对基因组的比较分析揭示了Nitrospirales序列内的广泛的遗传学和功能多样性
Linnea F M Kop1,2,3, Hanna Koch1,4, Daan Speth2
1Department of Microbiology, Radboud Institute for Biological and Environmental Sciences, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, the Netherlands.
The ISME journal
|July 22, 2025
概括
这项研究揭示了关键氨氧化细菌Nitrospirales在各种环境中的适应性. 新的基因组数据揭示了新的血统,并突出了它们在循环中的广泛生态作用.
科学领域:
- 微生物学 微生物学
- 环境科学 环境科学
- 基因组学就是基因组学.
背景情况:
- 化是循环中的一个关键的微生物过程,由化学和自营菌驱动.
- 化物 (Nitrospirales) 序列,包括化物,是氨氧化成酸盐和酸盐的核心.
研究的目的:
- 对Nitrospirales进行全面的基因组分析,包括新测序的基因谱.
- 为了研究息地分布,植物遗传多样性和Nitrospirales的功能能力.
- 为了比较基于基因组和基于16S rRNA基因的分类学,并识别保存的基因.
主要方法:
- 来自未测序血统的九个Nitrospirales成员的基因组测序.
- 用446个Nitrospirales基因组的数据库进行了家族基因组分析.
- 检查息地分布,功能能力和基因含量.
主要成果:
- 发现了其他未分类的Nitrospirales血统,并比较了分类方法.
- 在某些族群中确定息地偏好,在其他族群中确定广泛的利基范围.
- 有适应性呼吸道和同化机制的证据,以及超越II系的质量检测.
结论:
- 尼特罗螺旋体表现出不同环境的显著适应性,发现了新的分类谱系.
- 基因组洞察力揭示了关键代谢途径的模块化以及定数感应的更广泛的生态意义.
- 对于含有亚酸盐氧化降解酶的亚螺旋体独特的保存基因,为它们的功能性出现提供了线索.
相关概念视频
02:16Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
13.5K
The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
13.5K
02:54Evolutionary Relationships through Genome Comparisons
6.2K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
6.2K
01:24Diversity of Archaea II
100
Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...
100
01:27Diversity of Archaea III
78
Crenarchaeota, a prominent phylum of Archaea, is remarkable for its ability to thrive in extreme environments characterized by high temperatures and acidity. These microorganisms inhabit sulfuric hot springs, volcanic systems, and submarine hydrothermal vents, where temperatures often exceed 100°C. The unique adaptations of Crenarchaeota not only allow survival under such extreme conditions but also provide insights into the mechanisms of life in primordial Earth-like...
78
01:30Diversity of Archaea I
106
Archaea, a domain of single-celled microorganisms, are classified into five major phyla based on genetic and biochemical characteristics: Euryarchaeota, Crenarchaeota, Thaumarchaeota, Korarchaeota, and Nanoarchaeota. Among these, the phylum Euryarchaeota is notable for its remarkable diversity in morphology, metabolism, and ecological adaptations.Morphological and Metabolic DiversityMembers of Euryarchaeota exhibit a variety of cellular shapes, including rods and cocci. Their metabolic pathways...
106
01:29Diversity of Archaea IV
114
Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...
114