关键翻译因子的水平基因转移及其在聚烯蛋白质组进化中的作用
Tess E Brewer1, Andreas Wagner2,3,4
1Faculty of Biology, Microbiology, Ludwig Maximilian University of Munich, Munich, Germany.
Molecular biology and evolution
|August 27, 2024
概括
细菌在聚烯基基图案上的转化停滞由延长因子P (EF-P) 缓解. EF-P 的水平基因转移与依赖于它的蛋白质的损失有关,留下了古老功能障碍的基因组痕迹.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 进化生物学 进化生物学
背景情况:
- 翻译过程中的核糖体停滞是一个常见的挑战,特别是在聚烯基图案中,影响所有生命领域.
- 已知延长因子P (EF-P) 可以缓解细菌中的这种停滞.
研究的目的:
- 研究细菌中efp基因水平基因转移的基因组后果.
- 为了确定与水平基因转移后EF-P功能障碍相关的特定蛋白质和基因组特征.
主要方法:
- 在多种细菌族群中进行比较基因组学分析,重点是Thermotogota和Planctomycetes.
- 识别水平EF-P转移事件和相关的基因损失.
- 在对EF-P功能敏感的蛋白质中检查保存的聚烯基基图案.
主要成果:
- 在细菌中证实了多个水平EF-P基因转移的实例.
- 观察到水平EF-P转移和含有多烯基基因的蛋白质损失之间的相关性,包括蛋白质酶 (Lon,ClpC,FtsH) 和tRNA合成酶 (ValS,IleS1,IleS2).
- 这些受影响蛋白质中的聚烯基基因通常位于关键的ATP结合区域附近.
结论:
- 古老的EF-P功能障碍在细菌中留下了持久的基因组签名.
- EF-P 的水平基因转移,以及随后的适应,可能导致必需蛋白质的损失,并可能改变 EF-P 的整体功能.
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