代謝酵素のアセチル化により,炭素源の利用と代謝流の調整が行われます
Qijun Wang1, Yakun Zhang, Chen Yang
1State Key Laboratory of Genetic Engineering, Department of Microbiology, School of Life Sciences and Institute of Biomedical Sciences, Fudan University, Shanghai 200032, China.
まとめ
ユカリオットの重要な調節体であるライシンアセチル化は,サルモネラ菌の中央代謝を広範に制御することが示されています. この可逆的な改変は,環境の変化に対応して,酵素活性,代謝流量,細胞成長に影響を及ぼします.
科学分野:
- 微生物学 微生物学とは
- バイオケミストリー バイオケミストリー
- メタボリック・レギュレーション
背景:
- リスインアセチル化は,真核細胞の細胞プロセスを調節する重要な翻訳後の改変である.
- プロカリオット代謝におけるその役割は,ほとんど未知のまま,知識のギャップを示しています.
研究 の 目的:
- プロカリオットの中央代謝におけるライシンアセチル化の機能と範囲を調査する.
- サルモネラ菌の代謝経路に対するアセチル化の規制的影響を明らかにする.
主な方法:
- サルモネラ菌におけるアセチル化酵素を特定するためのプロテオミック分析.
- 酵素活性測定は,アセチル化が代謝酵素に与える影響を評価するためのものです.
- 異なる炭素源条件下での代謝流量分析.
主要な成果:
- サルモネラ菌における中央代謝酵素の広範で微分なアセチル化が観察されました.
- アセチル化レベルは,異なる炭素源によって変化し,細胞成長と代謝フルスの変化と相関していた.
- グリコロシス/グルコネオゲネシスとシトラートサイクル/グリオキシラートバイパスを制御する主要な酵素は,アセチル化によって調節された.
- 成長状態と調整されたライシンアセチルトランスフェラーゼ-デアセチラーゼのペアは,主要な調節因子として特定されました.
結論:
- リバーシブルライシンアセチル化は,プロカリオットの環境変化を感知し,適応するための迅速なメカニズムを提供します.
- 酵素のアセチル化を含むこの代謝調節機構は,細菌や哺乳類にわたって保存されています.
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