Johnson, Nicholas; Březinová, Jana; Stephens, Elaine; Burbridge, Emma; Freeman, Matthew; Adrain, Colin; Strisovsky, Kvido
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Lemberg, Marius K; Adrain, Colin
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Nguyen, Lan K; Cavadas, Miguel A S; Kholodenko, Boris N; Frank, Till D; Cheong, Alex
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Cavadas, Miguel A. S.; Mesnieres, Marion; Crifo, Bianca; Manresa, Mario C.; Selfridge, Andrew C.; Keogh, Ciara E.; Fabian, Zsolt; Scholz, Carsten C.; Nolan, Karen A.; Rocha, Liliane M. A.; Tambuwala, Murtaza M.; Brown, Stuart; Wdowicz, Anita; Corbett, Danielle; Murphy, Keith J.; Godson, Catherine; Cummins, Eoin P.; Taylor, Cormac T.; Cheong, Alex
Cellular exposure to hypoxia results in altered gene expression in a range of physiologic and pathophysiologic states. Discrete cohorts of genes can be either up- or down-regulated in response to hypoxia. While the Hypoxia-Inducible Factor (HIF) is the primary driver of hypoxia-induced adaptive gene expression, less is known about the signalling mechanisms regulating hypoxia-dependent gene repression. Using RNA-seq, we demonstrate that equivalent numbers of genes are induced and repressed in human embryonic kidney (HEK293) cells. We demonstrate that nuclear localization of the Repressor Element 1-Silencing Transcription factor (REST) is induced in hypoxia and that REST is responsible for regulating approximately...
Wunderle, Lina; Knopf, Julia D.; Kühnle, Nathalie; Morlé, Aymeric; Hehn, Beate; Adrain, Colin; Strisovsky, Kvido; Freeman, Matthew; Lemberg, Marius K.
Rhomboid intramembrane proteases are the enzymes that release active epidermal growth factor receptor (EGFR) ligands in Drosophila and C. elegans, but little is known about their functions in mammals. Here we show that the mammalian rhomboid protease RHBDL4 (also known as Rhbdd1) promotes trafficking of several membrane proteins, including the EGFR ligand TGFα, from the endoplasmic reticulum (ER) to the Golgi apparatus, thereby triggering their secretion by extracellular microvesicles. Our data also demonstrate that RHBDL4-dependent trafficking control is regulated by G-protein coupled receptors, suggesting a role for this rhomboid protease in pathological conditions, including EGFR signaling. We propose that RHBDL4...