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基本情報
登録情報 | データベース: PDB / ID: 4cbf | ||||||
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タイトル | Near-atomic resolution cryo-EM structure of Dengue serotype 4 virus | ||||||
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![]() | VIRUS / FLAVIVIRUS | ||||||
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 / viral life cycle / 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 / viral life cycle / 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: 4.1 Å | ||||||
Model type details | CA ATOMS ONLY, CHAIN C, A, E, B, D, F | ||||||
![]() | Kostyuchenko, V.A. / Chew, P.L. / Ng, T.S. / Lok, S.M. | ||||||
![]() | ![]() タイトル: Near-atomic resolution cryo-electron microscopic structure of dengue serotype 4 virus. 著者: Victor A Kostyuchenko / Pau Ling Chew / Thiam-Seng Ng / Shee-Mei Lok / ![]() 要旨: Dengue virus (DENV), a mosquito-borne virus, is responsible for millions of cases of infections worldwide. There are four DENV serotypes (DENV1 to -4). After a primary DENV infection, the antibodies ...Dengue virus (DENV), a mosquito-borne virus, is responsible for millions of cases of infections worldwide. There are four DENV serotypes (DENV1 to -4). After a primary DENV infection, the antibodies elicited confer lifetime protection against that DENV serotype. However, in a secondary infection with another serotype, the preexisting antibodies may cause antibody-dependent enhancement (ADE) of infection of macrophage cells, leading to the development of the more severe form of disease, dengue hemorrhagic fever. Thus, a safe vaccine should stimulate protection against all dengue serotypes simultaneously. To facilitate the development of a vaccine, good knowledge of different DENV serotype structures is crucial. Structures of DENV1 and DENV2 had been solved previously. Here we present a near-atomic resolution cryo-electron microscopy (cryo-EM) structure of mature DENV4. Comparison of the DENV4 structure with similar-resolution cryo-EM structures of DENV1 and DENV2 showed differences in surface charge distribution, which may explain their differences in binding to cellular receptors, such as heparin. Also, observed variations in amino acid residues involved in interactions between envelope and membrane proteins on the virus surface correlate with their ability to undergo structural changes at higher temperatures. | ||||||
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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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ダウンロードとリンク
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PDBx/mmCIF形式 | ![]() | 66.6 KB | 表示 | ![]() |
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PDB形式 | ![]() | 41.2 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
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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
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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: 54002.855 Da / 分子数: 3 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 株: THAILAND/NGS-C/1944 (DENV-2) / 細胞株 (発現宿主): C6/36 発現宿主: ![]() ![]() 参照: UniProt: E0WXI2 #2: タンパク質 | 分子量: 8242.602 Da / 分子数: 3 / 由来タイプ: 合成 / 由来: (合成) ![]() |
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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: MATURE DENGUE VIRUS SEROTYPE 4 / タイプ: VIRUS |
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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 |
試料支持 | 詳細: HOLEY CARBON |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 詳細: LIQUID 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 / 日付: 2012年4月14日 |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 125000 X / 倍率(補正後): 129629 X / 最大 デフォーカス(公称値): 3500 nm / 最小 デフォーカス(公称値): 500 nm / Cs: 2.7 mm |
試料ホルダ | 温度: 100 K |
撮影 | 電子線照射量: 18 e/Å2 フィルム・検出器のモデル: FEI FALCON I (4k x 4k) |
画像スキャン | デジタル画像の数: 716 |
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 | 手法: CROSS-COMMON LINES / 解像度: 4.1 Å / 粒子像の数: 16602 / ピクセルサイズ(公称値): 1.08 Å / ピクセルサイズ(実測値): 1.08 Å / 倍率補正: GRAPHITE SHEETS 詳細: MPSA SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2485. (DEPOSITION ID: 12027). 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 / Target criteria: REAL SPACE CORRELATION / 詳細: METHOD--FLEXIBLE REFINEMENT PROTOCOL--CRYO-EM | ||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 3J27 Accession code: 3J27 / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||||||
精密化 | 最高解像度: 4.1 Å | ||||||||||||||||||||||||||||
精密化ステップ | サイクル: LAST / 最高解像度: 4.1 Å
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