ArticleCell reports2025
The deubiquitinase Rpn11 functions as an allosteric ubiquitin sensor to promote substrate engagement by the 26S proteasome.
Article in Cell reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Stimulating proteasomal degradation in human proteinopathies.The FEBS journal · 2026Review
- Molecular basis of ubiquitin-independent recognition and degradation of ODC/Antizyme by the 26S proteasome.bioRxiv : the preprint server for biology · 2026Article
- Identification of novel ubiquitin receptors on the 26S proteasome by photo-crosslinking mass spectrometry.The Journal of biological chemistry · 2026Article
- Identification of novel ubiquitin receptors on the 26S proteasome by photo-crosslinking mass spectrometry.bioRxiv : the preprint server for biology · 2025Article
- Structural landscape of the degrading 26S proteasome reveals conformation-specific binding of TXNL1.Nature structural & molecular biology · 2025Article
- Ubiquitination-mediated protein homeostasis in cardiovascular diseases: molecular mechanisms and therapeutic opportunities.American journal of cardiovascular disease · 2025Review
- Recombinant Expression of Photo-crosslinkable 26S Proteasome Base Subcomplex.bioRxiv : the preprint server for biology · 2024Article
- Structural landscape of AAA+ ATPase motor states in the substrate-degrading human 26S proteasome reveals conformation-specific binding of TXNL1.bioRxiv : the preprint server for biology · 2024Article
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3 authors.
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Abstract
The 26S proteasome is the major compartmental protease in eukaryotic cells, responsible for the ATP-dependent turnover of obsolete, damaged, or misfolded proteins that are delivered for degradation through attached ubiquitin modifications. Besides targeting substrates to the proteasome, ubiquitin was recently shown to promote degradation initiation by modulating proteasome conformational switching, yet the underlying mechanisms are unknown. Here, we use biochemical, mutational, and single-molecule fluorescence resonance energy transfer (FRET)-based approaches to show that the proteasomal deubiquitinase Rpn11 functions as an allosteric sensor and facilitates the early steps of degradation. After substrate recruitment to the proteasome, ubiquitin binding to Rpn11 interferes with conformation-specific interactions of the ubiquitin receptor subunit Rpn10, thereby stabilizing the proteasome's engagement-competent state and expediting substrate insertion into the ATPase motor for mechanical translocation, unfolding, and Rpn11-mediated deubiquitination. These findings explain how modifications with poly-ubiquitin chains or multiple mono-ubiquitins allosterically promote substrate degradation and allow up to 4-fold faster turnover by the proteasome.
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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.