+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7sqy | ||||||
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タイトル | CSDaV GFP mutant | ||||||
要素 | Citrus Sudden Death-associated Virus Capsid Protein,Green fluorescent protein,Citrus Sudden Death-associated Virus Capsid Protein | ||||||
キーワード | VIRUS / Capsid / coat protein | ||||||
機能・相同性 | 機能・相同性情報 mRNA methyltransferase activity / mRNA modification / RNA processing / bioluminescence / generation of precursor metabolites and energy / viral capsid / RNA helicase activity / viral RNA genome replication / cysteine-type endopeptidase activity / RNA-dependent RNA polymerase activity ...mRNA methyltransferase activity / mRNA modification / RNA processing / bioluminescence / generation of precursor metabolites and energy / viral capsid / RNA helicase activity / viral RNA genome replication / cysteine-type endopeptidase activity / RNA-dependent RNA polymerase activity / DNA-templated transcription / structural molecule activity / proteolysis / RNA binding / ATP binding 類似検索 - 分子機能 | ||||||
生物種 | Citrus sudden death-associated virus (ウイルス) Aequorea victoria (オワンクラゲ) | ||||||
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 | Guo, F. / Matsumura, E.E. / Falk, B.W. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: Biotechnol Rep (Amst) / 年: 2022 タイトル: Citrus sudden death-associated virus as a new expression vector for rapid production of heterologous proteins, chimeric virions, and virus-like particles. 著者: Emilyn E Matsumura / Fei Guo / Daan Boogers / Dennis van Oevelen / Sandra T Vu / Bryce W Falk / 要旨: The more we understand the strategies used by viruses for protein expression, the more possibilities we have to exploit viruses as expression vectors for heterologous protein production. Advances in ...The more we understand the strategies used by viruses for protein expression, the more possibilities we have to exploit viruses as expression vectors for heterologous protein production. Advances in the development of virus-based expression systems have been possible due to generation of many virus infectious clones, especially those derived from plant viruses, which have the capability for rapid and high-level transient expression of proteins in plant cells, a robust and low-cost bioreactor. In this work, we generated new replicative virus expression vectors based on a previously constructed citrus sudden death-associated virus (CSDaV) infectious cDNA clone. These vectors were generated to express the reporter green fluorescent protein (GFP) in leaves by taking advantage of the expression strategies used by CSDaV to produce its structural proteins. We show that higher amounts of GFP can be produced from a coat protein (CP)-independent CSDaV-based vector, compared to levels of GFP expressed from a widely used non-replicative vector (pEAQ series); or GFP can be produced in fusion with the major CSDaV CP (CPp21) to be incorporated into chimeric virions. However, GFP-recombinant CSDaV virions do not appear uniformly assembled, but more likely as mosaic particles. Cryo-electron microscopy analysis from this work revealed the structures of the wild-type and the GFP-recombinant CSDaV virions, but it was not able to reveal where exactly the GFP is displayed in the chimeric virions. We show though that the incorporation of GFP-CPp21 fusion protein into virions occurs solely due to its interaction with free/non-fused CPp21, independent of other viral proteins. Therefore, individual co-expression of GFP-CPp21 and CPp21 in the same plant cells leads to the production of chimeric virus-like particles (VLPs), while GFP-CPp21 fusion protein itself is not able to self-assemble into VLPs. The new CSDaV-based expression vectors may provide an alternative platform for use in molecular farming, either for production of heterologous proteins or as scaffold for heterologous protein display. | ||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 7sqy.cif.gz | 112.7 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7sqy.ent.gz | 77.9 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7sqy.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 | 7sqy_validation.pdf.gz | 830.6 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 7sqy_full_validation.pdf.gz | 836.1 KB | 表示 | |
XML形式データ | 7sqy_validation.xml.gz | 30.8 KB | 表示 | |
CIF形式データ | 7sqy_validation.cif.gz | 44.6 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/sq/7sqy ftp://data.pdbj.org/pub/pdb/validation_reports/sq/7sqy | HTTPS FTP |
-関連構造データ
関連構造データ | 25397MC 7sqzC 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 (文献) |
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類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
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対称性 | 点対称性: (シェーンフリース記号: I (正20面体型対称)) |
-要素
#1: タンパク質 | 分子量: 49358.574 Da / 分子数: 3 / 由来タイプ: 組換発現 詳細: N-terminus MQSDTLLP is from p25, GFP is sandwiched by two viral protease cleavage sites LTGG and LTGGFS, which is followed by p21 由来: (組換発現) Citrus sudden death-associated virus (ウイルス), (組換発現) Aequorea victoria (オワンクラゲ) 遺伝子: GFP 発現宿主: Agrobacterium tumefaciens (植物への病原性) 参照: UniProt: Q3HWZ1, UniProt: P42212 |
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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 | 名称: Citrus sudden death-associated virus / タイプ: VIRUS 詳細: GFP is linked at the N-terminus of each capsid protein. Entity ID: all / 由来: MULTIPLE SOURCES |
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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: STRAIN / タイプ: VIRION |
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: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 |
急速凍結 | 装置: FEI VITROBOT MARK III / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 293 K 詳細: blot for 8 seconds before plunging with -2mm off set |
-電子顕微鏡撮影
顕微鏡 | モデル: TFS GLACIOS 詳細: Direct alignment is done from microscope side, then COMA free alignment and CTF based astigmatism correction is done using SerialEM. |
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電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 200 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 45000 X / 倍率(補正後): 56818 X / 最大 デフォーカス(公称値): 2400 nm / 最小 デフォーカス(公称値): 600 nm / 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 最高温度: 90 K / 最低温度: 90 K |
撮影 | 平均露光時間: 3 sec. / 電子線照射量: 60 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: 7890 |
-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: 60337 / 詳細: LoG based particle selection using Relion 3.1 | ||||||||||||||||||||||||||||||||||||||||||||||||||
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: 12732 / アルゴリズム: BACK PROJECTION / 詳細: Relion is used for finial reconstruction / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: AB INITIO MODEL / 空間: REAL 詳細: Ab initio model of an ASU is built in Coot and the corresponding density map is then cut out using UCSF Chimera. The model is then refined in Phenix. | ||||||||||||||||||||||||||||||||||||||||||||||||||
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: 23.33 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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