b0250.5
C. elegans
putative 3-hydroxyisobutyrate dehydrogenase, mitochondrial
What the model saw
Gene: B0250.5 Organism: Caenorhabditis elegans Known functions: putative 3-hydroxyisobutyrate dehydrogenase, mitochondrial. 3-hydroxyisobutyrate dehydrogenase activity. NAD binding. NADP binding. oxidoreductase activity.
View unredacted entry
putative 3-hydroxyisobutyrate dehydrogenase, mitochondrial. 3-hydroxyisobutyrate dehydrogenase activity. NAD binding. NADP binding. oxidoreductase activity.
Solver output
B0250.5 encodes a putative mitochondrial 3-hydroxyisobutyrate dehydrogenase (HIBADH), which catalyzes the NAD(P)+-dependent oxidation of 3-hydroxyisobutyrate to methylmalonate semialdehyde, a key step in the valine catabolic pathway. This enzyme resides in the mitochondrial matrix and contributes to branched-chain amino acid (BCAA) catabolism, feeding carbons into the TCA cycle. While mitochondrial metabolic efficiency is broadly pro-longevity, BCAA catabolism has complex effects: excessive BCAA oxidation can deplete TCA intermediates and impair mitochondrial function, whereas reduced BCAA catabolism can activate mTORC1 signaling (anti-longevity). The dual NAD/NADP cofactor usage also makes it difficult to assign a clear directional effect on redox balance and longevity. Given these opposing potential consequences, the net influence on longevity is genuinely unclear without loss-of-function or overexpression lifespan data.
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 predicted "unclear" while the ground truth is "anti_longevity." The model's reasoning about BCAA catabolism and mitochondrial function is plausible in general terms but fails to arrive at the correct directional conclusion. The model hedged excessively by citing opposing potential consequences without committing to a direction, when the actual evidence supports an anti-longevity classification. The mechanistic reasoning about mTORC1 activation from reduced BCAA catabolism is somewhat backwards for this gene (which is involved in BCAA catabolism, not its inhibition). The model's confidence of 0.42 reflects appropriate uncertainty, but the prediction is still wrong. The reasoning quality is low because it doesn't correctly identify the anti-longevity role, and the mechanistic framework, while partially relevant, doesn't lead to the correct conclusion.
Raw API responses
solver
{
"reasoning": "B0250.5 encodes a putative mitochondrial 3-hydroxyisobutyrate dehydrogenase (HIBADH), which catalyzes the NAD(P)+-dependent oxidation of 3-hydroxyisobutyrate to methylmalonate semialdehyde, a key step in the valine catabolic pathway. This enzyme resides in the mitochondrial matrix and contributes to branched-chain amino acid (BCAA) catabolism, feeding carbons into the TCA cycle. While mitochondrial metabolic efficiency is broadly pro-longevity, BCAA catabolism has complex effects: excessive BCAA oxidation can deplete TCA intermediates and impair mitochondrial function, whereas reduced BCAA catabolism can activate mTORC1 signaling (anti-longevity). The dual NAD/NADP cofactor usage also makes it difficult to assign a clear directional effect on redox balance and longevity. Given these opposing potential consequences, the net influence on longevity is genuinely unclear without loss-of-function or overexpression lifespan data.",
"confidence": 0.42,
"key_pathways": [
"valine/branched-chain amino acid catabolism",
"mitochondrial TCA cycle anaplerosis",
"NAD(P)+ redox metabolism"
],
"mechanism_class": "mitochondrial_dysfunction",
"longevity_influence": "unclear"
}advisor
{
"notes": "The model predicted \"unclear\" while the ground truth is \"anti_longevity.\" The model's reasoning about BCAA catabolism and mitochondrial function is plausible in general terms but fails to arrive at the correct directional conclusion. The model hedged excessively by citing opposing potential consequences without committing to a direction, when the actual evidence supports an anti-longevity classification. The mechanistic reasoning about mTORC1 activation from reduced BCAA catabolism is somewhat backwards for this gene (which is involved in BCAA catabolism, not its inhibition). The model's confidence of 0.42 reflects appropriate uncertainty, but the prediction is still wrong. The reasoning quality is low because it doesn't correctly identify the anti-longevity role, and the mechanistic framework, while partially relevant, doesn't lead to the correct conclusion.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}