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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: 9eac | ||||||
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| タイトル | Seneca valley virus Empty rotated particle at acidic condition (ER-particle[C]) | ||||||
要素 |
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キーワード | VIRUS / SVV / Capsid / Physiological condition / Non-enterovirus / A-particle / Altered particle / genome release / capsid uncoating / Seneca Valley virus / Senecavirus / Oncolytic virus | ||||||
| 機能・相同性 | 機能・相同性情報symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF7 activity / host cell nucleolus / adhesion receptor-mediated virion attachment to host cell / symbiont-mediated suppression of host TRAF-mediated signal transduction / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of RIG-I activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / channel activity ...symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF7 activity / host cell nucleolus / adhesion receptor-mediated virion attachment to host cell / symbiont-mediated suppression of host TRAF-mediated signal transduction / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of RIG-I activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / channel activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / monoatomic ion transmembrane transport / symbiont-mediated suppression of host toll-like receptor signaling pathway / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF3 activity / ubiquitinyl hydrolase 1 / entry receptor-mediated virion attachment to host cell / cysteine-type deubiquitinase activity / RNA helicase activity / RNA helicase / RNA-directed RNA polymerase / cysteine-type endopeptidase activity / viral RNA genome replication / RNA-directed RNA polymerase activity / DNA-templated transcription / symbiont entry into host cell / structural molecule activity / ATP hydrolysis activity / proteolysis / RNA binding / ATP binding / membrane 類似検索 - 分子機能 | ||||||
| 生物種 | Seneca Valley virus USA/SSV-001 (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: 4.27 Å | ||||||
データ登録者 | Kumaran, R. / Bostina, M. | ||||||
| 資金援助 | 1件
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引用 | ジャーナル: J Virol / 年: 2025タイトル: Cryo-EM structure of the Seneca Valley virus A-particle and related structural states. 著者: Rosheny Kumaran / Nadishka Jayawardena / Kuan-Lin Chen / Alice-Roza Eruera / James Hodgkinson-Bean / Laura N Burga / Matthias Wolf / Mihnea Bostina / ![]() 要旨: Picornavirus cell entry requires a series of capsid protein conformational changes leading to genome uncoating. For enteroviruses, receptor binding triggers the transition from a full (F) capsid to ...Picornavirus cell entry requires a series of capsid protein conformational changes leading to genome uncoating. For enteroviruses, receptor binding triggers the transition from a full (F) capsid to an altered (A) particle before releasing its genome and finally converting it into an empty (E) particle. In contrast, non-enteroviruses, such as Aphthovirus, Cardiovirus, or Seneca Valley virus, release their genomes by dissociating the capsid into pentamers. While the existence of a transient A-particle for non-enteroviruses was previously speculated, it has never been directly observed using structural methods. Seneca Valley virus (SVV) is an oncolytic picornavirus that selectively targets cancer cells by recognizing Tumor endothelial marker 8 (TEM8) as the host receptor. SVV disassembles into pentamers at acidic pH, suggesting that the acidic environment of the endosome could cause capsid disassembly. We used cryo-electron microscopy to investigate SVV under acidic conditions and in complex with TEM8 at physiological pH, identifying multiple uncoating intermediates. These include an altered-particle, an empty-rotated particle (E), and a series of open particles expelling the coiled genome. The A-particle is expanded, displays reduced interactions between capsid proteins, a reorganized genome, and has a poorly resolved VP1 N-terminus, VP2 N-terminus, and VP4. The E particle has rotated pentamers, reduced contacts within the particle, lacks the genome, VP1 and VP2 N-termini, and VP4. Our work provides an understanding of transient SVV structural states and supports the existence of an