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Una cepa del virus del sarcoma de Fujinami que es sensible a la temperatura en la fosforilación de proteínas y la
Cell
|December 1, 1980
Resumen
La transformación del virus del sarcoma de Fujinami (FSV) está vinculada a una proteína sensible a la temperatura (P140). Esta proteína es la proteína
Área de la Ciencia:
- Oncología Oncología.
- Biología Molecular Biología Molecular
- Virología Virología.
Sus antecedentes:
- El virus del sarcoma de Fujinami (FSV) causa la transformación de las células.
- El FSV codifica una proteína de 140.000 de peso molecular (P140).
Objetivo del estudio:
- Para investigar el papel de P140 en la transformación celular inducida por FSV.
- Para determinar el mecanismo de la transformación sensible a la temperatura por FSV.
Principales métodos:
- Experimentos de cambio de temperatura (38°C frente a 41.5°C) en células infectadas por el FSV.
- Análisis de la fosforilación de la proteína P140 (residuos de serina y tirosina).
- Ensayos de la proteína quinasa del complejo inmunológico.
Principales resultados:
- Las células infectadas por FSV se transformaron a 38°C, pero fueron normales a 41.5°C.
- La fosforilación de P140 es dependiente de la temperatura, con un aumento de la fosforilación de la tirosina a 38°C.
- La fosforilación de tirosina de las proteínas celulares también es sensible a la temperatura en las células infectadas por FSV.
Conclusiones:
- P140 es la proteína transformadora del FSV.
- La fosforilación de proteínas en los residuos de tirosina es crítica para la transformación mediada por FSV.
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