+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6y6k | |||||||||
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タイトル | Cryo-EM structure of a Phenuiviridae L protein | |||||||||
要素 | RNA-dependent RNA polymerase | |||||||||
キーワード | VIRAL PROTEIN / Bunyavirus / Phenuiviridae / L protein / viral polymerase / cap-snatching | |||||||||
機能・相同性 | 機能・相同性情報 host cell endoplasmic reticulum / virion component / host cell endoplasmic reticulum-Golgi intermediate compartment / host cell Golgi apparatus / 加水分解酵素; エステル加水分解酵素 / hydrolase activity / RNA-directed RNA polymerase / viral RNA genome replication / RNA-dependent RNA polymerase activity / DNA-templated transcription / metal ion binding 類似検索 - 分子機能 | |||||||||
生物種 | SFTS virus AH12 (ウイルス) | |||||||||
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: 3.78 Å | |||||||||
データ登録者 | Vogel, D. / Thorkelsson, S.R. / Quemin, E. / Meier, K. / Kouba, T. / Gogrefe, N. / Busch, C. / Reindl, S. / Guenther, S. / Cusack, S. ...Vogel, D. / Thorkelsson, S.R. / Quemin, E. / Meier, K. / Kouba, T. / Gogrefe, N. / Busch, C. / Reindl, S. / Guenther, S. / Cusack, S. / Gruenewald, K. / Rosenthal, M. | |||||||||
資金援助 | ドイツ, 2件
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引用 | ジャーナル: Nucleic Acids Res / 年: 2020 タイトル: Structural and functional characterization of the severe fever with thrombocytopenia syndrome virus L protein. 著者: Dominik Vogel / Sigurdur Rafn Thorkelsson / Emmanuelle R J Quemin / Kristina Meier / Tomas Kouba / Nadja Gogrefe / Carola Busch / Sophia Reindl / Stephan Günther / Stephen Cusack / Kay ...著者: Dominik Vogel / Sigurdur Rafn Thorkelsson / Emmanuelle R J Quemin / Kristina Meier / Tomas Kouba / Nadja Gogrefe / Carola Busch / Sophia Reindl / Stephan Günther / Stephen Cusack / Kay Grünewald / Maria Rosenthal / 要旨: The Bunyavirales order contains several emerging viruses with high epidemic potential, including Severe fever with thrombocytopenia syndrome virus (SFTSV). The lack of medical countermeasures, such ...The Bunyavirales order contains several emerging viruses with high epidemic potential, including Severe fever with thrombocytopenia syndrome virus (SFTSV). The lack of medical countermeasures, such as vaccines and antivirals, is a limiting factor for the containment of any virus outbreak. To develop such antivirals a profound understanding of the viral replication process is essential. The L protein of bunyaviruses is a multi-functional and multi-domain protein performing both virus transcription and genome replication and, therefore, is an ideal drug target. We established expression and purification procedures for the full-length L protein of SFTSV. By combining single-particle electron cryo-microscopy and X-ray crystallography, we obtained 3D models covering ∼70% of the SFTSV L protein in the apo-conformation including the polymerase core region, the endonuclease and the cap-binding domain. We compared this first L structure of the Phenuiviridae family to the structures of La Crosse peribunyavirus L protein and influenza orthomyxovirus polymerase. Together with a comprehensive biochemical characterization of the distinct functions of SFTSV L protein, this work provides a solid framework for future structural and functional studies of L protein-RNA interactions and the development of antiviral strategies against this group of emerging human pathogens. #1: ジャーナル: Acta Crystallogr D Struct Biol / 年: 2018 タイトル: Real-space refinement in PHENIX for cryo-EM and crystallography. 著者: Pavel V Afonine / Billy K Poon / Randy J Read / Oleg V Sobolev / Thomas C Terwilliger / Alexandre Urzhumtsev / Paul D Adams / 要旨: This article describes the implementation of real-space refinement in the phenix.real_space_refine program from the PHENIX suite. The use of a simplified refinement target function enables very fast ...This article describes the implementation of real-space refinement in the phenix.real_space_refine program from the PHENIX suite. The use of a simplified refinement target function enables very fast calculation, which in turn makes it possible to identify optimal data-restraint weights as part of routine refinements with little runtime cost. Refinement of atomic models against low-resolution data benefits from the inclusion of as much additional information as is available. In addition to standard restraints on covalent geometry, phenix.real_space_refine makes use of extra information such as secondary-structure and rotamer-specific restraints, as well as restraints or constraints on internal molecular symmetry. The re-refinement of 385 cryo-EM-derived models available in the Protein Data Bank at resolutions of 6 Å or better shows significant improvement of the models and of the fit of these models to the target maps. #2: ジャーナル: J Struct Biol / 年: 2012 タイトル: RELION: implementation of a Bayesian approach to cryo-EM structure determination. 