MDCK細胞からのアピカル・ベソラテラル・エンドサイト・ベシクル間の微小管およびモーター依存融合をインビトロで行う
M Bomsel1, R Parton, S A Kuznetsov
1European Molecular Biology Laboratory, Heidelberg, Federal Republic of Germany.
Cell
|August 24, 1990
まとめ
細胞内分泌の経路は,末期のエンドソームで結合する. in vitroで再構成されたこのプロセスは,小胞融合のためにマイクロチューブルとキネシンやダイネインのようなモータータンパク質を必要とします.
科学分野:
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
- エピテル細胞生物学 エピテル細胞生物学
背景:
- 皮質細胞は,異なるアピカルとベースラテラルエンドサイトーシス経路を利用します.
- これらの経路は,細胞内の末端エンドソームに収束することが知られている.
- この収束を理解することは,細胞の取引と機能にとって極めて重要です.
研究 の 目的:
- 末期エンドソームとアピカルおよびベースラテラル内細胞小胞の in vitro 融合を復元し,分析する.
- 細胞のないシステムにおける内細胞経路の収束のための分子要件を特定する.
- この過程における微小管および関連するタンパク質の役割を調査する.
主な方法:
- 後期エンドソームとの膀融合を測定するための細胞フリーアッセイの開発.
- マディン・ダービー犬腎臓 (MDCK) 細胞を用いて,上皮内分細胞を研究する.
- 微小管に依存するタンパク質の必要性の生化学的分析.
主要な成果:
- 末期エンドソームによる内細胞胞融合の in vitro 再構成は成功しました.
- ポリマー化されたマイクロチューブルは,この in vitro 融合プロセスに不可欠であることが判明しました.
- キネシンやサイトプラズミックダイネインを含むマイクロチューブル結合タンパク質は,重要な成分として特定されました.
結論:
- 頂点と底辺のエンドサイトーシス経路の収束は,微小管に依存するメカニズムに依存しています.
- 機械化学モーターであるキネシンとダイネインは,末期エンドソームの膀融合を媒介する重要な役割を果たします.
- この細胞のないシステムは,内細胞経路収束の分子機構を解剖するための貴重なツールを提供します.
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