SPENは,X不活性化のトランスクリプションと表遺伝子制御を統合する
François Dossin1, Inês Pinheiro2, Jan J Żylicz2,3
1European Molecular Biology Laboratory, Director's Unit, Heidelberg, Germany.
Nature
|February 7, 2020
まとめ
SPENタンパク質は,Xist RNAと結合し,静止装置を募集することによって,X染色体不活性化 (XCI) を開始するために不可欠です. そのSPOCドメインは,Xistと転写因子を統合して,遺伝子サイレッシングの鍵です.
科学分野:
- エピジェネティクス
- RNA生物学
- 哺乳類の発達
背景:
- 長い非コーディングRNA (lncRNA) XistはX染色体不活性化 (XCI) の中心にある.
- Xistが遺伝子静止を媒介するメカニズムは完全に理解されていません.
- SPEN (Splicing Regulator Protein ENsomtic) は,シスト結合タンパク質として特定されています.
研究 の 目的:
- XCIにおけるSPENのインビヴォの役割を調査する.
- XCIにおけるSPENの作用メカニズムを解明する.
- SPENの機能領域とタンパク質インタラクタを定義する.
主な方法:
- マウスにおけるイン・ビボ試験,移植前の胚と胚性幹細胞を含む.
- 遺伝子発現とクロマチンの占有率の分析
- タンパク質インタラクターと機能ドメインを特定するための生化学的測定
主要な成果:
- マウスの発達初期にXCIを誘発するために,SPENは不可欠です.
- SPENはXistのアップレギュレーションによってX染色体に誘導され,活性遺伝子レギュレータを標的とする.
- SPENのSPOCドメインは,遺伝子の静止に十分であり,重要な表遺伝子調節体と相互作用する.
結論:
- SPENはXCI開始の重要なオーケストラとしてin vivoで作用します.
- SPENはXistRNAを転写機構と表遺伝子変異剤と統合する.
- SPOCドメインは,SPEN媒介による遺伝子静止の重要な効果因子である.
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