frp2
S. pombe
ferric-chelate reductase Frp2
What the model saw
Gene: frp2 Organism: Schizosaccharomyces pombe Known functions: ferric-chelate reductase Frp2. ferric-chelate reductase (NADPH) activity. ferric-chelate reductase activity. flavin adenine dinucleotide binding. iron ion binding. oxidoreductase activity. oxidoreductase activity, acting on metal ions.
View unredacted entry
ferric-chelate reductase Frp2. ferric-chelate reductase (NADPH) activity. ferric-chelate reductase activity. flavin adenine dinucleotide binding. iron ion binding. oxidoreductase activity. oxidoreductase activity, acting on metal ions.
Solver output
Frp2 is a ferric-chelate reductase that reduces Fe³⁺ to Fe²⁺ using NADPH as electron donor and FAD as cofactor, facilitating iron acquisition and homeostasis in S. pombe. Proper iron homeostasis is critical for mitochondrial function, as iron is an essential cofactor for the electron transport chain complexes and iron-sulfur cluster proteins. By ensuring adequate bioavailable iron, frp2 supports mitochondrial respiratory capacity and reduces the risk of iron-deficiency-induced mitochondrial dysfunction. Additionally, controlled ferric reduction prevents the accumulation of excess free Fe²⁺, which would otherwise drive Fenton chemistry and generate damaging reactive oxygen species — a key driver of oxidative stress-associated aging. Thus, frp2's role in balancing iron redox state supports both mitochondrial integrity and protection against oxidative damage, both of which are pro-longevity.
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 pro_longevity but the ground truth is anti_longevity. The model's reasoning is plausible on the surface (iron homeostasis supporting mitochondrial function), but it gets the direction wrong. In reality, frp2 as a ferric-chelate reductase that converts Fe³⁺ to Fe²⁺ would increase free Fe²⁺ availability, which can actually promote Fenton chemistry and oxidative damage — the opposite of what the model claims. The model contradicts itself by saying "controlled ferric reduction prevents the accumulation of excess free Fe²⁺" when in fact the enzyme produces Fe²⁺. The anti-longevity classification likely reflects that excess iron reduction/availability promotes oxidative stress and accelerates aging. The model's mechanistic reasoning is internally inconsistent and reaches the wrong conclusion with moderate confidence (0.62).
Raw API responses
solver
{
"reasoning": "Frp2 is a ferric-chelate reductase that reduces Fe³⁺ to Fe²⁺ using NADPH as electron donor and FAD as cofactor, facilitating iron acquisition and homeostasis in S. pombe. Proper iron homeostasis is critical for mitochondrial function, as iron is an essential cofactor for the electron transport chain complexes and iron-sulfur cluster proteins. By ensuring adequate bioavailable iron, frp2 supports mitochondrial respiratory capacity and reduces the risk of iron-deficiency-induced mitochondrial dysfunction. Additionally, controlled ferric reduction prevents the accumulation of excess free Fe²⁺, which would otherwise drive Fenton chemistry and generate damaging reactive oxygen species — a key driver of oxidative stress-associated aging. Thus, frp2's role in balancing iron redox state supports both mitochondrial integrity and protection against oxidative damage, both of which are pro-longevity.",
"confidence": 0.62,
"key_pathways": [
"iron homeostasis and acquisition",
"mitochondrial electron transport chain support",
"reactive oxygen species prevention via iron redox balance"
],
"mechanism_class": "mitochondrial_dysfunction",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted pro_longevity but the ground truth is anti_longevity. The model's reasoning is plausible on the surface (iron homeostasis supporting mitochondrial function), but it gets the direction wrong. In reality, frp2 as a ferric-chelate reductase that converts Fe³⁺ to Fe²⁺ would increase free Fe²⁺ availability, which can actually promote Fenton chemistry and oxidative damage — the opposite of what the model claims. The model contradicts itself by saying \"controlled ferric reduction prevents the accumulation of excess free Fe²⁺\" when in fact the enzyme produces Fe²⁺. The anti-longevity classification likely reflects that excess iron reduction/availability promotes oxidative stress and accelerates aging. The model's mechanistic reasoning is internally inconsistent and reaches the wrong conclusion with moderate confidence (0.62).",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}