多能性の確立におけるTET1とTET2のNANOG依存機能
Yael Costa1, Junjun Ding, Thorold W Theunissen
1Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK.
Nature
|February 12, 2013
まとめ
研究者らは,体細胞の再プログラミングの強化に不可欠なTET1とTET2を含む新しいNANOG関連タンパク質を発見しました. これらのタンパク質は,NANOGと物理的に相互作用し,触媒活動を通じて多能性の確立を促進します.
科学分野:
- 幹細胞生物学 幹細胞生物学とは
- エピジェネティクス エピジェネティクス
- 分子生物学は分子生物学である.
背景:
- NANOGは,多能性を維持し,体細胞を再プログラムするための重要な転写因子です.
- 再プログラミング中のNANOGのタンパク質の相互作用と機能は完全に理解されていません.
研究 の 目的:
- ソマティック細胞の再プログラムに関与する新しいNANOG相互作用タンパク質を特定する.
- 素朴な多能性の確立におけるこれらの相互作用の役割を明らかにする.
主な方法:
- マウスの胚性幹細胞におけるNANOGインタラクタを特定するために,強化された浄化技術と計算アルゴリズムを利用した.
- コイムノプレシピテーションを用いた物理的関連が確認され,再プログラム効率が評価されました.
- NANOG媒介による再プログラミングにおけるTETファミリータンパク質 (TET1,TET2) の役割を調査した.
主要な成果:
- TET1.1のような19の新しいインタラクターを含む27の高信頼性NANOGタンパク質パートナーを特定しました.
- NANOGがTET1とTET2と物理的に相互作用し,再プログラミングの効率を高めることを実証しました.
- TET1/TET2の触媒活性が,NANOGとのシネージ的再プログラミング効果に不可欠であることを示した.
- NANOGとTET1が重要な多能性遺伝子位置を共占し,TET1の結合はNANOGに依存することを発見しました.
結論:
- TET1とTET2は,再プログラミングにおけるNANOGの新しい,機能的に重要な相互作用パートナーです.
- NANOGとTET1/TET2の間の物理的な相互作用は,TETの触媒的活動を通じて再プログラミングを容易にする.
- NANOGはTET1をターゲットとなる遺伝子に採用し,5-ヒドロキシメチルサイトシンを増やし,ナイブ・プルリポテンシーに対する発現を誘発する.
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