ArticleiScience2025
Engineering a cell-based orthogonal ubiquitin transfer cascade for profiling the substrates of RBR E3 Parkin.
Article in iScience, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Substrate Profiling of RNF216 Uncovers a Translation-Linked OTUD4 Regulatory Axis.bioRxiv : the preprint server for biology · 2026Article
- Dual Pathways of UBE4B Inhibit Apoptosis in p53-Positive Tumor Cells via CCAR2 Degradation.International journal of molecular sciences · 2026Article
- Engineering an orthogonal ubiquitin transfer cascade with RING E3 RNF38 by phage display to reveal its regulation of nuclear transport.The Journal of biological chemistry · 2026Article
- UBE4B Mediates Mitophagy via NIPSNAP1 Ubiquitination and NDP52 Recruitment.International journal of molecular sciences · 2026Article
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Authors and funding
19 authors.
Funding
Abstract
The E3 ubiquitin (UB) ligase Parkin utilizes a Ring-Between-Ring (RBR) domain to mediate UB transfer to substrate proteins, and mutations affecting Parkin catalysis promote cancer and are associated with Parkinson's disease. An essential role of Parkin is to initiate mitophagy by ubiquitinating mitochondrial proteins. Still, it is unclear how Parkin carries out other cellular functions, such as the regulation of the cell cycle, metabolism, and the neuronal synapse. Here, we used phage display to engineer the RBR domain of Parkin and assembled an orthogonal ubiquitin transfer (OUT) cascade to profile Parkin substrates in living cells. Guided by the substrate profile from the OUT screen, we verified a panel of Rab GTPases and CDK5 as Parkin substrates. We also showed mitophagy stimulation enhanced Parkin-mediated ubiquitination of Rab proteins. Our work demonstrates that the OUT cascade can be an empowering tool for identifying Parkin substrates to elucidate its multifaceted cellular functions.
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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 Socratic graph.