+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 3j93 | ||||||
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タイトル | Fitting of Fab into the cryoEM density map of EV71 procapsid in complex with Fab22A12 | ||||||
要素 |
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キーワード | IMMUNE SYSTEM / Fab / EV71 / Fab22A12 | ||||||
生物種 | Mus musculus (ハツカネズミ) | ||||||
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: 8.8 Å | ||||||
データ登録者 | Shingler, K.L. / Cifuente, J.O. / Ashley, R.E. / Makhov, A.M. / Conway, J.F. / Hafenstein, S. | ||||||
引用 | ジャーナル: J Virol / 年: 2015 タイトル: The enterovirus 71 procapsid binds neutralizing antibodies and rescues virus infection in vitro. 著者: Kristin L Shingler / Javier O Cifuente / Robert E Ashley / Alexander M Makhov / James F Conway / Susan Hafenstein / 要旨: Enterovirus 71 (EV71) is responsible for seasonal outbreaks of hand, foot, and mouth disease in the Asia-Pacific region. The virus has the capability to cause severe disease and death, especially in ...Enterovirus 71 (EV71) is responsible for seasonal outbreaks of hand, foot, and mouth disease in the Asia-Pacific region. The virus has the capability to cause severe disease and death, especially in young children. Although several vaccines are currently in clinical trials, no vaccines or therapeutics have been approved for use. Previous structural studies have revealed that two antigenically distinct capsid forms are produced in EV71-infected cells: an expanded empty capsid, sometimes called a procapsid, and the infectious virus. Specifically, an immunodominant epitope of EV71 that maps to the virus canyon is structurally different in the procapsid and virus. This structure-function study shows that the procapsid can sequester antibodies, thus enhancing EV71 infection in vitro. The results presented here suggest that, due to conformational differences between the EV71 procapsid and virus, the presence of the procapsid in natural virus infections should be considered in the future design of vaccines or therapeutics. IMPORTANCE: In a picornavirus infection, both an infectious and a noninfectious empty capsid, sometimes referred to as a procapsid, are produced. It was novel to discover that the procapsid form of ...IMPORTANCE: In a picornavirus infection, both an infectious and a noninfectious empty capsid, sometimes referred to as a procapsid, are produced. It was novel to discover that the procapsid form of EV71 was expanded and antigenically distinct from the infectious virus. Previously, it had been supposed that this empty capsid was an off-pathway dead end or at best served for storage of pentameric subunits, which was later shown to be unlikely. It remains unexplained why picornaviruses evolutionarily conserve the wasteful production of so much noninfectious capsid. Here, we demonstrate that the EV71 procapsid has different antigenic properties than the infectious virus. Thus, the procapsid has the capacity to sequester neutralizing antibody and protect the virus, promoting or restoring a successful infection in vitro. This important observation should be considered in the future design and development of vaccines and therapeutics. | ||||||
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 | 3j93.cif.gz | 93.2 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb3j93.ent.gz | 70.7 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 3j93.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 | 3j93_validation.pdf.gz | 779.1 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 3j93_full_validation.pdf.gz | 790.2 KB | 表示 | |
XML形式データ | 3j93_validation.xml.gz | 22 KB | 表示 | |
CIF形式データ | 3j93_validation.cif.gz | 30.7 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/j9/3j93 ftp://data.pdbj.org/pub/pdb/validation_reports/j9/3j93 | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
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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: 抗体 | 分子量: 23261.770 Da / 分子数: 1 / 断片: Fab / 由来タイプ: 天然 / 由来: (天然) Mus musculus (ハツカネズミ) |
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#2: 抗体 | 分子量: 23349.105 Da / 分子数: 1 / 断片: Fab / 由来タイプ: 天然 / 由来: (天然) Mus musculus (ハツカネズミ) |
Has protein modification | 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 |
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ウイルスについての詳細 | 中空か: YES / エンベロープを持つか: NO / ホストのカテゴリ: VERTEBRATES / 単離: STRAIN / タイプ: VIRION | ||||||||||||||||
天然宿主 | 生物種: Homo sapiens / 株: HeLa | ||||||||||||||||
緩衝液 | 名称: 10 mM Tris, 200 mM NaCl, 50 mM MgCl2 / pH: 7.5 / 詳細: 10 mM Tris, 200 mM NaCl, 50 mM MgCl2 | ||||||||||||||||
試料 | 濃度: 1 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: holey carbon Quantifoil EM grids | ||||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK III / 凍結剤: ETHANE 詳細: Plunged into ethane-propane mixture (FEI VITROBOT MARK III) |
-電子顕微鏡撮影
実験機器 | モデル: Tecnai F20 / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TECNAI F20 / 日付: 2011年7月15日 |
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): 50000 X / Cs: 2 mm / カメラ長: 0 mm |
試料ホルダ | 試料ホルダーモデル: GATAN LIQUID NITROGEN |
撮影 | フィルム・検出器のモデル: KODAK SO-163 FILM |
放射 | プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray |
放射波長 | 相対比: 1 |
-解析
EMソフトウェア |
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CTF補正 | 詳細: CTFFind3 | ||||||||||||||||||||||||
対称性 | 点対称性: I (正20面体型対称) | ||||||||||||||||||||||||
3次元再構成 | 手法: Single Particle Reconstruction / 解像度: 8.8 Å / 解像度の算出法: FSC 0.5 CUT-OFF / 粒子像の数: 15226 / ピクセルサイズ(公称値): 1.27 Å / ピクセルサイズ(実測値): 1.27 Å 詳細: (Single particle details: Processing was completed with EMAN2 and AUTO3DEM) (Single particle--Applied symmetry: I) 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | 空間: REAL | ||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 3GK8 Accession code: 3GK8 / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||
精密化ステップ | サイクル: LAST
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