ArticleScientific reports2018
Expression and Regulation of Deubiquitinase-Resistant, Unanchored Ubiquitin Chains in Drosophila.
Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed.
- Linear poly-ubiquitin remodels the proteome and influences hundreds of regulators in Drosophila.G3 (Bethesda, Md.) · 2024Article
- K29-linked free polyubiquitin chains affect ribosome biogenesis and direct ribosomal proteins to the intranuclear quality control compartment.Molecular cell · 2024Article
- Lysine 117 on ataxin-3 modulates toxicity in Drosophila models of Spinocerebellar Ataxia Type 3.Journal of the neurological sciences · 2023Article
- Article
- Endurance exercise ameliorates phenotypes ineLife · 2022Article
- Ubiquitin-binding site 1 of pathogenic ataxin-3 regulates its toxicity inFrontiers in neuroscience · 2022Article
- Targeting the VCP-binding motif of ataxin-3 improves phenotypes in Drosophila models of Spinocerebellar Ataxia Type 3.Neurobiology of disease · 2021Article
- Article
- Article
- Unanchored Ubiquitin Chains, Revisited.Frontiers in cell and developmental biology · 2020Review
- Differential toxicity of ataxin-3 isoforms in Drosophila models of Spinocerebellar Ataxia Type 3.Neurobiology of disease · 2019Article
- Unanchored ubiquitin chains do not lead to marked alterations in gene expression inBiology open · 2019Article
- The ATPase TER94 regulates Notch signaling duringBiology open · 2019Article
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5 authors.
Funding
Abstract
The modifier protein, ubiquitin (Ub) regulates various cellular pathways by controlling the fate of substrates to which it is conjugated. Ub moieties are also conjugated to each other, forming chains of various topologies. In cells, poly-Ub is attached to proteins and also exists in unanchored form. Accumulation of unanchored poly-Ub is thought to be harmful and quickly dispersed through dismantling by deubiquitinases (DUBs). We wondered whether disassembly by DUBs is necessary to control unanchored Ub chains in vivo. We generated Drosophila melanogaster lines that express Ub chains non-cleavable into mono-Ub by DUBs. These chains are rapidly modified with different linkages and represent various types of unanchored species. We found that unanchored poly-Ub is not devastating in Drosophila, under normal conditions or during stress. The DUB-resistant, free Ub chains are degraded by the proteasome, at least in part through the assistance of VCP and its cofactor, p47. Also, unanchored poly-Ub that cannot be cleaved by DUBs can be conjugated en bloc, in vivo. Our results indicate that unanchored poly-Ub species need not be intrinsically toxic; they can be controlled independently of DUB-based disassembly by being degraded, or through conjugation onto other proteins.
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