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Related Concept Videos

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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Directing Proteins to the Rough Endoplasmic Reticulum01:34

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The organelle-specific signaling sequences direct proteins synthesized in the cytosol to their final destination like ER, mitochondria, peroxisomes, etc. Some of the proteins directed to ER are then trafficked via vesicles to other organelles within the cell or the extracellular environment through the Golgi complex. For example, the rough ER synthesizes soluble proteins for transportation to the lysosomes or secretion out of the cell. It can also synthesize transmembrane proteins that can...
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Size and Structure of Viral Genomes01:26

Size and Structure of Viral Genomes

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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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The Replisome03:01

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DNA replication is carried out by a large complex of proteins that act in a coordinated matter to achieve high-fidelity DNA replication. Together this complex is known as the DNA replication machinery or the replisome.
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Viral Replication: Lytic Cycle01:20

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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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Generation and Assembly of Virus-Specific Nucleocapsids of the Respiratory Syncytial Virus
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Generation and Assembly of Virus-Specific Nucleocapsids of the Respiratory Syncytial Virus

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Does form meet function in the coronavirus replicative organelle?

Benjamin W Neuman1, Megan M Angelini2, Michael J Buchmeier3

  • 1School of Biological Sciences, University of Reading, Reading, Berkshire, UK.

Trends in Microbiology
|July 20, 2014
PubMed
Summary
This summary is machine-generated.

Coronaviruses create complex replication organelles for viral reproduction. This review explores how these structures, essential for positive-sense RNA viruses, are built and function.

Keywords:
RNA virus replicationmembrane rearrangementreplicative organellevirus factory

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Area of Science:

  • Virology
  • Molecular Biology
  • Cell Biology

Background:

  • Viruses utilize specialized cellular components for replication.
  • Coronaviruses possess exceptionally large RNA genomes and complex replication strategies.
  • Understanding viral replication factories is key to antiviral development.

Purpose of the Study:

  • To provide a virus-centric review of the coronavirus replication-transcription complex.
  • To contextualize coronavirus replication organelles within the broader landscape of positive-sense RNA viruses.
  • To elucidate the protein expression and functional mechanisms driving viral factories.

Main Methods:

  • Literature review of recent studies on coronavirus replication.
  • Comparative analysis of replication organelles across positive-sense RNA viruses.
  • Examination of viral protein synthesis and function in replication.

Main Results:

  • Coronavirus replication organelles are intricate structures essential for viral propagation.
  • Mechanisms of protein expression and function are critical for forming these viral factories.
  • These organelles concentrate metabolic and reproductive activities for the virus.

Conclusions:

  • The coronavirus replication-transcription complex is a highly organized viral factory.
  • Understanding these complex organelles offers insights into viral life cycles.
  • Further research into these factories can inform strategies against RNA viruses.