Video Experimental Relacionado
Updated: Dec 7, 2025
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Assessing Cellular Target Engagement by SHP2 PTPN11 Phosphatase Inhibitors
Published on: July 17, 2020
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La separación de fase de los mutantes SHP2 asociados a la enfermedad subyace a la hiperactivación de MAPK
Guangya Zhu1, Jingjing Xie1, Wenna Kong1
1Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 201203, China; University of the Chinese Academy of Sciences, Beijing 100049, China.
Cell
|October 1, 2020
Resumen
Las mutaciones SHP2 asociadas a la enfermedad causan trastornos del desarrollo al promover la separación de fase líquido-líquido (LLPS). La inhibición de SHP2 LLPS restaura la actividad de la proteína tirosina fosfatasa (PTP) y puede ofrecer estrategias terapéuticas para estas afecciones.
Área de la Ciencia:
- La bioquímica
- Biología molecular
- La genética
Sus antecedentes:
- SHP2 (PTPN11) es una proteína tirosina fosfatasa no receptora crucial para la señalización RAS-MAPK en el desarrollo.
- Las mutaciones activadoras e inactivadoras de PTPN11 causan trastornos de desarrollo superpuestos, una paradoja inexplicable por la actividad enzimática sola.
Objetivo del estudio:
- Investigar el papel de la separación de fase líquido-líquido (LLPS) en los trastornos del desarrollo asociados con SHP2.
- Determinar si el LLPS es un mecanismo común para los mutantes SHP2 asociados a la enfermedad.
- Explorar el objetivo terapéutico de SHP2 LLPS.
Principales métodos:
- Análisis del comportamiento del mutante SHP2 utilizando ensayos LLPS.
- Investigó el papel del dominio PTP en SHP2 LLPS.
- Se evaluó el impacto de los inhibidores alostéricos en la SHP2 y su actividad.
- Estudió la interacción entre el SHP2 mutante y el tipo salvaje dentro de los condensados de LLPS.
Principales resultados:
- Los mutantes SHP2 asociados a la enfermedad exhiben un comportamiento LLPS común mediado por el dominio PTP.
- SHP2 LLPS está regulado por un mecanismo autoinhibidor y puede ser atenuado por inhibidores alostéricos, aumentando la actividad de PTP.
- El SHP2 mutante en LLPS puede reclutar y activar el SHP2 de tipo salvaje, promoviendo la señalización MAPK.
Conclusiones:
- LLPS actúa como un mecanismo de ganancia de función en enfermedades humanas relacionadas con SHP2.
- El LLPS es un nuevo mecanismo de regulación de las proteínas tirosina fosfatasas (PTP).
- Dirigirse a SHP2 LLPS presenta una estrategia terapéutica potencial para los trastornos del desarrollo.
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