+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6vfl | |||||||||
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タイトル | BG505-SOSIP model reconstructed by subparticle extraction and refinement from a tetrahedral nanoparticle T33_dn10 | |||||||||
要素 |
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キーワード | DE NOVO PROTEIN / Nanoparticle / Rosetta / De novo protein design / HIV Env | |||||||||
生物種 | synthetic construct (人工物) | |||||||||
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: 4.14 Å | |||||||||
データ登録者 | Antanasijevic, A. / Ward, A.B. | |||||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: PLoS Pathog / 年: 2020 タイトル: Structural and functional evaluation of de novo-designed, two-component nanoparticle carriers for HIV Env trimer immunogens. 著者: Aleksandar Antanasijevic / George Ueda / Philip J M Brouwer / Jeffrey Copps / Deli Huang / Joel D Allen / Christopher A Cottrell / Anila Yasmeen / Leigh M Sewall / Ilja Bontjer / Thomas J ...著者: Aleksandar Antanasijevic / George Ueda / Philip J M Brouwer / Jeffrey Copps / Deli Huang / Joel D Allen / Christopher A Cottrell / Anila Yasmeen / Leigh M Sewall / Ilja Bontjer / Thomas J Ketas / Hannah L Turner / Zachary T Berndsen / David C Montefiori / Per Johan Klasse / Max Crispin / David Nemazee / John P Moore / Rogier W Sanders / Neil P King / David Baker / Andrew B Ward / 要旨: Two-component, self-assembling nanoparticles represent a versatile platform for multivalent presentation of viral antigens. Computational design of protein nanoparticles with differing sizes and ...Two-component, self-assembling nanoparticles represent a versatile platform for multivalent presentation of viral antigens. Computational design of protein nanoparticles with differing sizes and geometries enables combination with antigens of choice to test novel multimerization concepts in immunization strategies where the goal is to improve the induction and maturation of neutralizing antibody lineages. Here, we describe detailed antigenic, structural, and functional characterization of computationally designed tetrahedral, octahedral, and icosahedral nanoparticle immunogens displaying trimeric HIV envelope glycoprotein (Env) ectodomains. Env trimers, based on subtype A (BG505) or consensus group M (ConM) sequences and engineered with SOSIP stabilizing mutations, were fused to an underlying trimeric building block of each nanoparticle. Initial screening yielded one icosahedral and two tetrahedral nanoparticle candidates, capable of presenting twenty or four copies of the Env trimer. A number of analyses, including detailed structural characterization by cryo-EM, demonstrated that the nanoparticle immunogens possessed the intended structural and antigenic properties. When the immunogenicity of ConM-SOSIP trimers presented on a two-component tetrahedral nanoparticle or as soluble proteins were compared in rabbits, the two immunogens elicited similar serum antibody binding titers against the trimer component. Neutralizing antibody titers were slightly elevated in the animals given the nanoparticle immunogen and were initially more focused to the trimer apex. Altogether, our findings indicate that tetrahedral nanoparticles can be successfully applied for presentation of HIV Env trimer immunogens; however, the optimal implementation to different immunization strategies remains to be determined. | |||||||||
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 | 6vfl.cif.gz | 370.9 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6vfl.ent.gz | 321 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6vfl.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 | 6vfl_validation.pdf.gz | 2.9 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 6vfl_full_validation.pdf.gz | 2.9 MB | 表示 | |
XML形式データ | 6vfl_validation.xml.gz | 58.8 KB | 表示 | |
CIF形式データ | 6vfl_validation.cif.gz | 88.3 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/vf/6vfl ftp://data.pdbj.org/pub/pdb/validation_reports/vf/6vfl | 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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1 |
