プロゲステロン受容体媒介による転写の調節は,リン酸化による
L A Denner1, N L Weigel, B L Maxwell
1Department of Cell Biology, Baylor College of Medicine, Houston, TX 77030.
まとめ
プロゲステロン受容体 (PR) のリン酸化は,遺伝子転写の調節に不可欠です. プロテインキナーゼA (PKA) を活性化したり,フォスファタゼを阻害したりすると,プロゲステロンを模倣する.
科学分野:
- 分子生物学は分子生物学である.
- エンドクリノロジー エンドクリノロジー
- 遺伝子規制 遺伝子規制
背景:
- プロゲステロン受容体 (PR) は,鶏卵子における遺伝子転写を調節するフォスフォタンパク質である.
- 生体内でのプロゲステロン治療は,PRのリン酸化を刺激し,ホルモンの作用における役割を示唆しています.
研究 の 目的:
- プロゲステロン受容体媒介による転写の調節におけるリン酸化の役割を調査する.
- タンパク質キナーゼA (PKA) とタンパク質ファスファタゼが,この調節に関与しているかどうかを判断する.
主な方法:
- トランジエンント・トランスフェクション・アッセイは,PR媒介トランスクリプションを研究するために使用されました.
- 8-ブロモサイクルアデノシンモノフォスファート (8-Br cAMP) とオカダイ酸が転写に及ぼす効果を調べました.
主要な成果:
- PKAアクティベーターである8-Br cAMPは,転写に対するプロゲステロンの効果を模倣した.
- PKA阻害はホルモンの作用を阻害した.
- フォスファターゼ阻害剤であるオカダイ酸は,プロゲステロンと同様に転写を刺激します.
結論:
- PRまたは関連するタンパク質のリン酸化は,PR媒介による転写を調節する.
- PKAとタンパク質フォスファタゼは,PRの転写活性を調節する上で重要な役割を果たします.
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