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Perfilamiento cuantitativo de las carbonilaciones de proteínas en la ferroptosis mediante una sonda derivada de la
1Institute of Developmental Genetics , Helmholtz Zentrum Munchen , Munchen , Germany.
Journal of the American Chemical Society
|March 24, 2018
Resumen
Los investigadores desarrollaron un nuevo método para detectar la carbonilación de proteínas durante la ferroptosis, un proceso de muerte celular relacionado con el cáncer y la neurodegeneración. Identificaron más de 400 proteínas modificadas y un sitio clave en VDAC2, ayudando a la comprensión y detección de la ferroposis.
Área de la Ciencia:
- La bioquímica
- Biología celular
- Proteomía
Sus antecedentes:
- La ferroptosis es una vía de muerte celular necrótica regulada impulsada por la peroxidación de lípidos.
- Los electrofilos derivados de lípidos (LDEs) generados durante la ferroposis pueden modificar las proteínas, afectando su función.
- Comprender estas modificaciones de proteínas es crucial para descifrar los mecanismos de ferroposis.
Objetivo del estudio:
- Desarrollar un método quimioproteómico cuantitativo para perfilar las carbonilaciones de proteínas en la ferroptosis.
- Mapear globalmente los sitios de carbonilación de proteínas e identificar las modificaciones endógenas de LDE en las células ferroptóticas.
- Investigar el papel de las modificaciones de proteínas específicas en la señalización de la ferroposis.
Principales métodos:
- Desarrollo de un enfoque quimioproteómico cuantitativo utilizando una sonda derivada de la anilina.
- Perfilamiento de las carbonilaciones de proteínas en células ferroptóticas.
- Identificación por espectrometría de masas de las proteínas modificadas y de los sitios de residuos.
Principales resultados:
- Estableció un retrato global de las carbonilaciones de proteínas en la ferroptosis, identificando más de 400 proteínas modificadas endógenamente.
- Se identificaron más de 20 sitios de residuos con modificaciones endógenas de LDE en células ferroptóticas.
- Se descubrió y validó un nuevo sitio de modificación de la cisteína en VDAC2, que podría mediar la ferroptosis.
Conclusiones:
- El método desarrollado proporciona una visión completa de la carbonilación de proteínas en la ferroptosis.
- Los hallazgos revelan objetivos específicos de proteínas y sitios de modificación involucrados en la ferroptosis.
- Esta investigación contribuye a la comprensión de la patogénesis de la ferroposis y ofrece posibles biomarcadores para su detección.
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