dhs-21
C. elegans
L-xylulose reductase
What the model saw
Gene: dhs-21 Organism: Caenorhabditis elegans Known functions: L-xylulose reductase. L-xylulose reductase (NADPH) activity. carbonyl reductase (NADPH) activity. catalytic activity. oxidoreductase activity, acting on the CH-OH group of donors, NAD or NADP as acceptor.
View unredacted entry
L-xylulose reductase. L-xylulose reductase (NADPH) activity. carbonyl reductase (NADPH) activity. catalytic activity. oxidoreductase activity, acting on the CH-OH group of donors, NAD or NADP as acceptor.
Solver output
dhs-21 encodes an NADPH-dependent carbonyl/L-xylulose reductase, a short-chain dehydrogenase/reductase (SDR) family enzyme. NADPH-dependent carbonyl reductases detoxify reactive carbonyl species (RCS) generated by lipid peroxidation and glycation, which are major sources of oxidative damage during aging. By reducing cytotoxic aldehydes and ketones, dhs-21 activity would protect macromolecules from carbonyl stress, a process closely linked to proteostasis and mitochondrial integrity. In C. elegans, several SDR-family dehydrogenases have been shown to modulate lifespan through redox homeostasis and detoxification pathways. The NADPH cofactor dependence also connects this enzyme to the pentose phosphate pathway and cellular antioxidant capacity, both of which are associated with longevity. Loss of such detoxification activity would be expected to accelerate damage accumulation, suggesting the normal function is pro-longevity.
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 dhs-21. The mechanistic reasoning is plausible and internally consistent - connecting NADPH-dependent carbonyl reductase activity to detoxification of reactive carbonyl species and oxidative stress protection, which are reasonable longevity mechanisms. However, the reasoning is somewhat generic (applying broadly to any SDR family enzyme) rather than being specific to dhs-21's known biology. The confidence is appropriately modest at 0.52, reflecting genuine uncertainty. The reasoning quality is moderate - correct direction but not particularly specific or well-evidenced.
Raw API responses
solver
{
"reasoning": "dhs-21 encodes an NADPH-dependent carbonyl/L-xylulose reductase, a short-chain dehydrogenase/reductase (SDR) family enzyme. NADPH-dependent carbonyl reductases detoxify reactive carbonyl species (RCS) generated by lipid peroxidation and glycation, which are major sources of oxidative damage during aging. By reducing cytotoxic aldehydes and ketones, dhs-21 activity would protect macromolecules from carbonyl stress, a process closely linked to proteostasis and mitochondrial integrity. In C. elegans, several SDR-family dehydrogenases have been shown to modulate lifespan through redox homeostasis and detoxification pathways. The NADPH cofactor dependence also connects this enzyme to the pentose phosphate pathway and cellular antioxidant capacity, both of which are associated with longevity. Loss of such detoxification activity would be expected to accelerate damage accumulation, suggesting the normal function is pro-longevity.",
"confidence": 0.52,
"key_pathways": [
"NADPH-dependent carbonyl detoxification / reactive carbonyl species reduction",
"Pentose phosphate pathway / NADPH redox homeostasis",
"Short-chain dehydrogenase/reductase (SDR) oxidoreductase activity"
],
"mechanism_class": "other",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity for dhs-21. The mechanistic reasoning is plausible and internally consistent - connecting NADPH-dependent carbonyl reductase activity to detoxification of reactive carbonyl species and oxidative stress protection, which are reasonable longevity mechanisms. However, the reasoning is somewhat generic (applying broadly to any SDR family enzyme) rather than being specific to dhs-21's known biology. The confidence is appropriately modest at 0.52, reflecting genuine uncertainty. The reasoning quality is moderate - correct direction but not particularly specific or well-evidenced.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 3,
"ground_truth_questionable": false
}