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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: EMDB / ID: EMD-6637 | |||||||||
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タイトル | The novel asymmetric entry intermediate of a picornavirus captured with nanodiscs | |||||||||
![]() | Icosahedral reconstruction of CVB3 A-particle (sharpened) | |||||||||
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![]() | Picornavirus / entry intermediate | |||||||||
機能・相同性 | ![]() RNA-protein covalent cross-linking / : / : / 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 MDA-5 activity / picornain 2A / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / symbiont-mediated suppression of host mRNA export from nucleus / symbiont genome entry into host cell via pore formation in plasma membrane / picornain 3C ...RNA-protein covalent cross-linking / : / : / 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 MDA-5 activity / picornain 2A / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / symbiont-mediated suppression of host mRNA export from nucleus / symbiont genome entry into host cell via pore formation in plasma membrane / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / cytoplasmic vesicle membrane / endocytosis involved in viral entry into host cell / nucleoside-triphosphate phosphatase / protein complex oligomerization / monoatomic ion channel activity / symbiont-mediated suppression of host gene expression / DNA replication / RNA helicase activity / induction by virus of host autophagy / RNA-directed RNA polymerase / viral RNA genome replication / cysteine-type endopeptidase activity / RNA-dependent RNA polymerase activity / virus-mediated perturbation of host defense response / DNA-templated transcription / host cell nucleus / virion attachment to host cell / structural molecule activity / ATP hydrolysis activity / proteolysis / RNA binding / ATP binding / membrane / nucleus / metal ion binding 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.9 Å | |||||||||
![]() | Lee H / Shingler KL / Organtini LJ / Ashley RE / Makhov AM / Conway JF / Hafenstein S | |||||||||
![]() | ![]() タイトル: The novel asymmetric entry intermediate of a picornavirus captured with nanodiscs. 著者: Hyunwook Lee / Kristin L Shingler / Lindsey J Organtini / Robert E Ashley / Alexander M Makhov / James F Conway / Susan Hafenstein / ![]() 要旨: Many nonenveloped viruses engage host receptors that initiate capsid conformational changes necessary for genome release. Structural studies on the mechanisms of picornavirus entry have relied on in ...Many nonenveloped viruses engage host receptors that initiate capsid conformational changes necessary for genome release. Structural studies on the mechanisms of picornavirus entry have relied on in vitro approaches of virus incubated at high temperatures or with excess receptor molecules to trigger the entry intermediate or A-particle. We have induced the coxsackievirus B3 entry intermediate by triggering the virus with full-length receptors embedded in lipid bilayer nanodiscs. These asymmetrically formed A-particles were reconstructed using cryo-electron microscopy and a direct electron detector. These first high-resolution structures of a picornavirus entry intermediate captured at a membrane with and without imposing icosahedral symmetry (3.9 and 7.8 Å, respectively) revealed a novel A-particle that is markedly different from the classical A-particles. The asymmetric receptor binding triggers minimal global capsid expansion but marked local conformational changes at the site of receptor interaction. In addition, viral proteins extrude from the capsid only at the site of extensive protein remodeling adjacent to the nanodisc. Thus, the binding of the receptor triggers formation of a unique site in preparation for genome release. | |||||||||
履歴 |
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構造の表示
ムービー |
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構造ビューア | EMマップ: ![]() ![]() ![]() |
添付画像 |
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ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 223.2 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 10.1 KB 10.1 KB | 表示 表示 | ![]() |
画像 | ![]() | 1.2 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-検証レポート
文書・要旨 | ![]() | 361.9 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 361.4 KB | 表示 | |
XML形式データ | ![]() | 7.2 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Icosahedral reconstruction of CVB3 A-particle (sharpened) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.37 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
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試料の構成要素
-全体 : Locally-stimulated A-particle of CVB3
全体 | 名称: Locally-stimulated A-particle of CVB3 |
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要素 |
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-超分子 #1000: Locally-stimulated A-particle of CVB3
超分子 | 名称: Locally-stimulated A-particle of CVB3 / タイプ: sample / ID: 1000 / Number unique components: 1 |
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-超分子 #1: Human coxsackievirus B3
超分子 | 名称: Human coxsackievirus B3 / タイプ: virus / ID: 1 詳細: CAR-nanodisc was incubated with the virus sample at 37 degrees Celsius for 30 minutes. NCBI-ID: 12072 / 生物種: Human coxsackievirus B3 / Sci species strain: 28 / データベース: NCBI / ウイルスタイプ: VIRION / ウイルス・単離状態: STRAIN / ウイルス・エンベロープ: No / ウイルス・中空状態: No |
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宿主 | 生物種: ![]() |
ウイルス殻 | Shell ID: 1 / 名称: VP1-4 / 直径: 300 Å / T番号(三角分割数): 1 |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
濃度 | 1.0 mg/mL |
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凍結 | 凍結剤: ETHANE / チャンバー内湿度: 90 % / チャンバー内温度: 102 K / 装置: GATAN CRYOPLUNGE 3 |
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電子顕微鏡法
顕微鏡 | FEI POLARA 300 |
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日付 | 2014年11月21日 |
撮影 | カテゴリ: CCD フィルム・検出器のモデル: FEI FALCON II (4k x 4k) 実像数: 9685 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.0 mm / 最大 デフォーカス(公称値): 5.875 µm / 最小 デフォーカス(公称値): 1.362 µm |
試料ステージ | 試料ホルダーモデル: SIDE ENTRY, EUCENTRIC |
実験機器 | ![]() モデル: Tecnai Polara / 画像提供: FEI Company |
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画像解析
CTF補正 | 詳細: Each particle |
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最終 再構成 | 解像度のタイプ: BY AUTHOR / 解像度: 3.9 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: RELION / 使用した粒子像数: 57203 |