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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: 9nrx | |||||||||||||||||||||||||||
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| タイトル | Venezuelan Equine Encephalitis Virus in complex with the single domain antibody V2B3 | |||||||||||||||||||||||||||
要素 |
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キーワード | Viral protein/Immune System / Venezuelan Equine Encephalitis virus / Virus-Like Particle / VIRUS LIKE PARTICLE / single domain antibody / nanobody / Viral protein-Immune System complex | |||||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報T=4 icosahedral viral capsid / host cell cytoplasm / serine-type endopeptidase activity / fusion of virus membrane with host endosome membrane / symbiont entry into host cell / virion attachment to host cell / host cell nucleus / host cell plasma membrane / virion membrane / structural molecule activity ...T=4 icosahedral viral capsid / host cell cytoplasm / serine-type endopeptidase activity / fusion of virus membrane with host endosome membrane / symbiont entry into host cell / virion attachment to host cell / host cell nucleus / host cell plasma membrane / virion membrane / structural molecule activity / proteolysis / RNA binding / membrane 類似検索 - 分子機能 | |||||||||||||||||||||||||||
| 生物種 | Venezuelan equine encephalitis virus (ベネズエラウマ脳炎ウイルス)![]() | |||||||||||||||||||||||||||
| 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: 4.6 Å | |||||||||||||||||||||||||||
データ登録者 | Pletnev, S. / Kwong, P.D. / Zhou, T. | |||||||||||||||||||||||||||
| 資金援助 | 米国, 1件
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引用 | ジャーナル: J Virol / 年: 2026タイトル: Demonstration of efficacy, cryo-EM-epitope identification, and breadth of two anti-alphavirus bispecific single domain antibodies. 著者: Christina L Gardner / Sergei Pletnev / Jinny L Liu / George P Anderson / Lisa C Shriver-Lake / Tatsiana Bylund / Courtney Green / Tyler Stephens / Matthew S Sutton / Yaroslav Tsybovsky / ...著者: Christina L Gardner / Sergei Pletnev / Jinny L Liu / George P Anderson / Lisa C Shriver-Lake / Tatsiana Bylund / Courtney Green / Tyler Stephens / Matthew S Sutton / Yaroslav Tsybovsky / Mario Roederer / Peter D Kwong / Tongqing Zhou / Ellen R Goldman / Crystal W Burke / ![]() 要旨: Venezuelan equine encephalitis virus (VEEV) is an arbovirus that causes a disease in which 4%-14% of individuals can develop neurological symptoms. Prior to 1970, VEEV was developed as a biological ...Venezuelan equine encephalitis virus (VEEV) is an arbovirus that causes a disease in which 4%-14% of individuals can develop neurological symptoms. Prior to 1970, VEEV was developed as a biological threat agent due to its stability and high morbidity when administered by aerosol. Currently, no FDA-licensed vaccines nor therapeutics for VEEV exist. Single-domain antibodies (sdAbs) may provide a therapeutic option due to their small size and ability to bind recessed epitopes not recognized by conventional antibodies. This study identified two bivalent sdAbs that were able to protect mice from a lethal challenge against both epizootic and enzootic subtypes of VEEV. Cryo-EM structures of sdAb-VEEV complexes revealed the sdAbs that comprised the bivalent sdAbs to recognize a mixture of conserved and non-conserved regions of the VEEV envelope proteins. While all three of the cryo-EM-characterized epitopes were unique in terms of their recognized VEEV residues, two sdAbs, V2B3 and V2C3, overlapped sterically, explaining why only their combinations with the non-sterically overlapping sdAb V3A8f, which composed the bivalent sdAbs described here, were so particularly effective. Binding and neutralization studies found that the bivalent sdAbs have the potential to be broad-spectrum anti-alphavirus therapeutics as they cross-neutralize multiple alphaviruses.IMPORTANCEAlphaviruses are no longer geographically constrained to one region of the world but are expanding to be of global concern. In many regions of the world, multiple alphaviruses co-circulate; therefore, having a therapeutic that is pan-alphavirus is important. A cocktail of multiple pan-alphavirus binding/neutralizing antibodies (Abs) may provide optimal coverage against alphaviruses while decreasing the prevalence of viral escape mutants, which could cause the therapeutic to no longer be efficacious. Structures of these Abs, defining their recognition, could assist in identifying optimal combinations. A bivalent pan-alphavirus single-domain antibody could be used in a cocktail with already identified alphavirus IgG antibodies. | |||||||||||||||||||||||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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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 | 9nrx.cif.gz | 1.5 MB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9nrx.ent.gz | 表示 | PDB形式 | |
| PDBx/mmJSON形式 | 9nrx.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/nr/9nrx ftp://data.pdbj.org/pub/pdb/validation_reports/nr/9nrx | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 49740MC ![]() 9nryC ![]() 9nrzC 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 F&H 検索 |
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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: 47952.066 Da / 分子数: 12 / 由来タイプ: 組換発現 由来: (組換発現) Venezuelan equine encephalitis virus (ベネズエラウマ脳炎ウイルス)細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: A0A0C4MX98#2: タンパク質 | 分子量: 47113.746 Da / 分子数: 12 / 由来タイプ: 組換発現 由来: (組換発現) Venezuelan equine encephalitis virus (ベネズエラウマ脳炎ウイルス)細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: A0A0C4MX98#3: 抗体 | 分子量: 12824.242 Da / 分子数: 3 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() Has protein modification | Y | |
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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 |
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試料調製
| 構成要素 | 名称: venezuelan equine encephalitis virus in complex with single domain antibody V2B3 タイプ: VIRUS / Entity ID: all / 由来: RECOMBINANT |
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| 由来(天然) | 生物種: Venezuelan equine encephalitis virus (ベネズエラウマ脳炎ウイルス) |
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) |
| 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: YES / 単離: OTHER / タイプ: VIRUS-LIKE PARTICLE |
| 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 |
| 試料支持 | グリッドの材料: GOLD / グリッドのタイプ: Quantifoil R2/2 |
| 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: 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 / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 800 nm / Cs: 2.7 mm |
| 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 | 電子線照射量: 40 e/Å2 フィルム・検出器のモデル: DIRECT ELECTRON APOLLO (4k x 4k) 撮影したグリッド数: 1 / 実像数: 12480 |
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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: 41401 | ||||||||||||||||||||||||||||||||||||
| 3次元再構成 | 解像度: 4.6 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 2451747 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||
| 原子モデル構築 | 空間: REAL | ||||||||||||||||||||||||||||||||||||
| 拘束条件 |
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万見について




Venezuelan equine encephalitis virus (ベネズエラウマ脳炎ウイルス)

米国, 1件
引用




PDBj






Homo sapiens (ヒト)

FIELD EMISSION GUN