Search results for " Label-free quantification"

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Enhanced autophagic-lysosomal activity and increased BAG3-mediated selective macroautophagy as adaptive response of neuronal cells to chronic oxidati…

2019

Oxidative stress and a disturbed cellular protein homeostasis (proteostasis) belong to the most important hallmarks of aging and of neurodegenerative disorders. The proteasomal and autophagic-lysosomal degradation pathways are key measures to maintain proteostasis. Here, we report that hippocampal cells selected for full adaptation and resistance to oxidative stress induced by hydrogen peroxide (oxidative stress-resistant cells, OxSR cells) showed a massive increase in the expression of components of the cellular autophagic-lysosomal network and a significantly higher overall autophagic activity. A comparative expression analysis revealed that distinct key regulators of autophagy are upregu…

0301 basic medicineClinical BiochemistryLFQ Label-free quantificationLETM Leucine zipper and EF-hand containing transmembrane proteinmedicine.disease_causeBiochemistryCHX Cycloheximide0302 clinical medicineBNIP3 Bcl-2 interacting protein 3RAPA RapamycinPIK3C3 Class III PI3‐kinasePhosphorylationlcsh:QH301-705.5Neuronslcsh:R5-920PolyUB PolyubiquitinChemistryBAG3OPA1 Optic atrophy 1TOR Serine-Threonine KinasesWIPI1 WD repeat domain phosphoinositide-interacting protein 1ATG Autophagy relatedTFEB Transcription factor EBCell biologyMitochondriasiRNA Small interfering RNADLP1 Dynamin-like protein 1LAMP1 Lysosomal‐associated membrane protein 1PURO Puromycinlcsh:Medicine (General)Protein homeostasisResearch PaperBafA1 Bafilomycin A1LAMP2 Lysosomal‐associated membrane protein 2Proteasome Endopeptidase ComplexRAB18 Member RAS oncogeneTUB TubulinLC3 Light chain 3 proteinOxidative phosphorylationBAG3CTSD Cathepsin DModels BiologicalCell Line03 medical and health sciencesDownregulation and upregulationMacroautophagymedicineAutophagyHumansAdaptationBAG1 Bcl-2-associated athanogene 1BECN1 Beclin1PI3K/AKT/mTOR pathwayAdaptor Proteins Signal TransducingTEM Transmission electron microscopyHsp70 Heat shock protein 70Organic ChemistryAutophagyAutophagosomesmTOR Mammalian target of rapamycinHsp70Oxidative Stress030104 developmental biologyProteostasislcsh:Biology (General)CV CanavanineBAG3 Bcl-2-associated athanogene 3MTT (3-(45-Dimethylthiazol-2-yl)-25-Diphenyltetrazolium Bromide)Apoptosis Regulatory ProteinsLysosomes030217 neurology & neurosurgeryOxidative stressRedox Biology

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The deubiquitinase USP11 is a versatile and conserved regulator of autophagy

2021

Autophagy is a major cellular quality control system responsible for the degradation of proteins and organelles in response to stress and damage to maintain homeostasis. Ubiquitination of autophagy-related proteins or regulatory components is important for the precise control of autophagy pathways. Here, we show that the deubiquitinase ubiquitin-specific protease 11 (USP11) restricts autophagy and that KO of USP11 in mammalian cells results in elevated autophagic flux. We also demonstrate that depletion of the USP11 homolog H34C03.2 in Caenorhabditis elegans triggers hyperactivation of autophagy and protects the animals against human amyloid-β peptide 42 aggregation-induced paralysis. USP11…

autophagyhAβ42 human amyloid-β protein 1 to 42Lipid kinase activityPI(3)P phosphatidylinositol-3-phosphatemTORC1BiochemistryCell LineGene Knockout Techniqueschemistry.chemical_compoundubiquitinAnimalsHumansULK1 unc-51-like autophagy activating kinase 1WIPI WD-repeat domain phosphoinositide-interacting proteinPI3KC3-C1Caenorhabditis elegansCaenorhabditis elegans ProteinsmTORC1Molecular BiologyMechanistic target of rapamycinUSP11 ubiquitin-specific protease 11proteostasisAmyloid beta-PeptidesS6K S6 kinasebiologyPhosphatidylinositol 3-phosphateAutophagyDUB deubiquitinaseLFQ label-free quantificationIP immunoprecipitationNHT nonhuman targetingPI3KC3-C1 class III phosphatidylinositol 3-kinase complex ICell BiologyACN acetonitrileAβ amyloid-βNRBF2 nuclear receptor-binding factor 2Peptide FragmentsCell biologydeubiquitinase (DUB)ProteostasischemistryProteotoxicitymTORC1 mechanistic target of rapamycin complex 1biology.proteinAutophagy-Related Protein-1 HomologBSA bovine serum albuminThiolester HydrolasesResearch ArticleJournal of Biological Chemistry

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