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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 8vb4 | ||||||
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タイトル | C12 portal and adaptor complex of the mature bacteriophage PhiM1 particle | ||||||
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![]() | VIRAL PROTEIN / portal / bacteriophage / phage / phage portal / portal complex / adaptor protein / portal adaptor complex / podophage / autographiviridae | ||||||
機能・相同性 | Tail tubular protein Gp11 / Tail tubular protein / Head-to-tail connector protein, podovirus-type / Bacteriophage head to tail connecting protein / symbiont genome ejection through host cell envelope, short tail mechanism / virion component / Putative tail tubular protein A / Putative head-tail connector 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: 2.98 Å | ||||||
![]() | Hodgkinson-Bean, J. / Eruera, A. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Ejectosome of bacteriophage ΦM1. 著者: Alice-Roza Eruera / James Hodgkinson-Bean / Georgia L Rutter / Francesca R Hills / Rosheny Kumaran / Alexander J M Crowe / Nickhil Jadav / Fangfang Chang / Klemens McJarrow-Keller / Fátima ...著者: Alice-Roza Eruera / James Hodgkinson-Bean / Georgia L Rutter / Francesca R Hills / Rosheny Kumaran / Alexander J M Crowe / Nickhil Jadav / Fangfang Chang / Klemens McJarrow-Keller / Fátima Jorge / Jaekyung Hyun / Hyejin Kim / Bumhan Ryu / Mihnea Bostina / ![]() ![]() 要旨: Podophages that infect gram-negative bacteria, such as pathogen ΦM1, encode tail assemblies too short to extend across the complex gram-negative cell wall. To overcome this, podophages encode a ...Podophages that infect gram-negative bacteria, such as pathogen ΦM1, encode tail assemblies too short to extend across the complex gram-negative cell wall. To overcome this, podophages encode a large protein complex (ejectosome) packaged inside the viral capsid and correspondingly ejected during infection to form a transient channel that spans the periplasmic space. Here, we describe the ejectosome of bacteriophage ΦM1 to a resolution of 3.32 Å by single-particle cryo-electron microscopy (cryo-EM). The core consists of tetrameric and octameric ejection proteins which form a ∼1.5-MDa ejectosome that must transition through the ∼30 Å aperture created by the short tail nozzle assembly that acts as the conduit for the passage of DNA during infection. The ejectosome forms several grooves into which coils of genomic DNA are fit before the DNA sharply turns and goes down the tunnel and into the portal. In addition, we reconstructed the icosahedral capsid and hybrid tail apparatus to resolutions between 3.04 and 3.23 Å, and note an uncommon fold adopted by the dimerized decoration proteins which further emphasize the structural diversity of podophages. These reconstructions have allowed the generation of a complete atomic model of the ΦM1, uncovering two distinct decoration proteins and highlighting the exquisite structural diversity of tailed bacteriophages. | ||||||
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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ダウンロード
PDBx/mmCIF形式 | ![]() | 1.2 MB | 表示 | ![]() |
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PDB形式 | ![]() | 1.1 MB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
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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: 55668.926 Da / 分子数: 12 / 由来タイプ: 天然 / 由来: (天然) ![]() #2: タンパク質 | 分子量: 21075.852 Da / 分子数: 12 / 由来タイプ: 天然 / 由来: (天然) ![]() Has protein modification | N | |
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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: Pectobacterium phage PhiM1 / タイプ: VIRUS 詳細: Host Pectobacterium atrocepticum strain SCRI1043 bacteria were infected with WT Pectobacterium phage PhiM1. Sample was purified from overnight lysates. 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: VIRION |
天然宿主 | 生物種: Pectobacterium atrocepticum / 株: SCRI1043 |
ウイルス殻 | 名称: capsid / 直径: 635 nm / 三角数 (T数): 7 |
緩衝液 | pH: 7.4 詳細: 10 mM Tris HCl pH 7.4, 10 mM MgSO4 and 0.01% w/v gelatin |
試料 | 濃度: 20 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES 詳細: Sample had a tendency to sit at the edges of holes, or where ice was slightly thicker. |
試料支持 | 詳細: Negative hydrophilicity. / グリッドの材料: COPPER / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277.15 K |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: TFS KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 64000 X / 倍率(補正後): 36765 X / 最大 デフォーカス(公称値): 2400 nm / 最小 デフォーカス(公称値): 800 nm / Calibrated defocus min: 800 nm / 最大 デフォーカス(補正後): 2400 nm / Cs: 2.7 mm |
試料ホルダ | 凍結剤: NITROGEN |
撮影 | 平均露光時間: 12.02 sec. / 電子線照射量: 53.9 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 実像数: 4429 |
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解析
EMソフトウェア |
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CTF補正 | 詳細: Patch based CTF correction. / タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C12 (12回回転対称) | ||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 2.98 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 17729 / アルゴリズム: FOURIER SPACE / 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: Initial models were developed using AlphaFold-2, and were docked into EM maps. Models were then flexibly fit using chimeraX, followed by manual refinement using a combination of ISOLDE ...詳細: Initial models were developed using AlphaFold-2, and were docked into EM maps. Models were then flexibly fit using chimeraX, followed by manual refinement using a combination of ISOLDE (ChimeraX) and coot. Automatic refinements were performed in PHENIX real space refine. | ||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | Source name: AlphaFold / タイプ: in silico model |