97 results found
    1. Cell Biology

    Impaired lysosomal acidification triggers iron deficiency and inflammation in vivo

    King Faisal Yambire, Christine Rostosky ... Nuno Raimundo
    Impaired lysosomal acidification results in retention of iron inside lysosomes, triggering functional iron deficiency, dysfunctional mitochondria (especially mtDNA loss), and inflammation in vivo in a mouse model of lysosomal disease.
    1. Cell Biology

    A genetic screen identifies new steps in oocyte maturation that enhance proteostasis in the immortal germ lineage

    Madhuja Samaddar, Jérôme Goudeau ... Cynthia Kenyon
    A whole-genome genetic screen links new aspects of oocyte maturation to proteostasis renewal in the immortal Caenorhabditis elegans germ-cell lineage and reveals similarities to somatic cell maintenance during aging.
    1. Cell Biology
    2. Neuroscience

    Degradation of engulfed mitochondria is rate-limiting in Optineurin-mediated mitophagy in neurons

    Chantell S Evans, Erika LF Holzbaur
    In neuronal mitophagy, Parkin and OPTN induce efficient sequestration of damaged somal mitochondria into autophagosomes, but slow turnover via lysosomal acidification may be a point of vulnerability for the cell.
    1. Cell Biology

    Selective clearance of the inner nuclear membrane protein emerin by vesicular transport during ER stress

    Abigail Buchwalter, Roberta Schulte ... Martin Hetzer
    Emerin, a protein that plays key roles in nuclear organization, can be dynamically degraded in response to environmental stimuli such as ER stress.
    1. Cell Biology

    A novel live-cell imaging assay reveals regulation of endosome maturation

    Maria Podinovskaia, Cristina Prescianotto-Baschong ... Anne Spang
    A novel, inexpensive, easy-to-use method to analyse traffic along the endosomal pathway in mammalian cells shows that there is coordination between Rab conversion and acidification, but almost none between Rab conversion and recycling.
    1. Cell Biology
    2. Neuroscience

    The endoplasmic reticulum, not the pH gradient, drives calcium refilling of lysosomes

    Abigail G Garrity, Wuyang Wang ... Haoxing Xu
    The endoplasmic reticulum serves as a direct and primary source of calcium ions for the lysosome.
    1. Cell Biology

    trim-21 promotes proteasomal degradation of CED-1 for apoptotic cell clearance in C. elegans

    Lei Yuan, Peiyao Li ... Hui Xiao
    The phagocytic receptor CED-1 is kept at the appropriate level by E3 ligase trim-21-mediated ubiquitination-proteasomal degradation for apoptotic cell clearance, which is independent of retromer-dependent recycling and lysosomal degradation.
    1. Cell Biology
    2. Neuroscience

    VCP-dependent muscle degeneration is linked to defects in a dynamic tubular lysosomal network in vivo

    Alyssa E Johnson, Huidy Shu ... Graeme W Davis
    The AAA-ATPase VCP sustains sarcoplasmic proteostasis, in part, by controlling autophagosome-lysosome fusion and the integrity of a dynamic tubular lysosomal network.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    The vacuolar-ATPase complex and assembly factors, TMEM199 and CCDC115, control HIF1α prolyl hydroxylation by regulating cellular iron levels

    Anna L Miles, Stephen P Burr ... James A Nathan
    An unbiased genome-wide human forward genetic screen identifies the vacuolar ATPase complex and assembly factors as regulators of HIF stability through their actions on intracellular iron metabolism.
    1. Structural Biology and Molecular Biophysics

    Tonic inhibition of the chloride/proton antiporter ClC-7 by PI(3,5)P2 is crucial for lysosomal pH maintenance

    Xavier Leray, Jacob K Hilton ... Joseph A Mindell
    Inhibiyiton of the lysosomal chloride-proton antiporter ClC-7 by the signaling lipid PI(3,5)P2 is important for lysosomal pH maintenance and is disrupted by a disease-causing gain-of-function mutation.

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