DUG1
S. cerevisiae
metallodipeptidase
What the model saw
Gene: DUG1 Organism: Saccharomyces cerevisiae Known functions: metallodipeptidase. hydrolase activity. identical protein binding. metallodipeptidase activity. omega peptidase activity. peptidase activity. zinc ion binding.
View unredacted entry
metallodipeptidase. hydrolase activity. identical protein binding. metallodipeptidase activity. omega peptidase activity. peptidase activity. zinc ion binding.
Solver output
DUG1 encodes a zinc-dependent metallodipeptidase with omega peptidase activity, which is a core component of the DUG (deficient in utilization of glutathione) pathway in S. cerevisiae. This pathway is responsible for glutathione degradation via an omega-peptidase mechanism, cleaving the gamma-glutamyl bond in glutathione and related peptides. Proper glutathione turnover is essential for maintaining intracellular redox homeostasis and proteostasis; dysregulation of glutathione metabolism leads to oxidative stress accumulation, a key driver of aging. By facilitating glutathione catabolism and recycling of constituent amino acids, DUG1 supports the cell's capacity to manage oxidative damage and maintain proteostatic balance. Loss of this function would impair glutathione flux and potentially disrupt sulfur amino acid recycling, which is linked to lifespan regulation in yeast.
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 predicted pro_longevity but the ground truth is anti_longevity. The model's reasoning about DUG1's role in glutathione degradation via the DUG pathway is partially correct in terms of biochemical function, but the model incorrectly inferred that this function supports longevity. In reality, DUG1 is anti-longevity, meaning its deletion or loss likely extends lifespan. The model's logic that glutathione catabolism supports redox homeostasis and thus promotes longevity is flawed - the actual evidence suggests DUG1 activity is detrimental to lifespan (anti-longevity). The model showed moderate confidence (0.65) in the wrong direction. The mechanistic reasoning about glutathione degradation is plausible but leads to the wrong conclusion about longevity influence.
Raw API responses
solver
{
"reasoning": "DUG1 encodes a zinc-dependent metallodipeptidase with omega peptidase activity, which is a core component of the DUG (deficient in utilization of glutathione) pathway in S. cerevisiae. This pathway is responsible for glutathione degradation via an omega-peptidase mechanism, cleaving the gamma-glutamyl bond in glutathione and related peptides. Proper glutathione turnover is essential for maintaining intracellular redox homeostasis and proteostasis; dysregulation of glutathione metabolism leads to oxidative stress accumulation, a key driver of aging. By facilitating glutathione catabolism and recycling of constituent amino acids, DUG1 supports the cell's capacity to manage oxidative damage and maintain proteostatic balance. Loss of this function would impair glutathione flux and potentially disrupt sulfur amino acid recycling, which is linked to lifespan regulation in yeast.",
"confidence": 0.65,
"key_pathways": [
"glutathione degradation (DUG pathway)",
"redox homeostasis",
"sulfur amino acid metabolism"
],
"mechanism_class": "loss_of_proteostasis",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted pro_longevity but the ground truth is anti_longevity. The model's reasoning about DUG1's role in glutathione degradation via the DUG pathway is partially correct in terms of biochemical function, but the model incorrectly inferred that this function supports longevity. In reality, DUG1 is anti-longevity, meaning its deletion or loss likely extends lifespan. The model's logic that glutathione catabolism supports redox homeostasis and thus promotes longevity is flawed - the actual evidence suggests DUG1 activity is detrimental to lifespan (anti-longevity). The model showed moderate confidence (0.65) in the wrong direction. The mechanistic reasoning about glutathione degradation is plausible but leads to the wrong conclusion about longevity influence.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}