グルココルチコイド受容体のDNA結合は,生存に不可欠ではない
H M Reichardt1, K H Kaestner, J Tuckermann
1Division of Molecular Biology of the Cell I, German Cancer Research Center, Heidelberg.
Cell
|May 30, 1998
まとめ
グルココルチコイド受容体 (GR) は,遺伝子調節のためにDNA結合および非DNA結合メカニズムを使用します. GRの特定の変異 (A458T) は,生存のためのDNA結合独立機能の重要なインビボ重要性を明らかにしています.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- エンドクリノロジー エンドクリノロジー
背景:
- グルココルチコイド受容体 (GR) は,細胞機能と生存において重要な役割を果たします.
- GRは,DNA結合依存および独立経路を通じて遺伝子転写を調節する.
研究 の 目的:
- GRのDNA結合依存型とDNA結合依存型の転写活動のインビボの有意性を区別し,評価する.
- トランスクリプションの調節に対する障害のあるGR二分化の機能的影響を調査する.
主な方法:
- マウスにおけるCre/loxPシステムを用いてGR遺伝子の特定の点変異 (A458T) の生成.
- GRdim変異マウスの特徴は,GR機能を in vivo で分析する.
- GRdim変異体におけるGRE依存トランザクティベーションとAP-1駆動遺伝子トランスプレッセンスの評価.
主要な成果:
- A458T変異はGRの二分化を妨害し,GRE依存のトランザクティベーションを損なう.
- AP-1遺伝子のトランス抑制などのDNA結合独立機能は,GRdim変異体において機能し続けています.
- GRdimマウスは,GR-/-マウスとは異なり,生存可能であり,DNA結合独立のGR活動の重要な役割を強調しています.
結論:
- DNA結合独立のメカニズムは,グルココルチコイド受容体によって媒介される in vivo 機能と生存に不可欠です.
- この研究では,生物における異なるGR調節経路の関連性を成功裏に分離し,実証しました.
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