kat-1
C. elegans
Acetyl-CoA acetyltransferase homolog, mitochondrial
What the model saw
Gene: kat-1 Organism: Caenorhabditis elegans Known functions: Acetyl-CoA acetyltransferase homolog, mitochondrial. acetyl-CoA C-acetyltransferase activity. acyltransferase activity. acyltransferase activity, transferring groups other than amino-acyl groups.
View unredacted entry
Acetyl-CoA acetyltransferase homolog, mitochondrial. acetyl-CoA C-acetyltransferase activity. acyltransferase activity. acyltransferase activity, transferring groups other than amino-acyl groups.
Solver output
KAT-1 is a mitochondrial acetyl-CoA acetyltransferase (thiolase), which catalyzes the final step of mitochondrial fatty acid β-oxidation and the first step of ketogenesis, condensing two acetyl-CoA molecules into acetoacetyl-CoA. This enzyme is central to mitochondrial acetyl-CoA metabolism and energy homeostasis. In C. elegans, proper mitochondrial fatty acid oxidation and acetyl-CoA flux are critical for maintaining mitochondrial function and supporting metabolic efficiency during dietary restriction and stress, conditions known to extend lifespan. Adequate acetyl-CoA acetyltransferase activity supports TCA cycle fueling and reduces lipotoxic acyl-CoA accumulation, thereby preserving mitochondrial integrity. Loss of this function would impair mitochondrial energy metabolism, consistent with a pro-longevity role for its normal activity in sustaining healthy mitochondrial function.
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 pro_longevity for kat-1. However, the mechanistic reasoning is flawed. The model assumes that kat-1's pro-longevity role comes from its normal activity supporting mitochondrial function and energy homeostasis. In reality, research on kat-1 in C. elegans shows that its knockdown/loss actually extends lifespan - meaning reduced kat-1 activity is pro-longevity, not the presence of normal activity. The model's reasoning that "loss of this function would impair mitochondrial energy metabolism, consistent with a pro-longevity role for its normal activity" is backwards from the actual mechanism. The actual pro-longevity effect of kat-1 perturbation is likely through metabolic reprogramming (e.g., increased acetyl-CoA availability for other pathways, or activation of stress response pathways) rather than through maintaining normal mitochondrial function. The model gets the right answer but for the wrong reasons, and with a somewhat confused mechanistic narrative.
Raw API responses
solver
{
"reasoning": "KAT-1 is a mitochondrial acetyl-CoA acetyltransferase (thiolase), which catalyzes the final step of mitochondrial fatty acid β-oxidation and the first step of ketogenesis, condensing two acetyl-CoA molecules into acetoacetyl-CoA. This enzyme is central to mitochondrial acetyl-CoA metabolism and energy homeostasis. In C. elegans, proper mitochondrial fatty acid oxidation and acetyl-CoA flux are critical for maintaining mitochondrial function and supporting metabolic efficiency during dietary restriction and stress, conditions known to extend lifespan. Adequate acetyl-CoA acetyltransferase activity supports TCA cycle fueling and reduces lipotoxic acyl-CoA accumulation, thereby preserving mitochondrial integrity. Loss of this function would impair mitochondrial energy metabolism, consistent with a pro-longevity role for its normal activity in sustaining healthy mitochondrial function.",
"confidence": 0.68,
"key_pathways": [
"mitochondrial fatty acid beta-oxidation",
"acetyl-CoA metabolism / TCA cycle fueling",
"ketogenesis / acetoacetyl-CoA biosynthesis"
],
"mechanism_class": "mitochondrial_dysfunction",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicts pro_longevity for kat-1. However, the mechanistic reasoning is flawed. The model assumes that kat-1's pro-longevity role comes from its normal activity supporting mitochondrial function and energy homeostasis. In reality, research on kat-1 in C. elegans shows that its knockdown/loss actually extends lifespan - meaning reduced kat-1 activity is pro-longevity, not the presence of normal activity. The model's reasoning that \"loss of this function would impair mitochondrial energy metabolism, consistent with a pro-longevity role for its normal activity\" is backwards from the actual mechanism. The actual pro-longevity effect of kat-1 perturbation is likely through metabolic reprogramming (e.g., increased acetyl-CoA availability for other pathways, or activation of stress response pathways) rather than through maintaining normal mitochondrial function. The model gets the right answer but for the wrong reasons, and with a somewhat confused mechanistic narrative.",
"failure_mode": "right_answer_wrong_reasoning",
"answer_correct": true,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}