通过CcrM进行DNA甲基化有助于Agrobacterium tumefaciens植物病原体中的基因组维护
Sandra Martin1, Florian Fournes1, Giovanna Ambrosini2,3
1Department of Fundamental Microbiology, Faculty of Biology and Medicine, University of Lausanne, Lausanne CH-1015, Switzerland.
Nucleic acids research
|September 4, 2024
概括
通过CcrM的DNA甲基化调节了Agrobacterium tumefaciens中的细菌基因组复制和细胞周期. 这种表观遗传控制影响了运动性和生物膜形成等关键过程,揭示了与基因组维护的新联系.
科学领域:
- 微生物学 微生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 细菌遗传学 细菌遗传学
背景情况:
- 细胞周期调节的DNA甲基转移酶CcrM在Alphaproteobacteria中至关重要.
- 它在具有复杂多中心基因组的细菌中的功能在很大程度上是未知的.
- Agrobacterium tumefaciens 具有一个双中心的染色体,具有两个复制起源.
研究的目的:
- 研究CcrM在具有二心基因组的Agrobacterium tumefaciens中的作用.
- 了解DNA甲基化如何影响基因组维护和细胞周期调节.
- 阐明CcrM,表观遗传调节和复制启动之间的联系.
主要方法:
- 在野生类型和CcrM枯竭细胞中对甲基组,转录组和表型的比较分析.
- 复制起源 (ori1和ori2) 的活细胞成像.
- 基因表达调节的基因分析涉及CcrM,GcrA和复制启动蛋白.
主要成果:
- 通过CcrM进行DNA甲基化会影响细菌的运动性,生物膜形成和活力.
- CcrM积极调节repABCCh2操作子 (在ori2进行复制启动/分区),并抑制 gcrA.
- 在ori2的复制时间对DNA甲基化水平敏感;GcrA促进RepCCh2的表达.
结论:
- 在Agrobacterium tumefaciens中,对CcrM依赖的DNA甲基化对于适当的基因组维护至关重要.
- 一个涉及CcrM,GcrA和DNA甲基化的新型调节循环控制了在ori2.2的复制启动.
- 这项研究揭示了表观遗传与Alphaproteobacterial病原体中的基因组稳定性之间的原始联系.
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