H3K9me2脱メチル化によって引き起こされるDNA酸化は,エストロゲン誘発遺伝子発現を駆動する
Bruno Perillo1, Maria Neve Ombra, Alessandra Bertoni
1Istituto di Scienze dell'Alimentazione, Consiglio Nazionale delle Ricerche (C.N.R.), 83100 Avellino, Italy. perillo@unina.it
まとめ
ヒストンの改変が遺伝子発現を誘導する. LSD1によって誘発されるエストロゲン受容体標的のH3ライシン9脱メチル化は,DNA修復経路を開始し,エストロゲン誘発転写を可能にします.
科学分野:
- 分子生物学は分子生物学である.
- エピジェネティクス エピジェネティクス
- 遺伝子規制 遺伝子規制
背景:
- 核体ヒストンのN端の尾は,転写に不可欠な修正を受けます.
- エストロゲン受容体の活動は,エストロゲン反応性遺伝子の調節と関連しています.
研究 の 目的:
- H3ヒストンのメチル化と脱メチル化が,エストロゲン反応性遺伝子発現にどのように影響するかを調査する.
- エストロゲン受容体が染色体修正を通して転写を指揮するメカニズムを解明する.
主な方法:
- H3ヒストンのメチル化および脱メチル化パターンの分析.
- エストロゲン受容体のクロマチンの曲折とRNAポリメラーゼIIのリクルートにおける役割を調査する.
- LSD1デメチラゼ活性化と過酸化水素生成の影響を評価する.
- 8-オキシグアニン-DNAグリコシラーゼ1とトポイソメラーゼIIβ.βの徴募を観察した.
主要な成果:
- エストロゲン受容体への結合は,RNAポリメラーゼIIの相互作用を促進するためにクロマチンの曲解を誘導する.
- 増強剤とプロモーター部位でのH3リジン9の受容体標的脱メチル化はLSD1.1.を活性化します.
- 局所的な脱メチル化は過酸化水素を生成し,DNAを改変し,修復酵素を誘発する.
- これらの改変は,転写のための必須クロマチンとDNAの構成変化を誘発する.
結論:
- エストロゲン誘発転写は,制御されたDNA損傷と修復を含む新しいメカニズムに依存しています.
- LSD1媒介による脱メチル化と,その後のDNA修復経路は,エストロゲン反応性遺伝子の活性化に極めて重要です.
関連する概念動画
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Acetylation
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Acetylation
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