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Los sustratos del sistema de secreción tipo VI se transfieren y reutilizan entre las células hermanas
Andrea Vettiger1, Marek Basler1
1Focal Area Infection Biology, Biozentrum, University of Basel, Basel, Switzerland.
Cell
|September 13, 2016
Resumen
El sistema de secreción bacteriana de tipo VI (T6SS)
Área de la Ciencia:
- Microbiología
- Biología molecular
- Patogénesis bacteriana
Sus antecedentes:
- El sistema de secreción bacteriana de tipo VI (T6SS) es una nanomaquina compleja.
- T6SS funciona como un arma de lanza, inyectando proteínas efectoras en las células objetivo.
Objetivo del estudio:
- Investigar el papel de la punta T6SS y la proteína Hcp en el ensamblaje y la función de la vaina.
- Explorar la dinámica del intercambio de componentes T6SS entre las células bacterianas.
- Comprender cómo T6SS media las interacciones y la cooperación interbacterianas.
Principales métodos:
- Microscopía y manipulación genética para estudiar el ensamblaje y la función de T6SS.
- Ensayos de interacción de proteínas para analizar el intercambio de punta y Hcp.
- Experimentos de cocultivo para evaluar la complementación y la competencia interbacteriana.
Principales resultados:
- La composición de la punta y la cantidad regulan el montaje y la longitud de la funda T6SS.
- La disponibilidad de Hcp (proteína co-regulada por la hemolisina) influye en la longitud de la vaina.
- T6SS facilita el intercambio rápido de proteínas tip y Hcp entre las células en contacto.
- Las proteínas translocadas se reutilizan, lo que sugiere la entrega citosólica y el potencial de cooperación entre cepas.
Conclusiones:
- Tip y Hcp son componentes dinámicos cruciales para el ensamblaje y la función de T6SS.
- El intercambio interbacteriano de componentes T6SS permite la complementariedad y la cooperación funcionales.
- La transferencia de proteínas mediada por T6SS puede mejorar la supervivencia bacteriana y la aptitud competitiva.
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