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基本情報
登録情報 | データベース: PDB / ID: 9mnh | ||||||
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タイトル | Angavokely virus (AngV) fusion (F) protein ectodomain in pre-fusion conformation | ||||||
![]() | Fusion Protein | ||||||
![]() | VIRAL PROTEIN / Henipavirus / AngV-F protein / Pre-fusion F protein / Cryo-EM structure / Fusion Ectodomain | ||||||
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: 4.03 Å | ||||||
![]() | Lella, M. / Acharya, P. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural and antigenic characterization of novel and diverse Henipavirus glycoproteins. 要旨: Henipaviruses, a genus within the Paramyxoviridae family, include the highly virulent Nipah and Hendra viruses that cause reoccurring outbreaks of deadly disease. Recent discoveries of several new ...Henipaviruses, a genus within the Paramyxoviridae family, include the highly virulent Nipah and Hendra viruses that cause reoccurring outbreaks of deadly disease. Recent discoveries of several new Paramyxoviridae species, including the zoonotic Langya virus, have revealed much higher antigenic diversity than currently characterized and prompted the reorganization of these viruses into the Henipavirus and Parahenipavirus genera. Here, to explore the limits of structural and antigenic variation in both genera, collectively referred to here as HNVs, we constructed an expanded, antigenically diverse panel of HNV fusion and attachment glycoproteins from 56 unique HNV strains that better reflects global HNV diversity. We expressed and purified the fusion protein ectodomains and the attachment protein head domains and characterized their biochemical, biophysical and structural properties. We performed immunization experiments in mice leading to the elicitation of antibodies reactive to multiple HNV fusion proteins. Cryo-electron microscopy structures of diverse fusion proteins elucidated molecular determinants of differential pre-fusion state metastability and higher order contacts. A crystal structure of the Gamak virus attachment head domain revealed an additional domain added to the conserved 6-bladed, β-propeller fold. Taken together, these studies expand the known structural and antigenic limits of the HNVs, reveal new cross-reactive epitopes within both genera and provide foundational data for the development of broadly reactive countermeasures. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 251.8 KB | 表示 | ![]() |
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PDB形式 | ![]() | 202.6 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 | ![]() | 1.7 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.8 MB | 表示 | |
XML形式データ | ![]() | 54.3 KB | 表示 | |
CIF形式データ | ![]() | 81.3 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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1 |
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要素
#1: タンパク質 | 分子量: 58587.699 Da / 分子数: 3 / 断片: Ectodomain / 由来タイプ: 組換発現 詳細: Pre-fusion conformation. C-terminal foldon trimerization domain followed by HRV3C protease site, His-tag, and two streptavidin tags separated by GS linker. 由来: (組換発現) ![]() 発現宿主: ![]() #2: 多糖 | #3: 多糖 | #4: 糖 | ChemComp-NAG / 研究の焦点であるリガンドがあるか | Y | 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: AngV-F protein trimer in pre-fusion conformation / タイプ: COMPLEX 詳細: AngV-F fusion ectodomain is expressed with following domains at C-terminus, foldon trimerization domain, HRV3C protease site, His-tag, and two streptavidin tags separated by GS linker Entity ID: #1 / 由来: RECOMBINANT |
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分子量 | 値: 0.06 MDa / 実験値: YES |
由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() |
緩衝液 | pH: 7.4 |
緩衝液成分 | 濃度: 1 1 / 名称: Phosphate Buffer / 式: Na2HPO4/NaH2PO4 |
試料 | 濃度: 1.5 mg/ml / 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: LEICA EM GP / 凍結剤: ETHANE / 湿度: 95 % / 凍結前の試料温度: 298 K 詳細: Protein sample was applied to the grid and incubated for 30 seconds at >95% humidity. Excess protein was blotted away for 2.5 seconds before being plunge frozen into liquid 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 / 詳細: Grid screening was performed manually |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 81000 X / 倍率(補正後): 81000 X / 最大 デフォーカス(公称値): 2800 nm / 最小 デフォーカス(公称値): 1700 nm / Calibrated defocus min: 1700 nm / 最大 デフォーカス(補正後): 2800 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 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: 2.8 sec. / 電子線照射量: 28 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: 3 / 実像数: 24000 詳細: Images were collected in a movie -mode at 22 frames per second |
画像スキャン | 横: 5760 / 縦: 4092 |
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解析
EMソフトウェア |
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画像処理 | 詳細: Micrographs were motion-corrected and aligned micrographs were used for the processing | ||||||||||||||||||||||||||||
CTF補正 | 詳細: Micrographs were curated through contrast transfer function (CTF) where greater than 30 angstrom were discarded タイプ: NONE | ||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 13247526 詳細: Particles were picked using automated blob picker and extracted | ||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||
3次元再構成 | 解像度: 4.03 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 1106722 詳細: Non-uniform refinement used for the final reconstruction クラス平均像の数: 63 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT | ||||||||||||||||||||||||||||
原子モデル構築 |
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精密化 | 最高解像度: 4.03 Å 立体化学のターゲット値: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS) |