海洋浮游生物Actinobacteriota在深海适应的进化途径
Juan J Roda-Garcia1, Jose M Haro-Moreno1, Mario López-Pérez1
1Evolutionary Genomics Group, División de Microbiología, Universidad Miguel Hernández, Alicante, Spain.
Frontiers in microbiology
|May 26, 2023
概括
深海微生物,Acidimicrobiales,显示独特的基因组适应高压和低温. 这些海洋Actinobacteriota在深海的生物地球化学循环和碳降解中发挥着关键作用.
科学领域:
- 海洋微生物学 海洋微生物学
- 深海生态 深海生态
- 基因组学和生物信息学
背景情况:
- 深海有着庞大的微生物群落,对全球生物地化学循环至关重要.
- 微生物适应极端深海条件 (高压,低温,非热带) 尚不清楚.
- 在Actinobacteriota中的Acidimicrobiales顺序是海洋浮游生物细菌,居住在阿波特带.
研究的目的:
- 研究深海酸性微生物的进化路径和基因组适应.
- 描述这些深海细菌的生态基因分布和功能潜力.
- 了解它们在深海生态系统中的作用.
主要方法:
- 基因组学分析以定义深海属 (UBA3125,S20-B6,UBA9410). 基因组学分析以定义深海属 (UBA3125,S20-B6,UBA9410). 基因组学分析以定义深海属 (UBA3125,S20-B6,UBA9410). 基因组学分析以定义深海属 (UBA3125,S20-B6,UBA9410).
- 超基因组招募以确定跨海洋区域的分布模式.
- 对基因组结构,氨基酸组成和基因含量的比较基因组分析.
主要成果:
- 深海的Acidimicrobiales表现出独特的基因组结构 (更高的GC含量,更长的基因间空间) 和氨基酸组成 (更高的N-ARSC,更低的C-ARSC),反映了深水条件.
- 三种深水属表现出特定的分布模式:UBA3125在氧气最小区域 (带有脱基因),S20-B6在中至水区域,UBA9410在包括深区域在内的多样化分布.
- 这些微生物具有对有机碳和碳水化合物降解,糖原积累和复杂的转录调节的增强代谢能力,包括一个独特的WhiB对应物,弥补了罗多素缺乏.
结论:
- 深海的Acidimicrobiales是独特地适应了亚波特区,具有明显的基因组和代谢特征.
- 这些细菌在深海碳循环,重矿化和循环 (在OMZ中) 中发挥着重要作用.
- 这项研究扩大了我们对地球上最大的生物群体微生物生命和适应性的理解.
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