公共可用的尼塞利亚淋病基因组主要代表在体外衍生的非皮化变体中
Iryna Boiko1, Selma Metaane1, H Steven Seifert1
1Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA.
The Journal of infectious diseases
|December 3, 2025
概括
大多数分析的Neisseria gonorrhoeae菌株具有非功能pilE基因,这表明它们来自非皮化变体. 这种柱子变异影响着菌种群多样性和免疫逃避策略.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 细菌病原体的产生
背景情况:
- 尼塞利亚淋病菌利用pilE基因,编码IV型pilus主要子单元,用于殖民和毒性.
- 通过从pilS副本中转换基因来实现pilE的高频多样化,有助于免疫逃避和人口多样性.
- 关于临床隔离物中pilE和pilS基因多样性的数据有限.
研究的目的:
- 为了描述Neisseria gonorrhoeae中pilE和pilS基因的多样性.
- 在临床隔离物中调查功能性pilE基因的流行率.
主要方法:
- 来自PubMLST数据库的15186个尼塞利亚淋病基因组的分析.
- 包括完成的 (n=65) 和草稿 (n=15,121) 基因组序列.
主要成果:
- 虽然pilS位点很常见 (每基因组1-9个),但只有52.13%的序列含有pilE基因.
- 当存在时,pilE基因在很大程度上保留了保存的序列,但许多预测的Pile蛋白质有过早停止的编码子.
- 在无声的 pilS 副本中也观察到过早停止的编码子.
结论:
- 所有的菌株都具备用于pilin AV的遗传机制.
- 大多数分析的基因组序列代表非化变异,可能是由于体外培养诱导的化相变异和pilE基因删除.
- 这表明,大量的N. gonorrhoeae可能存在于非皮化形式.
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