相关实验视频
Updated: Jul 18, 2025

10:55
Rescue of Recombinant Newcastle Disease Virus from cDNA
Published on: October 11, 2013
19.4K
核酸救援途径的组成部分增加青病毒3 (FV3) 复制
Samantha R Logan1, Mark Seegobin1, R J Neil Emery1
1Department of Biology, Trent University, 1600 West Bank Dr., Peterborough, ON K9J 7B8, Canada.
Viruses
|August 26, 2023
概括
诸如腺因和腺之类的外源性纯素显著增强青病毒3 (FV3) 复制. 这项研究揭示了纯素代谢.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 代谢生物化学 代谢生物化学
背景情况:
- 病毒,包括Ranavirus (例如,青病毒3 - FV3),是有义务的细胞内寄生虫.
- 已知宿主代谢途径,如葡萄糖和谷氨酸代谢,在虹膜病毒感染期间会发生变化.
- purin代谢在病毒复制中的作用以前没有被研究过.
研究的目的:
- 调查各种外源 purin 对青病毒3 (FV3) 复制的影响.
- 为了确定纯素补充是否会影响病毒斑块的形成.
- 探索代谢在FV3生命周期中的潜在作用.
主要方法:
- 感染FV3的细胞用一系列外源性纯素进行治疗:腺素,腺素,AMP,IMP,因素,SAH和SAM.
- 病毒复制量被量化为剂量依赖的方式每次纯素治疗.
- 测量病毒斑块大小,以评估纯素补充对病毒传播的影响.
主要成果:
- 大多数测试的精氨酸 (SAH除外) 显著增加了FV3复制量,以剂量依赖的方式.
- 氨酸和氨酸证明FV3复制的最实质性增强 (分别为58%和51%).
- 只有腺因治疗导致病毒斑块面积增加,这表明了独特的作用机制.
结论:
- 外源性纯氨酸,特别是腺因和腺,可以显著促进FV3复制.
- 腺素对FV3复制的刺激作用可能涉及与其他测试的纯素独立的途径.
- 这些发现凸显了素代谢在虹膜病毒感染中的重要性,并表明了未来研究的潜在途径.
相关概念视频
Viral Mutations
32.4K
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...
32.4K
Restarting Stalled Replication Forks
5.8K
DNA replication is initiated at sites containing predefined DNA sequences known as origins of replication. DNA is unwound at these sites by the minichromosome maintenance (MCM) helicase and other factors such as Cdc45 and the associated GINS complex.The unwound single strands are protected by replication protein A (RPA) until DNA polymerase starts synthesizing DNA at the 5’ end of the strand in the same direction as the replication fork. To prevent the replication fork from falling apart,...
5.8K
Translesion DNA Polymerases
10.0K
Translesion (TLS) polymerases rescue stalled DNA polymerases at sites of damaged bases by replacing the replicative polymerase and installing a nucleotide across the damaged site. Doing so, TLS allows additional time for the cell to repair the damage before resuming regular DNA replication.
TLS polymerases are found in all three domains of life - archaea, bacteria, and eukaryotes. Of the different classes of TLS polymerases, members of the Y family are fitted with specialized structures that...
TLS polymerases are found in all three domains of life - archaea, bacteria, and eukaryotes. Of the different classes of TLS polymerases, members of the Y family are fitted with specialized structures that...
10.0K
Biosynthesis of Nucleic Acids
75
Nucleic acid biosynthesis is a fundamental biochemical process that produces the purine and pyrimidine nucleotides essential for DNA and RNA synthesis. This pathway maintains a balanced nucleotide pool, preventing imbalances that could jeopardize genetic integrity and cellular function. Given the crucial role of nucleotides, their synthesis is tightly regulated to ensure proper cellular homeostasis.Purine BiosynthesisThe biosynthesis of purine nucleotides begins with ribose-5-phosphate, a...
75
Retrovirus Life Cycles
46.1K
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...
46.1K
Subviral Agents
41
Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...
41

