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基本情報
登録情報 | ![]() | |||||||||
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タイトル | Helical reconstruction of CHIKV nsP3 helical scaffolds | |||||||||
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![]() | Helical scaffold / Replication complex / Alpha granules / Viral factories / VIRAL PROTEIN | |||||||||
機能・相同性 | ![]() ADP-ribose 1''-phosphate phosphatase / host cell filopodium / mRNA methyltransferase activity / mRNA 5'-triphosphate monophosphatase activity / mRNA 5'-phosphatase / polynucleotide adenylyltransferase / polynucleotide 5'-phosphatase activity / poly(A) RNA polymerase activity / mRNA modification / regulation of cytoskeleton organization ...ADP-ribose 1''-phosphate phosphatase / host cell filopodium / mRNA methyltransferase activity / mRNA 5'-triphosphate monophosphatase activity / mRNA 5'-phosphatase / polynucleotide adenylyltransferase / polynucleotide 5'-phosphatase activity / poly(A) RNA polymerase activity / mRNA modification / regulation of cytoskeleton organization / symbiont-mediated suppression of host mRNA transcription via inhibition of RNA polymerase II activity / 7-methylguanosine mRNA capping / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT1 activity / cysteine-type peptidase activity / 転移酵素; 一炭素原子の基を移すもの; メチル基を移すもの / host cell cytoplasmic vesicle membrane / 転移酵素; リンを含む基を移すもの; 核酸を移すもの / nucleoside-triphosphate phosphatase / methylation / 加水分解酵素; プロテアーゼ; ペプチド結合加水分解酵素; システインプロテアーゼ / RNA helicase activity / symbiont-mediated suppression of host innate immune response / RNA helicase / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / symbiont-mediated suppression of host gene expression / RNA-directed RNA polymerase / viral RNA genome replication / RNA-directed RNA polymerase activity / DNA-templated transcription / GTP binding / host cell nucleus / host cell plasma membrane / ATP hydrolysis activity / proteolysis / RNA binding / ATP binding / metal ion binding / membrane 類似検索 - 分子機能 | |||||||||
生物種 | ![]() | |||||||||
手法 | らせん対称体再構成法 / クライオ電子顕微鏡法 / 解像度: 2.35 Å | |||||||||
![]() | Reguera J / Hons M / Zimberger C / Ptchelkine D / Jones R / Desfosses A | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Alphavirus nsP3 organizes into tubular scaffolds essential for infection and the cytoplasmic granule architecture. 著者: Vasiliya Kril / Michael Hons / Celine Amadori / Claire Zimberger / Laurine Couture / Yara Bouery / Julien Burlaud-Gaillard / Andrei Karpov / Denis Ptchelkine / Alexandra L Thienel / Beate M ...著者: Vasiliya Kril / Michael Hons / Celine Amadori / Claire Zimberger / Laurine Couture / Yara Bouery / Julien Burlaud-Gaillard / Andrei Karpov / Denis Ptchelkine / Alexandra L Thienel / Beate M Kümmerer / Ambroise Desfosses / Rhian Jones / Philippe Roingeard / Laurent Meertens / Ali Amara / Juan Reguera / ![]() ![]() 要旨: Alphaviruses, such as chikungunya virus (CHIKV), are mosquito-borne viruses that represent a significant threat to human health due to the current context of global warming. Efficient alphavirus ...Alphaviruses, such as chikungunya virus (CHIKV), are mosquito-borne viruses that represent a significant threat to human health due to the current context of global warming. Efficient alphavirus infection relies on the activity of the non-structural protein 3 (nsP3), a puzzling multifunctional molecule whose role in infection remains largely unknown. NsP3 is a component of the plasma membrane-bound viral RNA replication complex (vRC) essential for RNA amplification and is also found in large cytoplasmic aggregates of unknown function Here, we report the cryo-electron microscopy (cryo-EM) structure of the CHIKV nsP3 at 2.35 Å resolution. We show that nsP3 assembles into tubular structures made by a helical arrangement of its alphavirus unique domain (AUD). The nsP3 helical scaffolds are consistent with crown structures found on tomographic reconstructions of the mature viral RCs. In addition, nsP3 helices assemble into cytoplasmic granules organized in a network of tubular structures that contain viral genomic RNA and capsid as well as host factors required for productive infection. Structure-guided mutagenesis identified residues that prevent or disturb nsP3 assemblies, resulting in impaired viral replication or transcription. Altogether, our results reveal an unexpected nsP3-dependent molecular organization essential for different phases of alphavirus infection. | |||||||||
履歴 |
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構造の表示
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マップデータ | ![]() | 244.7 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 21.9 KB 21.9 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 13.4 KB | 表示 | ![]() |
画像 | ![]() | 97.8 KB | ||
Filedesc metadata | ![]() | 6.6 KB | ||
その他 | ![]() ![]() ![]() ![]() ![]() | 201.2 MB 128.3 MB 5.7 MB 239.8 MB 239.8 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-検証レポート
文書・要旨 | ![]() | 805.9 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 805.5 KB | 表示 | |
XML形式データ | ![]() | 22.3 KB | 表示 | |
CIF形式データ | ![]() | 29.2 KB | 表示 | |
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-関連構造データ
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リンク
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||
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ボクセルのサイズ | X=Y=Z: 1.06 Å | ||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
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試料の構成要素
-全体 : Helical scaffold assembly of CHIKV nsP3 mediated by its Unique al...
