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The herpes simplex virus type 1 reactivation function lies outside the latency-associated transcript open reading
M J Farrell1, J M Hill, T P Margolis
1Molecular Biology Institute, School of Medicine, University of California, Los Angeles 90024.
Journal of Virology
|June 1, 1993
Summary
Herpes simplex virus reactivation from latency does not require a specific protein function. Researchers altered a key gene in the virus, finding it still reactivated normally, suggesting this protein is not essential for the process.
Area of Science:
- Virology
- Molecular Biology
- Genetics
Background:
- Herpes simplex virus (HSV) establishes lifelong latency in neurons.
- Reactivation of HSV from latency is a complex process crucial for disease recurrence.
- The latency-associated transcription unit (LAT) is implicated in HSV reactivation.
Purpose of the Study:
- To investigate the role of the largest open reading frame (ORF) within the HSV latency-associated transcription unit (LAT) in viral reactivation.
- To determine if a protein product from this specific LAT ORF is essential for efficient HSV reactivation from latency.
Main Methods:
- Construction of a recombinant HSV with a modified largest ORF in the LAT region.
- In vivo assessment of the reactivation phenotype of the constructed recombinant virus compared to wild-type HSV.
Main Results:
- The recombinant virus with the altered largest LAT ORF exhibited a wild-type reactivation phenotype.
- This indicates that the protein function encoded by this specific ORF is not required for efficient HSV reactivation from latency.
Conclusions:
- The largest open reading frame within the herpes simplex virus latency-associated transcription unit is not essential for in vivo reactivation from latency.
- These findings challenge previous assumptions about the role of LAT-encoded proteins in HSV reactivation dynamics.