核孔複合体の変化によって制御される細胞周期調節輸送

Taras Makhnevych¹, C Patrick Lusk, Andrea M Anderson

¹Department of Cell Biology, University of Alberta, Edmonton, Alberta, Canada T6G 2H7.

Cell

|December 31, 2003

まとめ

ミトーシス中の核孔複合体 (NPC) の再編成は,核輸送を調節する. 特定のタンパク質 (Nup53p) は,カリオフェリンKap121pを阻害し,酵母における細胞サイクル進行を制御する.

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.
遺伝学遺伝学とは

背景:

ユカリオット細胞は,細胞サイクル制御のための核輸送を調節する.
核輸送メカニズムは,核包膜が無傷である場合でも,ミトーシス中に機能する必要があります.
核孔複合体 (NPC) は,核と細胞質の間の分子移動を調節する中心的な役割を果たします.

研究の目的:

ミトーシス中の輸送調節のメカニズムを明らかにする.
NPCにおけるM段階の特定の変化の役割を調査する.
核輸送が細胞サイクル進行にどのように影響するかを理解する.

主な方法:

ミトーシス中のNPCダイナミクスを観察するために酵母細胞を研究しました.
Nup53pとKap121pの相互作用を調査しました.
Kap121pまたは抑制経路に欠陥がある酵母菌株を分析した.

主要な成果:

NPCにおける特定されたM相特有の分子再編成.
Nup53pがミトーシス中にKap121pと結合し,その輸送を阻害することを実証しました.
Kap121pまたはNup53p媒介経路に欠陥がある酵母菌株における観察されたミトーシス遅延.

結論:

NPC媒介によるKap121p輸送の調節は,ミトーシスに不可欠です.
この経路は,細胞サイクル進行に不可欠なタンパク質の分布を制御します.
この発見は,制御された核輸送による細胞サイクル制御のための新しいメカニズムを明らかにしています.

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