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Université de Fribourg

Raft-like lipid microdomains drive autophagy initiation via AMBRA1-ERLIN1 molecular association within MAMs

Manganelli, Valeria ; Matarrese, Paola ; Antonioli, Manuela ; Gambardella, Lucrezia ; Vescovo, Tiziana ; Gretzmeier, Christine ; Longo, Agostina ; Capozzi, Antonella ; Recalchi, Serena ; Riitano, Gloria ; Misasi, Roberta ; Dengjel, Jörn ; Malorni, Walter ; Fimia, Gian Maria ; Sorice, Maurizio ; Garofalo, Tina

In: Autophagy, 2020, p. 1-21

Mitochondria-associated membranes (MAMs) are essential communication subdomains of the endoplasmic reticulum (ER) that interact with mitochondria. We previously demonstrated that, upon macroautophagy/autophagy induction, AMBRA1 is recruited to the BECN1 complex and relocalizes to MAMs, where it regulates autophagy by interacting with raft-like components. ERLIN1 is an endoplasmic reticulum...

Université de Fribourg

Protein complexes and neighborhoods driving autophagy

Siva Sankar, Devanarayanan ; Dengjel, Jörn

In: Autophagy, 2020, vol. 0, no. 0, p. 1–17

Autophagy summarizes evolutionarily conserved, intracellular degradation processes targeting cytoplasmic material for lysosomal degradation. These encompass constitutive processes as well as stress responses, which are often found dysregulated in diseases. Autophagy pathways help in the clearance of damaged organelles, protein aggregates and macromolecules, mediating their recycling and ...

Università della Svizzera italiana

Proteasomal and lysosomal clearance of faulty secretory proteins : ER-associated degradation (ERAD) and ER-to-lysosome-associated degradation (ERLAD) pathways

Fregno, Ilaria ; Molinari, Maurizio

In: Critical reviews in biochemistry and molecular biology, 2019, vol. 54, no. 2, p. 153-163

About 40% of the eukaryotic cell’s proteins are inserted co- or post-translationally in the endoplasmic reticulum (ER), where they attain the native structure under the assistance of resident molecular chaperones and folding enzymes. Subsequently, these proteins are secreted from cells or are transported to their sites of function at the plasma membrane or in organelles of the secretory and ...

Université de Fribourg

The flavonoid 4,4′-dimethoxychalcone promotes autophagy-dependent longevity across species

Carmona-Gutierrez, Didac ; Zimmermann, Andreas ; Kainz, Katharina ; Pietrocola, Federico ; Chen, Guo ; Maglioni, Silvia ; Schiavi, Alfonso ; Nah, Jihoon ; Mertel, Sara ; Beuschel, Christine B. ; Castoldi, Francesca ; Sica, Valentina ; Trausinger, Gert ; Raml, Reingard ; Sommer, Cornelia ; Schroeder, Sabrina ; Hofer, Sebastian J. ; Bauer, Maria A. ; Pendl, Tobias ; Tadic, Jelena ; Dammbrueck, Christopher ; Hu, Zehan ; Ruckenstuhl, Christoph ; Eisenberg, Tobias ; Durand, Sylvere ; Bossut, Noélie ; Aprahamian, Fanny ; Abdellatif, Mahmoud ; Sedej, Simon ; Enot, David P. ; Wolinski, Heimo ; Dengjel, Jörn ; Kepp, Oliver ; Magnes, Christoph ; Sinner, Frank ; Pieber, Thomas R. ; Sadoshima, Junichi ; Ventura, Natascia ; Sigrist, Stephan J. ; Kroemer, Guido ; Madeo, Frank

In: Nature Communications, 2019, vol. 10, no. 1, p. 651

Ageing constitutes the most important risk factor for all major chronic ailments, including malignant, cardiovascular and neurodegenerative diseases. However, behavioural and pharmacological interventions with feasible potential to promote health upon ageing remain rare. Here we report the identification of the flavonoid 4,4′- dimethoxychalcone (DMC) as a natural compound with anti-ageing...

Université de Fribourg

Influenza A virus induces autophagosomal targeting of ribosomal proteins

Becker, Andrea C. ; Gannagé, Monique ; Giese, Sebastian ; Hu, Zehan ; Abou-Eid, Shadi ; Roubaty, Carole ; Paul, Petra ; Bühler, Lea ; Gretzmeier, Christine ; Dumit, Veronica I. ; Kaeser-Pebernard, Stéphanie ; Schwemmle, Martin ; Münz, Christian ; Dengjel, Jörn

In: Molecular & Cellular Proteomics, 2018, vol. 17, no. 10, p. 1909–1921

Seasonal epidemics of influenza A virus are a major cause of severe illness and are of high socio-economic relevance. For the design of effective antiviral therapies, a detailed knowledge of pathways perturbed by virus infection is critical. We performed comprehensive expression and organellar proteomics experiments to study the cellular consequences of influenza A virus infection using three...