ユビキチン依存の翻訳調節によるセルフェイトの決定
Achim Werner1,2, Shintaro Iwasaki2, Colleen A McGourty2
1Howard Hughes Medical Institute, University of California, Berkeley, California 94720, USA.
Nature
|September 25, 2015
まとめ
Ubiquitin ligase CUL3 ((KBTBD8) は,トリッチャー・コリンズ症候群に関与するタンパク質を改変することによって,ニューラル・クライスト細胞の特異性を調節する. このプロセスは,ユビキチン依存の翻訳調節を通じて細胞運命を決定する.
科学分野:
- 細胞生物学
- 発達生物学
- 生物化学
背景:
- メタゾアの発達は,多能幹細胞を特定の細胞の運命に正確に分化することに依存しています.
- 染色体と転写の変化は既知の調節因子であるが,細胞運命を決定する他の現象はあまり理解されていない.
研究 の 目的:
- ニューラル・クライストの新規調節体を特定する.
- 細胞ファートの決定におけるユビキチンリガゼ CUL3 ((KBTBD8) の役割を明らかにする.
主な方法:
- 人間とXenopus tropicalisのモデルでCUL3 (((KBTBD8) の機能を調査した.
- NOLC1とTCOF1タンパク質の 普遍性を分析した.
- TCOF1-NOLC1複合体とトランスレーション再プログラムに対するユビキティレーションの影響を調べました.
主要な成果:
- CUL3 ((KBTBD8) はニューラル・クライストの特異化に不可欠であると特定された.
- CUL3 ((KBTBD8) は,トリッチャー・コリンズ症候群に関連した遺伝子であるNOLC1とTCOF1を単離する.
- TCOF1-NOLC1のユビキティレーションは,RNAポリメラーゼIをリボソーム改変酵素に接続するプラットフォームを作り,トランスレーションプログラムを変化させます.
結論:
- ユビキチン依存の翻訳調節は,細胞運命を決定する重要なメカニズムである.
- CUL3 ((KBTBD8) は,ニューラル・クライストの仕様でトランスレーション・ランドスケープを調節する上で重要な役割を果たします.
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