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基本情報
登録情報 | データベース: PDB / ID: 8v3j | ||||||
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タイトル | Structure-Based Engineering of a Highly Immunogenic, Conformationally Stabilized FimH Antigen for a Urinary Tract Infection Vaccine | ||||||
![]() | Type 1 fimbrin D-mannose specific adhesin,Protein FimG | ||||||
![]() | CELL ADHESION / TYPE I PILUS / CATCH-BOND / LECTIN / UPEC / BACTERIAL ADHESIN / UTI / MANNOSE | ||||||
機能・相同性 | ![]() pilus tip / mechanosensory behavior / cell adhesion involved in single-species biofilm formation / pilus / cell-substrate adhesion / D-mannose binding / host cell membrane / cell adhesion 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() | ||||||
手法 | ![]() ![]() ![]() | ||||||
![]() | Jasti, J. | ||||||
資金援助 | 1件
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![]() | ![]() タイトル: Structure-based design of an immunogenic, conformationally stabilized FimH antigen for a urinary tract infection vaccine. 著者: Natalie C Silmon de Monerri / Ye Che / Joshua A Lees / Jayasankar Jasti / Huixian Wu / Matthew C Griffor / Srinivas Kodali / Julio Cesar Hawkins / Jacqueline Lypowy / Christopher Ponce / ...著者: Natalie C Silmon de Monerri / Ye Che / Joshua A Lees / Jayasankar Jasti / Huixian Wu / Matthew C Griffor / Srinivas Kodali / Julio Cesar Hawkins / Jacqueline Lypowy / Christopher Ponce / Kieran Curley / Alexandre Esadze / Juan Carcamo / Thomas McLellan / David Keeney / Arthur Illenberger / Yury V Matsuka / Suman Shanker / Laurent Chorro / Alexey V Gribenko / Seungil Han / Annaliesa S Anderson / Robert G K Donald / ![]() 要旨: Adhesion of E. coli to the urinary tract epithelium is a critical step in establishing urinary tract infections. FimH is an adhesin positioned on the fimbrial tip which binds to mannosylated proteins ...Adhesion of E. coli to the urinary tract epithelium is a critical step in establishing urinary tract infections. FimH is an adhesin positioned on the fimbrial tip which binds to mannosylated proteins on the urinary tract epithelium via its lectin domain (FimHLD). FimH is of interest as a target of vaccines to prevent urinary tract infections (UTI). Previously, difficulties in obtaining purified recombinant FimH from E. coli along with the poor inherent immunogenicity of FimH have hindered the development of effective FimH vaccine candidates. To overcome these challenges, we have devised a novel production method using mammalian cells to produce high yields of homogeneous FimH protein with comparable biochemical and immunogenic properties to FimH produced in E. coli. Next, to optimize conformational stability and immunogenicity of FimH, we used a computational approach to design improved FimH mutants and evaluated their biophysical and biochemical properties, and murine immunogenicity using a bacterial adhesion inhibition assay. This approach identified an immunogenic FimH variant (FimH-donor-strand complemented with FimG peptide 'triple mutant', FimH-DSG TM) capable of blocking bacterial adhesion that is produced at high yields in mammalian cells. By x-ray crystallography, we confirmed that the stabilized structure of the FimHLD in FimH-DSG TM is similar to native FimH on the fimbrial tip. Characterization of monoclonal antibodies elicited by FimH-DSG that can block bacterial binding to mannosylated surfaces identified 4 non-overlapping binding sites whose epitopes were mapped via a combinatorial cryogenic electron microscopy approach. Novel inhibitory epitopes in the lectin binding FimH were identified, revealing diverse functional mechanisms of FimH-directed antibodies with relevance to FimH-targeted UTI vaccines. | ||||||
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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 | ![]() | 419 KB | 表示 | ![]() |
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PDB形式 | ![]() | 342.5 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 | ![]() | 478.9 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 488.2 KB | 表示 | |
XML形式データ | ![]() | 55.1 KB | 表示 | |
CIF形式データ | ![]() | 76.5 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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Components on special symmetry positions |
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要素
#1: タンパク質 | 分子量: 32118.596 Da / 分子数: 4 / 変異: N7S,G15A,G16A,V27A,N70S,N228Q / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #2: 糖 | ChemComp-NAG / #3: 水 | ChemComp-HOH / | 研究の焦点であるリガンドがあるか | N | Has protein modification | Y | |
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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: 3.09 Å3/Da / 溶媒含有率: 60.25 % |
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結晶化 | 温度: 293 K / 手法: 蒸気拡散法, シッティングドロップ法 / pH: 4.5 / 詳細: 0.1 M Sodium Acetate (pH 4.5), 25% (w/v) PEG 3350 |
-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 9M / 検出器: PIXEL / 日付: 2020年9月24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: 1 Å / 相対比: 1 |
反射 | 解像度: 1.898→87.086 Å / Num. obs: 86513 / % possible obs: 91 % / 冗長度: 3.5 % / CC1/2: 0.998 / Net I/σ(I): 15.1 |
反射 シェル | 解像度: 2.161→2.168 Å / 冗長度: 2.9 % / Num. unique obs: 829 / CC1/2: 0.739 / % possible all: 97.8 |
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解析
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精密化 | 構造決定の手法: ![]()
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原子変位パラメータ | Biso mean: 41.68 Å2
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Refine analyze | Luzzati coordinate error obs: 0.3 Å | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
精密化ステップ | サイクル: LAST / 解像度: 1.898→27.5 Å
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拘束条件 |
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LS精密化 シェル | 解像度: 1.9→1.99 Å / Total num. of bins used: 51
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精密化 TLS | 手法: refined / Refine-ID: X-RAY DIFFRACTION
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精密化 TLSグループ |
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