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Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
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Membrane-Associated Flavivirus Replication Complex-Its Organization and Regulation.

Eiji Morita1, Youichi Suzuki2

  • 1Department of Biochemistry and Molecular Biology, Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki-shi 036-8561, Japan.

Viruses
|July 2, 2021
PubMed
Summary

Flaviviruses rearrange host cell membranes to form replication organelles, crucial for viral RNA amplification and assembly. Cellular factors regulate these essential structures, impacting flavivirus infection outcomes.

Keywords:
cellular factorsendoplasmic reticulumflavivirusinterferon-stimulated genesmembranous microenvironmentreplication complexreplication organelle

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Area of Science:

  • Virology
  • Cell Biology
  • Molecular Biology

Background:

  • Flaviviruses are arthropod-borne viruses causing severe human diseases.
  • Flavivirus infection triggers intracellular membrane rearrangements.
  • Replication organelles are key microenvironments for flavivirus replication.

Purpose of the Study:

  • To review the formation and function of flaviviral replication organelles.
  • To summarize the regulation of these organelles by cellular factors.

Main Methods:

  • Literature review of flavivirus replication studies.
  • Analysis of cellular mechanisms influencing organelle formation.
  • Examination of viral and host factor interactions.

Main Results:

  • Replication organelles coordinate viral RNA amplification, protein translation, and virion assembly.
  • These organelles shield the viral replication complex from host immune responses.
  • Cellular factors play a critical role in regulating organelle biogenesis and function.

Conclusions:

  • Understanding replication organelle regulation is vital for combating flavivirus infections.
  • Targeting cellular factors involved in organelle formation may offer therapeutic strategies.