ArticleEMBO reports2023
C9orf72 protein quality control by UBR5-mediated heterotypic ubiquitin chains.
Article in EMBO reports, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 11 citations in OpenAlex.
- Integrative Phosphoproteomic Profiling Reveals Stage-Specific Signalling and Metabolism in Equine Melanocytic Neoplasm.Veterinary and comparative oncology · 2026Article
- UBR5: A New Player in Protein Quality Control for Skeletal Muscle Growth and Remodeling.Exercise and sport sciences reviews · 2025Review
- Interactome screening implicates BAG6 as a suppressor of UBQLN2 misfolding in ALS/FTD.Frontiers in molecular neuroscience · 2025Article
- UBR-5 and UBE2D mediate timely exit from stem fate via destabilization of poly(A)-binding protein PABP-2 in cell state transition.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- The emerging roles of non-canonical ubiquitination in proteostasis and beyond.The Journal of cell biology · 2024Review
- The GATOR2 complex maintains lysosomal-autophagic function by inhibiting the protein degradation of MiT/TFEs.Molecular cell · 2024Article
- Article
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Authors and funding
3 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Hexanucleotide repeat expansions within C9orf72 are a frequent cause of amyotrophic lateral sclerosis and frontotemporal dementia. Haploinsufficiency leading to reduced C9orf72 protein contributes to disease pathogenesis. C9orf72 binds SMCR8 to form a robust complex that regulates small GTPases, lysosomal integrity, and autophagy. In contrast to this functional understanding, we know far less about the assembly and turnover of the C9orf72-SMCR8 complex. Loss of either subunit causes the concurrent ablation of the respective partner. However, the molecular mechanism underlying this interdependence remains elusive. Here, we identify C9orf72 as a substrate of branched ubiquitin chain-dependent protein quality control. We find that SMCR8 prevents C9orf72 from rapid degradation by the proteasome. Mass spectrometry and biochemical analyses reveal the E3 ligase UBR5 and the BAG6 chaperone complex as C9orf72-interacting proteins, which are components of the machinery that modifies proteins with K11/K48-linked heterotypic ubiquitin chains. Depletion of UBR5 results in reduced K11/K48 ubiquitination and increased C9orf72 when SMCR8 is absent. Our data provide novel insights into C9orf72 regulation with potential implication for strategies to antagonize C9orf72 loss during disease progression.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.