菌体和宿主因子之间的敌对相互作用控制了任意的溶解-溶解生成决定
Sara Zamora-Caballero1, Cora Chmielowska2, Nuria Quiles-Puchalt2,3
1Instituto de Biomedicina de Valencia (IBV)-CSIC and CIBER de Enfermedades Raras (CIBERER)-ISCIII, Valencia, Spain.
Nature microbiology
|January 4, 2024
概括
称为菌体的细菌病毒使用通信系统来决定杀死宿主细胞 (溶解) 或集成到它们的DNA中 (溶解). 这项研究揭示了菌体phi3T如何操纵细菌毒素-抗毒素系统来控制这种决定.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 病毒学 病毒学
背景情况:
- 菌体 (菌体) 采用通信系统,如仲裁系统,来调节它们的生命周期决策.
- 菌体协调溶解-溶解生成决策的精确分子机制在很大程度上是未知的.
- 细菌毒素-抗毒素系统,如MazE-MazF,对于细胞过程至关重要,可以成为菌体操纵的目标.
研究的目的:
- 阐明细菌细菌菌体phi3T中任意系统调节 lysis-lysogeny决策的机制.
- 为了研究菌体任意系统和细菌MazE-MazF毒素-抗毒素系统之间的相互作用.
- 了解菌体用来控制其生命周期的进化策略.
主要方法:
- 研究了菌体蛋白 (AimX,YosL,phi3T_93,AimP) 和细菌毒素-抗毒素成分 (MazE,MazF) 之间的相互作用.
- 利用分子生物学技术分析MazF活动的调节和MazE-MazF复合体的形成.
- 研究了菌灭剂AimR及其AimP调节在控制菌基因表达中的作用.
主要成果:
- 体phi3T蛋白AimX和YosL直接结合并使细菌毒素MazF无活化.
- 此外,AimX还抑制了phi3T_93,这是一种通过与MazE.相互作用来促进 lysogeny 的蛋白质.
- 菌AimP的积累导致AimR的失活,停止aimX表达,并通过允许MazF活动来促进溶解生成.
结论:
- 菌体phi3T中的任意系统劫持了细菌MazE-MazF毒素-抗毒素系统,以控制溶解-溶解生成决策.
- 菌体策略包括最初通过MazF无活化促进溶解,然后通过AimP介导调节实现溶解生.
- 这项研究揭示了一种进化机制,即菌体适应细菌防御系统,以调节自身的生命周期.
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