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-要素
#1: タンパク質 | 分子量: 56863.668 Da / 分子数: 3 / 由来タイプ: 組換発現 / 由来: (組換発現) synthetic construct (人工物) / プラスミド: pPPI4 / 細胞株 (発現宿主): HEK293F / 発現宿主: Homo sapiens (ヒト) #2: タンパク質 | 分子量: 17198.387 Da / 分子数: 3 / 由来タイプ: 組換発現 / 由来: (組換発現) synthetic construct (人工物) / プラスミド: pPPI4 / 細胞株 (発現宿主): HEK293F / 発現宿主: Homo sapiens (ヒト) #3: 多糖 | #4: 多糖 | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #5: 糖 | ChemComp-NAG / 研究の焦点であるリガンドがあるか | N | |
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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: BG505-SOSIP reconstructed from the tetrahedral nanoparticle T33_dn10 by subparticle extraction and refinement タイプ: COMPLEX 詳細: Nanoparticle is assembled by combining equimolar amounts of BG505-SOSIP-T33_dn10A and T33_dn10B and subsequent incubation. EM map of the full nanoparticle can be found elsewhere (D_1000246183) ...詳細: Nanoparticle is assembled by combining equimolar amounts of BG505-SOSIP-T33_dn10A and T33_dn10B and subsequent incubation. EM map of the full nanoparticle can be found elsewhere (D_1000246183). Signal originating from the nanoparticle was subtracted and BG505-SOSIP antigens are extracted as independent subparticles Entity ID: #1-#2 / 由来: MULTIPLE SOURCES | |||||||||||||||
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分子量 | 単位: MEGADALTONS / 実験値: NO | |||||||||||||||
由来(天然) | 生物種: synthetic construct (人工物) | |||||||||||||||
由来(組換発現) | 生物種: Homo sapiens (ヒト) / 株: HEK293F / プラスミド: pPPI4 | |||||||||||||||
緩衝液 | pH: 7.4 / 詳細: TBS buffer, pH 7.4 | |||||||||||||||
緩衝液成分 |
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試料 | 濃度: 1.6 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES 詳細: Nanoparticle is assembled by combining equimolar amounts of BG505-SOSIP-T33_dn10A and T33_dn10B and subsequent incubation. Nanoparticle is purified from unassembled components by SEC. Sample ...詳細: Nanoparticle is assembled by combining equimolar amounts of BG505-SOSIP-T33_dn10A and T33_dn10B and subsequent incubation. Nanoparticle is purified from unassembled components by SEC. Sample is then concentrated to 1.6mg/ml in TBS buffer. | |||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 400 divisions/in. / グリッドのタイプ: Quantifoil R2/1 | |||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 283 K 詳細: Blotting time varied in the 3-7 s range, Blotting force set to 0, Wait time of 10s. |
-電子顕微鏡撮影
実験機器 | モデル: Talos Arctica / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TALOS ARCTICA |
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): 36000 X / 最大 デフォーカス(公称値): 2000 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: OTHER |
撮影 | 平均露光時間: 11.25 sec. / 電子線照射量: 49.39 e/Å2 / 検出モード: COUNTING フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 撮影したグリッド数: 1 / 実像数: 798 |
画像スキャン | 動画フレーム数/画像: 45 |
-解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING ONLY | ||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 324420 詳細: 81105 T33_dn10 tetrahedral nanoparticles (each carrying 4 copies of BG505-SOSIP antigen) have been 3D aligned in Relion. Particles have been aligned and refined using tetrahedral symmetry. ...詳細: 81105 T33_dn10 tetrahedral nanoparticles (each carrying 4 copies of BG505-SOSIP antigen) have been 3D aligned in Relion. Particles have been aligned and refined using tetrahedral symmetry. Localized reconstruction v1.2 was then applied to extract the BG505-SOSIP trimeric subparticles, resulting in a total of 324420 starting particles. The full nanoparticle reconstruction can be found elsewhere (EMD-21185). | ||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C3 (3回回転対称) | ||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 4.14 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 84435 / アルゴリズム: BACK PROJECTION / クラス平均像の数: 1 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT / 空間: REAL 詳細: Model refinement was performed by iterating between Rosetta relaxed refinement and manual refinement in Coot. | ||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 5CEZ |