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ICTV Virus Taxonomy Profile: Plasmaviridae.

Mart Krupovic1, Ictv Report Consortium

  • 1Department of Microbiology, Institut Pasteur, 25, rue du Dr. Roux, 75015 Paris, France.

The Journal of General Virology
|April 4, 2018
PubMed
Summary

The Plasmaviridae family comprises enveloped viruses infecting wall-less bacteria like Acholeplasma. These viruses release without lysis, with Acholeplasma virus L2 being the sole classified member.

Keywords:
Acholeplasma virus L2ICTV ReportPlasmaviridaetaxonomy

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Area of Science:

  • Virology
  • Bacteriology
  • Microbiology

Background:

  • The Plasmaviridae family consists of enveloped viruses with pleomorphic virions (50-125 nm).
  • These viruses possess infectious, circular, supercoiled dsDNA genomes of approximately 12 kbp.
  • Plasmaviruses specifically infect Acholeplasma species, which are wall-less bacteria belonging to the Mollicutes class.

Purpose of the Study:

  • To summarize the International Committee on Taxonomy of Viruses (ICTV) report on Plasmaviridae taxonomy.
  • To provide an overview of the characteristics and classification of viruses within the Plasmaviridae family.

Main Methods:

  • Review and summarization of the official ICTV report on Plasmaviridae.
  • Analysis of viral morphology, genome structure, host range, and replication strategy.

Main Results:

  • Plasmaviruses are characterized by enveloped, pleomorphic virions containing dsDNA.
  • Infection targets wall-less Acholeplasma species, with viral release occurring via budding without host cell lysis.
  • Acholeplasma virus L2 is the only currently classified plasmavirus, though related prophages integrated into Acholeplasma genomes exist.

Conclusions:

  • The Plasmaviridae family represents a unique group of bacterial viruses with distinct replication mechanisms.
  • Further research into related prophages can enhance understanding of plasmavirus diversity and evolution.
  • The ICTV report provides a standardized classification for Plasmaviridae, crucial for virological research.