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Related Experiment Videos

RNA export: insights from viral models.

M E Harris1, T J Hope

  • 1Infectious Disease Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA.

Essays in Biochemistry
|December 11, 2002
PubMed
Summary
This summary is machine-generated.

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Retroviruses export intron-containing RNA using different mechanisms. Some use the Rev protein and CRM1, while others, like type-D retroviruses, utilize the CTE and TAP for export via the mRNA pathway.

Area of Science:

  • Molecular Biology
  • Virology
  • RNA Biology

Background:

  • Retroviruses are RNA viruses that replicate through a DNA intermediate.
  • Efficient export of viral RNA from the nucleus is crucial for retroviral replication.
  • Different retroviral subtypes have evolved distinct strategies for RNA export.

Purpose of the Study:

  • To elucidate the mechanisms of intron-containing RNA export in various retroviruses.
  • To investigate the roles of viral proteins and cellular factors in RNA export pathways.
  • To understand the function of RNA elements in intronless viral transcripts.

Main Methods:

  • Comparative analysis of retroviral RNA export pathways.
  • Identification and characterization of viral proteins (e.g., Rev) and their interactions with cellular factors (e.g., CRM1, TAP).

Related Experiment Videos

  • Study of RNA elements within viral transcripts.

    • Main Results:

    • Complex retroviruses employ the Rev protein and CRM1 for nuclear export of intron-containing RNA via the U snRNA pathway.
    • Type-D retroviruses utilize a CTE that binds cellular TAP to export intron-containing RNA through the mRNA pathway.
    • Intronless viral transcripts possess post-transcriptional elements potentially involved in export or 3'-end processing.

    Conclusions:

    • Retroviral RNA export is diverse, involving distinct viral proteins and cellular pathways.
    • The CTE-TAP interaction provides an alternative route for intron-containing RNA export.
    • Further research is needed to fully understand the function of RNA elements in intronless viral transcripts.