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SRV2, un gen requerido para la activación RAS de la adenilato ciclasa en levaduras
M Fedor-Chaiken1, R J Deschenes, J R Broach
1Department of Biology, Princeton University, New Jersey 08544.
Cell
|April 20, 1990
Resumen
El gen SRV2 es crucial para la actividad de la adenilato ciclasa activada por RAS y las funciones celulares esenciales. Las mutaciones en SRV2 alivian la sensibilidad al estrés, pero conducen a la letalidad cuando el gen está ausente.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Biología celular Biología celular.
- Genética La genética.
Sus antecedentes:
- La vía del gen RAS regula las respuestas celulares al estrés.
- La actividad de la adenilato ciclasa es crítica para la señalización celular.
- Comprender los genes que modulan la función RAS es importante para la biología celular.
Objetivo del estudio:
- Para identificar genes que interactúan con el RAS. activado.
- Para aclarar el papel del gen SRV2 en la respuesta al estrés celular y la acumulación de cAMP.
- Para caracterizar la función de la proteína SRV2.
Principales métodos:
- Cribado genético para los supresores de las RAS activadas.
- Análisis de epistasis para determinar las interacciones genéticas.
- Medición directa de la acumulación de AMP cíclica (cAMP) in vivo.
- Secuenciación de genes para identificar la función de las proteínas.
- Análisis de mutaciones nulas y supresores genéticos.
Principales resultados:
- Las mutaciones del gen SRV2 suprimen la sensibilidad al estrés en las cepas activadas de RAS.
- El SRV2 afecta a la acumulación de AMP cíclico celular (cAMP).
- Las mutaciones del SRV2 disminuyen la producción de cAMP in vivo tras la activación del RAS.
- Las mutaciones nulas en SRV2 son letales y no se suprimen mediante la activación de la proteína quinasa dependiente de la cAMP.
- SRV2 codifica una proteína asociada a la adenilato ciclasa.
Conclusiones:
- La proteína SRV2 es esencial para la función de la adenilato ciclasa activada por RAS.
- SRV2 juega un papel vital en la regulación de los niveles de cAMP.
- La proteína SRV2 está involucrada en procesos celulares esenciales más allá de la señalización RAS.
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