胚細胞結合の調節は,カデリンの細胞質領域によって行われます
1Molecular Neurobiology Laboratory, Salk Institute for Biological Studies, San Diego, California 92186.
Cell
|April 17, 1992
まとめ
カデリンは,キャテニンとの細胞プラズマ相互作用を通じて胚細胞の粘着を調節する. 細胞外領域が欠けている変異性N-カデリンは,細胞結合を阻害し,重要な調節領域を明らかにした.
科学分野:
- 発達生物学 発達生物学について
- 細胞粘着性 細胞粘着性について
- 分子生物学は分子生物学である.
背景:
- 細胞の差分結合は,胚の発達に不可欠である.
- カデリンは,細胞内カテニンと相互作用する重要な細胞粘着分子です.
- カデリンの機能における細胞質相互作用の正確な役割は,まだ完全に解明されていない.
研究 の 目的:
- 胚の発達中の細胞粘着を調節するN-カデリン・サイトプラズマドメインの役割を調査する.
- N-カデリン・サイトプラズマドメインの特定の領域が細胞結合を阻害できるかどうかを判断する.
- 切断されたN-カデリン変異体が他のカデリンと結合するカテニンに与える影響を調べる.
主な方法:
- 細胞外ドメインが欠けているXenopus N-cadherin変異体の生成.
- 変異したN-カデリンのXenopus胚における発現.
- 胚細胞の粘着とカテニンの結合に対する結果の効果の分析.
主要な成果:
- N-カデリン変異体の発現は,胚の細胞結合を著しく抑制した.
- N-カデリン・サイトプラズマドメイン内の少なくとも2つの異なる領域は,粘着を阻害するものとして特定されました.
- 変異したカデリンは,カテニンがE-カデリンの結合に干渉することが示されました.
結論:
- カデリン媒介細胞結合は,カデリン細胞質領域と細胞内カテニンの相互作用によって調節される.
- これらの細胞プラズマの相互作用は,カデリン機能を調節し,形態発生に潜在的に役割を果たす可能性があります.
- この発見は,組織発達の過程で細胞粘着を調節するメカニズム,特に複数のカデリン型が共表現されている場合に顕著である.
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