哺乳類の胚のヘッジホッグ媒介によるパターニングには,送信された物質のトランスポーターのような機能が必要です
Yong Ma1, Alfrun Erkner, Ruoyu Gong
1Howard Hughes Medical Institute, Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
Cell
|October 10, 2002
まとめ
マウスのDispAタンパク質は,フルーツハエのシグナリングを助けます. マウスのDispAは,胚の発達とヘッジホッグタンパク質の放出に不可欠であり,種間の機能が保存されていることを示唆しています.
科学分野:
- 発達生物学 発達生物学とは
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- 配送 (disp) 遺伝子は,ドロソフィラの長距離ヘッジホッグ (Hh) 信号伝達を調節する.
- ヘッジホッグのシグナル伝達経路は,胚の発達とパターン形成に不可欠です.
研究 の 目的:
- 哺乳類のヘッジホッグシグナル伝達におけるドロソフィラディスプの遺伝子のネズミ同類の機能を調査する.
- マウスの初期の胚発達とソニック・ヘッジホッグ (Shh) 信号伝達におけるmDispAの役割を明らかにする.
- エッジホッグタンパク質の放出におけるDispタンパク質の生化学的活性を特徴づけるために.
主な方法:
- マウリンホモログを用いたドロソフィラの機能的救助実験.
- 初期のマウス胚におけるHhパターニング活動の分析.
- Shh放出におけるDispタンパク質の活性を測定するための生化学的測定法.
主要な成果:
- ミューリンのmDispAは,ドロソフィラディスパ遺伝子の機能を救出する.
- mDispAは,初期のマウスの胚におけるすべての調査されたHhパターニング活動に不可欠です.
- mDispAが欠けている線維芽細胞は,他の細胞のShh刺激が損なわれていることを示している.
- バイオケミカルアッセイでは,溶解性Hhタンパク質を放出するDispタンパク質の役割が示されました.
結論:
- ミュリンのmDispAは,ドロソフィラ・ディスプの機能的なホモログであり,哺乳類のヘッジホッグの信号伝達に不可欠です.
- ディスップタンパク質は,バクテリアトランスポーターとパッチで保存されたメカニズムを通じてヘッジホッグタンパク質の放出を促進する可能性があります.
- Disp機能の理解は,発達シグナル伝達の保存されたメカニズムについての洞察を提供します.
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