トポロジカルドメインの間のスイッチが,マウスの肢体におけるホックスD遺伝子のコリネアリティの基礎となっている
Guillaume Andrey1, Thomas Montavon, Bénédicte Mascrez
1School of Life Sciences, Federal Institute of Technology, Lausanne, 1015 Lausanne, Switzerland.
まとめ
マウスの四肢におけるホックスド遺伝子の調節は,発達中に2つのドメインの間でシフトする. このスイッチは,手首と指の構造の形成に不可欠であり,脊椎動物の付属体におけるコリネア遺伝子の組織を説明します.
科学分野:
- 発達生物学 発達生物学とは
- 遺伝学 遺伝学とは
- 進化生物学の進化生物学について
背景:
- ホックス遺伝子は,幹と付属軸に沿った動物の体プランを確立するために不可欠です.
- マウスの足の発達中に,Hoxd遺伝子は,早期 (腕/前腕の仕様) と後期 (数字形成) の2つの異なる転写波を発現します.
研究 の 目的:
- 手足の発達中の早期および遅期のHoxd遺伝子発現の間の移行の基礎となる規制メカニズムを調査する.
- トポロジカルドメインのスイッチングがホックス遺伝子調節と肢体のパターニングにどのように影響するか理解する.
主な方法:
- マウスの四肢発達中のHoxd遺伝子転写パターンの分析.
- ホックス遺伝子クラスター内のトポロジカルドメインの相互作用の検討.
主要な成果:
- 反対のトポロジカルドメインの間の機能的なスイッチは,四肢の発達中に発生します.
- 中央ホックスド遺伝子のテロメアからセントロメア領域の相互作用への移行.
- このスイッチは,手首の形成を促進し,コリネア遺伝子の調節を説明します.
結論:
- トポロジカルドメインの間の規制の切り替えは,四肢のモジュラリティと進化の分岐を強調しています.
- このメカニズムは,脊椎動物の付属体のホックス遺伝子発現の正確な空間的および時間的な制御を説明します.
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