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蛋白质碎片的持续混合使核心病毒功能多样化,这些功能与与细菌宿主相互作用有关
Bogna J Smug1, Krzysztof Szczepaniak1, Eduardo P C Rocha2
1Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland.
Nature communications
|November 28, 2023
概括
细菌病毒 (菌体) 使用蛋白质模块化,在无关的蛋白质之间共享域,以提高适应性. 这种域混合驱动了快速的进化,特别是在关键的病毒蛋白中,有助于对抗细菌防御的生存.
科学领域:
- 进化生物学是进化的生物学.
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 生物模块化,特别是细菌病毒 (菌体) 的基因组模块化,增强了进化的适应性.
- 菌体表现出广泛的基因组模块化,独立的功能模块进化和重组.
- 蛋白质模块性,涉及不同的,不断演变的蛋白质构建块,研究较少,但对多样性至关重要.
研究的目的:
- 通过分析域马赛克主义 (非相关蛋白质之间的片段共享) 来研究菌体中的蛋白质模块性.
- 了解菌体基因组中的域马赛克主义和功能多样性之间的关系.
- 在菌体蛋白质进化中识别域混合的实例和模式.
主要方法:
- 使用了133,574个代表性菌素蛋白的数据集.
- 采用敏感的同质检测来识别域的马赛克.
- 分析了跨不同功能类的域共享模式,重点关注受体结合蛋白,内素和DNA聚合酶.
主要成果:
- 来自各种功能类的非相关的菌体蛋白经常共享同源域.
- 域马赛克主义在受体结合蛋白,内素和DNA聚合酶中突出.
- 在受体结合蛋白,部通道结构,内素和复制机制中发现了最近的域混合,跨越了分类学和生态界限.
结论:
- 通过域混合的蛋白质模块化是菌体功能和遗传多样性的重要驱动因素.
- 域混合有助于菌素蛋白的快速演变,特别是那些参与宿主相互作用和复制的蛋白质.
- 这种多样化反映了对抗细菌耐药机制的进化军备竞赛.
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