环境 布雷维亚特海港互利性 菌
Emmo Hamann1,2, Harald Gruber-Vodicka3, Manuel Kleiner2
1Microbial Fitness Group, Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359 Bremen, Germany.
Nature
|June 10, 2016
概括
新发现的Breviatea原生体与Arcobacter细菌形成了相互关系. 这种由转移驱动的共生增强了Breviatea的健康状况,并利用了通常与毒性相关的细菌因素.
科学领域:
- 微生物学
- 抗菌学
- 共生研究
背景情况:
- 布雷维亚是古老的,自由生活的单细胞原生体,与动物和真菌有着遥远的关系,由于古老的低氧海洋条件,它们通常具有无氧的生活方式.
- 布雷维亚与其他微生物的特定相互作用和代谢依赖性在很大程度上尚未研究.
研究的目的:
- 描述一个新发现的微生物,Lenisia limosa及其相关的微生物伙伴.
- 阐明L. limosa及其殖民细菌之间的相互作用的性质和分子机制,这些细菌被确定为Arcobacter的亲属.
主要方法:
- 种植新型简称林尼西亚.
- 生理实验以确定L. limosa与Arcobacter的相关性.
- 全基因组测序和差异蛋白质组学分析两种生物的分子变化.
- 重新分析其他Breviatea物种的现有转录基因数据.
主要成果:
- L. limosa和Arcobacter之间的关联是由转移驱动的相互共生,这对双方都有好处.
- 由于一种新的NAD (P) H接受酶,L. limosa表现出增加的适应性,只有在Arcobacter的存在下表达.
- 作为对Lenisia的反应,Arcobacter对通常参与动物细胞殖民的蛋白质进行上调 ("毒性因子"),这表明这些因子在致病和相互性方面都有双重作用.
结论:
- 布雷维亚和消耗的阿尔科巴克特之间可能存在广泛的相互作用.
- 最初在毒性环境中识别的分子机制可以重新使用,以促进有益的共生关系.
- 这项研究揭示了一种新的微生物伙伴关系,并强调了细菌"毒性"因素的适应性.
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