多环境生态基因组学分析大众族群Gemmatimonadota的多环境生态基因组学分析
Izabela Mujakić1,2, Pedro J Cabello-Yeves3,4,5, Cristian Villena-Alemany1,2
1Laboratory of Anoxygenic Phototrophs, Institute of Microbiology of the Czech Academy of Sciences , Třeboň, Czechia.
Microbiology spectrum
|September 21, 2023
概括
在不同的环境中发现的Gemmatimonadota细菌,表现出不同的基因组适应. 海洋物种的基因组较小,这表明它们适应了缺乏营养的条件,而代谢途径因息地而异.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 环境科学 环境科学
背景情况:
- 吉马蒂莫纳多塔是一种多样化的细菌系,培养物种有限,阻碍了对其代谢和生态作用的理解.
- 以前的研究表明,Gemmatimonadota居住在各种环境中,包括土壤,淡水和沉积物.
- 文化独立的方法已经揭示了更广泛的分布,但由于很少的隔离物,基因组洞察力仍然很少.
研究的目的:
- 分析Gemmatimonadota在各种环境领域的基因组特征和代谢潜力.
- 为了研究进化适应和息地特有的特征在Gemmatimonadota属.
- 通过使用元基因组组装基因组 (MAG) 扩大对Gemmatimonadota多样性和功能的理解.
主要方法:
- 分析了400多个元基因组组装基因组 (MAGs) 和5个Gemmatimonadota.的培养衍生基因组.
- 基因组学分析和主要坐标分析基于基因的存在/不存在.
- 代谢途径的比较基因组分析,包括碳固定和循环基因.
主要成果:
- 海洋和宿主相关的Gemmatimonadota在遗传学上与淡水和废水物种相距甚远.
- 海洋MAG表现出更小的基因组大小和减少的编码序列,这表明它们适应了寡度营养环境.
- 特定的代谢途径,如无氧光和不同类型的RuBisCO,在不同的环境群体中发现.
结论:
- Gemmatimonadota的基因组是根据环境适应进行重塑的,这表明从有机养有氧呼吸开始的进化轨迹.
- 减少N2O的nosZ基因在息地之间存在差异,在海洋和宿主相关群体中不存在.
- 这项研究提供了Gemmatimonadota的全面基因组概述,揭示了跨环境的显著代谢和适应性多样性.
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