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プロモーターアンチセンスRNAの形は,リガンド誘発の転写活性化を調節する
Fan Yang1, Bogdan Tanasa2, Rudi Micheletti3
1Howard Hughes Medical Institute, Department and School of Medicine, University of California, San Diego, La Jolla, CA, USA. fay009@health.ucsd.edu.
Nature
|July 1, 2021
まとめ
長い非コーディングRNA (lncRNAs),特にプロモーター反意味RNA (PAS) は,P-TEFb複合体を制御することによって遺伝子転写を調節する. PASRNAはデメチラゼを誘導し,構造的な相互作用によって遺伝子の活性化につながります.
科学分野:
- ゲノミクス
- 分子生物学
- RNA 生物学
背景:
- 長い非コーディングRNA (lncRNAs) は哺乳類のゲノム調節において重要な役割を果たします.
- プロモーターアンチセンス (PAS) RNAは,議論の余地のある特定のlncRNAのクラスである.
- RNAの全ゲノム分布と機能を理解することは不可欠です.
研究 の 目的:
- ゲノム内のRNA分布を定量的に検出するための新しい測定法を開発する.
- 転写調節におけるPASRNAの役割を明らかにする.
- PASRNAが遺伝子発現を制御するメカニズムの発見
主な方法:
- RNA-Cas13a複合体 (CIRC) アッセイによるクロマチン分離の開発.
- ゲノム全体のRNA分布を定量的に検出する.
- H3K9me3,HP1α,およびKAP1の遺伝子プロモーターの募集と放出の分析.
主要な成果:
- PASRNAは7SK小核RNA-P-TEFb複合体を無効化することによって,転写停止放出のためのゲートキーパーとして機能する.
- リガンド活性化されたERαはPASRNAを誘導し,H3K9me3の喪失とターゲットプロモーターからHP1αとKAP1の放出を引き起こします.
- 遺伝子活性化には,RNA幹ループ構造によって媒介されるH3K9me3デメチラゼのPASRNA依存的募集が不可欠である.
結論:
- PASRNAは構造特性を通して,遺伝子転写を調節するためにデメチラゼを勧誘する.
- リン酸化KAP1を含むERα- メガトランス増強剤経路は,17β- エストラディオール誘発遺伝子活性化を促進する.
- この研究は,PAS RNA媒介の遺伝子調節のためのRNA構造に基づくメカニズムを明らかにしています.
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