Reference - Detail
| RRC ID | 88127 |
|---|---|
| Author | Salcedo-Tacuma D, Asad N, Islam MQ, Anderson R, Smith DM. |
| Title | Hyperactive 20S proteasome enhances proteostasis and ERAD in C. elegans via degradation of intrinsically disordered proteins. |
| Journal | Sci Adv |
| Abstract |
Age-related proteinopathies, including Alzheimer's and Parkinson's disease, are driven by toxic accumulation of misfolded and intrinsically disordered proteins (IDPs) that overwhelm cellular proteostasis. The proteasome clears these proteins, but its failure in disease remains unclear. We engineered a Caenorhabditis elegans model with a hyperactive 20S proteasome (α3ΔN) for selective 20S activation. α3ΔN markedly enhanced IDP and misfolded protein degradation, reduced oxidative damage, and improved endoplasmic reticulum-associated degradation (ERAD). Aggregation-prone substrates such as vitellogenins and human alpha-1 antitrypsin (ATZ) were efficiently cleared. Integrated proteomic and transcriptomic analyses reveal systemic adaptations featuring increased protein turnover and oxidative stress resistance independent of superoxide dismutases (SODs). Notably, α3ΔN extended life span and stress resistance independently of canonical unfolded protein response (UPR) signaling via xbp-1. These findings substantiate a "20S pathway" of proteostasis that directly alleviates protein aggregation and oxidative stress, offering a promising therapeutic angle for neurodegenerative diseases. |
| Volume | 11(41) |
| Pages | eadx3014 |
| Published | 2025-10-10 |
| DOI | 10.1126/sciadv.adx3014 |
| PMID | 41071871 |
| PMC | PMC12513426 |
| MeSH | Animals Caenorhabditis elegans* / genetics Caenorhabditis elegans* / metabolism Caenorhabditis elegans Proteins* / genetics Caenorhabditis elegans Proteins* / metabolism Endoplasmic Reticulum-Associated Degradation* Humans Intrinsically Disordered Proteins* / metabolism Oxidative Stress Proteasome Endopeptidase Complex* / genetics Proteasome Endopeptidase Complex* / metabolism Proteolysis Proteostasis* Unfolded Protein Response |
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| The most frequently cited source | X(Twitter) |
| Total number of mentions | 19 |
| Altmetric score changes over past 6months | 0.0 |
| Resource | |
| C.elegans | tm1146 tm783 tm760 |