KAT5 ティロシンリン酸化カップルは,ATM シグナル伝達に染色体センシングを感知します
Abderrahmane Kaidi1, Stephen P Jackson
1The Gurdon Institute and Department of Biochemistry, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK.
Nature
|May 28, 2013
まとめ
DNA損傷の検出には,KAT5 (TIP60とも呼ばれる) ティロシンリン酸化が関与し,H3K9me3.3.に結合することを強化します. この変異はATMキナーゼを活性化し,DNA損傷シグナル伝達と細胞生存を促進します.
科学分野:
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
- バイオケミストリー バイオケミストリー
背景:
- DNA損傷の検出は,細胞の反応にとって極めて重要です.
- 哺乳類におけるDNA損傷シグナル伝達とクロマチンの感知を結びつけるメカニズムは不明である.
研究 の 目的:
- DNA損傷シグナル伝達の規制メカニズムを解明する.
- 染色体感知とDNA損傷反応におけるKAT5リン酸化の役割を調査する.
主な方法:
- DNA損傷後のチロシンリン酸化を研究したKAT5 (TIP60としても知られている).
- H3K9me3ヒストンマーカーへのKAT5結合を評価した.
- 試験されたATMキナーゼのKAT5媒介アセチル化.
- KAT5のリン酸化を媒介するc-Ablの役割を研究した.
主要な成果:
- DNAの損傷はKAT5のチロシンリン酸化を増加させ,H3K9me3.3.への結合を強化します.
- リン酸化KAT5はATMキナーゼをアセチル化し,DNA損傷チェックポイントを活性化し,細胞生存を促進します.
- クロマチンの変化により,KAT5のチロシンリン酸化とATMシグナル伝達が強化される.
- プロトオンコゲンc-AblはKAT5チロシンリン酸化を媒介する.
結論:
- KAT5のチロシンリン酸化は,ゲノムとクロマチンの混乱を感知する上で重要なイベントです.
- c-Ablは,KAT5改変によるDNA損傷応答シグナル伝達において重要な役割を果たします.
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