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Mutants of polyomavirus middle-T antigen
1Integrated Genetics, Framingham, MA 01701.
Biochimica Et Biophysica Acta
|November 25, 1987
Summary
Polyomavirus middle-T antigen mutants were classified by molecular position, revealing three domains crucial for cell transformation. This classification aids understanding of how middle-T antigen induces cellular changes and interacts with key enzymes.
Area of Science:
- Molecular Biology
- Virology
- Biochemistry
Background:
- Polyomavirus middle-T antigen is a potent oncogene that transforms cells in culture.
- It interacts with and modulates critical cellular enzymes like pp60c-src, protein kinase C, and phosphatidylinositol kinase.
- Previous classifications of middle-T antigen mutants were phenotypic.
Purpose of the Study:
- To compile and review reported mutants of polyomavirus middle-T antigen.
- To classify these mutants based on their molecular position.
- To present a model for middle-T antigen-induced cell transformation.
Main Methods:
- Review and compilation of existing literature on polyomavirus middle-T antigen mutants.
- Classification of mutants based on their position within the middle-T antigen molecule.
- Analysis of biochemical and biological properties related to cell transformation.
Main Results:
- A new classification system for middle-T antigen mutants based on molecular position is presented.
- The molecule is modeled into three functional domains: hydrophobic, pp60c-src-binding, and modulatory.
- This structural classification correlates with biochemical and biological transformation properties.
Conclusions:
- The classification of middle-T antigen mutants by molecular position provides a framework for understanding their function.
- A three-domain model (hydrophobic, pp60c-src-binding, modulatory) is proposed for middle-T antigen.
- This model aids in elucidating the mechanism of polyomavirus-induced cell transformation.