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基本情報
登録情報 | データベース: PDB / ID: 9nb4 | ||||||||||||
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タイトル | Serial synchrotron X-ray diffraction structure of papain microcrystals soaked with natural product E-64-A65 | ||||||||||||
![]() | Papain | ||||||||||||
![]() | HYDROLASE / Inhibitor / Complex / Enzyme / Serial | ||||||||||||
機能・相同性 | ![]() | ||||||||||||
生物種 | ![]() ![]() | ||||||||||||
手法 | ![]() ![]() ![]() | ||||||||||||
![]() | Vlahakis, N.W. / Summers, J.A. / Wakatsuki, S. / Rodriguez, J.A. | ||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Combining MicroED and native mass spectrometry for structural discovery of enzyme-biosynthetic inhibitor complexes. 著者: Niko W Vlahakis / Cameron W Flowers / Mengting Liu / Matthew Agdanowski / Samuel Johnson / Jacob A Summers / Catherine Keyser / Phoebe Russell / Samuel Rose / Julien Orlans / Nima Adhami / Yu ...著者: Niko W Vlahakis / Cameron W Flowers / Mengting Liu / Matthew Agdanowski / Samuel Johnson / Jacob A Summers / Catherine Keyser / Phoebe Russell / Samuel Rose / Julien Orlans / Nima Adhami / Yu Chen / Michael R Sawaya / Shibom Basu / Daniele de Sanctis / Soichi Wakatsuki / Hosea M Nelson / Joseph A Loo / Yi Tang / Jose A Rodriguez / ![]() ![]() 要旨: With the goal of accelerating the discovery of small molecule-protein complexes, we leverage fast, low-dose, event based electron counting microcrystal electron diffraction (MicroED) data collection ...With the goal of accelerating the discovery of small molecule-protein complexes, we leverage fast, low-dose, event based electron counting microcrystal electron diffraction (MicroED) data collection and native mass spectrometry. This approach resolves structures of the epoxide-based cysteine protease inhibitor, and natural product, E-64, and its biosynthetic analogs bound to the model cysteine protease, papain. The combined structural power of MicroED and the analytical capabilities of native mass spectrometry (ED-MS) allows assignment of papain structures bound to E-64-like ligands with data obtained from crystal slurries soaked with mixtures of known inhibitors, and crude biosynthetic reactions. ED-MS further discriminates the highest-affinity ligand soaked into microcrystals from a broad inhibitor cocktail, and identifies multiple similarly high-affinity ligands soaked into microcrystals simultaneously. This extends to libraries of printed ligands dispensed directly onto TEM grids and later soaked with papain microcrystal slurries. ED-MS identifies papain binding to its preferred natural products, by showing that two analogues of E-64 outcompete others in binding to papain crystals, and by detecting papain bound to E-64 and an analogue from crude biosynthetic reactions, without purification. This illustrates the utility of ED-MS for natural product ligand discovery and for structure-based screening of small molecule binders to macromolecular targets. | ||||||||||||
履歴 |
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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 | ![]() | 60.5 KB | 表示 | ![]() |
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その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 9n9dC ![]() 9naeC ![]() 9nagC ![]() 9naoC ![]() 9narC ![]() 9natC ![]() 9naxC ![]() 9nayC ![]() 9nb2C ![]() 9nb7C ![]() 9nbfC ![]() 9nbjC ![]() 9nbkC ![]() 9nbnC ![]() 9nbpC ![]() 9nbqC ![]() 9nc1C ![]() 9ncaC C: 同じ文献を引用 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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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
#1: タンパク質 | 分子量: 23452.301 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
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#2: 化合物 | ChemComp-A1AXI / ( 分子量: 371.472 Da / 分子数: 1 / 由来タイプ: 合成 / 式: C18H33N3O5 |
#3: 水 | ChemComp-HOH / |
研究の焦点であるリガンドがあるか | Y |
Has protein modification | Y |
-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: 2.25 Å3/Da / 溶媒含有率: 45.3 % |
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結晶化 | 温度: 298 K / 手法: 蒸気拡散法, シッティングドロップ法 詳細: 889 mM NaCl, 59% methanol in reservoir. 66% methanol in sitting drop. |
-データ収集
回折 | 平均測定温度: 298 K / Serial crystal experiment: Y |
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放射光源 | 由来: ![]() ![]() ![]() |
検出器 | タイプ: PSI JUNGFRAU 4M / 検出器: PIXEL / 日付: 2024年11月5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: 1.072 Å / 相対比: 1 |
反射 | 解像度: 1.8→44.05 Å / Num. obs: 37928 / % possible obs: 100 % / 冗長度: 332.9 % / CC1/2: 0.951 / CC star: 0.987 / R split: 0.186 / Net I/σ(I): 4.9 |
反射 シェル | 解像度: 1.8→1.83 Å / 冗長度: 235.02 % / Num. unique obs: 1877 / CC1/2: 0.422 / CC star: 0.77 / R split: 0.796 / % possible all: 100 |
Serial crystallography sample delivery | 手法: fixed target |
Serial crystallography sample delivery fixed target | 解説: mylar foils |
Serial crystallography data reduction | Crystal hits: 25777 / Frames indexed: 22420 / Lattices indexed: 24052 |
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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: ![]()
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溶媒の処理 | 減衰半径: 0.9 Å / VDWプローブ半径: 1.1 Å / 溶媒モデル: FLAT BULK SOLVENT MODEL | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
精密化ステップ | サイクル: LAST / 解像度: 1.8→44.05 Å
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拘束条件 |
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LS精密化 シェル |
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