著者: Sjors H W Scheres / 要旨: RELION, for REgularized LIkelihood OptimizatioN, is an open-source computer program for the refinement of macromolecular structures by single-particle analysis of electron cryo-microscopy (cryo-EM) ...RELION, for REgularized LIkelihood OptimizatioN, is an open-source computer program for the refinement of macromolecular structures by single-particle analysis of electron cryo-microscopy (cryo-EM) data. Whereas alternative approaches often rely on user expertise for the tuning of parameters, RELION uses a Bayesian approach to infer parameters of a statistical model from the data. This paper describes developments that reduce the computational costs of the underlying maximum a posteriori (MAP) algorithm, as well as statistical considerations that yield new insights into the accuracy with which the relative orientations of individual particles may be determined. A so-called gold-standard Fourier shell correlation (FSC) procedure to prevent overfitting is also described. The resulting implementation yields high-quality reconstructions and reliable resolution estimates with minimal user intervention and at acceptable computational costs. | |||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 6y6k.cif.gz | 261.4 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6y6k.ent.gz | 193.4 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6y6k.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
文書・要旨 | 6y6k_validation.pdf.gz | 891.1 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 6y6k_full_validation.pdf.gz | 911.3 KB | 表示 | |
XML形式データ | 6y6k_validation.xml.gz | 39.3 KB | 表示 | |
CIF形式データ | 6y6k_validation.cif.gz | 59.6 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/y6/6y6k ftp://data.pdbj.org/pub/pdb/validation_reports/y6/6y6k | HTTPS FTP |
-関連構造データ
関連構造データ | 10706MC 6xyaC C: 同じ文献を引用 (文献) M: このデータのモデリングに利用したマップデータ |
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類似構造データ | |
その他のデータベース |
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-リンク
-集合体
登録構造単位 |
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-要素
#1: タンパク質 | 分子量: 235742.531 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) SFTS virus AH12 (ウイルス) / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: F1BV96 |
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#2: 化合物 | ChemComp-MG / |
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 |
-試料調製
構成要素 | 名称: Severe Fever with Thrombocytopenia Syndrome Virus L Protein タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT | ||||||||||||||||||||
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分子量 | 値: 0.238 MDa / 実験値: NO | ||||||||||||||||||||
由来(天然) | 生物種: SFTS virus AH12 (ウイルス) | ||||||||||||||||||||
由来(組換発現) | 生物種: Escherichia coli (大腸菌) | ||||||||||||||||||||
緩衝液 | pH: 7 | ||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 0.15 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||
試料支持 | 詳細: Harrick Plasma cleaner / グリッドのタイプ: Quantifoil R2/1 | ||||||||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE-PROPANE / 湿度: 100 % / 凍結前の試料温度: 277.15 K / 詳細: Blot for 2s using blotting force -10 |
-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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 105000 X / 最大 デフォーカス(公称値): 3000 nm / 最小 デフォーカス(公称値): 500 nm / Cs: 2.7 mm / C2レンズ絞り径: 70 µm / アライメント法: BASIC |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 平均露光時間: 3 sec. / 電子線照射量: 59.45 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 撮影したグリッド数: 1 / 実像数: 2626 |
電子光学装置 | エネルギーフィルター名称: GIF Bioquantum / エネルギーフィルタースリット幅: 20 eV |
-解析
ソフトウェア |
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EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 780000 詳細: Particles were picked with Warp's pretrained agent BoxNet2Mask_20180918 | ||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.78 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 220000 / アルゴリズム: FOURIER SPACE / クラス平均像の数: 1 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 225.217 / プロトコル: AB INITIO MODEL / 空間: REAL | ||||||||||||||||||||||||||||||||||||
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: 64.75 Å2 | ||||||||||||||||||||||||||||||||||||
拘束条件 |
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