+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8vbn | ||||||
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タイトル | Structure of bovine anti-HIV Fab ElsE8 | ||||||
要素 |
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キーワード | IMMUNE SYSTEM / antibody / Fab fragment / bovine | ||||||
生物種 | Bos taurus (ウシ) | ||||||
手法 | X線回折 / シンクロトロン / 分子置換 / 解像度: 1.83 Å | ||||||
データ登録者 | Stanfield, R.L. / Wilson, I.A. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: PLoS Pathog / 年: 2024 タイトル: Immunization of cows with HIV envelope trimers generates broadly neutralizing antibodies to the V2-apex from the ultralong CDRH3 repertoire. 著者: Pilar X Altman / Gabriel Ozorowski / Robyn L Stanfield / Jeremy Haakenson / Michael Appel / Mara Parren / Wen-Hsin Lee / Huldah Sang / Jordan Woehl / Karen Saye-Francisco / Leigh M Sewall / ...著者: Pilar X Altman / Gabriel Ozorowski / Robyn L Stanfield / Jeremy Haakenson / Michael Appel / Mara Parren / Wen-Hsin Lee / Huldah Sang / Jordan Woehl / Karen Saye-Francisco / Leigh M Sewall / Collin Joyce / Ge Song / Katelyn Porter / Elise Landais / Raiees Andrabi / Ian A Wilson / Andrew B Ward / Waithaka Mwangi / Vaughn V Smider / Dennis R Burton / Devin Sok / 要旨: The generation of broadly neutralizing antibodies (bnAbs) to conserved epitopes on HIV Envelope (Env) is one of the cornerstones of HIV vaccine research. The animal models commonly used for HIV do ...The generation of broadly neutralizing antibodies (bnAbs) to conserved epitopes on HIV Envelope (Env) is one of the cornerstones of HIV vaccine research. The animal models commonly used for HIV do not reliably produce a potent broadly neutralizing serum antibody response, with the exception of cows. Cows have previously produced a CD4 binding site response by homologous prime and boosting with a native-like Env trimer. In small animal models, other engineered immunogens were shown to focus antibody responses to the bnAb V2-apex region of Env. Here, we immunized two groups of cows (n = 4) with two regimens of V2-apex focusing Env immunogens to investigate whether antibody responses could be generated to the V2-apex on Env. Group 1 was immunized with chimpanzee simian immunodeficiency virus (SIV)-Env trimer that shares its V2-apex with HIV, followed by immunization with C108, a V2-apex focusing immunogen, and finally boosted with a cross-clade native-like trimer cocktail. Group 2 was immunized with HIV C108 Env trimer followed by the same HIV trimer cocktail as Group 1. Longitudinal serum analysis showed that one cow in each group developed serum neutralizing antibody responses to the V2-apex. Eight and 11 bnAbs were isolated from Group 1 and Group 2 cows, respectively, and showed moderate breadth and potency. Potent and broad responses in this study developed much later than previous cow immunizations that elicited CD4bs bnAbs responses and required several different immunogens. All isolated bnAbs were derived from the ultralong CDRH3 repertoire. The finding that cow antibodies can target more than one broadly neutralizing epitope on the HIV surface reveals the generality of elongated structures for the recognition of highly glycosylated proteins. The exclusive isolation of ultralong CDRH3 bnAbs, despite only comprising a small percent of the cow repertoire, suggests these antibodies outcompete the long and short CDRH3 antibodies during the bnAb response. | ||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8vbn.cif.gz | 414.8 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8vbn.ent.gz | 274.8 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8vbn.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 | 8vbn_validation.pdf.gz | 450 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8vbn_full_validation.pdf.gz | 460.4 KB | 表示 | |
XML形式データ | 8vbn_validation.xml.gz | 46.2 KB | 表示 | |
CIF形式データ | 8vbn_validation.cif.gz | 63.2 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/vb/8vbn ftp://data.pdbj.org/pub/pdb/validation_reports/vb/8vbn | 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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2 |
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単位格子 |
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-要素
#1: 抗体 | 分子量: 22527.611 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Bos taurus (ウシ) / 細胞株 (発現宿主): expi293F / 器官 (発現宿主): kidney / 発現宿主: Homo sapiens (ヒト) #2: 抗体 | 分子量: 28076.264 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Bos taurus (ウシ) / 細胞株 (発現宿主): expi293F / 器官 (発現宿主): kidney / 発現宿主: Homo sapiens (ヒト) #3: 水 | ChemComp-HOH / | Has protein modification | Y | |
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-実験情報
-実験
実験 | 手法: X線回折 / 使用した結晶の数: 1 |
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-試料調製
結晶 | マシュー密度: 2.79 Å3/Da / 溶媒含有率: 55.85 % |
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結晶化 | 温度: 277 K / 手法: 蒸気拡散法, シッティングドロップ法 / 詳細: 20% Peg3350, 0.2M KCl |
-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: シンクロトロン / サイト: ALS / ビームライン: 5.0.1 / 波長: 0.97741 Å |
検出器 | タイプ: DECTRIS PILATUS3 2M / 検出器: PIXEL / 日付: 2021年10月15日 |
放射 | 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: 0.97741 Å / 相対比: 1 |
反射 | 解像度: 1.83→46.95 Å / Num. obs: 95655 / % possible obs: 99.8 % / Observed criterion σ(F): 0 / Observed criterion σ(I): -3 / 冗長度: 12.8 % / Biso Wilson estimate: 26.3 Å2 / CC1/2: 0.999 / Rmerge(I) obs: 0.116 / Rpim(I) all: 0.033 / Rrim(I) all: 0.12 / Net I/σ(I): 15.9 |
反射 シェル | 解像度: 1.83→1.9 Å / 冗長度: 9.8 % / Rmerge(I) obs: 1.73 / Mean I/σ(I) obs: 1.3 / Num. unique obs: 9259 / CC1/2: 0.508 / Rpim(I) all: 0.575 / Rrim(I) all: 1.83 / % possible all: 98.2 |
-解析
ソフトウェア |
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精密化 | 構造決定の手法: 分子置換 / 解像度: 1.83→46.95 Å / SU ML: 0.1997 / 交差検証法: FREE R-VALUE / σ(F): 1.34 / 位相誤差: 21.3998 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: 38.35 Å2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
精密化ステップ | サイクル: LAST / 解像度: 1.83→46.95 Å
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拘束条件 |
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LS精密化 シェル |
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