两个组成的调节系统GraRS和SrrAB调节Staphylococcus aureus对Pep5的敏感性,这种敏感性是由Staphylococcus epidermidis的临床分离产生的
Yujin Suzuki1,2,3, Miki Kawada-Matsuo1,4, Mi Nguyen-Tra Le1,4
1Department of Bacteriology, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan.
Applied and environmental microbiology
|June 4, 2024
概括
这项研究确定了由Staphylococcus epidermidis产生的兰西生物Pep5,对黄金菌Staphylococcus aureus有效. 它揭示了SrrAB两组系统和有氧呼吸会影响S. aureus中的Pep5敏感性.
科学领域:
- 微生物学 微生物学
- 抗微生物是一种抗菌.
- 细菌因子是一种细菌因子.
背景情况:
- 黄金葡萄球菌感染对健康构成重大威胁,因抗生素耐药性增加而加剧.
- 细菌素,如Pep5,是新型抗菌疗法的有希望的候选人.
- 了解细菌调节系统对于优化细菌的疗效至关重要.
研究的目的:
- 为了研究由Staphylococcus epidermidis生产的兰西生物Pep5的抗S. aureus活性.
- 为了确定 Staphylococcus aureus 两组分调控系统 (TCS) 在 Pep5 易感性中的作用.
- 阐明Pep5耐药性和易感性背后的机制.
主要方法:
- 确定了Pep5编码等离子体的核酸序列.
- 使用野生类型和TCS无活化的黄金色细菌突变体 (例如, ΔgraRS, ΔsrrAB) 进行了敏感性测试.
- 构建和分析了影响有氧呼吸的突变 (ΔqoxABCD, ΔcydAB).
主要成果:
- 斯塔菲洛科克斯 (Staphylococcus epidermidis) 菌株KSE112产生了具有抗S. aureus活性的Pep5.
- ΔgraRS突变体对Pep5的敏感性增加,而ΔsrrAB对氨基糖化物的敏感性和交叉耐药性降低.
- 无活化qoxABCD降低了对Pep5和氨基糖化物的敏感性,表明有氧呼吸的作用.
结论:
- 佩普5是一种有效的细菌素,可以对抗黄金色杆菌感染.
- SrrAB TCS和有氧呼吸,特别是qoxABCD表达,对于S. aureus对Pep5的敏感性至关重要.
- 通过TCS进行呼吸调节对于Pep5,nisin和 nukacin等细菌素的抗菌活性至关重要.
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