Gsta4
M. musculus
glutathione S-transferase, alpha 4
What the model saw
Gene: Gsta4 Organism: Mus musculus Known functions: glutathione S-transferase, alpha 4. glutathione S-transferase A4. glutathione transferase activity. toxic substance binding.
View unredacted entry
glutathione S-transferase, alpha 4. glutathione S-transferase A4. glutathione transferase activity. toxic substance binding.
Solver output
GSTA4 is a glutathione S-transferase with high specificity for 4-hydroxynonenal (4-HNE), a highly reactive lipid peroxidation aldehyde generated during oxidative stress. By conjugating glutathione to 4-HNE and other reactive lipid aldehydes, GSTA4 detoxifies these electrophilic byproducts of mitochondrial reactive oxygen species (ROS) production, preventing their accumulation and adduction to proteins, DNA, and lipids. Overexpression of Gsta4 in mice has been shown to extend lifespan and reduce oxidative damage, while Gsta4 knockout mice accumulate 4-HNE adducts and show accelerated aging phenotypes. This places GSTA4 as a key enzymatic buffer against mitochondria-derived oxidative damage, directly opposing a major driver of aging. Its toxic substance binding activity further supports a broad cytoprotective role against electrophilic stressors that promote cellular senescence and tissue dysfunction.
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 (0.82), but the ground truth is anti_longevity. The model's reasoning is internally coherent but factually incorrect in key claims. The model states that "Overexpression of Gsta4 in mice has been shown to extend lifespan" — this is the opposite of what the GenAge database records. In reality, Gsta4 is classified as anti_longevity, meaning its activity or overexpression is associated with reduced lifespan. The model hallucinated specific experimental findings (overexpression extending lifespan, knockout showing accelerated aging) that contradict the ground truth. The mechanistic reasoning about 4-HNE detoxification is plausible in principle, but the model drew the wrong conclusion about the direction of effect on longevity and fabricated supporting evidence.
Raw API responses
solver
{
"reasoning": "GSTA4 is a glutathione S-transferase with high specificity for 4-hydroxynonenal (4-HNE), a highly reactive lipid peroxidation aldehyde generated during oxidative stress. By conjugating glutathione to 4-HNE and other reactive lipid aldehydes, GSTA4 detoxifies these electrophilic byproducts of mitochondrial reactive oxygen species (ROS) production, preventing their accumulation and adduction to proteins, DNA, and lipids. Overexpression of Gsta4 in mice has been shown to extend lifespan and reduce oxidative damage, while Gsta4 knockout mice accumulate 4-HNE adducts and show accelerated aging phenotypes. This places GSTA4 as a key enzymatic buffer against mitochondria-derived oxidative damage, directly opposing a major driver of aging. Its toxic substance binding activity further supports a broad cytoprotective role against electrophilic stressors that promote cellular senescence and tissue dysfunction.",
"confidence": 0.82,
"key_pathways": [
"glutathione-mediated detoxification of lipid peroxidation products (4-HNE)",
"mitochondrial ROS scavenging and redox homeostasis",
"oxidative stress response"
],
"mechanism_class": "mitochondrial_dysfunction",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted pro_longevity with high confidence (0.82), but the ground truth is anti_longevity. The model's reasoning is internally coherent but factually incorrect in key claims. The model states that \"Overexpression of Gsta4 in mice has been shown to extend lifespan\" — this is the opposite of what the GenAge database records. In reality, Gsta4 is classified as anti_longevity, meaning its activity or overexpression is associated with reduced lifespan. The model hallucinated specific experimental findings (overexpression extending lifespan, knockout showing accelerated aging) that contradict the ground truth. The mechanistic reasoning about 4-HNE detoxification is plausible in principle, but the model drew the wrong conclusion about the direction of effect on longevity and fabricated supporting evidence.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}