不同的调节途径调节了Streptococcus pneumoniae在表观遗传差异化阶段变异中的能力诱导的注对冲
Min Jung Kwun1, Alexandru V Ion1, Marco R Oggioni2,3
1MRC Centre for Global Infectious Disease Analysis, Sir Michael Uren Hub, White City Campus, Imperial College London, London W12 0BZ, UK.
Nucleic acids research
|September 27, 2023
概括
由于不同的甲基化模式,Streptococcus pneumoniae的转化效率有所不同. 这影响了抗生素耐药性和疫苗规避,突出了细菌适应过程中的复杂监管网络.
科学领域:
- 微生物学 微生物学
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
背景情况:
- 肺炎链球菌的转变对于获得抗生素耐药性和逃避免疫力至关重要,但发生的速度各不相同.
- 由于转移变量限制-修改 (tvr) 位点,相变异因甲基化模式不同,表现出明显的转换效率和生物膜形成.
研究的目的:
- 调查Streptococcus pneumoniae.中变量转化效率的基础分子机制.
- 阐明硬部位和相关的调节途径在调节能力和生物膜形成中的作用.
主要方法:
- 使用RNA测序 (RNA-seq) 对相变异进行比较分析.
- 基因操纵是为了在衍生菌株中引入tvr等位基因.
- 评估转化效率,生物膜厚度和基因表达水平.
主要成果:
- 1型皮勒斯的差异表达与生物膜变异相关.
- 由于ManLMN表达率较低,在较少可变的变体 (RMV7domi) 中抑制了能力诱导.
- 在RMV7domi中,活性菌体相关的染色体岛屿增加了应激蛋白 (ClpP,HrcA),抑制了转化,而HrcA的效果因另一种变异的条件而异.
结论:
- 在Streptococcus pneumoniae转化效率的异质性源于复杂的,相互连接的信号通路.
- 监管的复杂性影响了人口层面的反应,有助于对应适应的投注对冲行为.
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