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Purification and Visualization of Influenza A Viral Ribonucleoprotein Complexes
Published on: February 9, 2009
Antigenic structure of transmissible gastroenteritis virus nucleoprotein
J M Martín Alonso1, M Balbín, D J Garwes
1Departamento de Biología Funcional (Area de Bioquímica y Biología Molecular), Facultad de Medicina, Universidad de Oviedo, Spain.
Virology
|May 1, 1992
Summary
Researchers mapped antigenic sites on the transmissible gastroenteritis virus (TGEV) nucleoprotein (N) using monoclonal antibodies. They identified key regions and conformational epitopes, aiding in understanding TGEV antigenicity.
Area of Science:
- Virology
- Immunology
- Molecular Biology
Background:
- Transmissible gastroenteritis virus (TGEV) is a significant swine pathogen.
- The nucleoprotein (N) is a key component of TGEV, involved in viral structure and replication.
- Understanding the antigenic structure of TGEV N is crucial for vaccine development and diagnostics.
Purpose of the Study:
- To delineate the antigenic domains and epitopes of the TGEV nucleoprotein (N).
- To characterize the binding sites of monoclonal antibodies (MAbs) against TGEV N.
- To investigate the role of conformational epitopes in MAb binding.
Main Methods:
- Generation and characterization of 11 MAbs against TGEV.
- Cloning of TGEV N-coding DNA fragments into expression plasmids.
- Analysis of fusion protein antigenicity using immunoblotting and Western blot techniques.
Main Results:
- Identification of a major antigenic domain (residues 1-241) and a specific epitope (residues 57-117) on TGEV N.
- Characterization of a second antigenic domain (residues 175-360) with a subsite (residues 241-349).
- Mapping of a linear epitope (residues 360-382) recognized by MAb DA3.
- Evidence for conformational dependence in MAb binding sites.
Conclusions:
- The study successfully mapped antigenic structures on the TGEV nucleoprotein.
- Fusion proteins expressed from cloned DNA fragments are effective tools for epitope mapping.
- The findings contribute to a better understanding of TGEV antigenicity and potential diagnostic/vaccine targets.
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