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基本情報
登録情報 | データベース: PDB / ID: 6idi | |||||||||||||||
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タイトル | Cryo-EM structure of Immature Dengue virus serotype 3 in complex with human antibody 1H10 Fab at pH 8.0. | |||||||||||||||
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![]() | VIRUS / immature dengue virus / human antibody | |||||||||||||||
機能・相同性 | ![]() : / 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 / ribonucleoside triphosphate phosphatase activity / viral capsid / double-stranded RNA binding / channel activity / monoatomic ion transmembrane transport ...: / 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 / ribonucleoside triphosphate phosphatase activity / viral capsid / double-stranded RNA binding / channel activity / monoatomic ion transmembrane transport / 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 endoplasmic reticulum membrane / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / symbiont-mediated activation of host autophagy / serine-type endopeptidase activity / 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 / 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: 12 Å | |||||||||||||||
![]() | Wirawan, M. / Fibriansah, G. / Ng, T.S. / Zhang, Q. / Kostyuchenko, V.A. / Shi, J. / Lok, S.M. | |||||||||||||||
資金援助 | ![]() ![]()
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![]() | ![]() タイトル: Mechanism of Enhanced Immature Dengue Virus Attachment to Endosomal Membrane Induced by prM Antibody. 著者: Melissa Wirawan / Guntur Fibriansah / Jan K Marzinek / Xin Xiang Lim / Thiam-Seng Ng / Adelene Y L Sim / Qian Zhang / Victor A Kostyuchenko / Jian Shi / Scott A Smith / Chandra S Verma / ...著者: Melissa Wirawan / Guntur Fibriansah / Jan K Marzinek / Xin Xiang Lim / Thiam-Seng Ng / Adelene Y L Sim / Qian Zhang / Victor A Kostyuchenko / Jian Shi / Scott A Smith / Chandra S Verma / Ganesh Anand / James E Crowe / Peter J Bond / Shee-Mei Lok / ![]() ![]() 要旨: Dengue virus (DENV) particles are released from cells in different maturation states. Fully immature DENV (immDENV) is generally non-infectious, but can become infectious when complexed with anti- ...Dengue virus (DENV) particles are released from cells in different maturation states. Fully immature DENV (immDENV) is generally non-infectious, but can become infectious when complexed with anti-precursor membrane (prM) protein antibodies. It is unknown how anti-prM antibody-coated particles can undergo membrane fusion since the prM caps the envelope (E) protein fusion loop. Here, we determined cryoelectron microscopy (cryo-EM) maps of the immDENV:anti-prM complex at different pH values, mimicking the extracellular (pH 8.0) or endosomal (pH 5.0) environments. At pH 5.0, there are two structural classes with fewer antibodies bound than at pH 8.0. These classes may represent different maturation states. Molecular simulations, together with the measured high-affinity pr:antibody interaction (versus the weak pr:E interaction) and also the low pH cryo-EM structures, suggest how antibody:pr complex can dislodge from the E protein at low pH. This exposes the E protein fusion loop enhancing virus interaction with endosomes. | |||||||||||||||
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構造の表示
ムービー |
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構造ビューア | 分子: ![]() ![]() |
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その他 | ![]() |
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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: 53682.484 Da / 分子数: 3 / 由来タイプ: 組換発現 / 詳細: isolated from dengue patient 由来: (組換発現) ![]() 細胞株 (発現宿主): C6/36 / 発現宿主: ![]() ![]() #2: タンパク質 | 分子量: 18686.615 Da / 分子数: 3 / 由来タイプ: 組換発現 / 詳細: isolated from dengue patient 由来: (組換発現) ![]() 細胞株 (発現宿主): C6/36 / 発現宿主: ![]() ![]() #3: 抗体 | 分子量: 15319.042 Da / 分子数: 3 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() #4: 抗体 | 分子量: 12132.362 Da / 分子数: 3 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 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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分子量 | 単位: MEGADALTONS / 実験値: NO | |||||||||||||||||||||||||||||||||||
由来(天然) |
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由来(組換発現) |
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ウイルスについての詳細 |
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緩衝液 | pH: 8 | |||||||||||||||||||||||||||||||||||
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | |||||||||||||||||||||||||||||||||||
急速凍結 | 凍結剤: ETHANE |
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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: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / Cs: 2.7 mm |
撮影 | 電子線照射量: 18 e/Å2 フィルム・検出器のモデル: FEI FALCON II (4k x 4k) |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING ONLY | |||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 9193 | |||||||||||||||||||||
対称性 | 点対称性: I (正20面体型対称) | |||||||||||||||||||||
3次元再構成 | 解像度: 12 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 2886 / 対称性のタイプ: POINT | |||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT | |||||||||||||||||||||
原子モデル構築 | PDB-ID: 4B03 Accession code: 4B03 / Source name: PDB / タイプ: experimental model |