CRBNによるタリドミド類の標的となるヒトC2H2亜鉛指の分解を定義する
Quinlan L Sievers1,2, Georg Petzold3, Richard D Bunker3
1Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA.
まとめ
タリドミド類はCys2- His2亜鉛指タンパク質を標的とし,CRL4CRBN E3ユビキチンリガゼによって分解される. この研究は新しい亜鉛指デグロンを特定し,以前は薬効性がないと考えられていた治療標的を拡大しました.
科学分野:
- 生物化学
- 分子生物学
- 薬物の発見
背景:
- タリドミド,レナリドミド,ポマリドミドは,Ikaros (IKZF1) とAiolos (IKZF3) の転写因子の分解を誘導する.
- この分解は,薬物-CRBN複合体に結合するCys2-His2 (C2H2) 亜鉛指ドメインを認識するCRL4CRBN E3ユビキチンリガゼによって媒介されます.
研究 の 目的:
- ヒトのC2H2亜鉛指プロテオームを,タリドミド類に敏感な新型デグロンに対してスクリーニングする.
- 薬物-CRBN複合体とのC2H2亜鉛指の相互作用の構造的および機能的基礎を特徴づける.
- 以前は薬剤で治療できなかった転写因子の標的分解の可能性を調査する.
主な方法:
- タリドミド類を用いたヒトC2H2亜鉛指タンパク質のスクリーニング
- 特定された亜鉛指の構造と機能の特徴.
- 計算式亜鉛指ドッキングと生化学分析
- 選択的なタンパク質分解のための化合物の改変
主要な成果:
- 11つの新しいC2H2亜鉛指の検出
- 薬物-CRBNインターフェイスへの亜鉛指ドメインの様々な結合モードの実証.
- 薬-CRBN複合体を結合する150以上の潜在的なC2H2亜鉛指の予測 in vitro.
- 化合物の改変による選択的亜鉛指の分解の成功.
結論:
- 多様なC2H2亜鉛指ドメインは,CRL4CRBN E3リガゼのタリドミド類似体によって分解される.
- このメカニズムは,以前は薬が効かないと考えられていた転写因子を標的とする戦略を提供します.
- この発見は,標的型タンパク質の分解を活用した新しい治療法の開発の基礎となる.
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