链球菌氨酸减小酶系统防御巨细胞杀菌作用由XRE家族蛋白XtrSss介导
Yumin Zhang1,2,3,4,5, Song Liang1,2,3,4,5, Shidan Zhang1,2,3,4,5
1Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Sanya, China.
Virulence
|January 22, 2024
概括
瑞士菌因适应性而使用氨酸减弱酶系统 (ADS). 一个调节器,XtrSs,控制ADS,影响细菌毒性和宿主免疫逃避.
科学领域:
- 微生物学 微生物学
- 细菌病原体的产生
- 分子生物学分子生物学
背景情况:
- 氨酸减轻酶系统 (ADS) 有助于细菌的能量生产和适应能力.
- 细菌中ADS的调节机制和病原性作用尚未完全理解.
研究的目的:
- 调查在Streptococcus suis.中ADS的调节机制.
- 确定XRE家族转录调节器XtrSs在S. suis病毒性和ADS调节中的作用.
主要方法:
- 在血液和酸性压力条件下进行细菌化.
- 电泳运动移位 (EMSA) 和 lacZ 聚变试验.
- 巨细胞感染测定和小鼠感染模型.
主要成果:
- XtrSs负面调节S. suis的毒性,并抑制ADS的转录.
- XtrSs直接与ArgR促进体结合,抑制了ArgR转录.
- 通过调节ADS,XtrSs的删除增强了巨细胞中的抗酸性和细胞内生存能力.
结论:
- 在S. suis中,一种新的ADS调节机制涉及XtrSs控制ADS以调节巨细胞NO含量.
- 这种调节促进了S. suis的细胞内生存和逃避宿主天生的免疫系统.
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