探索不同菌根菌种中循环二核酸信号的进化分歧
Sayantan Mitra1, Sandip Paul2, Kamakshi Sureka3
1Centre for Health Science and Technology, JIS Institute of Advanced Studies and Research Kolkata, JIS University, Kolkata, West Bengal, India.
Archives of microbiology
|January 6, 2026
概括
像c-di-AMP和c-di-GMP这样的循环二核酸 (CDN) 调节细菌的功能. 菌根菌对这些信号系统显示出不同的进化路径,c-di-AMP是必不可少的,c-di-GMP有助于适应.
科学领域:
- 微生物学 微生物学
- 进化生物学 进化生物学
- 基因组学就是基因组学.
背景情况:
- 循环二核酸 (CDN) 是重要的细菌第二信使,调节生命过程.
- 结核菌和新兴的非结核菌 (NTM) 使用这些途径.
- 了解CDN信号进化在线虫菌的进化提供了洞察到致病性.
研究的目的:
- 研究Mycobacteriaceae家族中的c-di-AMP和c-di-GMP信号通路的进化动态.
- 为了将CDN通路基因的存在和变异与菌根菌病原性和生活方式相关联.
主要方法:
- 在整个真菌细菌基因组中对CDN相关基因 (disA,pde,ataC,DGC,PDE) 的比较基因组分析.
- 遗传学和进化选择分析.
主要成果:
- c-di-AMP合成酶基因 (disA) 在大多数真菌细菌中保存,除了Mycolicibacter. 在病原体中,化酶 (pde) 优于ATAC.
- c-di-GMP途径显示了基因含量和域架构的显著变化,表明频繁的基因增益/损失事件.
- 进化分析显示,c-di-AMP信号受到强烈的净化选择,对核心功能至关重要,而c-di-GMP信号更可变,支持适应.
结论:
- 菌株在c-di-AMP和c-di-GMP信号传递方面表现出明显的进化分歧.
- c-di-AMP是核心菌根体生理学的保存,必不可少的调节者.
- c-di-GMP 提供适应性灵活性,用于利基专业化和在不同的环境中生存.
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