泰皮巴克特水热菌 sp. 的种类. Nov. 一种新型无氧细菌,从深海的热水风口中分离出来
Jie Dai1, Xue-Gong Li2,3,4,5, Wei-Jia Zhang2,3,4,5
1Aix Marseille Univ, CNRS, LCB, IMM, IM2B, Marseille, France.
International journal of systematic and evolutionary microbiology
|November 3, 2023
概括
一种新的无氧细菌Tepidibacter hydrothermalis SWIR-1^T在深海的热水喷口中被发现. 这种细菌表现出独特的代谢能力,并代表了Tepidibacter属内的新物种.
科学领域:
- 微生物学 微生物学
- 极端爱好者的研究是极端爱好者的研究.
- 深海生物学 深海生物学
背景情况:
- 深海的热水喷泉是独特的生态系统,拥有多样化的微生物.
- 泰皮迪巴克特属包括在各种环境中发现的无氧细菌.
- 了解极端环境中的微生物多样性对于生态和生物技术应用至关重要.
研究的目的:
- 从西南印度山脊水热喷气孔中分离和鉴定一种新的无氧异体细菌.
- 为了确定Tepidibacter属内的新型分离物的遗传学和基因组关系.
- 阐明新细菌物种的生理和化学分类学特性.
主要方法:
- 从深海热水风口样本中分离了SWIR-1^T菌株.
- 基于16S rRNA基因序列的遗传学分析.
- 基因组分析包括平均核酸标识 (ANI) 和数字DNA-DNA杂交 (dDDH).
- 生理学描述生长条件 (温度,pH,盐度) 和基质利用情况.
- 细胞脂肪酸和极性脂质的化学分类学分析.
主要成果:
- 菌株SWIR-1^T,一种新型无氧异质型细菌,被分离并确定为Tepidibacter属.
- 遗传学分析显示,与Tepidibacter mesophilus (99.1%) 的相似性最高. 然而,ANI和dddh值证实了它作为一个独特的物种的地位.
- 这种细菌是一种阳性,运动性,短杆的细菌,形成内体,在30°C,pH7.0和2.0%NaCl的温度下生长最佳.
- 它利用了广泛的基质,包括复杂的蛋白质,素和各种碳水化合物和氨基酸.
- 基因组分析揭示了一个独特的基因集群 (hyb-tat-hyp) 参与NiFe-酶合成.
结论:
- 菌株SWIR-1^T代表了一个新物种,Tepidibacter hydrothermalis sp. 基于全面的遗传学,基因组学,生理学和化学分类学数据.
- 这一发现扩大了Tepidibacter属在深海热水环境中的已知多样性.
- Tepidibacter hydrothermalis具有独特的代谢特征,包括利用多种基质和专门的酶系统,突出其适应极端深海风口环境的特点.
相关概念视频
01:21Hyperthermophilic Bacteria
21
Domain Bacteria includes some unique hyperthermophilic species. They exhibit remarkable adaptations that enable survival in extreme environments.Thermotoga species are rod-shaped, gram-negative, non-sporulating hyperthermophiles that form a sheath-like envelope called a toga. They ferment sugars or starch, producing lactate, acetate, CO₂, and H₂, and can also grow via anaerobic respiration using H₂ and ferric iron. Found in hot springs and hydrothermal vents, over 20% of their...
21
01:28Anoxygenic Phototrophic Bacteria
34
Anoxygenic phototrophic bacteria are a diverse group of microorganisms that perform photosynthesis without producing oxygen. They primarily include purple sulfur bacteria, purple nonsulfur bacteria, green sulfur bacteria, and green nonsulfur bacteria. These bacteria are classified into the Gammaproteobacteria, Alphaproteobacteria, Betaproteobacteria, Chlorobi, and Chloroflexi lineages, each with distinct physiological and ecological adaptations.Purple sulfur bacteria belong to the...
34
01:27Diversity of Archaea III
16
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...
16
01:30Diversity of Archaea I
18
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...
18
01:29Diversity of Archaea IV
35
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...
35
01:27Factors Influencing Microbial Growth: Temperature
22
Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
22