KDEL receptor regulates secretion by lysosome relocation- and autophagy-dependent modulation of lipid-droplet turnover

Diego Tapia, Tomás Jiménez, Constanza Zamora, Javier Espinoza, Riccardo Rizzo, Alexis González-Cárdenas, Danitza Fuentes, Sergio Hernández, Viviana A. Cavieres, Andrea Soza, Fanny Guzmán, Gloria Arriagada, María Isabel Yuseff, Gonzalo A. Mardones, Patricia V. Burgos, Alberto Luini, Alfonso González, Jorge Cancino

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Inter-organelle signalling has essential roles in cell physiology encompassing cell metabolism, aging and temporal adaptation to external and internal perturbations. How such signalling coordinates different organelle functions within adaptive responses remains unknown. Membrane traffic is a fundamental process in which membrane fluxes need to be sensed for the adjustment of cellular requirements and homeostasis. Studying endoplasmic reticulum-to-Golgi trafficking, we found that Golgi-based, KDEL receptor-dependent signalling promotes lysosome repositioning to the perinuclear area, involving a complex process intertwined to autophagy, lipid-droplet turnover and Golgi-mediated secretion that engages the microtubule motor protein dynein-LRB1 and the autophagy cargo receptor p62/SQSTM1. This process, here named ‘traffic-induced degradation response for secretion’ (TIDeRS) discloses a cellular mechanism by which nutrient and membrane sensing machineries cooperate to sustain Golgi-dependent protein secretion.

Original languageEnglish
Article number735
JournalNature Communications
Volume10
Issue number1
DOIs
Publication statusPublished - 13 Feb 2019

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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