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基本情報
登録情報 | データベース: PDB / ID: 9gzt | ||||||||||||||||||||||||
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タイトル | WT-IAPP cryo-EM structure Type LLUU - control reaction | ||||||||||||||||||||||||
![]() | Islet amyloid polypeptide | ||||||||||||||||||||||||
![]() | PROTEIN FIBRIL / Amyloid / IAPP / amylin / aggregation / type-2 diabetes / polymorph | ||||||||||||||||||||||||
機能・相同性 | ![]() amylin receptor 3 signaling pathway / amylin receptor 2 signaling pathway / amylin receptor 1 signaling pathway / amylin receptor signaling pathway / Calcitonin-like ligand receptors / negative regulation of amyloid fibril formation / negative regulation of bone resorption / eating behavior / negative regulation of osteoclast differentiation / Regulation of gene expression in beta cells ...amylin receptor 3 signaling pathway / amylin receptor 2 signaling pathway / amylin receptor 1 signaling pathway / amylin receptor signaling pathway / Calcitonin-like ligand receptors / negative regulation of amyloid fibril formation / negative regulation of bone resorption / eating behavior / negative regulation of osteoclast differentiation / Regulation of gene expression in beta cells / positive regulation of cAMP/PKA signal transduction / bone resorption / negative regulation of protein-containing complex assembly / sensory perception of pain / osteoclast differentiation / positive regulation of calcium-mediated signaling / hormone activity / cell-cell signaling / amyloid-beta binding / G alpha (s) signalling events / positive regulation of MAPK cascade / positive regulation of apoptotic process / receptor ligand activity / Amyloid fiber formation / signaling receptor binding / neuronal cell body / apoptotic process / lipid binding / signal transduction / extracellular space / extracellular region / identical protein binding 類似検索 - 分子機能 | ||||||||||||||||||||||||
生物種 | ![]() | ||||||||||||||||||||||||
手法 | 電子顕微鏡法 / らせん対称体再構成法 / クライオ電子顕微鏡法 / 解像度: 2.9 Å | ||||||||||||||||||||||||
![]() | Wilkinson, M. / Taylor, A.I.P. / Xu, Y. / Chakraborty, P. / Brinkworth, A. / Willis, L.F. / Zhuravleva, A. / Ranson, N.A. / Foster, R. / Radford, S.E. | ||||||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Kinetic Steering of Amyloid Formation and Polymorphism by Canagliflozin, a Type-2 Diabetes Drug. 著者: Alexander I P Taylor / Yong Xu / Martin Wilkinson / Pijush Chakraborty / Alice Brinkworth / Leon F Willis / Anastasia Zhuravleva / Neil A Ranson / Richard Foster / Sheena E Radford / ![]() 要旨: Amyloid formation is involved in widespread health conditions such as Alzheimer's disease, Parkinson's disease, and type-2 diabetes. Amyloid fibrils have a similar cross-β architecture, but fibrils ...Amyloid formation is involved in widespread health conditions such as Alzheimer's disease, Parkinson's disease, and type-2 diabetes. Amyloid fibrils have a similar cross-β architecture, but fibrils formed by a single protein sequence can have diverse structures, varying with time, self-assembly conditions, and sequence modifications. Fibril structure has been proposed to be diagnostic of disease, but why different structures result under different conditions, especially in vitro, remains elusive. We previously identified a small molecule, YX-I-1, which inhibits in vitro amyloid formation by islet amyloid polypeptide (IAPP), a peptide hormone whose amyloid formation is involved in type-2 diabetes. Here, using YX-I-1 as a lead, we identified regulator-approved drugs with similar structures by chemical similarity analysis and substructure searches and monitored the effect of 24 of these potential ligands on IAPP amyloid assembly in vitro. We show that one such compound, canagliflozin (Invokana), a type-2 diabetes drug already in clinical use, can strongly delay the kinetics of IAPP amyloid formation, an activity independent of its intended mode of action [sodium-glucose linked transporter 2 (SGLT2) inhibitor] that may have important therapeutic implications. Combining analysis of amyloid self-assembly kinetics, biophysical characterization of monomer and fibril binding, and cryo-EM of the assembly products, we show that YX-I-1 and canagliflozin target IAPP early in aggregation, remodeling the energy landscape of primary nucleation and profoundly altering the resulting fibril structures. Early binding events thus imprint long-lasting effects on the amyloid structures that form. | ||||||||||||||||||||||||
履歴 |
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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 | ![]() | 97 KB | 表示 | ![]() |
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PDB形式 | ![]() | 74.4 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
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 | ![]() 51734MC ![]() 9gz6C ![]() 9gzpC ![]() 9gzsC ![]() 9gzwC ![]() 9gzxC ![]() 9gzyC C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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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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要素
#1: タンパク質・ペプチド | 分子量: 3907.312 Da / 分子数: 24 / 由来タイプ: 合成 / 詳細: Synthesised with C-terminal amidation / 由来: (合成) ![]() 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: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: FILAMENT / 3次元再構成法: らせん対称体再構成法 |
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試料調製
構成要素 | 名称: Amyloid fibril with helical symmetry / タイプ: COMPLEX / Entity ID: all / 由来: NATURAL | |||||||||||||||
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分子量 | 実験値: NO | |||||||||||||||
由来(天然) | 生物種: synthetic construct (人工物) | |||||||||||||||
緩衝液 | pH: 7.4 | |||||||||||||||
緩衝液成分 |
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試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: 30 uM IAPP | |||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: EMS Lacey Carbon | |||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 90 % / 凍結前の試料温度: 279 K |
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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: TFS 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): 1200 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm / アライメント法: COMA FREE |
試料ホルダ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 電子線照射量: 43 e/Å2 フィルム・検出器のモデル: TFS FALCON 4i (4k x 4k) 撮影したグリッド数: 1 / 実像数: 2927 |
画像スキャン | 横: 4096 / 縦: 4096 |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||||||||
らせん対称 | 回転角度/サブユニット: 179.46 ° / 軸方向距離/サブユニット: 2.43 Å / らせん対称軸の対称性: C1 | ||||||||||||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 749724 | ||||||||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 2.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 12136 / 対称性のタイプ: HELICAL | ||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 28 / プロトコル: FLEXIBLE FIT / 空間: REAL / Target criteria: cross-correlation coefficient | ||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 9GZP PDB chain-ID: A / Accession code: 9GZP / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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