unc-13
C. elegans
Phorbol ester/diacylglycerol-binding protein unc-13;Protein kinase C
What the model saw
Gene: unc-13 Organism: Caenorhabditis elegans Known functions: Phorbol ester/diacylglycerol-binding protein unc-13;Protein kinase C. calcium ion binding. calmodulin binding. diacylglycerol binding. phospholipid binding.
View unredacted entry
Phorbol ester/diacylglycerol-binding protein unc-13;Protein kinase C. calcium ion binding. calmodulin binding. diacylglycerol binding. phospholipid binding.
Solver output
UNC-13 is a diacylglycerol (DAG) and phorbol ester-binding protein that acts as a key effector of DAG signaling at synapses, promoting neurotransmitter release by priming synaptic vesicles. DAG is a second messenger downstream of Gq/phospholipase C signaling; in C. elegans, elevated DAG/Gq signaling through UNC-13 promotes synaptic activity and is known to antagonize the longevity-promoting effects of reduced insulin/IGF-1 signaling and dietary restriction pathways. Specifically, DAG binding by UNC-13 activates PKC-like signaling cascades that stimulate feeding behavior and nutrient uptake, counteracting the pro-longevity effects of reduced nutrient sensing. Loss-of-function mutations in unc-13 or reduction of DAG signaling extend lifespan in C. elegans, consistent with UNC-13's normal function being anti-longevity. The calmodulin and calcium-binding activities further couple UNC-13 to neuronal activity that drives metabolic rate and nutrient consumption, reinforcing its role in promoting aging through deregulated nutrient sensing and neuroendocrine signaling.
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 predicts anti_longevity for unc-13. However, the mechanistic reasoning has issues. The model classifies the mechanism as "deregulated_nutrient_sensing," which is not the primary mechanism for UNC-13. UNC-13 is primarily a synaptic vesicle priming protein (a MUN/C2 domain protein) that regulates neurotransmitter release - its role in longevity is more accurately tied to neuroendocrine signaling and synaptic activity rather than nutrient sensing per se. The claim that "DAG binding by UNC-13 activates PKC-like signaling cascades that stimulate feeding behavior and nutrient uptake" is an oversimplification and somewhat inaccurate - UNC-13 itself is not a kinase and doesn't directly activate PKC cascades; it's a vesicle priming factor. The connection to "deregulated nutrient sensing" as the primary mechanism is a stretch. The core reasoning that loss-of-function of unc-13 extends lifespan through reduced DAG/Gq signaling is directionally correct, but the mechanistic classification and some specific claims are inaccurate or misleading.
Raw API responses
solver
{
"reasoning": "UNC-13 is a diacylglycerol (DAG) and phorbol ester-binding protein that acts as a key effector of DAG signaling at synapses, promoting neurotransmitter release by priming synaptic vesicles. DAG is a second messenger downstream of Gq/phospholipase C signaling; in C. elegans, elevated DAG/Gq signaling through UNC-13 promotes synaptic activity and is known to antagonize the longevity-promoting effects of reduced insulin/IGF-1 signaling and dietary restriction pathways. Specifically, DAG binding by UNC-13 activates PKC-like signaling cascades that stimulate feeding behavior and nutrient uptake, counteracting the pro-longevity effects of reduced nutrient sensing. Loss-of-function mutations in unc-13 or reduction of DAG signaling extend lifespan in C. elegans, consistent with UNC-13's normal function being anti-longevity. The calmodulin and calcium-binding activities further couple UNC-13 to neuronal activity that drives metabolic rate and nutrient consumption, reinforcing its role in promoting aging through deregulated nutrient sensing and neuroendocrine signaling.",
"confidence": 0.65,
"key_pathways": [
"DAG/PKC signaling",
"Gq-phospholipase C pathway",
"synaptic vesicle priming and neurotransmitter release"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "anti_longevity"
}advisor
{
"notes": "The model correctly predicts anti_longevity for unc-13. However, the mechanistic reasoning has issues. The model classifies the mechanism as \"deregulated_nutrient_sensing,\" which is not the primary mechanism for UNC-13. UNC-13 is primarily a synaptic vesicle priming protein (a MUN/C2 domain protein) that regulates neurotransmitter release - its role in longevity is more accurately tied to neuroendocrine signaling and synaptic activity rather than nutrient sensing per se. The claim that \"DAG binding by UNC-13 activates PKC-like signaling cascades that stimulate feeding behavior and nutrient uptake\" is an oversimplification and somewhat inaccurate - UNC-13 itself is not a kinase and doesn't directly activate PKC cascades; it's a vesicle priming factor. The connection to \"deregulated nutrient sensing\" as the primary mechanism is a stretch. The core reasoning that loss-of-function of unc-13 extends lifespan through reduced DAG/Gq signaling is directionally correct, but the mechanistic classification and some specific claims are inaccurate or misleading.",
"failure_mode": "right_answer_wrong_reasoning",
"answer_correct": true,
"mechanism_correct": false,
"reasoning_quality": 3,
"ground_truth_questionable": false
}