CBP/p300のダブルサイト阻害剤KIXは,Mybの選択的かつ効果的な調節剤である
Stephen T Joy1, Madeleine J Henley1,2, Samantha N De Salle1,2
1Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, United States.
Journal of the American Chemical Society
|September 7, 2021
まとめ
研究者はMybLL-tideを開発し,急性骨髄性白血病 (AML) および他の癌において重要なMyb- CBP/ p300 KIX相互作用を標的とした強力な二重サイト阻害剤を開発した.
科学分野:
- 生物化学
- 分子生物学
- 癌 研究
背景:
- CBP/ p300のKIXモチーフと転写活性化剤Mybの相互作用は,特定の急性骨髄性白血病 (AML) および他の癌に関与しています.
- CBP / p300 KIXドメインは,複数の結合部位,他のドメインとの構造的類似性,多数の結合パートナー,および構造的柔軟性により,小分子阻害剤にとって挑戦的な標的です.
研究 の 目的:
- Myb- CBP/ p300 KIXの相互作用を標的とした高度に特異的で強力な小分子阻害剤を開発する.
- AML細胞におけるMyb誘導遺伝子発現を阻害する開発された抑制剤の有効性を調査する.
主な方法:
- ピコモラ・デュアルサイト阻害剤,MybLL-tideの設計と合成
- MybLL-tideのCBP/p300 KIXドメインおよび他のコアクティベータードメインに対する親和性および選択性プロファイリング.
- MybLL-tideがAML細胞におけるMyb·KIX依存遺伝子発現を抑制する能力の評価
主要な成果:
- MybLL-tideは,CBP/p300 KIXドメインに対するピコモラー親和性を示し,以前報告された化合物よりも著しく高かった.
- CBP/ p300 KIXドメインは他のコアクティベータードメインよりも5600倍優れている.
- MybLL-tideは,細胞内のMybとCBPとp300の結合を効果的に阻害し,AML細胞における主要なMyb·KIX依存遺伝子の抑制につながった.
結論:
- MybLL-tideは,CBP/p300 KIXドメインを選択的に標的にするための非常に有効で変更可能なツールです.
- この阻害剤は,AML細胞および異なったMyb活性を持つ他の癌の転写効果を評価するために使用できます.
- 双部位抑制戦略は,複数の結合表面を持つ他の挑戦的な共活性化ドメインをターゲットにすると有望です.
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