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Minimal cis-acting elements required for adenovirus genome packaging
Philomena Ostapchuk1, Patrick Hearing
1Department of Molecular Genetics and Microbiology, School of Medicine, Stony Brook University, New York 11794-5222, USA.
Journal of Virology
|April 15, 2003
Summary
Adenovirus genome packaging requires specific DNA sequences, but not terminal repeats or proteins. This finding simplifies gene therapy vector design by confirming that only the packaging domain is needed to target DNA to the viral capsid.
Area of Science:
- Molecular biology
- Virology
- Gene therapy
Background:
- Understanding virus assembly, particularly genome packaging into capsids, is crucial for developing antiviral drugs and virus-based therapies.
- Adenovirus packaging relies on specific DNA sequences (A repeats) and associated proteins (CCAAT displacement protein, protein IVa2).
Purpose of the Study:
- To investigate the necessity of adenovirus inverted terminal repeats and covalently linked terminal proteins in genome packaging.
- To clarify the essential cis-acting elements for adenovirus genome packaging.
Main Methods:
- An in vivo approach was used to assess the role of inverted terminal repeats and terminal proteins in adenovirus genome packaging.
Main Results:
- Adenovirus inverted terminal repeats and covalently linked terminal proteins are not essential for efficient viral genome packaging.
- The A repeats region is sufficient for targeting the viral genome to the capsid.
Conclusions:
- Adenovirus genome packaging is primarily dependent on the A repeats region, not the terminal elements.
- Gene therapy vectors can be designed by linking heterologous DNA to the adenovirus packaging domain, simplifying vector construction.