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Las proteínas de los prófagos alteran el ARN no codificante largo y el ADN de los espermatozoides en desarrollo para
Rupinder Kaur1,2,3, Angelina McGarry1,2, J Dylan Shropshire3,4
1Pennsylvania State University, Departments of Biology and Entomology, University Park, PA 16802, USA.
Science (New York, N.Y.)
|March 7, 2024
Resumen
Las proteínas de los prófagos CifA y CifB de Wolbachia alteran el ARN y el ADN no codificantes largos en el esperma de Drosophila, causando letalidad embrionaria a través de la incompatibilidad citoplasmática (CI). Esto revela un mecanismo clave de simbiosis que afecta la evolución de los insectos y el control de los vectores.
Área de la Ciencia:
- Biología molecular
- La genética
- Biología evolutiva
Sus antecedentes:
- La interacción de las proteínas profágicas con las macromoléculas eucariotas es poco conocida.
- Los endosimbiontes de Wolbachia influyen en la reproducción del huésped a través de mecanismos como la incompatibilidad citoplasmática (CI).
Objetivo del estudio:
- Investigar los mecanismos moleculares mediante los cuales las proteínas profágicas de Wolbachia CifA y CifB afectan el desarrollo de esperma de Drosophila y establecer la IC.
- Aclarar las funciones de CifA y CifB en la alteración del ARN no codificante largo (ARNlnc) y el ADN durante la espermiogénesis.
Principales métodos:
- Análisis de las funciones de las proteínas CifA y CifB como ribonucleasa (RNasa) y desoxirribonucleasa (DNasa).
- Investigar el impacto de CifA y CifB en los niveles de lncRNA y la integridad del ADN en el esperma de Drosophila.
- Utilizando el knockdown de lncRNA y la mutagénesis para vincular los cambios moleculares con CI.
Principales resultados:
- CifA (RNasa) agota un lncRNA clave de los espermatozoides que es esencial para la transición de histona a protamina.
- CifA y CifB (DNases) inducen daño al ADN durante la espermiogénesis tardía.
- El agotamiento del lncRNA exacerba la CI, y las alteraciones moleculares se correlacionan con el daño del ADN embrionario.
Conclusiones:
- Las proteínas de los prófagos CifA y CifB interactúan directamente con las macromoléculas eucariotas (ARNlnc y ADN) durante la gametogénesis.
- Estas interacciones son cruciales para establecer la incompatibilidad citoplasmática, una simbiosis fundamental para la evolución de los insectos.
- La comprensión de estos mecanismos tiene implicaciones para las estrategias de control de insectos vectores.
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