intermediate SVV A-particle. These findings could help optimize SVV for oncolytic therapy.IMPORTANCESeneca Valley virus (SVV) is a non-enterovirus picornavirus with specific tumor tropism mediated by the receptor Tumor endothelial marker 8, also known as Anthrax toxin receptor 1. Using cryo-electron microscopy, it was possible to identify multiple structural states of SVV. We demonstrate that SVV capsids transition from full particles to altered (A) particles and then to empty-rotated (E) particles, with receptor binding and acidic pH driving these conformational changes, respectively. This study also identifies open particles with expelled genomes. Comparisons between A- and E-particles reveal that peptide segments of VP1, VP2, and VP4 could potentially play a role in genome delivery. Future work can explore the formation of these structural states . | ||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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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 | 9eac.cif.gz | 202.4 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9eac.ent.gz | 158.2 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9eac.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
| 文書・要旨 | 9eac_validation.pdf.gz | 1.7 MB | 表示 | wwPDB検証レポート |
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| 文書・詳細版 | 9eac_full_validation.pdf.gz | 1.7 MB | 表示 | |
| XML形式データ | 9eac_validation.xml.gz | 31.9 KB | 表示 | |
| CIF形式データ | 9eac_validation.cif.gz | 45.2 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/ea/9eac ftp://data.pdbj.org/pub/pdb/validation_reports/ea/9eac | HTTPS FTP |
-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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| 1 | x 60![]()
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要素
| #1: タンパク質 | 分子量: 25751.248 Da / 分子数: 1 / 由来タイプ: 天然 由来: (天然) Seneca Valley virus USA/SSV-001 (ウイルス)参照: UniProt: Q155Z9 |
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| #2: タンパク質 | 分子量: 26353.938 Da / 分子数: 1 / 由来タイプ: 天然 由来: (天然) Seneca Valley virus USA/SSV-001 (ウイルス)参照: UniProt: Q155Z9 |
| #3: タンパク質 | 分子量: 24524.602 Da / 分子数: 1 / 由来タイプ: 天然 由来: (天然) Seneca Valley virus USA/SSV-001 (ウイルス)参照: UniProt: Q155Z9 |
| #4: 化合物 | ChemComp-CA / |
| 研究の焦点であるリガンドがあるか | Y |
| Has protein modification | N |
-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: Seneca Valley virus USA/SSV-001 / タイプ: VIRUS / Entity ID: #1-#3 / 由来: NATURAL |
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| 分子量 | 実験値: NO |
| 由来(天然) | 生物種: Seneca Valley virus USA/SSV-001 (ウイルス) |
| ウイルスについての詳細 | 中空か: YES / エンベロープを持つか: NO / 単離: STRAIN / タイプ: VIRION |
| 緩衝液 | pH: 5 |
| 試料 | 濃度: 0.25 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES 詳細: SVV was incubated at pH 5 for 1 hour. Then, a ratio of 600 receptor particles per capsid was added to the incubated sample. The virus-receptor mixture was incubated at 37 degrees C for 90 ...詳細: SVV was incubated at pH 5 for 1 hour. Then, a ratio of 600 receptor particles per capsid was added to the incubated sample. The virus-receptor mixture was incubated at 37 degrees C for 90 minutes. The sample was kept at 37 degrees C until the plunge freezing of cryo-EM grids. |
| 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: 310.15 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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: SPOT SCAN |
| 電子レンズ | モード: OTHER / 最大 デフォーカス(公称値): 1500 nm / 最小 デフォーカス(公称値): 400 nm / Cs: 2.7 mm |
| 撮影 | 電子線照射量: 40 e/Å2 フィルム・検出器のモデル: FEI FALCON III (4k x 4k) |
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解析
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||||||||
| 対称性 | 点対称性: I (正20面体型対称) | ||||||||||||||||||||||||||||||||||||||||||||||||||
| 3次元再構成 | 解像度: 4.27 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 242 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||||
| 原子モデル構築 | プロトコル: AB INITIO MODEL | ||||||||||||||||||||||||||||||||||||||||||||||||||
| 原子モデル構築 | 3D fitting-ID: 1 / Accession code: 3cji / Initial refinement model-ID: 1 / PDB-ID: 3cji / Source name: PDB / タイプ: experimental model
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| 拘束条件 |
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万見について




Seneca Valley virus USA/SSV-001 (ウイルス)
引用








PDBj





FIELD EMISSION GUN
