Men
D. melanogaster
Malic enzyme
What the model saw
Gene: Men Organism: Drosophila melanogaster Known functions: Malic enzyme. malic enzyme. NAD binding. malate dehydrogenase (decarboxylating) (NADP+) activity. malic enzyme activity. oxidoreductase activity, acting on the CH-OH group of donors, NAD or NADP as acceptor.
View unredacted entry
Malic enzyme. malic enzyme. NAD binding. malate dehydrogenase (decarboxylating) (NADP+) activity. malic enzyme activity. oxidoreductase activity, acting on the CH-OH group of donors, NAD or NADP as acceptor.
Solver output
Malic enzyme (Men) catalyzes the oxidative decarboxylation of malate to pyruvate, generating NADPH (or NADH), which is a critical node linking the TCA cycle to cytosolic redox balance and lipid biosynthesis. NADPH production by malic enzyme is essential for maintaining the glutathione/thioredoxin antioxidant systems, thereby reducing oxidative stress — a key driver of aging. Additionally, malic enzyme activity connects mitochondrial metabolism (TCA cycle flux) to cytosolic anabolic pathways, influencing nutrient sensing and metabolic homeostasis. In Drosophila, proper malic enzyme function supports metabolic flexibility and energy balance, which are associated with healthy aging. Loss of this enzymatic activity would impair NADPH-dependent redox buffering and disrupt metabolic homeostasis, consistent with a pro-longevity role for the normal gene 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 predicted pro_longevity for the Men (Malic enzyme) gene in Drosophila melanogaster. The mechanistic reasoning is sound and biologically plausible: malic enzyme generates NADPH which supports antioxidant systems (glutathione/thioredoxin), and connects TCA cycle to cytosolic redox balance and lipid biosynthesis. The classification as "deregulated_nutrient_sensing" is somewhat imprecise — the primary mechanism is more about redox homeostasis and metabolic flux than nutrient sensing per se — but the overall reasoning is coherent and well-grounded. Confidence of 0.62 is appropriately moderate given the limited direct evidence cited. The reasoning quality is good but not exceptional, as it relies on general biochemical principles rather than specific Drosophila aging studies.
Raw API responses
solver
{
"reasoning": "Malic enzyme (Men) catalyzes the oxidative decarboxylation of malate to pyruvate, generating NADPH (or NADH), which is a critical node linking the TCA cycle to cytosolic redox balance and lipid biosynthesis. NADPH production by malic enzyme is essential for maintaining the glutathione/thioredoxin antioxidant systems, thereby reducing oxidative stress — a key driver of aging. Additionally, malic enzyme activity connects mitochondrial metabolism (TCA cycle flux) to cytosolic anabolic pathways, influencing nutrient sensing and metabolic homeostasis. In Drosophila, proper malic enzyme function supports metabolic flexibility and energy balance, which are associated with healthy aging. Loss of this enzymatic activity would impair NADPH-dependent redox buffering and disrupt metabolic homeostasis, consistent with a pro-longevity role for the normal gene function.",
"confidence": 0.62,
"key_pathways": [
"TCA cycle / malate-pyruvate shuttle",
"NADPH-dependent redox homeostasis (glutathione/thioredoxin systems)",
"Lipid biosynthesis and metabolic nutrient sensing"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity for the Men (Malic enzyme) gene in Drosophila melanogaster. The mechanistic reasoning is sound and biologically plausible: malic enzyme generates NADPH which supports antioxidant systems (glutathione/thioredoxin), and connects TCA cycle to cytosolic redox balance and lipid biosynthesis. The classification as \"deregulated_nutrient_sensing\" is somewhat imprecise — the primary mechanism is more about redox homeostasis and metabolic flux than nutrient sensing per se — but the overall reasoning is coherent and well-grounded. Confidence of 0.62 is appropriately moderate given the limited direct evidence cited. The reasoning quality is good but not exceptional, as it relies on general biochemical principles rather than specific Drosophila aging studies.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 4,
"ground_truth_questionable": false
}