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La señalización sin alas en las sinapsis es a través de la escisión y la importación nuclear del receptor DFrizzled22
Dennis Mathew1, Bulent Ataman, Jinyun Chen
1Department of Neurobiology, University of Massachusetts Medical School, Worcester, MA 01605, USA.
Science (New York, N.Y.)
|November 29, 2005
Resumen
La señalización sin alas en las sinapsis de Drosophila involucra al receptor DFrizzled2. Este receptor y este receptor.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Biología del desarrollo Biología del desarrollo.
- Biología Molecular Biología Molecular
Sus antecedentes:
- La señalización sin alas (Wg) es crucial para el desarrollo y la activación génica.
- En las sinapsis de Drosophila, Wg regula el crecimiento y la diferenciación.
- Los eventos posteriores de la unión de Wg al receptor DFrizzled2 (DFz2) en las sinapsis no están claros.
Objetivo del estudio:
- Para dilucidar los mecanismos moleculares de la transducción de señales sin alas en las sinapsis de Drosophila.
- Para investigar el destino y la función del receptor DFrizzled2 después de la unión Wingless.
Principales métodos:
- Inmunohistoquímica e imágenes en vivo para rastrear la localización de DFrizzled2.
- Pruebas bioquímicas para analizar la escisión de DFrizzled2 y la translocación nuclear.
- Manipulación genética para evaluar el papel de la señalización Wingless en el tráfico de DFrizzled2.
Principales resultados:
- DFrizzled2 es endocitado desde la membrana postsináptica y se mueve hacia el núcleo.
- La porción C-terminal de DFrizzled2 (DFz2-C) es escindida y translocada en el núcleo.
- La translocación nuclear de DFz2-C, pero no su escisión, depende de la señalización de Wingless.
Conclusiones:
- La transducción de la señal sin alas en las sinapsis implica la importación nuclear del extremo C de DFrizzled2.
- El DFrizzled2-C nuclear puede desempeñar un papel en la regulación de la transcripción génica para el desarrollo de las sinapsis.
- Este estudio revela una nueva vía para la señalización de Wingless a través de la translocación del receptor.
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