脊椎動物の細胞は,シリアとエクストラシリアのcAMPを分別的に解釈する
Melissa E Truong1, Sara Bilekova2, Semil P Choksi1
1Department of Biochemistry and Biophysics, Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA 94158, USA.
Cell
|May 1, 2021
まとめ
細胞はシリウムとサイトプラズマの信号を区別する. シリア循環型AMP (cAMP) は,特定のタンパク質キナーゼA (PKA) プール経由でヘッジホッグのシグナル伝達を阻害し,空間的なシグナル伝達特性を示します.
科学分野:
- 細胞生物学
- 分子信号
- 臓器の機能
背景:
- Gタンパク質結合受容体 (GPCRs) とヘッジホッグ経路の構成要素は,一次性乳毛に含まれています.
- 細胞信号伝達には 重要な役割を果たします
- GPCRシグナリングは,主シリウム内外の両方で発生します.
研究 の 目的:
- 細胞がGタンパク質結合受容体 (GPCRs) のシリウム内と外部からの信号を区別するかどうかを判断する.
- シリアとエクストラシリアのサイクルAMP (cAMP) が異なる情報を伝達するかどうかを調べる.
- 細胞がサブセルラー信号伝達イベントを区別するために使用するメカニズムを特定する.
主な方法:
- 特定のサブセルラー部位で周期的なAMP (cAMP) の生成を制御するための設計された光遺伝的および化学遺伝的ツール.
- ゼブラフィッシュと哺乳類の細胞モデルで同じ量のシリアとサイトプラズマのcAMPを生成した.
- 異なる細胞幾何学がエフェクタアクティベーションに与える影響を理解するためにモデリングを活用した.
- タンパク質キナーゼA (PKA) のシリアとエクストラシリアのプールが特定され,機能的に試験された.
主要な成果:
- シリアのcAMPは サイトプラズマのcAMPは 信号伝達を阻害した
- シリウムと細胞体の異なる細胞幾何学は,局所的なエフェクターを差異的に活性化することを示唆した.
- シリウム内に特定のタンパク質キナーゼA (PKA) が確認された.
- 皮PKAを遮断し,皮PKAを遮断せず,ヘッジホッグのシグナリングを活性化し,皮cAMPの効果を逆転させた.
結論:
- 細胞は,シリアーとエクストラシリアーサイクルAMP (cAMP) 信号を区別する.
- 機能的にも空間的にも異なるタンパク質キナーゼA (PKA) が,この細胞差別を媒介する.
- 独特の情報を伝達し,ヘッジホッグのような下流の信号伝達経路に影響します
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