2022年在多个国家引起疫情的麻疹病毒Clade IIbb分子演变
Perumal Arumugam Desingu1, Tirutani Parthasarathi Rubeni1, K Nagarajan2,3
1Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru 560012, India.
iScience
|January 8, 2024
概括
分析了与最近爆发相关的麻疹病毒 (Mpoxv) 类IIb的遗传变异. 确定了特定的突变,提供了关于这一重大公共卫生问题的演变的见解.
科学领域:
- 病毒学 病毒学
- 遗传学 遗传学 是一个
- 流行病学 流行病学
背景情况:
- 自2017年以来,病毒 (Mpoxv) 类IIb一直与全球重大疫情有关.
- 了解Clade IIb的遗传构成至关重要,特别是考虑到它与特有Clade IIa病毒的关系.
- 关于导致Clade IIb疫情爆发的特定遗传变异的先前知识仍然有限.
研究的目的:
- 系统地分析和描述不同Mpox病毒类的基因变异.
- 识别特定的遗传变异,使与流行病相关的IIb类与其他类区分开来.
- 为了阐明Mopox病毒Clade IIb的进化途径.
主要方法:
- 对Mopox病毒类的系统比较基因组分析.
- 识别和描述各种遗传变异,包括基因组间隙,框架转移突变和APOBEC3突变.
- 在Clade I,Clade IIa和Clade IIb中分析基因特异变异.
主要成果:
- 马波克斯v Clade IIb 呈现出明显的遗传变异,包括基因组间隙,框架转移突变,框架内无意义突变,氨基酸并列重复和APOBEC3突变.
- 在Clade I和Clade IIb共同的基因中发现了特定的遗传变异.
- 发现了独特的遗传变异,区分了Clade IIa和Clade IIb.
结论:
- 这项研究强调了Mopox病毒Clade IIb.中的显著遗传变异.
- 这些发现为最近的Mpoxv Clade IIb疫情的演变和驱动因素提供了关键的见解.
- 鉴定的遗传差异可能有助于Clade IIb.的独特流行病学行为.
相关概念视频
00:36Viral Mutations
32.3K
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...
32.3K
00:57Viral Recombination
23.4K
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.
23.4K
01:18Steps in Outbreak Investigation
131
In the ever-evolving field of public health, statistical analysis serves as a cornerstone for understanding and managing disease outbreaks. By leveraging various statistical tools, health professionals can predict potential outbreaks, analyze ongoing situations, and devise effective responses to mitigate impact. For that to happen, there are a few possible stages of the analysis:
131
01:10Retrovirus Life Cycles
46.0K
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
46.0K
01:05Single Nucleotide Polymorphisms-SNPs
15.1K
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,...
15.1K
01:09Mutation, Gene Flow, and Genetic Drift
58.4K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
58.4K