重新思考古典猪瘟病毒的遗传学:NS3优于传统的基因标记物
Nagarajan Siddharthan1, Vijay Muruganantham1, Roopa Mahadevaswamy1
1ICAR-National Institute of Veterinary Epidemiology and Disease Informatics, Yelahanka, Bengaluru, 560 119, Karnataka, India.
Journal of virological methods
|March 9, 2026
概括
通过使用NS3基因,可以改善古典猪瘟病毒 (CSFV) 监测. 这种基因准确地反映了全基因组的进化模式,为跟踪病毒传播提供了对全基因组测序的经济有效替代方案.
科学领域:
- 兽医病毒学 兽医病毒学
- 分子流行病学分子流行病学
- 基因组学就是基因组学.
背景情况:
- 经典猪瘟病毒 (CSFV) 对全球猪产品构成重大威胁,其特点是高传染性和频繁爆发.
- 目前的控制策略因CSFV的遗传多样性而受到挑战,需要改进监测方法.
- 全基因组测序虽然准确,但由于成本和时间的限制,常常无法用于例行监测.
研究的目的:
- 确定特定的CSFV基因组区域,可靠地代表整个基因组的进化关系.
- 寻找强大的替代方案,以完成基因组测序,用于遗传学推断和分子流行病学.
- 提高CSFV监测和疫情调查的有效性.
主要方法:
- 分析了67个完整的CSFV基因组,涵盖主要的基因型和亚基因型.
- 两对遗传距离的全基因组和基因相关性分析.
- 使用最大概率框架进行比较的家族遗传重建.
主要成果:
- 非结构基因NS3,NS5A和NS5B与全基因组遗传距离和替代模型一致性有很强的相关性.
- NS3基因表现出最高的一致性,产生密切反映全基因组拓的家族遗传树.
- 通常使用的E2基因显示一致性降低,限制了其作为独立的遗传学标记物的实用性.
结论:
- NS3基因被确定为CSFV全基因组遗传学推断中最可靠的全基因替代品.
- 这一发现为精确的CSFV分子流行病学提供了实际框架.
- 该研究通过提供更容易获得的测序替代方案,促进了CSFV加强的监视.
相关概念视频
02:54Evolutionary Relationships through Genome Comparisons
7.1K
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...
7.1K
01:29Modern Molecular Taxonomy
804
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
804
01:29Viruses with RNA Genomes
1.2K
RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
1.2K
02:05Gene Evolution - Fast or Slow?
8.3K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
8.3K
01:20Applications of Molecular Taxonomy
641
Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
641
01:05Single Nucleotide Polymorphisms-SNPs
19.3K
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
19.3K