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Identification of Post-translational Modifications of Plant Protein Complexes
Published on: February 22, 2014
Resistencia a las enfermedades mediada por la proteína SNARE en la pared celular vegetal
Nicholas C Collins1, Hans Thordal-Christensen, Volker Lipka
1Sainsbury Laboratory John Innes Centre, Norwich, Norfolk NR4 7UH, UK.
Nature
|October 31, 2003
Resumen
La inmunidad vegetal consiste en prevenir la penetración de las paredes celulares de los hongos. Los investigadores identificaron los genes PEN1 y ROR2, revelando un mecanismo molecular compartido (complejo SNARE) para la resistencia en la inmunidad de las plantas no hospedadoras y basales.
Área de la Ciencia:
- Patología vegetal patología vegetal.
- Biología molecular La biología molecular.
- Inmunidad vegetal La inmunidad vegetal.
Sus antecedentes:
- La penetración en la pared celular de las plantas por hongos patógenos es un mecanismo de defensa clave.
- Los mecanismos moleculares subyacentes a la resistencia a la penetración no hospedante y basal son poco conocidos.
Objetivo del estudio:
- Para identificar genes involucrados en la resistencia a la penetración de las plantas.
- Aclarar la base molecular de la resistencia no huésped y basal contra patógenos fúngicos.
Principales métodos:
- Desarrolló una pantalla para la penetración (pen) mutantes en Arabidopsis.
- Aislaron y caracterizaron el gen PEN1 en Arabidopsis y ROR2 en cebada.
- Investigó el papel de las sintaxinas y los complejos SNARE en la inmunidad vegetal.
Principales resultados:
- Identificó PEN1 en Arabidopsis y ROR2 en cebada, que son sintaxinas funcionalmente homólogas.
- Demostró un vínculo mecánico entre la resistencia a la penetración no hospedante y la resistencia a la penetración basal en todas las especies de plantas.
- Se demostró que la resistencia implica un complejo SNARE, incluido un homólogo de SNAP-25, y procesos mediados por vesículas en los sitios de penetración.
Conclusiones:
- La formación del complejo SNARE mediado por la sintaxina es crucial para la resistencia a la penetración en las plantas.
- Este mecanismo de resistencia es distinto de la resistencia específica de la raza conferida por los genes R.
- Los hallazgos destacan las vías moleculares conservadas en la defensa de las plantas contra los patógenos fúngicos.
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