+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6qoz | ||||||||||||
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タイトル | CryoEM reconstruction of Cowpea Mosaic Virus (CPMV) bound to an Affimer reagent | ||||||||||||
要素 |
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キーワード | VIRUS (ウイルス) / CPMV / COMOVIRIDAE / PICORNAVIRALES (ピコルナウイルス目) / AFFIMEr REAGENT / antibody-like (抗体) | ||||||||||||
機能・相同性 | 機能・相同性情報 transport of virus in host, cell to cell / host cell plasmodesma / T=3 icosahedral viral capsid / host cell nucleus / GTP binding / structural molecule activity / DNA binding / RNA binding 類似検索 - 分子機能 | ||||||||||||
生物種 | Cowpea mosaic virus (ササゲモザイクウイルス) synthetic construct (人工物) | ||||||||||||
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: 3.4 Å | ||||||||||||
データ登録者 | Hesketh, E.L. / Tiede, C. / Adamson, H. / Adams, T.L. / Byrne, M.J. / Meshcheriakova, Y. / Lomonossoff, G.P. / Kruse, I. / McPherson, M.J. / Tomlinson, D.C. / Ranson, N.A. | ||||||||||||
資金援助 | 英国, 3件
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引用 | ジャーナル: Sci Rep / 年: 2019 タイトル: Affimer reagents as tools in diagnosing plant virus diseases. 著者: Emma L Hesketh / Christian Tiede / Hope Adamson / Thomas L Adams / Matthew J Byrne / Yulia Meshcheriakova / Inga Kruse / Michael J McPherson / George P Lomonossoff / Darren C Tomlinson / Neil A Ranson / 要旨: Plant viruses can cause devastating losses to agriculture and are therefore a major threat to food security. The rapid identification of virally-infected crops allowing containment is essential to ...Plant viruses can cause devastating losses to agriculture and are therefore a major threat to food security. The rapid identification of virally-infected crops allowing containment is essential to limit such threats, but plant viral diseases can be extremely challenging to diagnose. An ideal method for plant virus diagnosis would be a device which can be implemented easily in the field. Such devices require a binding reagent that is specific for the virus of interest. We chose to investigate the use of Affimer reagents, artificial binding proteins and a model plant virus Cowpea Mosaic virus (CPMV) empty virus like particles (eVLPs). CPMV-eVLP mimic the morphology of wild-type (WT) CPMV but lack any infectious genomic material and so do not have biocontainment issues. We have produced and purified an Affimer reagent selected for its ability to bind to CPMV-eVLP and have shown that the selected Affimer also specifically binds to WT CPMV. We have produced a 3.4 Å structure of WT CPMV bound to the Affimer using cryo-electron microscopy. Finally, we have shown that this Affimer is capable of reliably detecting the virus in crude extracts of CPMV-infected leaves and can therefore form the basis for the future development of diagnostic tests. #1: ジャーナル: Nat Commun / 年: 2015 タイトル: Mechanisms of assembly and genome packaging in an RNA virus revealed by high-resolution cryo-EM. 著者: Emma L Hesketh / Yulia Meshcheriakova / Kyle C Dent / Pooja Saxena / Rebecca F Thompson / Joseph J Cockburn / George P Lomonossoff / Neil A Ranson / 要旨: Cowpea mosaic virus is a plant-infecting member of the Picornavirales and is of major interest in the development of biotechnology applications. Despite the availability of >100 crystal structures of ...Cowpea mosaic virus is a plant-infecting member of the Picornavirales and is of major interest in the development of biotechnology applications. Despite the availability of >100 crystal structures of Picornavirales capsids, relatively little is known about the mechanisms of capsid assembly and genome encapsidation. Here we have determined cryo-electron microscopy reconstructions for the wild-type virus and an empty virus-like particle, to 3.4 Å and 3.0 Å resolution, respectively, and built de novo atomic models of their capsids. These new structures reveal the C-terminal region of the small coat protein subunit, which is essential for virus assembly and which was missing from previously determined crystal structures, as well as residues that bind to the viral genome. These observations allow us to develop a new model for genome encapsidation and capsid assembly. | ||||||||||||
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 | 6qoz.cif.gz | 453.2 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6qoz.ent.gz | 377.1 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6qoz.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/qo/6qoz ftp://data.pdbj.org/pub/pdb/validation_reports/qo/6qoz | HTTPS FTP |
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-関連構造データ
-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: 20961.564 Da / 分子数: 4 / 由来タイプ: 組換発現 由来: (組換発現) Cowpea mosaic virus (ササゲモザイクウイルス) 株: SB 発現宿主: Nicotiana benthamiana (ベンサミアナタバコ) 参照: UniProt: P03599 #2: タンパク質 | 分子量: 40858.434 Da / 分子数: 4 / 由来タイプ: 組換発現 由来: (組換発現) Cowpea mosaic virus (ササゲモザイクウイルス) 株: SB 発現宿主: Nicotiana benthamiana (ベンサミアナタバコ) 参照: UniProt: P03599 #3: タンパク質 | | 分子量: 9286.674 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) synthetic construct (人工物) / 発現宿主: Escherichia coli (大腸菌) |
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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 |
-試料調製
構成要素 |
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分子量 | 実験値: NO | ||||||||||||||||||||||||
由来(天然) |
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由来(組換発現) |
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ウイルスについての詳細 | 中空か: NO / エンベロープを持つか: NO / 単離: SPECIES / タイプ: VIRION | ||||||||||||||||||||||||
天然宿主 | 生物種: Cowpea mosaic virus | ||||||||||||||||||||||||
緩衝液 | pH: 7 | ||||||||||||||||||||||||
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 400 divisions/in. | ||||||||||||||||||||||||
急速凍結 | 装置: LEICA EM GP / 凍結剤: ETHANE / 湿度: 95 % / 凍結前の試料温度: 281 K |
-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: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / C2レンズ絞り径: 70 µm / アライメント法: COMA FREE |
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: 2 sec. / 電子線照射量: 45 e/Å2 / 検出モード: INTEGRATING フィルム・検出器のモデル: FEI FALCON II (4k x 4k) 撮影したグリッド数: 1 / 実像数: 2980 |
-解析
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: 144258 | ||||||||||||||||||||||||
対称性 | 点対称性: I (正20面体型対称) | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 15441 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT / 空間: REAL | ||||||||||||||||||||||||
原子モデル構築 |
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