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相关概念视频

Viral Recombination00:57

Viral Recombination

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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.
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Viral Mutations00:36

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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...
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Viral Structure00:56

Viral Structure

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Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
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Microbial Classification System01:24

Microbial Classification System

Classification is the process of organizing organisms into hierarchically inclusive groups based on their phenotypic similarities or evolutionary relationships. A species comprises one or more strains, and closely related species are grouped into genera. Genera are further classified into families, families into orders, orders into classes, and so forth, up to the domain level, which is the broadest taxonomic rank derived from a combination of phenotypic and genotypic data.The nomenclature of...

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相关实验视频

Updated: Jun 4, 2025

Isolation and Genome Analysis of Single Virions using 'Single Virus Genomics'
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Isolation and Genome Analysis of Single Virions using 'Single Virus Genomics'

Published on: May 26, 2013

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GRAViTy-V2:一个基于病毒分类的应用程序.

Richard Mayne1, Pakorn Aiewsakun2, Dann Turner3

  • 1Peter Medawar Building for Pathogen Research, Nuffield Department of Medicine, University of Oxford, 3 South Parks Road, OX1 3SY Oxfordshire, UK.

NAR genomics and bioinformatics
|December 20, 2024
PubMed
概括
此摘要是机器生成的。

基因组关系应用于病毒分类学版本2 (GRAViTy-V2) 提供了一种强大的,自动化的病毒分类方法. 该工具准确地将病毒分类到物种水平,匹配专家策划的分类学,并改进进化研究.

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相关实验视频

Last Updated: Jun 4, 2025

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Isolation and Genome Analysis of Single Virions using 'Single Virus Genomics'

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Phage Phenomics: Physiological Approaches to Characterize Novel Viral Proteins
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Phage Phenomics: Physiological Approaches to Characterize Novel Viral Proteins

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科学领域:

  • 病毒学 病毒学
  • 生物信息学是一种生物信息学.
  • 基因组学就是基因组学.
  • 纳税学是一种分类学.

背景情况:

  • 准确的病毒分类对于理解病毒进化和疾病至关重要.
  • 目前的方法依赖于高等级的氨基酸基因和较低等级的核酸标识.
  • 现有的框架需要优化,以获得更广泛的适用性和效率.

研究的目的:

  • 介绍基因组关系应用于病毒分类学版本2 (GRAViTy-V2),一种用于病毒分类的增强计算工具.
  • 评估GRAViTy-V2的性能与专家策划的病毒分类学.
  • 为基因组病毒分类提供一个通用,优化的应用程序.

主要方法:

  • 开发GRAViTy-V2,包括扩展功能和优化.
  • 基于ICTV 2022分类学提案的28个数据集的分析.
  • 将GRAViTy-V2输出与ICTV 2023轮人类专家策划的分类进行比较.

主要成果:

  • GRAViTy-V2生成的分类学相当于在家族,属和物种层面的手册分类.
  • 差异主要归因于编码序列注释错误或不完整的基因组数据.
  • 分析时间高效,在各种数据集中平均为3.59分钟.

结论:

  • GRAViTy-V2是用于自动化病毒分类学分类的强大而有效的工具.
  • 该工具与专家驱动的分类有很高的一致性,支持其在常规分类学中的使用.
  • 在序列记录中解决数据质量问题将进一步提高分类准确性.