对Enterococcus faecium和Enterococcus lactis的对比泛基因组分析为通过水平基因收购的适应性进化提供了新的见解
Dae Gyu Choi1, Ju Hye Baek1, Dong Min Han1
1Department of Life Science, Chung-Ang University, 84, HeukSeok-Ro, Dongjak-Gu, 06974, Seoul, Republic of Korea.
BMC genomics
|January 3, 2024
概括
对泛基因组进行比较分析显示,Enterococcus faecium (E. faecium) 已经演变为两个亚分类,人类适应的亚分类II菌株通过横向基因转移获得抗生素耐药性和毒性基因,以使病原体存活.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 进化生物学 进化生物学
背景情况:
- 乳球菌 (E. faecium) 和乳球菌 (E. lactis) 是密切相关的乳酸细菌,具有重要的工业和临床意义.
- 尽管它们很重要,但对它们的进化关系和特征的全面研究是有限的.
- 对这些物种的可用基因组进行了对比性泛基因组分析.
研究的目的:
- 为了研究E. faecium和E. lactis之间的进化关系.
- 为了确定物种和子类之间的基因组,代谢和病原性差异.
- 要了解E. faecium菌株的适应性进化.
主要方法:
- 无复制基因组的对比泛基因组分析.
- 对物种和基因获取的遗传学分析.
- 基因组大小和基因含量比较.
主要成果:
- E. faecium分为两个子类:I (人类,动物,食品) 和II (人类衍生的).
- E. lactis菌株没有通过隔离来源显示出明显的集群.
- E. faecium亚分类II菌株的基因组更大,基因数更高,抗生素耐药性,毒性和移动元素基因更多.
- 水平基因转移与E. faecium亚分类II.获得这些基因有关.
结论:
- E. faecium亚分类II菌株通过横向基因获取表现出适应性进化.
- 这些适应促进了人类环境中作为病原体的生存.
- 这项研究提供了对E. faecium病原性的基因组基础的见解.
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