | ||||||||||||||||||
生物種 | ![]() ![]() | ||||||||||||||||||
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: 3.78 Å | ||||||||||||||||||
![]() | Schmidt, L. / Tueting, C. / Stubbs, M.T. / Kastritis, P.L. | ||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Delineating organizational principles of the endogenous L-A virus by cryo-EM and computational analysis of native cell extracts. 著者: Lisa Schmidt / Christian Tüting / Fotis L Kyrilis / Farzad Hamdi / Dmitry A Semchonok / Gerd Hause / Annette Meister / Christian Ihling / Milton T Stubbs / Andrea Sinz / Panagiotis L Kastritis / ![]() ![]() 要旨: The high abundance of most viruses in infected host cells benefits their structural characterization. However, endogenous viruses are present in low copy numbers and are therefore challenging to ...The high abundance of most viruses in infected host cells benefits their structural characterization. However, endogenous viruses are present in low copy numbers and are therefore challenging to investigate. Here, we retrieve cell extracts enriched with an endogenous virus, the yeast L-A virus. The determined cryo-EM structure discloses capsid-stabilizing cation-π stacking, widespread across viruses and within the Totiviridae, and an interplay of non-covalent interactions from ten distinct capsomere interfaces. The capsid-embedded mRNA decapping active site trench is supported by a constricting movement of two flexible opposite-facing loops. tRNA-loaded polysomes and other biomacromolecules, presumably mRNA, are found in virus proximity within the cell extract. Mature viruses participate in larger viral communities resembling their rare in-cell equivalents in terms of size, composition, and inter-virus distances. Our results collectively describe a 3D-architecture of a viral milieu, opening the door to cell-extract-based high-resolution structural virology. #1: ![]() タイトル: Delineating organizational principles of the endogenous L-A virus by cryo-EM and computational analysis of native cell extracts. 著者: Lisa Schmidt / Christian Tüting / Fotis L Kyrilis / Farzad Hamdi / Dmitry A Semchonok / Gerd Hause / Annette Meister / Christian Ihling / Milton T Stubbs / Andrea Sinz / Panagiotis L Kastritis / ![]() ![]() 要旨: The high abundance of most viruses in infected host cells benefits their structural characterization. However, endogenous viruses are present in low copy numbers and are therefore challenging to ...The high abundance of most viruses in infected host cells benefits their structural characterization. However, endogenous viruses are present in low copy numbers and are therefore challenging to investigate. Here, we retrieve cell extracts enriched with an endogenous virus, the yeast L-A virus. The determined cryo-EM structure discloses capsid-stabilizing cation-π stacking, widespread across viruses and within the Totiviridae, and an interplay of non-covalent interactions from ten distinct capsomere interfaces. The capsid-embedded mRNA decapping active site trench is supported by a constricting movement of two flexible opposite-facing loops. tRNA-loaded polysomes and other biomacromolecules, presumably mRNA, are found in virus proximity within the cell extract. Mature viruses participate in larger viral communities resembling their rare in-cell equivalents in terms of size, composition, and inter-virus distances. Our results collectively describe a 3D-architecture of a viral milieu, opening the door to cell-extract-based high-resolution structural virology. #2: ![]() タイトル: Delineating organizational principles of the endogenous L-A virus by cryo-EM and computational analysis of native cell extracts 著者: Schmidt, L. / Tuting, C. / Kyrilis, F.L. / Hamdi, F. / Semchonok, D.A. / Hause, G. / Meister, A. / Ihling, C. / Shah, P.N.M. / Stubbs, M.T. / Sinz, A. / Stuart, D.I. / Kastritis, P.L. | ||||||||||||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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PDBx/mmCIF形式 | ![]() | 233.9 KB | 表示 | ![]() |
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PDB形式 | ![]() | 190.7 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 1.4 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.4 MB | 表示 | |
XML形式データ | ![]() | 56.6 KB | 表示 | |
CIF形式データ | ![]() | 81.8 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 15189MC ![]() 8pe4C M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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リンク
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 76070.031 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
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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 |
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試料調製
構成要素 | 名称: Saccharomyces cerevisiae virus L-A / タイプ: VIRUS / Entity ID: all / 由来: NATURAL |
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分子量 | 実験値: NO |
由来(天然) | 生物種: ![]() |
ウイルスについての詳細 | 中空か: NO / エンベロープを持つか: NO / 単離: SPECIES / タイプ: VIRUS-LIKE PARTICLE |
天然宿主 | 生物種: Saccharomyces cerevisiae |
緩衝液 | pH: 7.4 詳細: pH of the buffer was adjusted with NaOH buffer was filtered and sonicated |
緩衝液成分 | 濃度: 200 mM / 名称: Ammoniumacetate / 式: CH3COONH4 |
試料 | 濃度: 0.3 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: heterogenous cell extract |
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: Quantifoil R2/1 |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 95 % / 凍結前の試料温度: 277.15 K / 詳細: blot force 2 and blot time 6 s before plunging |
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電子顕微鏡撮影
顕微鏡 | モデル: TFS GLACIOS |
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電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 92000 X / 倍率(補正後): 89297 X / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 2.7 mm / C2レンズ絞り径: 70 µm / アライメント法: ZEMLIN TABLEAU |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER 最高温度: 118 K / 最低温度: 77 K |
撮影 | 平均露光時間: 3.61 sec. / 電子線照射量: 30 e/Å2 / 検出モード: INTEGRATING フィルム・検出器のモデル: FEI FALCON III (4k x 4k) 撮影したグリッド数: 2 / 実像数: 7020 |
画像スキャン | サンプリングサイズ: 14 µm / 横: 4096 / 縦: 4096 |
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解析
EMソフトウェア |
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CTF補正 | タイプ: NONE | |||||||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 2725140 | |||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.78 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 1020420 / 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: The initial model was rigid-fitted by ChimeraX and refined by iterative cycles of Coot and PHENIX. | |||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 1M1C Accession code: 1M1C / Source name: PDB / タイプ: experimental model |