一个广泛的扩展的断系统通过反压缩控制 lysis/lysogeny
Stav Kabel1, Shira Omer Bendori1, Tom Borenstein1
1Shmunis School of Biomedicine and Cancer Research, Faculty of Life Sciences, Tel Aviv University, 6139001 Tel Aviv, Israel.
许多Bacillus菌体在溶解-溶解生成决策中使用了任意系统. 一种新发现的抗抑制蛋白,AimX,与菌体抑制剂AimC结合,控制溶解激活和菌体生命周期策略.
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:
- 温和的细菌菌体利用任意系统来调节溶解-溶解生成决策.
- 分泌的AimP抑制AimR受体以促进 lysogeny,但下游的机制仍然不清楚.
研究的目的:
- 为了阐明Bacillus菌体中AimR介导的溶解控制的下游机制.
- 在仲裁系统中识别扩展五基因模块的功能.
主要方法:
- 生物信息分析用于识别保存的基因模块.
- 在多个菌体中进行实验验证.
- 蛋白相互作用的结构特征.
主要成果:
- 在约75%的任意系统中确定了一个保存的五基因模块,包括aimX,aimC和aimL.
- 一种小型抗抑制蛋白质AimX通过防止寡合化和DNA结合来抑制AimC抑制功能.
- 这种机制激活了pro-lytic aimL基因和其他lytic基因,因为它们在结构上和菌体之间得到了验证.
结论:
- 阐明了在任意系统中对菌体溶解-溶解生成控制的主要分子策略.
- 突出了像AimX这样的小抗抑制蛋白在菌体决策过程中的关键作用.
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