リボスイッチ リボスイッチ リボスイッチを含むsRNAは,応答調節体の結合によって遺伝子発現を制御する
Sruti DebRoy1, Margo Gebbie2, Arati Ramesh3
1Department of Microbiology and Molecular Genetics, The University of Texas Health Science Center at Houston, TX 77030, USA.
まとめ
新しいリボスイッチメカニズムは,Enterococcus faecalis.のエタノラミン利用遺伝子を制御する. EutX RNAは,アデノシルコバラミン (AdoCbl) が存在しない場合,EutVレギュレータを隔離し,遺伝子発現に影響を与えます.
科学分野:
- 微生物学 微生物学とは
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- Enterococcus faecalisにおけるエタノアミン利用 (eut) ローカスには少なくとも19の遺伝子が含まれています.
- エウトロキュスの遺伝子発現は,主にアデノシルコバラミン (AdoCbl) 反応する単一のリボスイッチによって調節されます.
研究 の 目的:
- エウトロクスのAdoCbl依存調節のメカニズムを解明する.
- 転写後の遺伝子制御におけるEutX RNAとEutV調節体の役割を特徴づける.
主な方法:
- EutX RNAとEutVレギュレータの相互作用を調査しました.
- AdoCblがEutX-EutV結合およびその後の遺伝子発現に及ぼす影響を研究した.
- EutV.を隔離するEutXの役割を分析した.
主要な成果:
- AdoCbl結合リボスイッチは,トランス作用RNAであるEutX.の一部です.
- EutXは,AdoCblが存在しない場合,EutVのレギュレータを二重ヘアピン構造を通して隔離する.
- AdoCblの存在下では,EutVが放出され,eut遺伝子の転写読読を促進します.
結論:
- 新しい転写後の遺伝子調節メカニズムとして,タンパク質結合のリボスイッチ媒介制御を導入した.
- AdoCbl.への反応として,EutXとEutVが複数のeut遺伝子の発現を調整する方法を実証しました.
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