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相关概念视频

Viruses with RNA Genomes01:29

Viruses with RNA Genomes

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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...
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Retroviruses02:33

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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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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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Size and Structure of Viral Genomes01:26

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Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
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Bacteriophages, or phages, are viruses that specifically infect bacteria. Among them, T-even bacteriophages, such as T4, exhibit a well-characterized lytic replication cycle in Escherichia coli (E. coli). This process ensures the rapid proliferation of the virus while ultimately leading to the destruction of the bacterial host.Attachment and DNA InjectionThe infection process begins with the recognition and binding of the T4 phage to the E. coli cell surface. Tail fibers of the phage...
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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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Visualization of SARS-CoV-2 using Immuno RNA-Fluorescence In Situ Hybridization
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人类冠状病毒-229E劫持了关键的宿主细胞RNA处理综合体,用于复制.

Snigdha Sarkar1, Song Feng1, Hugh D Mitchell1

  • 1Biological Sciences Division, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States.

Journal of proteome research
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概括
此摘要是机器生成的。

人类冠状病毒-229E (HCoV-229E) 感染改变了宿主细胞蛋白质结构,劫持了用于复制的RNA处理. 针对特定的蛋白质复合体可以降低病毒载量,提供潜在的广泛抗病毒疗法.

关键词:
冠状病毒冠状病毒病毒主机关闭 的主机关闭主体-病原体相互作用有限的蛋白质溶解.结构蛋白质组学 结构蛋白质组学

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科学领域:

  • 病毒学 病毒学
  • 结构生物学 结构生物学
  • 系统生物学 系统生物学

背景情况:

  • 动物传播的冠状病毒爆发需要了解病毒与宿主之间的相互作用,以便抗病毒开发.
  • 传统的蛋白质组学 (测量蛋白质丰度) 错过了关键的功能性改变.
  • 蛋白质的结构变化为改变的调节通路提供了更好的洞察力.

研究的目的:

  • 使用结构蛋白质学研究感染人类冠状病毒-229E (HCoV-229E) 的人类肺细胞的分子景观.
  • 确定针对HCoV-229E.的抗病毒疗法的宿主细胞点.

主要方法:

  • 基于蛋白质分解的有限质谱法 (LiP-MS) 用于捕捉蛋白质构造变化.
  • 人类肺细胞感染了HCoV-229E,并使用LiP-MS.进行了分析.
  • 结构数据证实了在感染后观察到的细胞组合的变化.

主要成果:

  • HCoV-229E劫持了关键的RNA处理途径和组件,用于复制和主机关闭.
  • 在HCoV-229E感染后发现了特定的蛋白质构造变化.
  • 调节Nop56-关联的前rRNA复合体和拼接体C复合体减弱的HCoV-229E复制.

结论:

  • HCoV-229E采用了一种涉及复制RNA处理途径的多方策略.
  • 与Nop56相关的pre-rRNA复合体和结合体C复合体是可行的宿主细胞治疗标.
  • 针对这些复杂物可能会对冠状病毒感染产生广泛的疗效.