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Genetic analysis of J-virus and Beilong virus using minireplicons

Danielle E Magoffin1, John S Mackenzie, Lin-Fa Wang

  • 1CSIRO Livestock Industries, CSIRO Australian Animal Health Laboratory, PO Bag 24, Geelong, Victoria 3220, Australia.

Virology
|April 3, 2007
PubMed

Insights

J-virus (JPV) and Beilong virus (BeiPV) are closely related paramyxoviruses. Minireplicon studies support their classification into a new genus, distinct from Nipah virus.

Area of Science:

  • Virology
  • Molecular Biology
  • Taxonomy

Background:

  • J-virus (JPV) and Beilong virus (BeiPV) are novel paramyxoviruses with large genomes (>19 kb) and multiple transcriptional units.
  • These viruses were isolated from Australian wild mice (JPV) and Chinese human/rat mesangial cells (BeiPV).

Purpose of the Study:

  • To assess the taxonomic status of JPV and BeiPV using minireplicon systems.
  • To investigate the relationship between JPV, BeiPV, and other paramyxoviruses like Nipah virus.

Main Methods:

  • Utilized minireplicon systems to study viral genome replication.
  • Performed interchangeable genome replication machinery experiments between JPV, BeiPV, and Nipah virus.

Main Results:

  • JPV and BeiPV genome replication machineries are interchangeable, indicating close genetic relatedness.
  • These machineries were not functional when exchanged with Nipah virus, suggesting distinct taxonomic classification.
  • Demonstrated that these large-genome viruses adhere to the 'rule of six'.
  • Over-expression of the C protein negatively impacts minigenome replication.

Conclusions:

  • JPV and BeiPV are closely related and warrant classification into a separate genus within paramyxoviruses.
  • The findings support a distinct taxonomic position for JPV and BeiPV, separate from the Nipah virus lineage.
  • The study confirms adherence to the 'rule of six' and highlights the impact of C protein expression on replication.

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