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Interactions among the three adenovirus core proteins
Journal of Virology
|August 1, 1985
Summary
Adenovirus core protein interactions were mapped using chemical cross-linking. Polypeptides V, VII, and mu form specific dimers and trimers, with V interacting with VI, revealing key adenovirus structural insights.
Area of Science:
- Molecular Biology
- Virology
- Structural Biology
Background:
- Adenovirus core proteins V, VII, and mu are essential for viral DNA packaging and capsid structure.
- Understanding the precise interactions between these core proteins is crucial for elucidating the adenovirus assembly and infection mechanisms.
Purpose of the Study:
- To investigate and characterize the direct interactions among adenovirus core polypeptides V, VII, and mu.
- To identify specific cross-linked species and map the interaction interfaces within the adenovirus core.
Main Methods:
- Utilized the reversible chemical cross-linker dithiobis(succinimidyl propionate) (DSP).
- Employed two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) for separation and identification of cross-linked products.
- Confirmed interactions using the arginine-specific cross-linker p-azidophenyl glyoxal.
Main Results:
- Detected efficient cross-linking between V and VII, V and mu, and a V-VII-mu trimer.
- Identified homodimers of polypeptides V and VII.
- Observed a significant interaction between polypeptide V and a dimer of polypeptide VI, suggesting a major core-capsid linkage.
Conclusions:
- Adenovirus core proteins V, VII, and mu engage in specific homo- and hetero-oligomeric interactions.
- Polypeptide V plays a central role in mediating interactions within the core and with the capsid component VI.
- These findings provide a detailed molecular map of adenovirus core protein interactions, contributing to the understanding of viral structure and assembly.