dagl-2
C. elegans
sn-1-specific diacylglycerol lipase
What the model saw
Gene: dagl-2 Organism: Caenorhabditis elegans Known functions: sn-1-specific diacylglycerol lipase. triacylglycerol lipase activity.
View unredacted entry
sn-1-specific diacylglycerol lipase. triacylglycerol lipase activity.
Solver output
dagl-2 encodes a diacylglycerol lipase with sn-1 specificity and triacylglycerol lipase activity, placing it in lipid catabolism pathways. In C. elegans, lipid metabolism is tightly coupled to nutrient-sensing pathways (insulin/IGF-1, mTOR, AMPK) that are central regulators of longevity. Diacylglycerol (DAG) is a key second messenger that activates protein kinase C (PKC/tpa-1) and promotes DAG-dependent signaling; by hydrolyzing DAG, dagl-2 would reduce PKC activation and potentially modulate downstream pro-aging signaling. Additionally, triacylglycerol lipase activity contributes to fat mobilization, which in C. elegans is linked to lifespan extension through fatty acid oxidation and reduced lipotoxicity. Reduced DAG levels can also attenuate mTORC1 signaling, a well-established anti-longevity pathway. The net effect of dagl-2 activity—lowering DAG and mobilizing stored fat—is therefore more consistent with a pro-longevity role, though the evidence is indirect.
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 dagl-2, but the mechanistic reasoning is speculative and indirect. The model constructs a plausible-sounding but largely hypothetical chain of reasoning (DAG → PKC → pro-aging signaling; TAG lipolysis → fat mobilization → lifespan extension; DAG → mTORC1 attenuation) without citing any direct experimental evidence for dagl-2's role in C. elegans longevity. The confidence is appropriately modest (0.55), but the reasoning reads as post-hoc rationalization rather than evidence-based mechanistic understanding. The mechanism_class of 'deregulated_nutrient_sensing' is also questionable for a lipase gene whose primary function is lipid catabolism rather than nutrient sensing per se. The correct answer was reached, but the reasoning quality is poor.
Raw API responses
solver
{
"reasoning": "dagl-2 encodes a diacylglycerol lipase with sn-1 specificity and triacylglycerol lipase activity, placing it in lipid catabolism pathways. In C. elegans, lipid metabolism is tightly coupled to nutrient-sensing pathways (insulin/IGF-1, mTOR, AMPK) that are central regulators of longevity. Diacylglycerol (DAG) is a key second messenger that activates protein kinase C (PKC/tpa-1) and promotes DAG-dependent signaling; by hydrolyzing DAG, dagl-2 would reduce PKC activation and potentially modulate downstream pro-aging signaling. Additionally, triacylglycerol lipase activity contributes to fat mobilization, which in C. elegans is linked to lifespan extension through fatty acid oxidation and reduced lipotoxicity. Reduced DAG levels can also attenuate mTORC1 signaling, a well-established anti-longevity pathway. The net effect of dagl-2 activity—lowering DAG and mobilizing stored fat—is therefore more consistent with a pro-longevity role, though the evidence is indirect.",
"confidence": 0.55,
"key_pathways": [
"diacylglycerol/PKC signaling",
"triacylglycerol lipolysis and fat mobilization",
"insulin/IGF-1 and mTOR nutrient-sensing"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity for dagl-2, but the mechanistic reasoning is speculative and indirect. The model constructs a plausible-sounding but largely hypothetical chain of reasoning (DAG → PKC → pro-aging signaling; TAG lipolysis → fat mobilization → lifespan extension; DAG → mTORC1 attenuation) without citing any direct experimental evidence for dagl-2's role in C. elegans longevity. The confidence is appropriately modest (0.55), but the reasoning reads as post-hoc rationalization rather than evidence-based mechanistic understanding. The mechanism_class of 'deregulated_nutrient_sensing' is also questionable for a lipase gene whose primary function is lipid catabolism rather than nutrient sensing per se. The correct answer was reached, but the reasoning quality is poor.",
"failure_mode": "right_answer_wrong_reasoning",
"answer_correct": true,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}