ラン輸送のシステム分析

Alicia E Smith¹, Boris M Slepchenko, James C Schaff

¹Center for Cell Signaling, Department of Pharmacology, University of Virginia, Charlottesville, VA 22908, USA.

Science (New York, N.Y.)

|January 19, 2002

まとめ

核サイトプラズマの輸送ダイナミクスは,in vivoで研究されました. NPCの流量容量ではなく,Ran交換因子RCC1は,Ran輸送を規制する鍵であり,堅牢なシステムを明らかにします.

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.
バイオフィジックス生物物理学

背景:

核サイトプラズマ輸送は,真核細胞の機能に不可欠である.
グアニンヌクレオチドトリフォスファタゼRANは,重要な規制的役割を果たしています.
輸送部品の相互依存のダイナミクスは,in vivo分析を複雑にする.

研究の目的:

完ぺきな真核細胞におけるラン輸送ダイナミクスを定量的に分析する.
核孔複合体 (NPC) 全体の安定状態ランフルースの主要な調節体を特定する.

主な方法:

組み合わせた実験的および計算モデリングアプローチ.
Ran輸送のインビボ研究.

主要な成果:

核と細胞プラズマの間のランフルースの最初の定量モデルを開発した.
Ran交換因子RCC1が,安定状態の流動の重要な調節因子であると予測した.
推定総量 in vivo ランフリュースはNPC毎秒あたり520分子.
核細胞プラズマ輸送システムの強さを実証した.

結論:

RCC1はNPCの流量容量ではなく,安定状態のRan流量の決定的決定因子です.
核細胞プラズマの輸送システムは堅牢で,定量的に特徴付けられています.

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