小调节性RNA是Streptococcus mutans中介的SloR调节子
India Y Drummond1, Alessandra DePaolo1, Madeline Krieger2
1Department of Biology, Middlebury College , Middlebury, Vermont, USA.
Journal of bacteriology
|September 11, 2023
概括
小调节RNAs (sRNAs) 控制了Streptococcus mutans中的毒性,这是导致牙损伤的关键原因. 研究人员确定了对含量和SloR蛋白反应的特定sRNA,揭示了抗脏治疗的新点.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 牙损伤是一种普遍存在的全球性疾病,由*Streptococcus mutans*引起.
- *菌突变菌*利用依赖的SloR蛋白调节病毒性基因表达.
- 小型非编码RNAs (sRNAs) 越来越多地被认为是它们在细菌应激反应和基因调节中的作用.
研究的目的:
- 研究小型非编码RNAs (sRNAs) 在调解*S. mutans* SloR和调节子中的作用.
- 在*Streptococcus mutans*中识别和表征SloR和敏感的sRNA.
- 阐明涉及sRNAs在这个重要的口腔病原体中的调节网络.
主要方法:
- 用RNA测序来识别SloR-proficient和SloR-deficient *S. mutans*菌株中的差异转录的sRNA.
- 在不同度下对*S. mutans*进行了sRNA的差异表达分析.
- 电泳运动转移试验 (EMSAs) 用于确认sRNAs与SloR促进器区域的直接结合.
主要成果:
- 发现19个sRNA在UA159 (SloR-proficient) 和GMS584 (SloR-deficient) 菌株之间进行了差异化转录.
- 在UA159.9中,十个sRNA在低与高条件的反应中表现出差异性表达.
- 确定SmsR1532和SmsR1785是直接的SloR和响应的sRNA,它们与SloR促进子区域结合.
- 这些sRNA的预测目标包括金属离子运输的调节者,毒素-抗毒素系统和氧化应激反应.
结论:
- sRNAs在协调细胞内金属离子恒温与*Streptococcus mutans*中毒性基因控制方面发挥着重要作用.
- SmsR1532和SmsR1785是和SloR依赖基因调节的关键媒介.
- 了解这些sRNA介导的调节网络为开发新型抗病疗法提供了潜力.
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