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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 8eir | ||||||
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| タイトル | SARS-CoV-2 polyprotein substrate regulates the stepwise Mpro cleavage reaction | ||||||
要素 |
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キーワード | VIRAL PROTEIN / SARS COV-2 Main protease (Mpro) in complex with the polyprotein substrate | ||||||
| 機能・相同性 | 機能・相同性情報viral genome replication / methyltransferase activity / protein guanylyltransferase activity / RNA endonuclease activity producing 3'-phosphomonoesters, hydrolytic mechanism / 5'-3' RNA helicase activity / 付加脱離酵素(リアーゼ); P-Oリアーゼ類; - / Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / endonuclease activity / Maturation of replicase proteins ...viral genome replication / methyltransferase activity / protein guanylyltransferase activity / RNA endonuclease activity producing 3'-phosphomonoesters, hydrolytic mechanism / 5'-3' RNA helicase activity / 付加脱離酵素(リアーゼ); P-Oリアーゼ類; - / Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / endonuclease activity / Maturation of replicase proteins / TRAF3-dependent IRF activation pathway / ISG15-specific peptidase activity / Transcription of SARS-CoV-2 sgRNAs / snRNP Assembly / Translation of Replicase and Assembly of the Replication Transcription Complex / methylation / Replication of the SARS-CoV-2 genome / 加水分解酵素; エステル加水分解酵素; 5'-リン酸モノエステル産生エキソリボヌクレアーゼ / double membrane vesicle viral factory outer membrane / SARS coronavirus main proteinase / host cell endoplasmic reticulum-Golgi intermediate compartment / host cell endosome / 3'-5'-RNA exonuclease activity / 5'-3' DNA helicase activity / symbiont-mediated degradation of host mRNA / mRNA guanylyltransferase / symbiont-mediated suppression of host ISG15-protein conjugation / symbiont-mediated suppression of host toll-like receptor signaling pathway / G-quadruplex RNA binding / mRNA guanylyltransferase activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF3 activity / omega peptidase activity / mRNA (guanine-N7)-methyltransferase / methyltransferase cap1 / DNA helicase / SARS-CoV-2 modulates host translation machinery / symbiont-mediated suppression of host NF-kappaB cascade / symbiont-mediated perturbation of host ubiquitin-like protein modification / host cell Golgi apparatus / methyltransferase cap1 activity / ubiquitinyl hydrolase 1 / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / cysteine-type deubiquitinase activity / 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 / lyase activity / single-stranded RNA binding / viral protein processing / host cell perinuclear region of cytoplasm / host cell endoplasmic reticulum membrane / RNA helicase / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / symbiont-mediated suppression of host gene expression / copper ion binding / viral translational frameshifting / symbiont-mediated activation of host autophagy / RNA-directed RNA polymerase / cysteine-type endopeptidase activity / viral RNA genome replication / RNA-directed RNA polymerase activity / DNA-templated transcription / lipid binding / host cell nucleus / SARS-CoV-2 activates/modulates innate and adaptive immune responses / ATP hydrolysis activity / proteolysis / RNA binding / zinc ion binding / ATP 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: 2.49 Å | ||||||
データ登録者 | Narwal, M. / Edwards, T. / Armache, J.P. / Murakami, K.S. | ||||||
| 資金援助 | 米国, 1件
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引用 | ジャーナル: J Biol Chem / 年: 2023タイトル: SARS-CoV-2 polyprotein substrate regulates the stepwise M cleavage reaction. 著者: Manju Narwal / Jean-Paul Armache / Thomas J Edwards / Katsuhiko S Murakami / ![]() 要旨: The processing of the Coronavirus polyproteins pp1a and pp1ab by the main protease M to produce mature proteins is a crucial event in virus replication and a promising target for antiviral drug ...The processing of the Coronavirus polyproteins pp1a and pp1ab by the main protease M to produce mature proteins is a crucial event in virus replication and a promising target for antiviral drug development. M cleaves polyproteins in a defined order, but how M and/or the polyproteins determine the order of cleavage remains enigmatic due to a lack of structural information about polyprotein-bound M. Here, we present the cryo-EM structures of SARS-CoV-2 M in an apo form and in complex with the nsp7-10 region of the pp1a polyprotein. The complex structure shows that M interacts with only the recognition site residues between nsp9 and nsp10, without any association with the rest of the polyprotein. Comparison between the apo form and polyprotein-bound structures of M highlights the flexible nature of the active site region of M, which allows it to accommodate ten recognition sites found in the polyprotein. These observations suggest that the role of M in selecting a preferred cleavage site is limited and underscores the roles of the structure, conformation, and/or dynamics of the polyproteins in determining the sequence of polyprotein cleavage by M. | ||||||
| 履歴 |
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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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 | 8eir.cif.gz | 174.1 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb8eir.ent.gz | 103.5 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8eir.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/ei/8eir ftp://data.pdbj.org/pub/pdb/validation_reports/ei/8eir | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 28162MC ![]() 8ekeC 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 F&H 検索 |
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リンク
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集合体
| 登録構造単位 | ![]()
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| 1 |
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要素
| #1: タンパク質 | 分子量: 33793.480 Da / 分子数: 2 / 変異: C145A / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: rep, 1a-1b / 発現宿主: ![]() #2: タンパク質 | 分子量: 58291.750 Da / 分子数: 2 / 由来タイプ: 組換発現 詳細: nsp9/10 cleavage site is the portion visible in the map 由来: (組換発現) ![]() 発現宿主: ![]() 配列の詳細 | The 3CL-proteinase (MPro) C145A active-site mutant was expressed separately and added to the nsp7- ...The 3CL-proteinase (MPro) C145A active-site mutant was expressed separately and added to the nsp7-nsp10 portion of the polyprotein in trans. However, only ten residues of the polyprotein were visible, which were bound in the mutated MPro active site. | |
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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: SARS COV-2 Mpro in complex with polyprotein substrate タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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| 分子量 | 実験値: NO |
| 由来(天然) | 生物種: ![]() |
| 由来(組換発現) | 生物種: ![]() |
| 緩衝液 | pH: 7.5 |
| 試料 | 濃度: 1 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
| 急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % |
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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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: SPOT SCAN |
| 電子レンズ | モード: OTHER / 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
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 2.49 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 244544 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
| 原子変位パラメータ | Biso mean: 13.92 Å2 | ||||||||||||||||||||||||
| 拘束条件 |
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万見について






米国, 1件
引用


PDBj









gel filtration

