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Targeted protein unfolding uncovers a Golgi-specific transcriptional stress response

In eukaryotic cells, organelle-specific stress-response mechanisms are vital for maintaining cellular homeostasis. The Golgi apparatus, an essential organelle of the secretory system, is the major site of protein modification and sorting within a cell and functions as a platform for spatially regula...

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Detalles Bibliográficos
Autores principales: Serebrenik, Yevgeniy V., Hellerschmied, Doris, Toure, Momar, López-Giráldez, Francesc, Brookner, Dennis, Crews, Craig M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The American Society for Cell Biology 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5994893/
https://www.ncbi.nlm.nih.gov/pubmed/29851555
http://dx.doi.org/10.1091/mbc.E17-11-0693
Descripción
Sumario:In eukaryotic cells, organelle-specific stress-response mechanisms are vital for maintaining cellular homeostasis. The Golgi apparatus, an essential organelle of the secretory system, is the major site of protein modification and sorting within a cell and functions as a platform for spatially regulated signaling. Golgi homeostasis mechanisms that regulate organelle structure and ensure precise processing and localization of protein substrates remain poorly understood. Using a chemical biology strategy to induce protein unfolding, we uncover a Golgi-specific transcriptional response. An RNA-sequencing profile of this stress response compared with the current state-of-the-art Golgi stressors, nigericin and xyloside, demonstrates the enhanced precision of Golgi targeting achieved with our system. The data set further reveals previously uncharacterized genes that we find to be essential for Golgi structural integrity. These findings highlight the Golgi’s ability to sense misfolded proteins and establish new aspects of Golgi autoregulation.