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基本情報
登録情報 | データベース: PDB / ID: 3iya | ||||||
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タイトル | Association of the pr peptides with dengue virus blocks membrane fusion at acidic pH | ||||||
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![]() | VIRUS / prM / E / Icosahedral virus | ||||||
機能・相同性 | ![]() flavivirin / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host TYK2 activity / host cell mitochondrion / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT2 activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / viral capsid / double-stranded RNA binding / nucleoside-triphosphate phosphatase / channel activity / viral nucleocapsid ...flavivirin / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host TYK2 activity / host cell mitochondrion / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT2 activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / viral capsid / double-stranded RNA binding / nucleoside-triphosphate phosphatase / channel activity / viral nucleocapsid / monoatomic ion transmembrane transport / mRNA (guanine-N7)-methyltransferase / methyltransferase cap1 / clathrin-dependent endocytosis of virus by host cell / methyltransferase cap1 activity / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / RNA helicase activity / protein dimerization activity / host cell perinuclear region of cytoplasm / host cell endoplasmic reticulum membrane / symbiont-mediated suppression of host innate immune response / RNA helicase / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / symbiont-mediated activation of host autophagy / serine-type endopeptidase activity / RNA-directed RNA polymerase / viral RNA genome replication / RNA-directed RNA polymerase activity / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / host cell nucleus / virion membrane / structural molecule activity / ATP hydrolysis activity / proteolysis / extracellular region / ATP binding / metal ion binding / membrane 類似検索 - 分子機能 | ||||||
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: 22 Å | ||||||
![]() | Yu, I. / Holdaway, H.A. / Chipman, P.R. / Kuhn, R.J. / Rossmann, M.G. / Chen, J. | ||||||
![]() | ![]() タイトル: Association of the pr peptides with dengue virus at acidic pH blocks membrane fusion. 著者: I-M Yu / H A Holdaway / P R Chipman / R J Kuhn / M G Rossmann / J Chen / ![]() 要旨: Flavivirus assembles into an inert particle that requires proteolytic activation by furin to enable transmission to other hosts. We previously showed that immature virus undergoes a conformational ...Flavivirus assembles into an inert particle that requires proteolytic activation by furin to enable transmission to other hosts. We previously showed that immature virus undergoes a conformational change at low pH that renders it accessible to furin (I. M. Yu, W. Zhang, H. A. Holdaway, L. Li, V. A. Kostyuchenko, P. R. Chipman, R. J. Kuhn, M. G. Rossmann, and J. Chen, Science 319:1834-1837, 2008). Here we show, using cryoelectron microscopy, that the structure of immature dengue virus at pH 6.0 is essentially the same before and after the cleavage of prM. The structure shows that after cleavage, the proteolytic product pr remains associated with the virion at acidic pH, and that furin cleavage by itself does not induce any major conformational changes. We also show by liposome cofloatation experiments that pr retention prevents membrane insertion, suggesting that pr is present on the virion in the trans-Golgi network to protect the progeny virus from fusion within the host cell. | ||||||
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構造の表示
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構造ビューア | 分子: ![]() ![]() |
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-検証レポート
文書・要旨 | ![]() | 744.4 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 745.5 KB | 表示 | |
XML形式データ | ![]() | 22.8 KB | 表示 | |
CIF形式データ | ![]() | 33.6 KB | 表示 | |
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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
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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)) |
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要素
#1: タンパク質 | 分子量: 43904.410 Da / 分子数: 3 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 細胞株 (発現宿主): C6/36 mosquito cells / 発現宿主: ![]() ![]() #2: タンパク質 | 分子量: 9261.531 Da / 分子数: 3 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 細胞株 (発現宿主): C6/36 mosquito cells / 発現宿主: ![]() ![]() |
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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 |
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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: YES / ホストのカテゴリ: VERTEBRATES / 単離: STRAIN / タイプ: VIRION | |||||||||||||||
ウイルス殻 | 三角数 (T数): 3 | |||||||||||||||
緩衝液 | pH: 6 / 詳細: 6 mM Tris-HCL 25 mM MES 120 mM NaCl 1 mM EDTA | |||||||||||||||
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: 6 mM Tris-HCL 25 mM MES 120 mM NaCl 1 mM EDTA | |||||||||||||||
急速凍結 | 凍結剤: ETHANE 手法: A small vial of ethane is placed inside a larger liquid nitrogen reservoir. The grid holding a few microliters of the sample is held in place at the bottom of a plunger by the means of fine ...手法: A small vial of ethane is placed inside a larger liquid nitrogen reservoir. The grid holding a few microliters of the sample is held in place at the bottom of a plunger by the means of fine tweezers. Once the ethane in the vial is completely frozen, it needs to be slightly melted. When the liquid ethane is ready, a piece of filter paper is then pressed against the sample to blot of excess buffer, sufficient to leave a thin layer on the grid. After a predetermined time, the filter paper is removed, and the plunger is allowed to drop into the liquid ethane. Once the grid enters the liquid ethane, the sample is rapidly frozen, and the grid is transferred under liquid nitrogen to a storage box immersed liquid nitrogen for later use in the microscope. |
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電子顕微鏡撮影
顕微鏡 | モデル: FEI/PHILIPS CM200FEG / 日付: 2008年6月13日 |
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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): 50000 X / 最大 デフォーカス(公称値): 3800 nm / 最小 デフォーカス(公称値): 1800 nm / カメラ長: 0 mm |
試料ホルダ | 試料ホルダーモデル: GATAN LIQUID NITROGEN / 資料ホルダタイプ: Eucentric / 傾斜角・最大: 0 ° / 傾斜角・最小: 0 ° |
撮影 | 電子線照射量: 25 e/Å2 / フィルム・検出器のモデル: GATAN MULTISCAN |
画像スキャン | デジタル画像の数: 45 |
放射 | プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray |
放射波長 | 相対比: 1 |
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解析
EMソフトウェア |
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CTF補正 | 詳細: Each particle | ||||||||||||
対称性 | 点対称性: I (正20面体型対称) | ||||||||||||
3次元再構成 | 解像度: 22 Å / 解像度の算出法: FSC 0.5 CUT-OFF / 粒子像の数: 635 / 対称性のタイプ: POINT | ||||||||||||
原子モデル構築 | 空間: REAL / Target criteria: density match | ||||||||||||
原子モデル構築 | PDB-ID: 3C5X Accession code: 3C5X / Source name: PDB / タイプ: experimental model | ||||||||||||
精密化ステップ | サイクル: LAST
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