frh-1
C. elegans
Frataxin, mitochondrial
What the model saw
Gene: frh-1 Organism: Caenorhabditis elegans Known functions: Frataxin, mitochondrial. 2 iron, 2 sulfur cluster binding. ferric iron binding. ferrous iron binding. ferroxidase activity. iron chaperone activity.
View unredacted entry
Frataxin, mitochondrial. 2 iron, 2 sulfur cluster binding. ferric iron binding. ferrous iron binding. ferroxidase activity. iron chaperone activity.
Solver output
Frataxin (frh-1) is a mitochondrial iron chaperone that binds ferric and ferrous iron, exhibits ferroxidase activity, and facilitates Fe-S cluster assembly. In mammals, frataxin loss causes Friedreich's ataxia via mitochondrial iron accumulation and oxidative damage. However, in C. elegans, frh-1 knockdown paradoxically extends lifespan, likely by triggering a mitohormetic response through mild mitochondrial stress and activation of stress-response pathways (e.g., UPRmt). This creates a genuine mechanistic conflict: the normal pro-mitochondrial function of frh-1 (supporting Fe-S cluster biogenesis and preventing iron-mediated ROS) would be expected to be pro-longevity, yet experimental evidence in C. elegans shows its reduction extends lifespan, suggesting the gene's normal activity is anti-longevity in this organism. The dual role of iron homeostasis in both enabling mitochondrial function and promoting oxidative stress makes a definitive directional call difficult.
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 "unclear" as the longevity influence, matching the ground truth. The reasoning is sophisticated and accurate: it correctly identifies the paradox that frh-1 knockdown extends lifespan in C. elegans (via mitohormesis/UPRmt) despite frataxin's normal pro-mitochondrial function, which creates genuine ambiguity about the directional classification. The mechanistic reasoning about Fe-S cluster biogenesis, iron homeostasis, and mitohormetic responses is well-grounded. The model appropriately expressed moderate confidence (0.45) given the genuine complexity. This is an excellent prediction with correct answer and correct mechanistic reasoning.
Raw API responses
solver
{
"reasoning": "Frataxin (frh-1) is a mitochondrial iron chaperone that binds ferric and ferrous iron, exhibits ferroxidase activity, and facilitates Fe-S cluster assembly. In mammals, frataxin loss causes Friedreich's ataxia via mitochondrial iron accumulation and oxidative damage. However, in C. elegans, frh-1 knockdown paradoxically extends lifespan, likely by triggering a mitohormetic response through mild mitochondrial stress and activation of stress-response pathways (e.g., UPRmt). This creates a genuine mechanistic conflict: the normal pro-mitochondrial function of frh-1 (supporting Fe-S cluster biogenesis and preventing iron-mediated ROS) would be expected to be pro-longevity, yet experimental evidence in C. elegans shows its reduction extends lifespan, suggesting the gene's normal activity is anti-longevity in this organism. The dual role of iron homeostasis in both enabling mitochondrial function and promoting oxidative stress makes a definitive directional call difficult.",
"confidence": 0.45,
"key_pathways": [
"Fe-S cluster biogenesis",
"mitochondrial iron homeostasis",
"mitohormesis / UPRmt"
],
"mechanism_class": "mitochondrial_dysfunction",
"longevity_influence": "unclear"
}advisor
{
"notes": "The model correctly predicted \"unclear\" as the longevity influence, matching the ground truth. The reasoning is sophisticated and accurate: it correctly identifies the paradox that frh-1 knockdown extends lifespan in C. elegans (via mitohormesis/UPRmt) despite frataxin's normal pro-mitochondrial function, which creates genuine ambiguity about the directional classification. The mechanistic reasoning about Fe-S cluster biogenesis, iron homeostasis, and mitohormetic responses is well-grounded. The model appropriately expressed moderate confidence (0.45) given the genuine complexity. This is an excellent prediction with correct answer and correct mechanistic reasoning.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 5,
"ground_truth_questionable": false
}