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相关概念视频

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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Retroviruses02:33

Retroviruses

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Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
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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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Retrovirus Life Cycles01:10

Retrovirus Life Cycles

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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...
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Viral Mutations00:36

Viral Mutations

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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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Mechanisms of Retrovirus-induced Cancers01:51

Mechanisms of Retrovirus-induced Cancers

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Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
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相关实验视频

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Prediction of HIV-1 Coreceptor Usage Tropism by Sequence Analysis using a Genotypic Approach
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基于病毒基因组组成预测因子介导的相互作用.

Sobia Idrees1,2, Keshav Raj Paudel2, Mithila Banik3

  • 1School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2033, Australia.

International journal of molecular sciences
|May 7, 2025
PubMed
概括

病毒模仿宿主蛋白质,使用短线性图案 (SLiM) 感染细胞. 这项研究揭示了病毒基因组组成,特别是dsDNA病毒,影响这种仿真,影响病毒与宿主相互作用和抗病毒疗法开发.

关键词:
生物信息学是一种生物信息学.简短的线性图案.病毒模仿病毒模仿病毒与宿主之间的相互作用

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科学领域:

  • 病毒学和分子生物学
  • 生物信息学和计算生物学

背景情况:

  • 病毒劫持宿主细胞机械进行复制,通常通过模仿宿主蛋白质短线性图案 (SLiM).
  • 由于SLiM的固有退化,难以预测病毒模拟,尽管病毒宿主蛋白蛋白相互作用 (vhPPI) 数据越来越多.

研究的目的:

  • 为了研究病毒基因组组成对SLiM仿真的影响.
  • 阐明病毒利用SLiM劫持宿主细胞功能的机制.
  • 为了识别由SLiMs调解的新型病毒与宿主相互作用.

主要方法:

  • 在各种病毒群体中评估了域-基因相互作用 (DMI) 丰富差异.
  • 利用SLiMEnrich v.1.5.1来预测基于已知的病毒动机在不同的严格度水平的新型DMI.
  • 分析了病毒基因组合在SLiM模仿和vhPPI中的作用.

主要成果:

  • 双链DNA (dsDNA) 病毒显示,与其他病毒类型相比,已知DMI的捕获率显著更高.
  • 双链RNA (dsRNA) 病毒表现出比单链RNA (ssRNA) 病毒更大的DMI丰富.
  • 鉴定了由SLiM调解的新型VhPPI,在不同的病毒基因组环境中观察到特定的模式.

结论:

  • 病毒基因组组成在SLiM模仿的范围和性质中起着至关重要的作用.
  • 了解这些病毒与宿主SLiM的相互作用是破译病毒劫持策略的关键.
  • 通过利用病毒模拟机制,研究结果可能有助于开发针对性的抗病毒疗法.