全体 | 名称: Helical scaffold assembly of CHIKV nsP3 mediated by its Unique alphavirus domain. |
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要素 |
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-超分子 #1: Helical scaffold assembly of CHIKV nsP3 mediated by its Unique al...
超分子 | 名称: Helical scaffold assembly of CHIKV nsP3 mediated by its Unique alphavirus domain. タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1 |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 220.25 kDa/nm |
-分子 #1: Non-structural protein 3
分子 | 名称: Non-structural protein 3 / タイプ: protein_or_peptide / ID: 1 / コピー数: 5 / 光学異性体: LEVO / EC番号: ADP-ribose 1''-phosphate phosphatase |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 57.418207 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: APSYRVKRMD IAKNDEECVV NAANPRGLPG DGVCKAVYKK WPESFKNSAT PVGTAKTVMC GTYPVIHAVG PNFSNYSESE GDRELAAAY REVAKEVTRL GVNSVAIPLL STGVYSGGKD RLTQSLNHLF TAMDSTDADV VIYCRDKEWE KKISEAIQMR T QVELLDEH ...文字列: APSYRVKRMD IAKNDEECVV NAANPRGLPG DGVCKAVYKK WPESFKNSAT PVGTAKTVMC GTYPVIHAVG PNFSNYSESE GDRELAAAY REVAKEVTRL GVNSVAIPLL STGVYSGGKD RLTQSLNHLF TAMDSTDADV VIYCRDKEWE KKISEAIQMR T QVELLDEH ISIDCDVVRV HPDSSLAGRK GYSTTEGALY SYLEGTRFHQ TAVDMAEIYT MWPKQTEANE QVCLYALGES IE SIRQKCP VDDADASSPP KTVPCLCRYA MTPERVTRLR MNHVTSIIVC SSFPLPKYKI EGVQKVKCSK VMLFDHNVPS RVS PREYRP SQESVQEAST TTSLTHSQFD LSVDGKILPV PSDLDADAPA LEPALDDGAI HTLPSATGNL AAVSDWVMST VPVA PPRRR RGRNLTVTCD EREGNITPMA SVRFFRAELC PVVQETAETR DTAMSLQAPP STATELSHPP ISFGAPSETF PITFG DFNE GEIESLSSEL LTFGDFLPGE VDDLTDSDWS TCSDTDDEL UniProtKB: Polyprotein P1234 |
-分子 #2: ZINC ION
分子 | 名称: ZINC ION / タイプ: ligand / ID: 2 / コピー数: 5 / 式: ZN |
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分子量 | 理論値: 65.409 Da |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | らせん対称体再構成法 |
試料の集合状態 | helical array |
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試料調製
緩衝液 | pH: 7.5 |
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凍結 | 凍結剤: ETHANE-PROPANE |
詳細 | his sample was heterogeneous in lenght |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 平均電子線量: 18.1 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2.5 µm / 最小 デフォーカス(公称値): 0.8 µm |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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画像解析
最終 再構成 | 想定した対称性 - らせんパラメータ - Δz: 2.782 Å 想定した対称性 - らせんパラメータ - ΔΦ: 164.175 ° 想定した対称性 - らせんパラメータ - 軸対称性: C1 (非対称) 解像度のタイプ: BY AUTHOR / 解像度: 2.35 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 使用した粒子像数: 807973 |
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初期モデル | モデルのタイプ: INSILICO MODEL In silico モデル: Alphafold was used to have a model of the CHIKV AUD domain |
最終 角度割当 | タイプ: NOT APPLICABLE |