在泰国发现的猫类博卡病毒已经经历了基因重组,以实现它们的进化
Pattiya Lohavicharn1, Tanit Kasantikul2, Chutchai Piewbang1
1Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand; Animal Virome and Diagnostic Development Research Unit, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand.
概括
遗传重组驱动猫类口腔病毒 (FBoV) 进化,在NP1和VP1/2基因中发现了重组热点. 这项研究揭示了FBoV-1,-2和-3在泰国是特有的,为FBoV遗传多样性和演变提供了关键的见解.
科学领域:
- 兽医病毒学 兽医病毒学
- 分子进化分子进化
- 猫类传染病 猫类传染病
背景情况:
- 猫口病毒 (FBoV) 在猫便中越来越多地被检测到,可能与腹有关.
- 关于FBoV进化的研究有限,特别是关于遗传重组的研究.
- 了解FBoV演变对于管理猫科动物健康至关重要.
研究的目的:
- 描述泰国FBoVs的遗传多样性和进化动态.
- 调查基因重组在FBoV进化中的作用.
- 分析作用于FBoV基因的选择性压力.
主要方法:
- 来自泰国猫的FBoV的19个完整编码序列的测序.
- 遗传学分析以确定遗传关系.
- 重组分析以确定重组事件和断点.
- 选择性压力分析 (dN/dS比) 来评估进化约束.
主要成果:
- 发现FBoV-1,-2和-3在泰国是特有的,与来自泰国和中国的菌株有密切的遗传联系.
- 在所有FBoV物种中检测到内基,物种内重组,NP1和VP1/2基因被确定为重组热点.
- 纯化选择在FBoV基因中普遍存在,有证据表明FBoV-1和FBoV-3的积极选择.
- 这项研究为FBoV-2和FBoV-3的自然重组提供了第一个证据.
结论:
- 遗传重组是猫口病毒进化的重要因素.
- NP1和VP1/2基因是FBoV重组的关键领域.
- 泰国的FBoV表现出特定的进化模式和选择性压力,需要持续监测.
相关概念视频
00:57Viral Recombination
23.3K
Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
23.3K
00:36Viral Mutations
32.2K
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
32.2K