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Spatial and Temporal Analysis of Active ERK in the C. elegans Germline
Published on: November 29, 2016
Se requiere una proteína transmembrana con una actividad cinasa relacionada con cdc2+/CDC28 para la señalización
1Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas 75235.
Cell
|August 27, 1993
Resumen
Los mutantes de levadura revelan el gen ERN1 del gen.
Área de la Ciencia:
- Biología celular Biología celular.
- Biología molecular La biología molecular.
- La bioquímica es la bioquímica.
Sus antecedentes:
- Las células eucariotas poseen una vía de señalización desde el retículo endoplasmático (ER) hasta el núcleo.
- Esta vía responde a la acumulación de proteínas desplegadas en el ER, una condición conocida como estrés del ER.
- Esta respuesta al estrés es crucial para la supervivencia celular.
Objetivo del estudio:
- Investigar los mecanismos moleculares subyacentes a la vía de respuesta al estrés ER-nucleo en la levadura.
- Identificar y caracterizar los genes involucrados en esta vía, centrándose específicamente en el gen ERN1.
- Para aclarar la función del producto del gen ERN1, Ern1p, en la detección y transducción de señales de estrés ER.
Principales métodos:
- Análisis genético de mutantes de levadura defectuosos en la vía de respuesta al estrés ER.
- Mapeo genético para identificar el locus ERN1.
- Caracterización molecular del gen ERN1 y su proteína codificada, Ern1p.
- Ensayos bioquímicos para determinar la actividad de la proteína quinasa de Ern1p.
Principales resultados:
- Se identificaron varios mutantes de levadura defectuosos en la vía de respuesta al estrés ER.
- Estos mutantes se asignaron al gen ERN1.
- ERN1 codifica una proteína transmembrana (Ern1p) con un dominio de proteína quinasa en el citoplasma.
- Se propone que Ern1p sea el sensor proximal de los eventos de ER.
Conclusiones:
- El gen ERN1 juega un papel crítico en la protección de las células de levadura del estrés letal de ER.
- Ern1p funciona como un sensor transmembrana que transduce las señales a través de la membrana ER.
- La activación de Ern1p conduce a la activación de los factores de transcripción, aumentando la expresión de proteínas protectoras ER como BiP.
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