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基本情報
登録情報 | データベース: PDB / ID: 8t12 | ||||||
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タイトル | Cryo-EM structure of DENV2 NS5 in complex with human STAT2 with the N-terminal domain of STAT2 ordered. | ||||||
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![]() | IMMUNE SYSTEM/VIRAL PROTEIN / complex / IMMUNE SYSTEM-VIRAL PROTEIN complex | ||||||
機能・相同性 | ![]() ISGF3 complex / Interleukin-20 family signaling / negative regulation of type I interferon-mediated signaling pathway / type I interferon-mediated signaling pathway / regulation of mitochondrial fission / ubiquitin-like protein ligase binding / Regulation of IFNA/IFNB signaling / regulation of protein phosphorylation / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host TYK2 activity / cell surface receptor signaling pathway via JAK-STAT ...ISGF3 complex / Interleukin-20 family signaling / negative regulation of type I interferon-mediated signaling pathway / type I interferon-mediated signaling pathway / regulation of mitochondrial fission / ubiquitin-like protein ligase binding / Regulation of IFNA/IFNB signaling / regulation of protein phosphorylation / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host TYK2 activity / cell surface receptor signaling pathway via JAK-STAT / 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 / defense response / Evasion by RSV of host interferon responses / response to peptide hormone / RNA polymerase II transcription regulator complex / Interferon alpha/beta signaling / viral capsid / double-stranded RNA binding / regulation of cell population proliferation / channel activity / monoatomic ion transmembrane transport / defense response to virus / clathrin-dependent endocytosis of virus by host cell / Potential therapeutics for SARS / methyltransferase cap1 activity / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / DNA-binding transcription factor activity, RNA polymerase II-specific / RNA helicase activity / protein dimerization activity / host cell endoplasmic reticulum membrane / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / RNA polymerase II cis-regulatory region sequence-specific DNA binding / DNA-binding transcription factor activity / 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 / regulation of transcription by RNA polymerase II / chromatin / virion attachment to host cell / host cell nucleus / SARS-CoV-2 activates/modulates innate and adaptive immune responses / virion membrane / structural molecule activity / positive regulation of transcription by RNA polymerase II / proteolysis / extracellular region / nucleoplasm / ATP binding / metal ion binding / identical protein binding / nucleus / membrane / plasma membrane / cytosol / cytoplasm 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: 3.34 Å | ||||||
![]() | Biswal, M. / Lu, J. / Song, J. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: A conformational selection mechanism of flavivirus NS5 for species-specific STAT2 inhibition. 著者: Mahamaya Biswal / Wangyuan Yao / Jiuwei Lu / Jianbin Chen / Juliet Morrison / Rong Hai / Jikui Song / ![]() 要旨: Flaviviruses, including Zika virus (ZIKV) and Dengue virus (DENV), rely on their non-structural protein 5 (NS5) for both replication of viral genome and suppression of host IFN signaling. DENV and ...Flaviviruses, including Zika virus (ZIKV) and Dengue virus (DENV), rely on their non-structural protein 5 (NS5) for both replication of viral genome and suppression of host IFN signaling. DENV and ZIKV NS5s were shown to facilitate proteosome-mediated protein degradation of human STAT2 (hSTAT2). However, how flavivirus NS5s have evolved for species-specific IFN-suppression remains unclear. Here we report structure-function characterization of the DENV serotype 2 (DENV2) NS5-hSTAT2 complex. The MTase and RdRP domains of DENV2 NS5 form an extended conformation to interact with the coiled-coil and N-terminal domains of hSTAT2, thereby promoting hSTAT2 degradation in cells. Disruption of the extended conformation of DENV2/ZIKV NS5, but not the alternative compact state, impaired their hSTAT2 binding. Our comparative structural analysis of flavivirus NS5s further reveals a conserved protein-interaction platform with subtle amino-acid variations likely underpinning diverse IFN-suppression mechanisms. Together, this study uncovers a conformational selection mechanism underlying species-specific hSTAT2 inhibition by flavivirus NS5. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 284.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 222.3 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.2 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.2 MB | 表示 | |
XML形式データ | ![]() | 49.3 KB | 表示 | |
CIF形式データ | ![]() | 72.2 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 40952MC ![]() 8t13C M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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リンク
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 98025.031 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() | ||
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#2: タンパク質 | 分子量: 103264.656 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 発現宿主: ![]() ![]() | ||
#3: 化合物 | 研究の焦点であるリガンドがあるか | Y | |
-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: complex of DENV2 NS5 and huamn STAT2 / タイプ: COMPLEX / Entity ID: #1-#2 / 由来: MULTIPLE SOURCES | ||||||||||||
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由来(天然) |
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由来(組換発現) | 生物種: ![]() ![]() | ||||||||||||
緩衝液 | pH: 7.5 | ||||||||||||
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 / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1000 nm |
撮影 | 電子線照射量: 50 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3次元再構成 | 解像度: 3.34 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 99938 / 対称性のタイプ: POINT |