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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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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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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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DNA virus replication compartments.

Melanie Schmid1, Thomas Speiseder, Thomas Dobner

  • 1Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany.

Journal of Virology
|November 22, 2013
PubMed
Summary

Viruses create specialized compartments, known as virus factories, by recruiting cellular and viral factors. These compartments are crucial for viral replication and evading host antiviral defenses.

Area of Science:

  • Virology
  • Cell Biology

Background:

  • Viruses manipulate host cell machinery to establish replication sites.
  • These sites, termed viroplasms or virus factories, concentrate viral and cellular factors.

Purpose of the Study:

  • To review the characteristic features of viral replication compartments across different virus families.
  • To discuss the similarities in assembly and function of these virus-induced structures.

Main Methods:

  • Literature review of viral replication compartments.
  • Comparative analysis of viral and cellular activities associated with compartment formation.

Main Results:

  • Viral replication compartments are formed through molecular interactions between viral and cellular components.

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  • These compartments facilitate viral genome expression, replication, and virion assembly.
  • They also play a role in subverting cellular antiviral defense mechanisms.

    • Conclusions:

    • Viral replication compartments are essential virus-induced microenvironments.
    • Understanding these compartments provides insights into viral strategies and host-pathogen interactions.