トランスクリプション・レプレッサーのネットワークがオキシン反応を調節する
Jekaterina Truskina1,2, Jingyi Han2, Elina Chrysanthou2
1Laboratoire Reproduction et Développement des Plantes, Université de Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRAE, Lyon, France.
Nature
|November 19, 2020
まとめ
植物ホルモンのオクシンは,AUXIN RESPONSE FACTOR (ARF) の転写因子を介して成長を調節する. この研究は,アラビドプシスのクラスAのARF遺伝子発現を抑制し,発達中のオキシンシグナルを調節することを明らかにしています.
科学分野:
- 植物生物学
- 分子遺伝学
- 発達生物学
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.
- アクシン反応因子 (ARF) の転写因子は,アクシンシグナル伝達を媒介する.
- クラスAのARFはオキシン反応性遺伝子を活性化しますが,その発現の調節は不明です.
研究 の 目的:
- アラビドプシス・タリアナのクラスAのARF遺伝子発現の調節を調査する.
- クラスAのARF遺伝子を制御する転写レギュレータを特定する.
- オーキシンシグナル伝達を 調節する仕組みを理解する
主な方法:
- クロマチンの変化とアクセシビリティの測定
- トランスクリプションのレギュレータを特定するための酵母単体スクリーニング
- 植物における一時的変異と変異表現の分析
主要な成果:
- クラスAのARFロシは,構成的に転写に開放されている.
- 各クラスAARF遺伝子の特異的な転写レギュレータが特定されました.
- 識別されたレギュレータのほとんどは,クラスAのARF遺伝子転写の抑制剤として機能する.
結論:
- 転写抑制剤のネットワークは,クラスAのARF発現を調節する.
- オープンクロマチンは,ARFレベルを正確に制御できます.
- この規制メカニズムは 植物が成長する過程でオキシンのシグナル出力を調整します
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