RAFのようなタンパク質キナーゼは,深く保存され,迅速なオクシン反応を媒介する
Andre Kuhn1, Mark Roosjen1, Sumanth Mutte1
1Laboratory of Biochemistry, Wageningen University, Stippeneng 4, Wageningen, the Netherlands.
Cell
|December 21, 2023
まとめ
迅速に加速した繊維サルコマ (RAF) のようなキナーゼを含む保存された古代のメカニズムは,陸上の植物と藻類の急速なオクシン反応を媒介する. このタンパク質の酸化経路は 初期の緑の系統の進化の鍵です
科学分野:
- 植物生物学
- 分子信号
- 進化生物学
背景:
- アクシンは成長と発達を調節する重要な植物ホルモンです.
- 核オクシン経路は陸上の植物で知られているが,藻類では存在しないことが,代替信号伝達メカニズムを示唆している.
- 急速なオクシン反応は文書化されているが,植物系での保存は不明である.
研究 の 目的:
- 陸上の植物と藻類の間でオクシン誘発の急速なリン酸化の保存を調査する.
- これらの保存された迅速なオキシン反応の分子媒介者を特定する.
- 緑の系統における 急速なオキシンシグナル伝達の 進化的起源を理解するために
主な方法:
- アクシンで処理された植物と藻類の比較タンパク質解析
- 保存されたタンパク質のリン酸化標的の特定
- 迅速に加速した線維肉腫 (RAF) のようなキナーズの生化学的および遺伝的特徴.
- アクシンに対する細胞の迅速な反応を測定する生理学的測定法.
主要な成果:
- アクシンに対する保存された,プロテオーム全体のリン酸化反応は,陸上の植物と藻類の5種で確認された.
- アクシンに対する急速な生理学的反応は同じ種で維持された.
- 迅速に加速した繊維サルコマ (RAF) 型のタンパク質キナーゼは,オクシン誘発のリン酸化の中心的媒介体として特定されました.
- 遺伝子解析は,RAFのようなキナーゼをオキシンリン酸化と急速な細胞反応の両方に関連付けました.
結論:
- RAFのようなキナーゼによって媒介される急速なオキシンシグナル伝達のための古代のメカニズムが緑の系統に保存されています.
- この保存された経路は 陸上の植物と藻類の多様化より前のものです
- この発見は 初期の植物ホルモンシグナル進化の 根本的な側面を明らかにしています
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