Related Experiment Videos
Predicted structure of the adenovirus DNA binding protein
1Department of Microbiology, Faculty of Medicine, Université de Sherbrooke, Québec, Canada.
Abstract:
The DNA sequence of a portion of the MAV1 SmaI-D fragment coding for the C-terminal 147 amino acids of the adenoviral DNA-binding protein (DBP) has been determined. A multiple sequence alignment was constructed of the MAV1 fragment and the DBPs of Ad.2, 4, 5, 7, 12, 40, and 41 to examine the degree of conservation of features that have been mapped on the Ad.2 DBP and to identify further conserved features. The less conserved N-terminal segment of the protein contains two nuclear localization signals and two acidic regions, the host range region, and all of the 11 phosphorylation sites. The highly conserved C-terminal segment contains a potential leucine zipper and zinc finger motifs. These sequence features were mapped onto a predicted secondary structure of the Ad.2 DBP.
Insights
This study determined the DNA sequence of a portion of the MAV1 viral DNA-binding protein (DBP). Analysis revealed conserved C-terminal motifs and variable N-terminal regions, offering insights into viral protein function.
Area of Science:
- Molecular Biology
- Virology
- Bioinformatics
Background:
- Adenoviral DNA-binding protein (DBP) is crucial for viral DNA replication.
- Understanding DBP sequence conservation provides insights into viral evolution and function.
Purpose of the Study:
- To determine the DNA sequence of the MAV1 DBP C-terminal region.
- To compare MAV1 DBP with other adenoviral DBPs to identify conserved and variable regions.
- To map functional domains onto predicted protein structures.
Main Methods:
- DNA sequencing of the MAV1 SmaI-D fragment.
- Multiple sequence alignment of MAV1 DBP with homologous proteins from various adenovirus serotypes (Ad.2, 4, 5, 7, 12, 40, 41).
- Bioinformatic analysis to identify conserved motifs and functional regions.
Main Results:
- The C-terminal 147 amino acids of MAV1 DBP were sequenced.
- A high degree of conservation was observed in the C-terminal segment, including potential leucine zipper and zinc finger motifs.
- The N-terminal segment showed less conservation and contained nuclear localization signals, acidic regions, host range determinants, and phosphorylation sites.
Conclusions:
- The C-terminal region of adenoviral DBPs is highly conserved, suggesting critical roles in viral replication.
- Sequence variations in the N-terminal region may contribute to differences in host range and replication strategies among adenovirus serotypes.
- Mapping conserved features onto predicted secondary structures aids in understanding DBP structure-function relationships.