シルカディアン時計は,区切り振動変換によって調節されます
Yanrong Zhuang1, Zhiyuan Li2, Shiyue Xiong1
1State Key Laboratory of Membrane Biology, IDG/McGovern Institute for Brain Research, Tsinghua-Peking Joint Centre for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China.
Cell
|June 27, 2023
まとめ
哺乳類のATXN2とATXN2Lタンパク質はリズム変換の主調節体として機能し,脳内の振動コンデンサットを形成して昼夜リズムを制御します. 調整された行動により 日々の生物学的タイミングを 確実に保ち 適応に不可欠です
科学分野:
- 分子生物学
- クロノバイオロジー
- 細胞生物学
背景:
- サーカディアンリズムは地上の生命にとって根本的なものであり,生物学的過程において正確な昼間振動を必要とします.
- 細胞のトランスレーション環境におけるリズム的シフトは,日中時計のタイミングに不可欠ですが,規制メカニズムは未だに十分に理解されていません.
研究 の 目的:
- 哺乳類におけるリズム変換の主調節体を特定する.
- これらの調節体が昼夜リズムを制御するメカニズムを解明する.
主な方法:
- ネズミの上核におけるATXN2とATXN2Lの役割を研究した.
- 荒野型と相分離欠陥のATXN2を用いた枯渇と救出実験.
- サーカディアン周期,トランスレーション活性化サイクル,遺伝子発現に対する効果を分析した.
主要な成果:
- ATXN2とATXN2Lは,リズム変換の協力するマスターレギュレータとして特定されました.
- これらのタンパク質は,スプラキアズマ核で空間時間振動コンデンサートを形成します.
- ATXN2またはATXN2Lの枯渇は,昼夜周期の逆の変化を引き起こし,両方の欠乏はリズムを乱した.
- 段階分離欠陥ATXN2は,観察された細胞欠陥を修復できませんでした.
結論:
- 振動変換は,ATXN2とATXN2Lの空間時間凝縮によって調節される.
- これらのマスターレギュレータは哺乳類の正確な昼夜リズムを達成するために不可欠です.
- 生物学的タイミングを 制御する新しいメカニズムが 発見されました
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