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Herpes simplex virus replicative concatemers contain L components in inverted orientation
1Centre de Génétique Moléculaire et Cellulaire, UMR 106-CNRS, Université Claude Bernard Lyon I, Villeurbanne, France.
Virology
|September 1, 1994
Summary
Herpes simplex virus (HSV-1) replication involves large DNA structures. Inversions of viral DNA components occur frequently during replication, possibly explained by rolling circle models.
Area of Science:
- Virology
- Molecular Biology
- Genetics
Background:
- Herpes simplex virus type 1 (HSV-1) is a significant human pathogen.
- Understanding HSV-1 DNA replication is crucial for developing antiviral strategies.
Purpose of the Study:
- To investigate the structure of HSV-1 replicative DNA.
- To elucidate the mechanisms generating structural variations in HSV-1 genomes during replication.
Main Methods:
- Pulse-field gel electrophoresis for separating large DNA fragments.
- Restriction enzyme digestion (SpeI and AseI) for analyzing DNA structure.
- Analysis of high molecular weight replicative intermediates.
Main Results:
- Accumulation of high molecular weight HSV-1 DNA was observed postinfection.
- Replicative intermediates are concatemeric, containing adjacent genomes with L components in various orientations.
- Frequent inversions of L components were detected, suggesting efficient generation mechanisms.
Conclusions:
- HSV-1 DNA replication produces concatemeric intermediates with frequent L component inversions.
- These findings support rolling circle replication models for HSV-1 genomes.
- Efficient mechanisms likely generate L component inversions during viral replication.