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Global Identification of Co-Translational Interaction Networks by Selective Ribosome Profiling

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Traducción local de las palabras. Comentario sobre "Principios de la translocación cotranslacional de ER revelados

David W Reid¹, Christopher V Nicchitta²

¹Program in Cardiovascular and Metabolic Disorders, Duke-NUS Graduate Medical School, Singapore 169857, Singapore.

Science (New York, N.Y.)

|June 13, 2015

Resumen

Los ribosomas que traducen el ARN mensajero del secretoma (ARNm) se mueven al retículo endoplasmático (ER) cuando emerge un péptido de señal y permanecen allí durante múltiples ciclos de traducción, volviendo al citosol solo después de completado.

Área de la Ciencia:

Biología Molecular Biología Molecular
Biología celular Biología celular.
La bioquímica es la bioquímica.

Sus antecedentes:

La localización precisa y la dinámica de los ribosomas durante la síntesis de proteínas son cruciales para la función celular.
La comprensión del tráfico de ribosomas involucrados en la traducción de los ARN mensajeros del secretoma (ARNm) es clave para las vías de secreción de proteínas.

Objetivo del estudio:

Para investigar el modelo propuesto de tráfico de ribosomas para la traducción del ARNm secretoma.
Para determinar si los ribosomas inician la traducción en el retículo endoplasmático (ER) y su dinámica de retención.

Principales métodos:

Se utilizaron controles para rastrear las interacciones entre ribosoma y ARNm y la localización durante la traducción.
Se analizó la unión y retención de ribosomas en la ER durante múltiples ciclos de traducción.

Principales resultados:

Demostró que la traducción de los ARNm secretómicos se inicia en los ribosomas unidos a ER.
Proporcionó evidencia de que los ribosomas permanecen asociados con la ER a través de numerosos ciclos de traducción.

Conclusiones:

Apoya el modelo en el que los ribosomas que traducen el tráfico de ARNm del secretoma al ER al surgir el péptido de señal y se retienen para la traducción sostenida.
Sugiere una asociación dinámica pero estable de los ribosomas con la ER para una secreción eficiente de proteínas.

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