pex8
S. pombe
protein Pex8
What the model saw
Gene: pex8 Organism: Schizosaccharomyces pombe Known functions: protein Pex8. protein-macromolecule adaptor activity.
View unredacted entry
protein Pex8. protein-macromolecule adaptor activity.
Solver output
Pex8 is a peroxisomal membrane protein that functions as a protein-macromolecule adaptor, playing a role in peroxisome biogenesis and the import of matrix proteins into peroxisomes. Functional peroxisomes are essential for fatty acid beta-oxidation, reactive oxygen species (ROS) detoxification (via catalase), and lipid metabolism. Loss of peroxisomal function leads to accumulation of toxic lipid intermediates and elevated oxidative stress, both of which are associated with accelerated aging. In yeast models, peroxisome integrity supports metabolic homeostasis and stress resistance, which are broadly pro-longevity. Therefore, the normal function of Pex8 in maintaining peroxisomal import competency is expected to promote longevity by sustaining organelle function and limiting oxidative damage.
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 follows a logical but incorrect path: it assumes that because peroxisomes are important for ROS detoxification and fatty acid metabolism, pex8 must be pro-longevity. However, in S. pombe, pex8 is actually anti-longevity, meaning its deletion or loss likely extends lifespan. The model failed to consider that peroxisomal activity could also promote aging (e.g., through ROS production during fatty acid oxidation, or other mechanisms). The reasoning is plausible but ultimately wrong, and the model showed moderate confidence (0.55) in the incorrect direction.
Raw API responses
solver
{
"reasoning": "Pex8 is a peroxisomal membrane protein that functions as a protein-macromolecule adaptor, playing a role in peroxisome biogenesis and the import of matrix proteins into peroxisomes. Functional peroxisomes are essential for fatty acid beta-oxidation, reactive oxygen species (ROS) detoxification (via catalase), and lipid metabolism. Loss of peroxisomal function leads to accumulation of toxic lipid intermediates and elevated oxidative stress, both of which are associated with accelerated aging. In yeast models, peroxisome integrity supports metabolic homeostasis and stress resistance, which are broadly pro-longevity. Therefore, the normal function of Pex8 in maintaining peroxisomal import competency is expected to promote longevity by sustaining organelle function and limiting oxidative damage.",
"confidence": 0.55,
"key_pathways": [
"peroxisome biogenesis",
"fatty acid beta-oxidation",
"ROS detoxification"
],
"mechanism_class": "other",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted pro_longevity but the ground truth is anti_longevity. The model's reasoning follows a logical but incorrect path: it assumes that because peroxisomes are important for ROS detoxification and fatty acid metabolism, pex8 must be pro-longevity. However, in S. pombe, pex8 is actually anti-longevity, meaning its deletion or loss likely extends lifespan. The model failed to consider that peroxisomal activity could also promote aging (e.g., through ROS production during fatty acid oxidation, or other mechanisms). The reasoning is plausible but ultimately wrong, and the model showed moderate confidence (0.55) in the incorrect direction.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}