0000000000142981

AUTHOR

Elisabeth Stürner

showing 3 related works from this author

BAG3 Proteomic Signature under Proteostasis Stress

2020

The multifunctional HSP70 co-chaperone BAG3 (BCL-2-associated athanogene 3) represents a key player in the quality control of the cellular proteostasis network. In response to stress, BAG3 specifically targets aggregation-prone proteins to the perinuclear aggresome and promotes their degradation via BAG3-mediated selective macroautophagy. To adapt cellular homeostasis to stress, BAG3 modulates and functions in various cellular processes and signaling pathways. Noteworthy, dysfunction and deregulation of BAG3 and its pathway are pathophysiologically linked to myopathies, cancer, and neurodegenerative disorders. Here, we report a BAG3 proteomic signature under proteostasis stress. To elucidat…

ProteomicsautophagyCell signalingCellular homeostasisinteractomeBiologyBAG3InteractomeArticleStress PhysiologicalHumansddc:610Protein Interaction Mapsprotein quality controllcsh:QH301-705.5Adaptor Proteins Signal TransducingProto-Oncogene Proteins c-yesproteostasisBAG3AutophagyMolecular Sequence Annotationstress responseGeneral MedicineCell biologyGene OntologyHEK293 CellsAggresomeProteostasislcsh:Biology (General)Multivariate AnalysisSignal transductionApoptosis Regulatory ProteinsProteasome InhibitorsProtein BindingCells
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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 Role of the Multifunctional BAG3 Protein in Cellular Protein Quality Control and in Disease

2017

In neurons, but also in all other cells the complex proteostasis network is monitored and tightly regulated by the cellular protein quality control (PQC) system. Beyond folding of newly synthesized polypeptides and their refolding upon misfolding the PQC also manages the disposal of aberrant proteins either by the ubiquitin-proteasome machinery or by the autophagic-lysosomal system. Aggregated proteins are primarily degraded by a process termed selective macroautophagy (or aggrephagy). One such recently discovered selective macroautophagy pathway is mediated by the multifunctional HSP70 co-chaperone BAG3 (BCL-2-associated athanogene 3). Under acute stress and during cellular aging, BAG3 in …

0301 basic medicineHuntingtinSOD1AggrephagyReviewBAG3lcsh:RC321-57103 medical and health sciencesCellular and Molecular NeuroscienceUbiquitinselective macroautophagymedicineprotein quality controllcsh:Neurosciences. Biological psychiatry. NeuropsychiatryMolecular BiologyproteostasisbiologyBAG3NeurodegenerationAutophagymedicine.diseaseCell biology030104 developmental biologyProteostasisneurodegenerative disordersbiology.proteinNeuroscienceFrontiers in Molecular Neuroscience
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