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dc.contributor.authorLee, T. V.
dc.contributor.authorKamber Kaya, H. E.
dc.contributor.authorSimin, Rachel T.
dc.contributor.authorBaehrecke, Eric H.
dc.contributor.authorBergmann, Andreas
dc.date2022-08-11T08:09:19.000
dc.date.accessioned2022-08-23T16:26:26Z
dc.date.available2022-08-23T16:26:26Z
dc.date.issued2016-09-01
dc.date.submitted2016-09-26
dc.identifier.citationCell Death Differ. 2016 Sep 1;23(9):1555-64. doi: 10.1038/cdd.2016.40. Epub 2016 Apr 22. <a href="http://dx.doi.org/10.1038/cdd.2016.40">Link to article on publisher's site</a>
dc.identifier.issn1350-9047 (Linking)
dc.identifier.doi10.1038/cdd.2016.40
dc.identifier.pmid27104928
dc.identifier.urihttp://hdl.handle.net/20.500.14038/36563
dc.description.abstractA major function of ubiquitylation is to deliver target proteins to the proteasome for degradation. In the apoptotic pathway in Drosophila, the inhibitor of apoptosis protein 1 (Diap1) regulates the activity of the initiator caspase Dronc (death regulator Nedd2-like caspase; caspase-9 ortholog) by ubiquitylation, supposedly targeting Dronc for degradation by the proteasome. Using a genetic approach, we show that Dronc protein fails to accumulate in epithelial cells with impaired proteasome function suggesting that it is not degraded by the proteasome, contrary to the expectation. Similarly, decreased autophagy, an alternative catabolic pathway, does not result in increased Dronc protein levels. However, combined impairment of the proteasome and autophagy triggers accumulation of Dronc protein levels suggesting that autophagy compensates for the loss of the proteasome with respect to Dronc turnover. Consistently, we show that loss of the proteasome enhances endogenous autophagy in epithelial cells. We propose that enhanced autophagy degrades Dronc if proteasome function is impaired.
dc.language.isoen_US
dc.relation<a href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&list_uids=27104928&dopt=Abstract">Link to Article in PubMed</a>
dc.relation.urlhttp://dx.doi.org/10.1038/cdd.2016.40
dc.subjectBiochemistry
dc.subjectCell Biology
dc.subjectCellular and Molecular Physiology
dc.subjectMolecular Biology
dc.titleThe initiator caspase Dronc is subject of enhanced autophagy upon proteasome impairment in Drosophila
dc.typeJournal Article
dc.source.journaltitleCell death and differentiation
dc.source.volume23
dc.source.issue9
dc.identifier.legacycoverpagehttps://escholarship.umassmed.edu/mccb_pubs/60
dc.identifier.contextkey9198095
html.description.abstract<p>A major function of ubiquitylation is to deliver target proteins to the proteasome for degradation. In the apoptotic pathway in Drosophila, the inhibitor of apoptosis protein 1 (Diap1) regulates the activity of the initiator caspase Dronc (death regulator Nedd2-like caspase; caspase-9 ortholog) by ubiquitylation, supposedly targeting Dronc for degradation by the proteasome. Using a genetic approach, we show that Dronc protein fails to accumulate in epithelial cells with impaired proteasome function suggesting that it is not degraded by the proteasome, contrary to the expectation. Similarly, decreased autophagy, an alternative catabolic pathway, does not result in increased Dronc protein levels. However, combined impairment of the proteasome and autophagy triggers accumulation of Dronc protein levels suggesting that autophagy compensates for the loss of the proteasome with respect to Dronc turnover. Consistently, we show that loss of the proteasome enhances endogenous autophagy in epithelial cells. We propose that enhanced autophagy degrades Dronc if proteasome function is impaired.</p>
dc.identifier.submissionpathmccb_pubs/60
dc.contributor.departmentUMass Metabolic Network
dc.contributor.departmentDepartment of Molecular, Cell and Cancer Biology
dc.source.pages1555-64


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