坎皮洛巴克特胎儿等离子体多样性:对完全测序等离子体的比较分析和拟议的分类方案
Nerea Pena-Fernández1,2, Linda van der Graaf-van Bloois3, Birgitta Duim3
1SERIDA, Servicio Regional de Investigación y Desarrollo Agroalimentario, Departamento de Sistemas de Producción Animal, 33300 Villaviciosa, Spain.
Genome biology and evolution
|October 11, 2024
概括
动物病原体Campylobacter胎儿中的等离子体对于基因转移至关重要,但研究不足. 这项研究比较了西班牙C.胎儿等离子体,揭示了两个主要的遗传集群,这对理解进化和病原性很重要.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 兽医科学 兽医科学 兽医科学
背景情况:
- 坎皮洛巴克特胎儿是一种重要的动物病原体,有两种与哺乳动物相关的亚种,C. fetus亚种. 胎儿 (Cff) 和C.胎儿亚种. 这种病名为Venerealis (Cfv).
- 塑体在抗菌素耐药性和毒性因子的传播中发挥着至关重要的作用,但C.胎儿塑体仍然在很大程度上未被探索.
- 了解C. fetus等离子体多样性对于解决其致病性和传播至关重要.
研究的目的:
- 来自西班牙Campylobacter胎儿分离物的等离体的遗传构成的特征.
- 将这些等离子体与现有的C. fetus等离子体序列以及相关的Campylobacterales物种的等离子体序列进行比较.
- 调查基于等离子体的分类的潜力,并了解它们的进化动态.
主要方法:
- 从西班牙C. fetus分离物中对12个封闭等离子体DNA序列进行测序和比较分析.
- 生物信息比较与公开可用的C. fetus等离子体序列和其他Campylobacterales基因组.
- 对基因内容的分析,包括放松酶,复制酶和SSB蛋白编码基因以及移动遗传元素.
主要成果:
- 西班牙C.胎儿等离子体范围从4到50kb,其中大多数 (10/12) 是潜在的结合性.
- 在西班牙C. fetus等离子体和来自其他地区的等离子体之间观察到密切的遗传关系,这与其他Campylobacter物种不同.
- 质粒被分为两个主要组,不论其地理来源或血统,基因分布支持这种分类.
- 较大的等离子体经常含有移动的遗传元素.
结论:
- 坎比洛巴克特胎儿等离子体在全球范围内表现出保存的遗传关系,形成了两个不同的群.
- 关键等离子体基因的分布可以帮助分类C. fetus plasmids.
- 这项研究提供了关于C. fetus等离子体的进化途径和致病潜力的见解,这对兽医和公共卫生至关重要.
相关概念视频
01:29Bacterial Phylum Chlamydiae
The phylum Chlamydiae or Chlamydiota is composed of a single order, Chlamydiales. This phylum consists entirely of obligate intracellular parasites that infect eukaryotic hosts. While human pathogens within this group have been studied extensively, the phylum encompasses many species capable of interacting with various eukaryotic organisms. Members of Chlamydiae are typically small cocci, approximately 0.5 μm in diameter, and exhibit a distinctive developmental cycle. As is characteristic...
02:54Evolutionary Relationships through Genome Comparisons
5.7K
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...
5.7K
01:26Bacterial Phylum Planctomycetes
Planctomycetes are a group of morphologically distinct bacteria predominantly classified into two orders: Planctomycetales and Brocadiales. These gram-negative bacteria exhibit unique features, including division by budding and the presence of stalks or appendages. Their cells are often found in rosette arrangements, and they are notable for possessing an S-layer in their cell envelope, which is relatively uncommon among bacteria. Additionally, Planctomycetes frequently exhibit intracellular...