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Reubicación específica de las proteínas mediante el acoplamiento de transporte de proteínas
Christine S C Ng1, Aofei Liu1, Bianxiao Cui1
1Department of Chemistry, Stanford University, Stanford, CA, USA.
Nature
|September 18, 2024
Resumen
Los investigadores desarrollaron moléculas activadoras de relocalización dirigidas (TRAM) para controlar la localización de proteínas para el tratamiento de la enfermedad. Los TRAMs aprovechan las proteínas de transporte para recablear los interactomas celulares, lo que es prometedor en los modelos de enfermedades neurodegenerativas.
Área de la Ciencia:
- Biología celular
- La medicina molecular
- La bioquímica
Sus antecedentes:
- La localización de proteínas subcelulares es crucial para la función de las proteínas y a menudo se interrumpe en enfermedades como el cáncer y la neurodegeneración.
- Las estrategias terapéuticas dirigidas que recablean la localización de proteínas para corregir los fenotipos de la enfermedad son altamente deseables.
Objetivo del estudio:
- Desarrollar y validar moléculas activadoras de relocalización dirigidas (TRAM) para controlar la localización de proteínas subcelulares.
- Demostrar el potencial de los TRAM en la corrección de la deslocalización de proteínas que impulsan la enfermedad y el recableado de los interactomas celulares.
Principales métodos:
- Identificación de proteínas lanzadera con ligandos adecuados para el desarrollo de TRAM.
- Utilizando una tubería de análisis de imágenes personalizada para evaluar la reubicación de proteínas inducida por TRAM.
- Empleando receptores de hormonas nucleares y proteínas endógenas como lanzaderas para redistribuir las proteínas asociadas a la enfermedad.
Principales resultados:
- Se ha demostrado la modulación exitosa de la localización de estado estacionario de proteínas mediante el acoplamiento molecular a las proteínas de transporte.
- Se demostró la reubicación nuclear mediada por TRAM de FUS mutante (FUS ^ R495X), reduciendo los gránulos de estrés en un modelo de estrés celular.
- Se logró la reubicación de proteínas endógenas (PRMT9, SOS1, FKBP12) utilizando proteínas lanzadera endógenas.
- Se demostró que la redistribución de nucleótidos de nicotinamida adenililtransferasa 1 inducida por pequeñas moléculas hacia los axones ralentizaba la degeneración axonal en ratones.
Conclusiones:
- La relocalización dirigida de proteínas mediante TRAM es una estrategia viable para la intervención terapéutica.
- Este enfoque ofrece una forma novedosa de volver a conectar los interactomas celulares y abordar los mecanismos de la enfermedad.
- Los hallazgos abren nuevas vías para desarrollar tratamientos para enfermedades neurodegenerativas y otras afecciones caracterizadas por la deslocalización de proteínas.
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