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Structural polypeptides of type 12 human adenovirus
The Journal of General Virology
|October 1, 1982
Summary
Similarities in trypsin sensitivity helped identify adenovirus 12 (Ad12) capsid proteins. A key polypeptide, identified as Ad12 IIIa, is the major structural phosphoprotein, mirroring findings in adenovirus 5 (Ad5).
Area of Science:
- Virology
- Molecular Biology
- Protein Chemistry
Background:
- Adenoviruses (Ad) are common human pathogens.
- Understanding Ad capsid structure is crucial for vaccine and antiviral development.
- Adenovirus type 5 (Ad5) and type 12 (Ad12) are distinct but share some structural similarities.
Purpose of the Study:
- To identify specific capsid polypeptides of adenovirus type 12 (Ad12).
- To characterize the structural and functional properties of Ad12 capsid proteins.
- To compare the phosphoprotein component of Ad12 with that of Ad5.
Main Methods:
- Comparative analysis of polypeptide trypsin sensitivity between Ad5 and Ad12.
- Peptide mapping techniques to identify and characterize viral proteins.
- Biochemical assays to determine protein phosphorylation status.
Main Results:
- Trypsin sensitivity patterns revealed conserved polypeptides between Ad5 and Ad12.
- One Ad12 polypeptide, initially presumed to be IIIa, was identified.
- This identified polypeptide was confirmed as the major structural phosphoprotein in Ad12, analogous to Ad5.
Conclusions:
- The trypsin sensitivity of viral polypeptides is a reliable method for identifying Ad12 capsid proteins.
- The major structural phosphoprotein in Ad12 is homologous to that of Ad5.
- This finding contributes to a deeper understanding of adenovirus structural protein conservation and function.