タンパク質対タンパク質相互作用安定剤の発見のための部位指向の断片ベースのスクリーニング
Eline Sijbesma1, Kenneth K Hallenbeck2, Seppe Leysen1
1Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems (ICMS) , Eindhoven University of Technology , 5600 MB Eindhoven , The Netherlands.
Journal of the American Chemical Society
|February 2, 2019
まとめ
研究者達は,タンパク質とタンパク質の相互作用 (PPI) を安定させる小さな分子を発見するために,新しい結合方法を開発しました. この技術は乳がんにおいて重要な14-3-3σとエストロゲン受容体αの相互作用の安定剤を成功裏に特定した.
科学分野:
- 薬の発見と開発
- 分子生物学
- 構造生物学
背景:
- タンパク質とタンパク質の相互作用 (PPI) を小分子で調節することは,薬剤発見の重要な戦略です.
- PPIの安定化は,特定のタンパク質のインターフェースをターゲットにすることで,選択性の向上を含む,抑制よりも利点があります.
研究 の 目的:
- 14-3-3σとエストロゲン受容体α (ERα) の相互作用を安定させる断片を識別するために,二硫化物捕獲 (テザリング) スクリーニング技術を適用する.
- ERαの14-3-3σ調節を標的とした乳がんの治療戦略としてPPI安定化を検討する.
主な方法:
- 断片のスクリーニングのためにサイト指向の二硫化物捕獲 (テザリング) 測定法を使用した.
- 14-3-3σとERα由来ペプチドのリン酸化依存相互作用に焦点を当てた.
- X線結晶学を用いた安定化メカニズムを決定した.
主要な成果:
- 14-3-3σ/ERαの親和性を最大40倍まで増強するオーステリック安定剤を特定した.
- 構造分析で安定化メカニズムを解明した.
- 他の14-3-3クライアントに対して,ERα型モチーフに対する特定された断片の部分的選択性が実証された.
結論:
- 結合アプローチは,PPI安定剤の発見に有効です.
- この研究は,乳がんなどの疾患における PPIを標的とした新しい治療法の開発のための基盤を提供します.
- PPIの安定化は 薬剤発見の有望な,しかし未熟な道を示しています
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