微生物通过移动遗传元素的代谢重塑改变了互惠社区的组成
Ave T Bisesi1, Ross P Carlson2,3, Lachlan Cotner1
1Department of Ecology, Evolution and Behavior, University of Minnesota, St. Paul, Minnesota, USA.
mSystems
|August 15, 2025
概括
移动遗传元素 (MGE) 间接改变细菌的新陈代谢,影响生长和资源使用. 这会影响微生物社区的结构和功能,即使没有新的代谢基因.
科学领域:
- 微生物学 微生物学
- 代谢工程是代谢工程.
- 生态生态学 生态生态学
背景情况:
- 移动遗传元素 (MGE) 在 prokaryotes 中广泛存在,并对微生物群落产生重大影响.
- MGEs可以通过引入新的酶直接改变宿主代谢,或通过转移宿主资源用于MGE复制来间接改变宿主代谢.
- MGEs对宿主特征和物种间相互作用的间接代谢影响尚未完全理解.
研究的目的:
- 研究MGE携带对细菌相互作用的间接代谢后果.
- 为了确定MGEs如何影响宿主特征,如生长速度和排泄概况.
- 评估MGE诱导的代谢转变对微生物社区结构的影响.
主要方法:
- 采用了基因组规模的代谢建模 (流量平衡分析).
- 建立了一个体外强制性交叉养系统.
- 这项研究利用了包括大肠杆菌 (Escherichia coli),大肠杆菌 (Salmonella enterica) 和大肠杆菌 (Methylobacterium extorquens) 在内的多种群体,在大肠杆菌中使用了两种MGE (等离子体F128和菌体M13).
主要成果:
- 模型和实验都表明,MGE携带改变了大肠杆菌的生长速度和分泌模式.
- 由MGEs引起的间接代谢变化导致交叉养物种的密度增加.
- 没有MGE的细胞和携带MGE的细胞表现出不同的代谢特征,影响社区动态.
结论:
- MGEs可以显著改变细菌代谢和社区相互作用,即使没有编码新的代谢功能.
- MGEs的间接代谢影响是微生物社区结构和生态系统功能的关键驱动因素.
- 这项研究强调了考虑MGEs在微生物生态中的间接代谢影响的重要性.
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