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基本情報
登録情報 | データベース: PDB / ID: 7klc | ||||||
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タイトル | Crystal structure of M4H2K1 Fab bound to HIV-1 BG505 gp120 core and to 17b Fab | ||||||
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![]() | VIRAL PROTEIN/IMMUNE SYSTEM / mouse antibody / immune system / anti-HIV1 neutralizing antibody / VIRAL PROTEIN-IMMUNE SYSTEM complex | ||||||
機能・相同性 | ![]() positive regulation of plasma membrane raft polarization / positive regulation of receptor clustering / positive regulation of establishment of T cell polarity / host cell endosome membrane / clathrin-dependent endocytosis of virus by host cell / viral protein processing / fusion of virus membrane with host plasma membrane / virus-mediated perturbation of host defense response / fusion of virus membrane with host endosome membrane / viral envelope ...positive regulation of plasma membrane raft polarization / positive regulation of receptor clustering / positive regulation of establishment of T cell polarity / host cell endosome membrane / clathrin-dependent endocytosis of virus by host cell / viral protein processing / fusion of virus membrane with host plasma membrane / virus-mediated perturbation of host defense response / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / host cell plasma membrane / structural molecule activity / virion membrane / plasma membrane 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() ![]() ![]() ![]() | ||||||
手法 | ![]() ![]() ![]() | ||||||
![]() | Kumar, S. / Wilson, I.A. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Neutralizing Antibodies Induced by First-Generation gp41-Stabilized HIV-1 Envelope Trimers and Nanoparticles. 著者: Sonu Kumar / Xiaohe Lin / Timothy Ngo / Benjamin Shapero / Cindy Sou / Joel D Allen / Jeffrey Copps / Lei Zhang / Gabriel Ozorowski / Linling He / Max Crispin / Andrew B Ward / Ian A Wilson / Jiang Zhu / ![]() ![]() 要旨: The immunogenicity of gp41-stabilized HIV-1 BG505 envelope (Env) trimers and nanoparticles (NPs) was recently assessed in mice and rabbits. Here, we combined Env-specific B-cell sorting and ...The immunogenicity of gp41-stabilized HIV-1 BG505 envelope (Env) trimers and nanoparticles (NPs) was recently assessed in mice and rabbits. Here, we combined Env-specific B-cell sorting and repertoire sequencing to identify neutralizing antibodies (NAbs) from immunized animals. A panel of mouse NAbs was isolated from mice immunized with a 60-meric I3-01 NP presenting 20 stabilized trimers. Three mouse NAbs potently neutralized BG505.T332N by recognizing a glycan epitope centered in the C3/V4 region on BG505 Env, as revealed by electron microscopy (EM), X-ray crystallography, and epitope mapping. A set of rabbit NAbs was isolated from rabbits immunized with a soluble trimer and a 24-meric ferritin NP presenting 8 trimers. Neutralization assays against BG505.T332N variants confirmed that potent rabbit NAbs targeted previously described glycan holes on BG505 Env and accounted for a significant portion of the autologous NAb response in both the trimer and ferritin NP groups. Last, we examined NAb responses that were induced by non-BG505 Env immunogens. We determined a 3.4-Å-resolution crystal structure for the clade C transmitted/founder (T/F) Du172.17 Env with a redesigned heptad repeat 1 (HR1) bend in gp41. This clade C Env, in a soluble trimer form and in a multivalent form with 8 trimers attached to ferritin NP, and the gp41-stabilized clade A Q482-d12 Env trimer elicited distinct NAb responses in rabbits, with notable differences in neutralization breadth. Although eliciting a broad NAb response remains a major challenge, our study provides valuable information on an HIV-1 vaccine design strategy that combines gp41 stabilization and NP display. Self-assembling protein nanoparticles (NPs) presenting BG505 envelope (Env) trimers can elicit tier 2 HIV-1-neutralizing antibody (NAb) responses more effectively than soluble trimers. In the present study, monoclonal NAbs were isolated from previously immunized mice and rabbits for structural and functional analyses, which revealed that potent mouse NAbs recognize the C3/V4 region and small NP-elicited rabbit NAbs primarily target known glycan holes on BG505 Env. This study validates the gp41 stabilization strategy for HIV-1 Env vaccine design and highlights the challenge in eliciting a broad NAb response. | ||||||
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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 | ![]() | 266.7 KB | 表示 | ![]() |
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PDB形式 | ![]() | 203.9 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 | ![]() | 1.7 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.7 MB | 表示 | |
XML形式データ | ![]() | 44.5 KB | 表示 | |
CIF形式データ | ![]() | 60 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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単位格子 |
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要素
-タンパク質 , 1種, 1分子 A
#5: タンパク質 | 分子量: 42305.840 Da / 分子数: 1 Fragment: UNP residues 43-126,194-489,UNP residues 43-126,194-489,UNP residues 43-126,194-489,UNP residues 43-126,194-489 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 遺伝子: env / 発現宿主: ![]() |
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-抗体 , 4種, 4分子 HLCD
#1: 抗体 | 分子量: 24216.145 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
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#2: 抗体 | 分子量: 23805.518 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
#3: 抗体 | 分子量: 23399.898 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
#4: 抗体 | 分子量: 24411.336 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
-糖 , 4種, 12分子 ![](data/chem/img/NAG.gif)
#6: 多糖 | #7: 多糖 | alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | #8: 多糖 | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | #9: 糖 | ChemComp-NAG / |
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-詳細
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: ![]() |
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試料調製
結晶 | マシュー密度: 3.78 Å3/Da / 溶媒含有率: 67.43 % |
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結晶化 | 温度: 293.15 K / 手法: 蒸気拡散法, シッティングドロップ法 詳細: 0.1M Tris, pH 7, 1.825 M ammonium sulfate, 0.29 M lithium sulfate, 15% ethylene glycol |
-データ収集
回折 | 平均測定温度: 100 K / Serial crystal experiment: N |
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放射光源 | 由来: ![]() ![]() ![]() |
検出器 | タイプ: DECTRIS EIGER X 16M / 検出器: PIXEL / 日付: 2019年11月26日 |
放射 | モノクロメーター: Double crystal cryo-cooled Si(111) 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 | 波長: 1.033 Å / 相対比: 1 |
反射 | 解像度: 4.3→50 Å / Num. obs: 12843 / % possible obs: 86.8 % / 冗長度: 8.5 % / Biso Wilson estimate: 138.69 Å2 / CC1/2: 0.86 / Net I/σ(I): 13 |
反射 シェル | 解像度: 4.3→4.37 Å / Num. unique obs: 280 / CC1/2: 0.39 |
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解析
ソフトウェア |
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精密化 | 構造決定の手法: ![]() 開始モデル: PDB entries 6ONF & 1GC1 解像度: 4.3→43.04 Å / SU ML: 0.6687 / 交差検証法: FREE R-VALUE / σ(F): 1.35 / 位相誤差: 41.5336 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2
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溶媒の処理 | 減衰半径: 0.9 Å / VDWプローブ半径: 1.11 Å / 溶媒モデル: FLAT BULK SOLVENT MODEL | |||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 169.05 Å2 | |||||||||||||||||||||||||||||||||||
精密化ステップ | サイクル: LAST / 解像度: 4.3→43.04 Å
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拘束条件 |
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LS精密化 シェル |
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