Examinando por Autor "Luini, Alberto"
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Ítem Control systems and coordination protocols of the secretory pathway(Faculty of 1000 Ltd, 2014-10) Luini, Alberto; Mavelli, Gabriella; Jung, Juan; Cancino, JorgeLike other cellular modules, the secretory pathway and the Golgi complex are likely to be supervised by control systems that support homeostasis and optimal functionality under all conditions, including external and internal perturbations. Moreover, the secretory apparatus must be functionally connected with other cellular modules, such as energy metabolism and protein degradation, via specific rules of interaction, or “coordination protocols”. These regulatory devices are of fundamental importance for optimal function; however, they are generally “hidden” at steady state. The molecular components and the architecture of the control systems and coordination protocols of the secretory pathway are beginning to emerge through studies based on the use of controlled transport-specific perturbations aimed specifically at the detection and analysis of these internal regulatory devices.Ítem KDEL receptor regulates secretion by lysosome relocation- and autophagy-dependent modulation of lipid-droplet turnover(Nature Publishing Group, 2019-12) Tapia, Diego; Jiménez, Tomás; Zamora, Constanza; Espinoza, Javier; Rizzo, Riccardo; González-Cárdenas, Alexis; Fuentes, Danitza; Hernández, Sergio; Cavieres, Viviana A.; Soza, Andrea; Guzmán, Fanny; Arriagada, Gloria; Yuseff, María Isabel; Mardones, Gonzalo A.; Burgos, Patricia V.; Luini, Alberto; González, Alfonso; Cancino, JorgeInter-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. © 2019, The Author(s).