Adenovirus assembly: self-assembly of partially digested hexons.

Area of Science:

• Virology
• Structural Biology
• Biochemistry

Background:

• Adenovirus capsomers are essential for viral structure.
• Understanding hexon behavior is key to viral assembly insights.

Purpose of the Study:

• To investigate the effects of papainic hydrolysis on adenovirus type 2 hexon capsomers.
• To characterize the resulting oligomeric species and their properties.

Main Methods:

• Limited papainic hydrolysis of hexon capsomers.
• Sedimentation analysis to determine oligomeric species.
• Assessment of immunological properties.

Main Results:

• Hydrolysis induced self-aggregation of hexons into preferred oligomeric species, specifically hexon trimers.
• These hexon trimers sedimented at approximately 19S.
• The trimers maintained their original immunological characteristics.
• Two classes of trimer molecules with distinct electric charges were identified.

Conclusions:

• Papainic hydrolysis leads to the formation of stable hexon trimers from adenovirus type 2 capsomers.
• The observed trimer aggregation phenomenon may be relevant to the in vivo assembly process of adenoviruses.
• Hexon trimers represent a significant oligomeric state in adenovirus assembly.