トランスクリプションにおける延長終止決定

P H von Hippel¹, T D Yager

¹Institute of Molecular Biology, University of Oregon, Eugene.

Science (New York, N.Y.)

|February 14, 1992

まとめ

RNAポリメラーゼは,トランスクリプトを拡張するか,終了するか,どちらかを選択しなければなりません. 移行状態のエネルギーバリアの小さな変化は,終結効率を制御し,遺伝子調節に影響を与えます.

科学分野:

分子生物学は分子生物学である.
バイオフィジックス生物物理学
バイオケミストリーバイオケミストリー

背景:

転写には,RNAの延長と終結の間の運動的な競争が伴う.
終結効率は遺伝子調節に不可欠であり,RNAポリメラーゼ複合体の安定性に影響されます.

研究の目的:

RNAの延長と終結経路の間の運動競争を説明するために.
本質的な終結部位における伸縮複合体の不安定化をモデリングする.
規制タンパク質による終端効率調節のメカニズムを記述する.

主な方法:

異なったEyring移行状態の障壁の分析.
端末部位における伸縮複合体不安定化のモデリング.
結末に対する規制タンパク質の効果の説明.

主要な成果:

終止効率は,相対的な移行状態のエネルギー障壁の小さな変化と相関しています.
一つのモデルは,内在の端末の延長複合体の不安定化を説明する.
調節タンパク質による終端変調のメカニズムが解明される.

結論:

終結は,移行状態のエネルギー障壁によって制御される制御された運動プロセスです.
これらの障壁を理解することで,遺伝子調節に関する洞察が得られます.
調節タンパク質は,転写終結を調節する上で重要な役割を果たします.

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