Nmdmc
D. melanogaster
NAD-dependent methylenetetrahydrofolate dehydrogenase
What the model saw
Gene: Nmdmc Organism: Drosophila melanogaster Known functions: NAD-dependent methylenetetrahydrofolate dehydrogenase. catalytic activity. magnesium ion binding. methenyltetrahydrofolate cyclohydrolase activity. methylenetetrahydrofolate dehydrogenase (NAD+) activity. methylenetetrahydrofolate dehydrogenase (NADP+) activity. phosphate ion binding.
View unredacted entry
NAD-dependent methylenetetrahydrofolate dehydrogenase. catalytic activity. magnesium ion binding. methenyltetrahydrofolate cyclohydrolase activity. methylenetetrahydrofolate dehydrogenase (NAD+) activity. methylenetetrahydrofolate dehydrogenase (NADP+) activity. phosphate ion binding.
Solver output
Nmdmc encodes a bifunctional NAD(P)-dependent methylenetetrahydrofolate dehydrogenase/methenyltetrahydrofolate cyclohydrolase, a key enzyme in mitochondrial one-carbon (1C) folate metabolism. This enzyme interconverts folate intermediates (5,10-methyleneTHF ↔ 5,10-methenylTHF) that are central to the supply of methyl groups for SAM-dependent methylation reactions, including DNA and histone methylation. Adequate flux through the mitochondrial folate cycle supports epigenetic maintenance and genome stability, both of which are critical for longevity. Additionally, 1C metabolism feeds into nucleotide biosynthesis and redox balance (NADH/NADPH generation), supporting mitochondrial function and reducing oxidative stress. Loss of this enzyme in Drosophila has been shown to reduce lifespan, consistent with a pro-longevity role for its normal 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 Nmdmc. However, the primary mechanism classification as "epigenetic_alterations" is questionable. While the model does mention multiple pathways (1C metabolism, nucleotide biosynthesis, redox homeostasis), it leads with epigenetic/methylation effects as the primary mechanism. The more direct and well-established role of Nmdmc is in mitochondrial one-carbon folate metabolism supporting nucleotide biosynthesis and mitochondrial function, rather than primarily epigenetic regulation. The model's reasoning is plausible but somewhat speculative in emphasizing epigenetic mechanisms over the more direct metabolic roles. The reasoning is partially correct (mentions the right pathways) but misclassifies the primary mechanism. The confidence of 0.72 is reasonable for this prediction.
Raw API responses
solver
{
"reasoning": "Nmdmc encodes a bifunctional NAD(P)-dependent methylenetetrahydrofolate dehydrogenase/methenyltetrahydrofolate cyclohydrolase, a key enzyme in mitochondrial one-carbon (1C) folate metabolism. This enzyme interconverts folate intermediates (5,10-methyleneTHF ↔ 5,10-methenylTHF) that are central to the supply of methyl groups for SAM-dependent methylation reactions, including DNA and histone methylation. Adequate flux through the mitochondrial folate cycle supports epigenetic maintenance and genome stability, both of which are critical for longevity. Additionally, 1C metabolism feeds into nucleotide biosynthesis and redox balance (NADH/NADPH generation), supporting mitochondrial function and reducing oxidative stress. Loss of this enzyme in Drosophila has been shown to reduce lifespan, consistent with a pro-longevity role for its normal function.",
"confidence": 0.72,
"key_pathways": [
"mitochondrial one-carbon folate metabolism",
"SAM-dependent methylation / epigenetic regulation",
"nucleotide biosynthesis and redox homeostasis"
],
"mechanism_class": "epigenetic_alterations",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicts pro_longevity for Nmdmc. However, the primary mechanism classification as \"epigenetic_alterations\" is questionable. While the model does mention multiple pathways (1C metabolism, nucleotide biosynthesis, redox homeostasis), it leads with epigenetic/methylation effects as the primary mechanism. The more direct and well-established role of Nmdmc is in mitochondrial one-carbon folate metabolism supporting nucleotide biosynthesis and mitochondrial function, rather than primarily epigenetic regulation. The model's reasoning is plausible but somewhat speculative in emphasizing epigenetic mechanisms over the more direct metabolic roles. The reasoning is partially correct (mentions the right pathways) but misclassifies the primary mechanism. The confidence of 0.72 is reasonable for this prediction.",
"failure_mode": "right_answer_wrong_reasoning",
"answer_correct": true,
"mechanism_correct": false,
"reasoning_quality": 3,
"ground_truth_questionable": false
}