Coq2
D. melanogaster
Coenzyme Q biosynthesis protein 2
What the model saw
Gene: Coq2 Organism: Drosophila melanogaster Known functions: Coenzyme Q biosynthesis protein 2. coenzyme Q biosynthesis protein 2. 4-hydroxybenzoate polyprenyltransferase activity. prenyltransferase activity. transferase activity, transferring alkyl or aryl (other than methyl) groups.
View unredacted entry
Coenzyme Q biosynthesis protein 2. coenzyme Q biosynthesis protein 2. 4-hydroxybenzoate polyprenyltransferase activity. prenyltransferase activity. transferase activity, transferring alkyl or aryl (other than methyl) groups.
Solver output
Coq2 encodes 4-hydroxybenzoate polyprenyltransferase, which catalyzes the first committed step in Coenzyme Q (ubiquinone) biosynthesis — the prenylation of 4-hydroxybenzoate. CoQ is an essential lipid-soluble electron carrier in the mitochondrial electron transport chain (Complex I/II to Complex III), and its normal function is required for efficient oxidative phosphorylation and ATP production. Additionally, CoQ acts as a potent lipid-soluble antioxidant, protecting mitochondrial membranes from oxidative damage. Loss of Coq2 function leads to CoQ deficiency, impaired mitochondrial respiration, increased reactive oxygen species, and reduced lifespan in multiple model organisms. Maintaining CoQ biosynthesis through Coq2 activity therefore supports mitochondrial integrity and opposes age-related mitochondrial dysfunction, a canonical hallmark of aging.
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" with high confidence (0.85), but the ground truth is "anti_longevity." The model's reasoning follows a logical but incorrect path: it assumes that because CoQ is essential for mitochondrial function and antioxidant defense, Coq2 must be pro-longevity. However, in Drosophila, Coq2 is classified as anti-longevity, meaning its activity actually reduces lifespan (or its reduction extends lifespan). This is consistent with findings in some organisms where reduced mitochondrial electron transport chain activity (including CoQ biosynthesis) can paradoxically extend lifespan, possibly through mitohormesis or reduced ROS production from a less active ETC. The model failed to consider this nuance and defaulted to the naive assumption that "essential mitochondrial gene = pro-longevity." The mechanistic reasoning is also incorrect because it doesn't account for the anti-longevity classification, which suggests that Coq2 activity shortens lifespan rather than extending it.
Raw API responses
solver
{
"reasoning": "Coq2 encodes 4-hydroxybenzoate polyprenyltransferase, which catalyzes the first committed step in Coenzyme Q (ubiquinone) biosynthesis — the prenylation of 4-hydroxybenzoate. CoQ is an essential lipid-soluble electron carrier in the mitochondrial electron transport chain (Complex I/II to Complex III), and its normal function is required for efficient oxidative phosphorylation and ATP production. Additionally, CoQ acts as a potent lipid-soluble antioxidant, protecting mitochondrial membranes from oxidative damage. Loss of Coq2 function leads to CoQ deficiency, impaired mitochondrial respiration, increased reactive oxygen species, and reduced lifespan in multiple model organisms. Maintaining CoQ biosynthesis through Coq2 activity therefore supports mitochondrial integrity and opposes age-related mitochondrial dysfunction, a canonical hallmark of aging.",
"confidence": 0.85,
"key_pathways": [
"Coenzyme Q biosynthesis pathway",
"Mitochondrial electron transport chain",
"Mitochondrial antioxidant defense"
],
"mechanism_class": "mitochondrial_dysfunction",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted \"pro_longevity\" with high confidence (0.85), but the ground truth is \"anti_longevity.\" The model's reasoning follows a logical but incorrect path: it assumes that because CoQ is essential for mitochondrial function and antioxidant defense, Coq2 must be pro-longevity. However, in Drosophila, Coq2 is classified as anti-longevity, meaning its activity actually reduces lifespan (or its reduction extends lifespan). This is consistent with findings in some organisms where reduced mitochondrial electron transport chain activity (including CoQ biosynthesis) can paradoxically extend lifespan, possibly through mitohormesis or reduced ROS production from a less active ETC. The model failed to consider this nuance and defaulted to the naive assumption that \"essential mitochondrial gene = pro-longevity.\" The mechanistic reasoning is also incorrect because it doesn't account for the anti-longevity classification, which suggests that Coq2 activity shortens lifespan rather than extending it.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}