结合tRNAGly基因冗余与葡萄球菌细胞壁完整性,抗生素易感性和潜在的毒性
Adamantia Kouvela1, Jose R Jaramillo Ponce2, Nikoleta Giarimoglou1
1Department of Biochemistry, School of Medicine, University of Patras, 26504 Patras, Greece.
Nucleic acids research
|July 13, 2025
概括
转移RNA (tRNA) 基因冗余在金黄色葡萄球菌中补偿了基因损失,影响细胞壁完整性和抗生素敏感性. 这突出了tRNA.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 转移RNA (tRNA) 基因冗余性在物种之间被了解得很少.
- 黄金葡萄球菌拥有多个tRNAGly基因,对蛋白质合成和细胞壁形成至关重要.
- 这些基因是由一个与甘氨酸-tRNA合成酶 (GlyRS) 相互作用的glyS T-box рибо开关调节的.
研究的目的:
- 为了研究切除特定tRNAGly基因拷贝 (P1 tRNAGlyGCC) 在黄金葡萄球菌中的功能影响.
- 探索减少tRNA基因冗余的补偿机制和生理后果.
- 了解tRNA基因冗余在细菌代谢平衡和致病性中的作用.
主要方法:
- 通过CRISPR/Cas9基因编辑来切除P1tRNAGlyGCC基因副本.
- 增长分析和转化活动测量.
- 转录组学,蛋白组学和功能分析 (细胞壁完整性,抗生素易感性,生物膜形成,入侵).
主要成果:
- 移除P1tRNAGlyGCC并没有影响整体生长或转化活性,这表明其他tRNAGly基因的功能补偿.
- 观察到依赖营养的应激反应,包括细胞壁完整性受损和对细胞壁向抗生素敏感性增加.
- 编辑的菌株显示生物膜形成减少,但保持其在体外侵入人类细胞的能力.
结论:
- tRNA基因冗余性在维护金黄色葡萄球菌生理学方面发挥着至关重要的作用.
- 在致病性细菌中,tRNAs 作为代谢平衡的调节者.
- 特定的tRNA基因切除可以导致细胞壁完整性和抗生素耐药性概况的改变.
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