増強剤の放出と再ターゲティングは,病気の感受性遺伝子を活性化します
Soohwan Oh1, Jiaofang Shao2, Joydeep Mitra3
1Howard Hughes Medical Institute, Department and School of Medicine, University of California San Diego, La Jolla, CA, USA.
Nature
|May 27, 2021
まとめ
好みの遺伝子プロモーターが失われると 増強剤は標的を切り替え 新しいプロモーターを活性化します CTCF結合によって影響を受けるこの"増強剤の放出と再標的化"メカニズムは,疾患感受性遺伝子を活性化することができます.
科学分野:
- 遺伝子調節
- ゲノミクス
- 分子生物学
背景:
- エンハンサー・プロモーターの相互作用は,正確な遺伝子転写に不可欠です.
- 増強剤の標的選択を理解することは,健康と病気を理解するために不可欠です.
研究 の 目的:
- 増強器のターゲットのスイッチングのメカニズムの調査.
- 強化剤と促進剤の相互作用におけるCTCFとコヘシンの役割を探求する.
- 増強剤の放出と再ターゲティングが病気に及ぼす影響を特定する.
主な方法:
- 遺伝子消去と変異の分析
- CRISPRによる干渉のスクリーニング
- dCas9によるCTCFテザリング
- 癌変異とGTEx/GWASデータの分析
主要な成果:
- 好ましいプロモーターの機能的喪失は,代替プロモーターを活性化するために強化剤を放出する ("強化剤の放出と再ターゲティング").
- CTCFはプロモーターに結合し,コヒーゼンスに依存し,プロモーターの選択を決定する.
- 増強剤の放出と再ターゲティングは,パーキンソン病と癌における疾患感受性遺伝子の活性化に根ざしています.
結論:
- 強化剤の放出と再ターゲティングは遺伝子調節における重要なメカニズムである.
- プロモーター選択におけるCTCFの役割は,クロマチンの境界における役割とは異なる.
- このメカニズムは様々な病気の 遺伝的根拠についての洞察を与えてくれます
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