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The Ap viridae family comprises marine dsDNA viruses infecting Poseidoniales archaea. These viruses, identified via metagenomics, share characteristics with Caudoviricetes, including replication and capsid formation modules.

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Area of Science:

  • Virology
  • Marine Microbiology
  • Archaea

Background:

  • The Apasviridae family consists of double-stranded DNA (dsDNA) viruses.
  • These viruses are associated with the marine archaeal lineage Poseidoniales.
  • They are related to other 'magroviruses' that infect Poseidoniales archaea.

Purpose of the Study:

  • To summarize the International Committee on Taxonomy of Viruses (ICTV) report on the family Apasviridae.
  • To detail the taxonomic classification and characteristics of Apasviridae.
  • To provide an overview of newly identified marine dsDNA viruses.

Main Methods:

  • Metagenomic analyses of brackish estuarine samples were employed for virus identification.
  • Bioinformatic approaches were used to analyze viral genomes and classify viruses.
  • The ICTV's taxonomic framework was utilized for family description.

Main Results:

  • The family Apasviridae was established within the order Magrovirales.
  • The genus Agnivirus and species Agnivirus brisbanense were defined.
  • Viruses possess a linear dsDNA genome (~108 kbp) encoding replication and morphogenesis modules.

Conclusions:

  • Apasviridae represents a distinct family of dsDNA viruses infecting marine archaea.
  • The identified viruses exhibit features characteristic of the class Caudoviricetes.
  • This classification aids in understanding viral diversity within marine archaeal ecosystems.