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Los bacteriófagos se benefician de la movilización de las islas de patogenicidad que codifican los sistemas
Alfred Fillol-Salom1, Jakob T Rostøl1, Adaeze D Ojiogu2
1MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London SW7 2AZ, UK.
Cell
|August 19, 2022
Resumen
Las islas cromosómicas inducibles por fagos (PICI) llevan diversos sistemas antifágicos. Los fagos ayudantes movilizan estos sistemas, proporcionando una amplia inmunidad contra los fagos y otros elementos móviles, dando forma a la evolución bacteriana.
Área de la Ciencia:
- Bacteriología
- Ecología microbiana
- La genética
Sus antecedentes:
- Las bacterias poseen diversos sistemas móviles de defensa antifágicos, pero su variabilidad y mecanismos de movilidad son poco conocidos.
- Las islas cromosómicas inducibles por fagos (PICI) son elementos genéticos móviles conocidos por interactuar con los fagos.
Objetivo del estudio:
- Investigar el papel de los PICI en la defensa bacteriana y la transferencia horizontal de genes.
- Aclarar los mecanismos por los que se movilizan y propagan los PICI y sus sistemas de defensa.
Principales métodos:
- Análisis de los sistemas de defensa codificados por PICI.
- Investigar el papel de los fagos auxiliares en la diseminación de PICI.
- Evaluación de la inmunidad conferida por los sistemas PICI contra diversos elementos genéticos móviles.
Principales resultados:
- Los PICI albergan una amplia gama de mecanismos de defensa contra los fagos.
- Los fagos ayudantes pueden diseminar sistemas de defensa codificados por PICI dentro y entre géneros bacterianos.
- Estos sistemas confieren una amplia inmunidad, inhibiendo no solo la replicación de fagos sino también la transferencia de plásmidos y PICI no congénitos.
- Los fagos movilizan los sistemas PICI para competir con otros elementos genéticos móviles.
Conclusiones:
- Los PICI son mediadores clave de la defensa antifago bacteriana y de la transferencia horizontal de genes.
- Los fagos y los PICI participan en interacciones mutualistas, impulsando la dinámica y la evolución de la comunidad bacteriana.
- La movilización de los PICI por los fagos ofrece beneficios a los fagos, los PICI y las bacterias, influyendo en los ecosistemas microbianos.
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