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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 8v93 | ||||||||||||||||||||||||
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タイトル | Cryo-EM structure of E. coli FimH lectin domain bound to Fabs 329-2 and 454-3 | ||||||||||||||||||||||||
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![]() | CELL ADHESION/IMMUNE SYSTEM / Bacterial proteins / lectin domain / Fab / urinary tract infections / CELL ADHESION-IMMUNE SYSTEM complex | ||||||||||||||||||||||||
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 | 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: 3.12 Å | ||||||||||||||||||||||||
![]() | Lees, J.A. / Han, S. | ||||||||||||||||||||||||
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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ダウンロードとリンク
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ダウンロード
PDBx/mmCIF形式 | ![]() | 127.8 KB | 表示 | ![]() |
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PDB形式 | ![]() | 91.7 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 | ![]() | 1.2 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.2 MB | 表示 | |
XML形式データ | ![]() | 32.6 KB | 表示 | |
CIF形式データ | ![]() | 47.5 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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要素
#1: 抗体 | 分子量: 23940.627 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: 24103.885 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: 23512.791 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() |
#4: タンパク質 | 分子量: 32118.596 Da / 分子数: 1 / Mutation: N7S, G15A, G16A, V27A, N70S, N228Q within FimH / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 発現宿主: ![]() ![]() 参照: UniProt: P08191, UniProt: P08190 |
#5: 抗体 | 分子量: 23611.023 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() |
Has protein modification | Y |
-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: Ternary complex of E. coli FimH with Fabs 329-2 and 454-3 タイプ: COMPLEX / Entity ID: #2, #1, #5, #3-#4 / 由来: RECOMBINANT |
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分子量 | 実験値: NO |
由来(天然) | 生物種: ![]() ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.5 |
試料 | 濃度: 0.25 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: 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: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2400 nm / 最小 デフォーカス(公称値): 600 nm |
撮影 | 電子線照射量: 49 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) |
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解析
EMソフトウェア | 名称: PHENIX / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.12 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 80368 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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