電子トモグラフィでデスマソーマの結び目を解き放つ.
Wanzhong He1, Pamela Cowin, David L Stokes
1Skirball Institute of Biomolecular Medicine, New York University School of Medicine, 540 First Avenue, New York, NY 10016, USA..
まとめ
細胞粘着には,アデレンの接点とデスマソームのカデリン分子が含まれます. この研究では,カデリンチップの相互作用を視覚化して,細胞の結合と伝達のための柔軟なメカニズムを明らかにしました.
科学分野:
- 細胞生物学 細胞生物学
- 構造生物学 構造生物学とは
- バイオフィジックス 生物物理学
背景:
- 細胞の結合は,アデレンス・ジャンクションやデスマソームのような細胞の結合によって媒介され,組織の整合性にとって極めて重要です.
- カデリン相互作用は,細胞粘着の特異性およびメカニズムの中心的ですが,それらの正確な分子インターフェースは議論の余地があります.
研究 の 目的:
- デスマソーム内のカデリン分子の in situ 組織を視覚化するために.
- カデリン媒介細胞粘着の特異性とダイナミクスの基礎にある分子機構を解明する.
主な方法:
- プラスチックに埋め込まれた新生児マウスの皮膚部分の電子トモグラフィーを利用しました.
- デスマソーム構造の高解像度3次元マップを生成しました.
- 統合されたC-カデリン結晶構造データとトモグラフィの地図.
主要な成果:
- デスマソーム内の離散的なクラスターに編成された個々のカデリン分子を明らかにした.
- その先端で発生するカデリン相互作用が実証されています.
- アミノ-ターミナルトリプトファン交換を含む柔軟な分子間接界面を特定しました.
結論:
- 柔軟な尖端の相互作用によって媒介されるカデリンシスとトランス相互作用のための新しいメカニズムを提案しました.
- 細胞の接点に沿って粘着力の拡散におけるこの柔軟性の役割を強調した.
- デスマソーム機能の分子基礎に関する新しい構造的洞察を提供した.
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