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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: 8c6d | |||||||||||||||||||||||||||||||||||||||
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タイトル | Production of antigenically stable enterovirus A71 virus-like particles in Pichia pastoris as a vaccine candidate. | |||||||||||||||||||||||||||||||||||||||
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![]() | VIRUS LIKE PARTICLE / EVA71 / Enterovirus / VLP / rsVLP | |||||||||||||||||||||||||||||||||||||||
機能・相同性 | ![]() symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MDA-5 activity / picornain 2A / symbiont-mediated suppression of host mRNA export from nucleus / symbiont genome entry into host cell via pore formation in plasma membrane / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / viral capsid / nucleoside-triphosphate phosphatase / channel activity ...symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MDA-5 activity / picornain 2A / symbiont-mediated suppression of host mRNA export from nucleus / symbiont genome entry into host cell via pore formation in plasma membrane / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / viral capsid / nucleoside-triphosphate phosphatase / channel activity / monoatomic ion transmembrane transport / host cell cytoplasm / DNA replication / RNA helicase activity / symbiont-mediated suppression of host gene expression / endocytosis involved in viral entry into host cell / 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 / virion attachment to host cell / host cell nucleus / structural molecule activity / ATP hydrolysis activity / proteolysis / RNA binding / zinc ion binding / ATP binding / membrane 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: 2.4 Å | |||||||||||||||||||||||||||||||||||||||
![]() | Kingston, N.J. / Snowden, J.S. / Stonehouse, N.J. / Rowlands, D.J. / Hogle, J.M. | |||||||||||||||||||||||||||||||||||||||
資金援助 | ![]() ![]()
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![]() | ![]() タイトル: Production of antigenically stable enterovirus A71 virus-like particles in as a vaccine candidate. 著者: Natalie J Kingston / Joseph S Snowden / Agnieszka Martyna / Mona Shegdar / Keith Grehan / Alison Tedcastle / Elaine Pegg / Helen Fox / Andrew J Macadam / Javier Martin / James M Hogle / David ...著者: Natalie J Kingston / Joseph S Snowden / Agnieszka Martyna / Mona Shegdar / Keith Grehan / Alison Tedcastle / Elaine Pegg / Helen Fox / Andrew J Macadam / Javier Martin / James M Hogle / David J Rowlands / Nicola J Stonehouse / ![]() ![]() 要旨: Enterovirus A71 (EVA71) causes widespread disease in young children with occasional fatal consequences. In common with other picornaviruses, both empty capsids (ECs) and infectious virions are ...Enterovirus A71 (EVA71) causes widespread disease in young children with occasional fatal consequences. In common with other picornaviruses, both empty capsids (ECs) and infectious virions are produced during the viral lifecycle. While initially antigenically indistinguishable from virions, ECs readily convert to an expanded conformation at moderate temperatures. In the closely related poliovirus, these conformational changes result in loss of antigenic sites required to elicit protective immune responses. Whether this is true for EVA71 remains to be determined and is the subject of this investigation. We previously reported the selection of a thermally resistant EVA71 genogroup B2 population using successive rounds of heating and passage. The mutations found in the structural protein-coding region of the selected population conferred increased thermal stability to both virions and naturally produced ECs. Here, we introduced these mutations into a recombinant expression system to produce stabilised virus-like particles (VLPs) in . The stabilised VLPs retain the native virion-like antigenic conformation as determined by reactivity with a specific antibody. Structural studies suggest multiple potential mechanisms of antigenic stabilisation, however, unlike poliovirus, both native and expanded EVA71 particles elicited antibodies able to directly neutralise virus . Therefore, the anti-EVA71 neutralising antibodies are elicited by sites which are not canonically associated with the native conformation, but whether antigenic sites specific to the native conformation provide additional protective responses remains unclear. VLPs are likely to provide cheaper and safer alternatives for vaccine production and these data show that VLP vaccines are comparable with inactivated virus vaccines at inducing neutralising antibodies. | |||||||||||||||||||||||||||||||||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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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 | ![]() | 145.7 KB | 表示 | ![]() |
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PDB形式 | ![]() | 111.9 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.6 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.6 MB | 表示 | |
XML形式データ | ![]() | 36.7 KB | 表示 | |
CIF形式データ | ![]() | 53.2 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 16450MC 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 ![]() |
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リンク
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 32705.754 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 発現宿主: ![]() 参照: UniProt: A0A2L1GIK5, picornain 2A, nucleoside-triphosphate phosphatase, picornain 3C, RNA-directed RNA polymerase |
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#2: タンパク質 | 分子量: 35253.270 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 発現宿主: ![]() |
#3: タンパク質 | 分子量: 26558.369 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 発現宿主: ![]() |
#4: 化合物 | ChemComp-SQS / ( |
研究の焦点であるリガンドがあるか | Y |
Has protein modification | N |
-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: Enterovirus A71 / タイプ: VIRUS / 詳細: rsVLP expressed in Pichia pastoris / Entity ID: #1-#3 / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() ![]() |
由来(組換発現) | 生物種: ![]() |
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 / 単離: OTHER / タイプ: VIRUS-LIKE PARTICLE |
天然宿主 | 生物種: Homo sapiens |
緩衝液 | pH: 7.4 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE |
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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: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2900 nm / 最小 デフォーカス(公称値): 500 nm |
撮影 | 電子線照射量: 31.08 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) |
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解析
ソフトウェア | 名称: PHENIX / バージョン: 1.14_3260: / 分類: 精密化 | |||||||||
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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 | |||||||||
対称性 | 点対称性: I (正20面体型対称) | |||||||||
3次元再構成 | 解像度: 2.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 11789 / 対称性のタイプ: POINT |