mRNA輸出因子Gle1とイノシトールヘキサキスホスファートは,異なった翻訳段階を調節する

Timothy A Bolger¹, Andrew W Folkmann, Elizabeth J Tran

¹Department of Cell and Developmental Biology, Vanderbilt University Medical Center, U-3209 MRBIII, 465 21st Avenue South, Nashville, TN 37232-8240, USA.

Cell

|August 30, 2008

まとめ

Gle1とイノシトールヘキサキスファート (IP(6) は,酵母における効率的な翻訳終止と開始に不可欠です. Gle1はmRNAの輸出と翻訳を独自に調整し,病理生理学のモデルに影響を与えます.

科学分野:

分子生物学は分子生物学である.
細胞生物学細胞生物学
遺伝学遺伝学とは

背景:

遺伝子発現は,メッセンジャーRNA (mRNA) の輸出と翻訳に依存しています.
これらのプロセスの間の正確な機能的なつながりは,まだ完全に理解されていません.
Gle1は重要なmRNAエクスポート因子であり,その機能はイノシトールヘキサキスホスファート (IP(6) に依存しています.

研究の目的:

翻訳の終了と開始におけるGle1とIPの役割を調査する.
mRNAエクスポートとトランスレーションの連携メカニズムを解明する.
病理生理学におけるGle1機能の影響を理解する.

主な方法:

Saccharomyces cerevisiaeをモデル生物として利用した.
翻訳終結および開始因子とのGle1の相互作用を調査した.
分析されたゲル1変異体とIPが欠けている株は,翻訳の欠陥のために.
eIF3変異体との遺伝子相互作用に関する研究を行いました.

主要な成果:

Gle1とIP(6) は,効率的な翻訳終了に不可欠です.
Gle1は,終止因子と開始因子 (eIF3) とともに相互作用する.
Gle1変異体は,IPが欠けている株とは異なり,翻訳開始の欠陥を示しています.

結論:

Gle1,IP(6),Dbp5は,翻訳終了を規制するために協力している可能性が高い.
Gle1は独立して翻訳開始に寄与します.
Gle1はmRNAのエクスポートとトランスレーションの重要なコーディネーターとして機能し,疾患モデルに影響を及ぼします.

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