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Updated: Apr 30, 2026

Dissecting Host-virus Interaction in Lytic Replication of a Model Herpesvirus
Published on: October 7, 2011
Structure and function of the adenovirus origin of replication
Adenovirus DNA replication initiation relies on specific DNA sequences. A cellular protein binding to the origin enhances replication efficiency by protecting key DNA segments.
Area of Science:
- Molecular Biology
- Virology
- Genetics
Background:
- Adenovirus DNA replication is a complex process.
- Efficient initiation requires specific DNA sequences at the viral origin of replication.
Purpose of the Study:
- To identify and characterize the functional regions of the adenovirus origin of replication.
- To investigate the role of cellular proteins in enhancing adenovirus DNA replication initiation.
Main Methods:
- Deletion and base substitution mutagenesis of the adenovirus 2 genome terminus.
- DNAase I protection assays to identify protein binding sites.
- Analysis of initiation efficiency using plasmid constructs.
Main Results:
- The adenovirus origin of replication comprises two distinct functional regions.
- The first 18 base pairs (bp) support limited initiation.
- A region between nucleotides 19 and 67 significantly enhances initiation efficiency.
- A cellular protein binds specifically to this region (KD = 2 X 10(-11) M).
- Bound protein protects DNA between bp 19 and 43 from DNAase I digestion.
Conclusions:
- The cellular protein binding site within the adenovirus origin is crucial for efficient initiation.
- This cellular factor plays a significant role in regulating viral DNA replication.
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