Mycによる選択的転写調節は,細胞成長制御とリンパ細胞形成において有効である
Arianna Sabò1,2, Theresia R Kress1,2, Mattia Pelizzola1
1Center for Genomic Science of IIT@SEMM, Fondazione Istituto Italiano di Tecnologia (IIT), Via Adamello 16, 20139 Milan, Italy.
Nature
|July 22, 2014
まとめ
重要な転写因子であるMycはRNAをグローバルに増幅しない. 代わりに,それは特定の遺伝子セットを調節し,細胞状態に影響を与え,間接的に全体的なRNA生産に影響を与えます.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 癌生物学 癌生物学について
背景:
- c-mycプロトオンコゲン産物Mycは,多数のゲノム部位を結合する転写因子である.
- 以前の研究では,Mycは活性プロモーターとエンハンスターを広く標的にし,一般的な転写増幅器として作用することを示唆していました.
研究 の 目的:
- Mycがグローバルな転写増幅器として作用するか,または離散的な遺伝子セットを調節するかどうかを調査する.
- RNAのバイオゲネシスに対するMycの直接的および間接的な効果を区別する.
主な方法:
- マウスおよび培養細胞における全ゲノムクロマチン免疫降水 (ChIP)
- B細胞リンパ変異および線維芽細胞におけるRNA発現プロファイリング.
- 活発に増殖している細胞と静止している細胞の比較.
主要な成果:
- プロモーター/エンハンサーの菌類の侵入とRNA増幅は,別々の現象である.
- Mycは,グローバルな増幅ではなく,特定の遺伝子サブセットの差異的発現を駆動します.
- RNAバイオゲネシスに対するMycの効果は,そのプロモーター/強化剤の相互作用から分離できます.
結論:
- Mycは,直接的なグローバルトランスクリプションアンプとして機能しません.
- Mycは離散的な遺伝子セットを調節し,細胞状態の変化につながり,間接的に世界的なRNA生産とターンオーバーに影響を与えます.
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