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Related Experiment Videos

A reverse genetics system for Borna disease virus.

Mar Perez1, Ana Sanchez1, Beatrice Cubitt1

  • 1The Scripps Research Institute, Department of Neuropharmacology IMM-6, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.

The Journal of General Virology
|October 24, 2003
PubMed
Summary

Researchers established a reverse genetics system for Borna disease virus (BDV), enabling minigenome replication and expression. This system revealed critical roles for the nucleoprotein (N) and phosphoprotein (P) in BDV replication.

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Area of Science:

  • Virology
  • Molecular Biology
  • Genetics

Background:

  • Borna disease virus (BDV) is an enveloped, non-segmented, negative-stranded RNA virus.
  • It is the prototypic member of the Bornaviridae family, exhibiting unique genetic and biological characteristics.
  • Understanding BDV replication is crucial due to its distinct viral organization.

Purpose of the Study:

  • To establish a functional reverse genetics system for Borna disease virus (BDV).
  • To investigate the roles of key viral proteins in BDV RNA replication and gene expression.
  • To elucidate the genetic requirements for BDV minigenome replication and transcription.

Main Methods:

  • Development of a reverse genetics system using RNA polymerase I and II.
  • Construction of plasmids for BDV minigenome (MG) synthesis and expression of viral proteins (L, N, P).

Related Experiment Videos

  • Co-transfection experiments to assess MG replication and expression in the presence of viral proteins.

    • Main Results:

    • Successful intracellular synthesis and replication of a BDV minigenome (MG) were achieved.
    • Replication and expression were dependent on the ratio of nucleoprotein (N) to phosphoprotein (P).
    • Only the Np40 isoform of the nucleoprotein was essential for viral polymerase activity, and the p10 polypeptide inhibited MG expression.

    Conclusions:

    • A robust reverse genetics system for BDV has been established.
    • The N:P ratio is critical for efficient BDV replication, with Np40 being indispensable.
    • The p10 polypeptide acts as a negative regulator of BDV gene expression.