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基本情報
登録情報 | データベース: PDB / ID: 8r65 | ||||||||||||||||||||||||
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タイトル | 1918 H1N1 Viral polymerase heterotrimer in complex with 4 repeat serine-5 phosphorylated PolII peptide with ordered PB2 C-terminal domains | ||||||||||||||||||||||||
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![]() | VIRAL PROTEIN / influenza / polymerase / PolII-CTD | ||||||||||||||||||||||||
機能・相同性 | ![]() cap snatching / viral transcription / symbiont-mediated suppression of host mRNA transcription via inhibition of RNA polymerase II activity / 7-methylguanosine mRNA capping / host cell mitochondrion / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / virion component / endonuclease activity / 加水分解酵素; エステル加水分解酵素 / host cell cytoplasm ...cap snatching / viral transcription / symbiont-mediated suppression of host mRNA transcription via inhibition of RNA polymerase II activity / 7-methylguanosine mRNA capping / host cell mitochondrion / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / virion component / endonuclease activity / 加水分解酵素; エステル加水分解酵素 / host cell cytoplasm / symbiont-mediated suppression of host gene expression / viral translational frameshifting / RNA-directed RNA polymerase / viral RNA genome replication / RNA-directed RNA polymerase activity / nucleotide binding / DNA-templated transcription / host cell nucleus / RNA binding / metal ion binding 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: 4.23 Å | ||||||||||||||||||||||||
![]() | Keown, J.R. / Carrique, L. / Fodor, E. / Grimes, J.M. | ||||||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural and functional characterization of the interaction between the influenza A virus RNA polymerase and the CTD of host RNA polymerase II. 著者: Jeremy Keown / Alaa Baazaoui / Marek Šebesta / Richard Štefl / Loïc Carrique / Ervin Fodor / Jonathan M Grimes / ![]() 要旨: Influenza A viruses, causing seasonal epidemics and occasional pandemics, rely on interactions with host proteins for their RNA genome transcription and replication. The viral RNA polymerase utilizes ...Influenza A viruses, causing seasonal epidemics and occasional pandemics, rely on interactions with host proteins for their RNA genome transcription and replication. The viral RNA polymerase utilizes host RNA polymerase II (Pol II) and interacts with the serine 5 phosphorylated (pS5) C-terminal domain (CTD) of Pol II to initiate transcription. Our study, using single-particle electron cryomicroscopy (cryo-EM), reveals the structure of the 1918 pandemic influenza A virus polymerase bound to a synthetic pS5 CTD peptide composed of four heptad repeats mimicking the 52 heptad repeat mammalian Pol II CTD. The structure shows that the CTD peptide binds at the C-terminal domain of the PA viral polymerase subunit (PA-C) and reveals a previously unobserved position of the 627 domain of the PB2 subunit near the CTD. We identify crucial residues of the CTD peptide that mediate interactions with positively charged cavities on PA-C, explaining the preference of the viral polymerase for pS5 CTD. Functional analysis of mutants targeting the CTD-binding site within PA-C reveals reduced transcriptional function or defects in replication, highlighting the multifunctional role of PA-C in viral RNA synthesis. Our study provides insights into the structural and functional aspects of the influenza virus polymerase-host Pol II interaction and identifies a target for antiviral development.IMPORTANCEUnderstanding the intricate interactions between influenza A viruses and host proteins is crucial for developing targeted antiviral strategies. This study employs advanced imaging techniques to uncover the structural nuances of the 1918 pandemic influenza A virus polymerase bound to a specific host protein, shedding light on the vital process of viral RNA synthesis. The study identifies key amino acid residues in the influenza polymerase involved in binding host polymerase II (Pol II) and highlights their role in both viral transcription and genome replication. These findings not only deepen our understanding of the influenza virus life cycle but also pinpoint a potential target for antiviral development. By elucidating the structural and functional aspects of the influenza virus polymerase-host Pol II interaction, this research provides a foundation for designing interventions to disrupt viral replication and transcription, offering promising avenues for future antiviral therapies. | ||||||||||||||||||||||||
履歴 |
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構造の表示
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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ダウンロード
PDBx/mmCIF形式 | ![]() | 746.6 KB | 表示 | ![]() |
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PDB形式 | ![]() | 615.1 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 18947MC ![]() 8r60C 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
-タンパク質 , 3種, 3分子 ACB
#1: タンパク質 | 分子量: 82663.383 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: PA 発現宿主: ![]() ![]() 参照: UniProt: Q3HM39 |
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#2: タンパク質 | 分子量: 102377.219 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: PB2 発現宿主: ![]() ![]() 参照: UniProt: Q3HM41 |
#6: タンパク質 | 分子量: 86625.211 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: PB1 発現宿主: ![]() ![]() 参照: UniProt: Q3HM40, RNA-directed RNA polymerase |
-RNA鎖 , 2種, 2分子 DE
#3: RNA鎖 | 分子量: 4862.017 Da / 分子数: 1 / 由来タイプ: 合成 由来: (合成) ![]() |
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#4: RNA鎖 | 分子量: 5335.125 Da / 分子数: 1 / 由来タイプ: 合成 由来: (合成) ![]() |
-タンパク質・ペプチド , 1種, 1分子 X
#5: タンパク質・ペプチド | 分子量: 3216.893 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) ![]() |
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-詳細
研究の焦点であるリガンドがあるか | Y |
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Has protein modification | 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: 1918 H1N1 Viral polymerase heterotrimer in complex with 4 repeat serine-5 phosphorylated PolII peptide with ordered PB2 C-terminal domains タイプ: COMPLEX / Entity ID: all / 由来: MULTIPLE SOURCES | ||||||||||||||||||||||||||||||
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由来(天然) | 生物種: ![]() | ||||||||||||||||||||||||||||||
由来(組換発現) | 生物種: ![]() ![]() | ||||||||||||||||||||||||||||||
緩衝液 | pH: 7.6 | ||||||||||||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 0.3 mg/ml / 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: TFS 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): 2500 nm / 最小 デフォーカス(公称値): 1200 nm |
撮影 | 電子線照射量: 40 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k 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: 4.23 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 16121 / 対称性のタイプ: POINT |
原子モデル構築 | プロトコル: RIGID BODY FIT 詳細: The model from 8R60 was used as a starting point. The PB2 C-terminal domains (7NHX) were split into Cap-binding domain and 627/NLS domains which were rigid body fit into the density. Seperate ...詳細: The model from 8R60 was used as a starting point. The PB2 C-terminal domains (7NHX) were split into Cap-binding domain and 627/NLS domains which were rigid body fit into the density. Seperate models were manually linked |
原子モデル構築 | PDB-ID: 7NHX Accession code: 7NHX / Source name: PDB / タイプ: experimental model |