Stub1
M. musculus
STIP1 homology and U-Box containing protein 1
What the model saw
Gene: Stub1 Organism: Mus musculus Known functions: STIP1 homology and U-Box containing protein 1. E3 ubiquitin-protein ligase CHIP. G protein-coupled receptor binding. Hsp70 protein binding. Hsp90 protein binding. R-SMAD binding. SMAD binding. TPR domain binding. enzyme binding. heat shock protein binding. kinase binding. misfolded protein binding. protein binding. protein homodimerization activity. protein-folding chaperone binding. protein-macromolecule adaptor activity. ubiquitin protein ligase activity. ubiquitin protein ligase binding. ubiquitin-protein transferase activity. ubiquitin-ubiquitin ligase activity.
View unredacted entry
STIP1 homology and U-Box containing protein 1. E3 ubiquitin-protein ligase CHIP. G protein-coupled receptor binding. Hsp70 protein binding. Hsp90 protein binding. R-SMAD binding. SMAD binding. TPR domain binding. enzyme binding. heat shock protein binding. kinase binding. misfolded protein binding. protein binding. protein homodimerization activity. protein-folding chaperone binding. protein-macromolecule adaptor activity. ubiquitin protein ligase activity. ubiquitin protein ligase binding. ubiquitin-protein transferase activity. ubiquitin-ubiquitin ligase activity.
Solver output
STUB1/CHIP functions as a U-box E3 ubiquitin ligase that acts at the intersection of the chaperone and proteasomal degradation systems. By binding Hsp70 and Hsp90 via its TPR domain and ubiquitinating misfolded client proteins, CHIP directs damaged or aggregation-prone proteins for proteasomal clearance, directly maintaining proteostasis. Loss of CHIP in mice leads to accelerated aging phenotypes and accumulation of misfolded proteins, while its activity suppresses toxic protein aggregates associated with neurodegeneration and age-related disease. CHIP also ubiquitinates R-SMADs, modulating TGF-β signaling, and interacts with kinases and GPCRs, but its dominant aging-relevant role is as a quality-control E3 ligase coupling chaperone triage to proteasomal degradation. This function is a canonical pro-longevity mechanism, as robust proteostasis is essential for healthy aging and lifespan extension in multiple model organisms.
GenAge curators classify each gene's normal function as promoting (Pro-Longevity) or opposing (Anti-Longevity) longevity, based on synthesis across studies. Loss-of-function effects can vary from this depending on the manipulation.
Advisor judgment
The model correctly predicted pro_longevity for Stub1/CHIP in Mus musculus with high confidence (0.82). The mechanistic reasoning is excellent and accurate: CHIP functions as a U-box E3 ubiquitin ligase that bridges the chaperone system (Hsp70/Hsp90) with the ubiquitin-proteasome system to clear misfolded proteins. The model correctly notes that CHIP knockout mice show accelerated aging phenotypes, which is well-documented in the literature. The identification of proteostasis maintenance as the dominant aging-relevant mechanism is appropriate and well-supported. The reasoning about TGF-β/SMAD signaling as a secondary function is also accurate. Overall, this is a high-quality, well-reasoned prediction that matches the ground truth.
Raw API responses
solver
{
"reasoning": "STUB1/CHIP functions as a U-box E3 ubiquitin ligase that acts at the intersection of the chaperone and proteasomal degradation systems. By binding Hsp70 and Hsp90 via its TPR domain and ubiquitinating misfolded client proteins, CHIP directs damaged or aggregation-prone proteins for proteasomal clearance, directly maintaining proteostasis. Loss of CHIP in mice leads to accelerated aging phenotypes and accumulation of misfolded proteins, while its activity suppresses toxic protein aggregates associated with neurodegeneration and age-related disease. CHIP also ubiquitinates R-SMADs, modulating TGF-β signaling, and interacts with kinases and GPCRs, but its dominant aging-relevant role is as a quality-control E3 ligase coupling chaperone triage to proteasomal degradation. This function is a canonical pro-longevity mechanism, as robust proteostasis is essential for healthy aging and lifespan extension in multiple model organisms.",
"confidence": 0.82,
"key_pathways": [
"Hsp70/Hsp90 chaperone-assisted proteasomal degradation",
"ubiquitin-proteasome system (UPS) quality control",
"misfolded protein triage and clearance"
],
"mechanism_class": "loss_of_proteostasis",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity for Stub1/CHIP in Mus musculus with high confidence (0.82). The mechanistic reasoning is excellent and accurate: CHIP functions as a U-box E3 ubiquitin ligase that bridges the chaperone system (Hsp70/Hsp90) with the ubiquitin-proteasome system to clear misfolded proteins. The model correctly notes that CHIP knockout mice show accelerated aging phenotypes, which is well-documented in the literature. The identification of proteostasis maintenance as the dominant aging-relevant mechanism is appropriate and well-supported. The reasoning about TGF-β/SMAD signaling as a secondary function is also accurate. Overall, this is a high-quality, well-reasoned prediction that matches the ground truth.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 5,
"ground_truth_questionable": false
}