Neurospora crassaの昼間の時計機能を調節するアンチセンセスのRNAの役割
Cas Kramer1, Jennifer J Loros, Jay C Dunlap
1School of Biological Sciences, University of Manchester, Manchester M13 9PT, UK.
Nature
|February 28, 2003
まとめ
アンチセンセスのRNAは,ニューロスポラ・クラサの昼夜時計を調節する. この研究は,真核細胞内の遺伝子発現と時間的プロセスを制御するアンチセンセスのRNAの新たな役割を明らかにしています.
科学分野:
- 分子生物学は分子生物学である.
- クロノバイオロジーはクロノバイオロジーを用います.
- 遺伝学 遺伝学とは
背景:
- ユカリオットのアンチセンセスのRNAの機能的意義はほとんど未知のまま,自然に発生するアンチセンセスのトランスクリプトはほとんど特徴づけられていない.
- 最近の発見は,以前認識されていたよりも,細胞プロセスにおけるアンチセンスRNAの役割がより広いことを示唆しています.
研究 の 目的:
- モデル生物であるニューロスペーラ・クラッサ (Neurospora crassa) の昼夜時計機構におけるアンチセンセスのRNAの役割を調査する.
- アンチセンセスのRNAが,光による昼夜時計の誘導とリセットに影響を与えるかどうかを判断する.
主な方法:
- 異なる照明条件下での野生型および変異性ニューロスポラ・クラサ菌株における反感覚周波数 (frq) トランスクリプトレベルの分析.
- 変異したアンチセンセスのFRQRNA誘導によるワイルド型と変異株の間の昼夜時計のタイミングと光誘発のリセットの比較.
主要な成果:
- アンチセンセスの frq トランスクリプトは,暗闇で frq トランスクリプトを感知するためにアンチフェーズでサイクリングを示し,ワイルド型株では光によって誘導されます.
- 光誘発アンチセンセスを欠く変異株frq RNAは,昼夜時計のタイミングが遅れており,光誘発リセットが変化しています.
- これらの発見は,時計コンポーネントロカスから派生したアンチセンセスのRNAが,昼間の時計の誘導に役割を果たしていることを示しています.
結論:
- この研究は,アンチセンセスのRNAと昼間のタイミングとの間に予期せぬつながりを確立しています.
- 自然に発生する反感覚RNAによって調節される真核細胞プロセスの新しい例を提供し,その機能的重要性を強調しています.
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