ZWF1
S. cerevisiae
glucose-6-phosphate dehydrogenase
What the model saw
Gene: ZWF1 Organism: Saccharomyces cerevisiae Known functions: glucose-6-phosphate dehydrogenase. NADP binding. glucose-6-phosphate dehydrogenase activity. oxidoreductase activity, acting on CH-OH group of donors.
View unredacted entry
glucose-6-phosphate dehydrogenase. NADP binding. glucose-6-phosphate dehydrogenase activity. oxidoreductase activity, acting on CH-OH group of donors.
Solver output
ZWF1 encodes glucose-6-phosphate dehydrogenase (G6PD), the rate-limiting enzyme of the pentose phosphate pathway (PPP). Its primary molecular function is to oxidize glucose-6-phosphate while reducing NADP+ to NADPH. NADPH is the principal cytosolic reductant used to regenerate glutathione (via glutathione reductase) and thioredoxin, which are essential for neutralizing reactive oxygen species (ROS). By maintaining the cellular NADPH pool, ZWF1 supports robust antioxidant defenses, directly counteracting oxidative damage—a major driver of aging in yeast. Consistent with this, G6PD overexpression extends lifespan in multiple model organisms, and loss of ZWF1 in yeast increases oxidative stress sensitivity and shortens chronological lifespan. The key pathway is the pentose phosphate pathway → NADPH production → glutathione/thioredoxin redox buffering.
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 about ZWF1/G6PD's role in NADPH production and antioxidant defense is generally accurate in a broad biological context, but it incorrectly applied this to yeast longevity. In S. cerevisiae, ZWF1 deletion has actually been shown to extend chronological lifespan, making it anti_longevity (its presence shortens lifespan). The model even incorrectly stated that "loss of ZWF1 in yeast increases oxidative stress sensitivity and shortens chronological lifespan," which is the opposite of what the GenAge database records. The model's mechanistic reasoning about G6PD's role in NADPH production is correct in general biochemistry, but the conclusion about its effect on yeast longevity is wrong. The model appears to have extrapolated from other organisms (e.g., Drosophila where G6PD overexpression extends lifespan) without correctly accounting for the yeast-specific data.
Raw API responses
solver
{
"reasoning": "ZWF1 encodes glucose-6-phosphate dehydrogenase (G6PD), the rate-limiting enzyme of the pentose phosphate pathway (PPP). Its primary molecular function is to oxidize glucose-6-phosphate while reducing NADP+ to NADPH. NADPH is the principal cytosolic reductant used to regenerate glutathione (via glutathione reductase) and thioredoxin, which are essential for neutralizing reactive oxygen species (ROS). By maintaining the cellular NADPH pool, ZWF1 supports robust antioxidant defenses, directly counteracting oxidative damage—a major driver of aging in yeast. Consistent with this, G6PD overexpression extends lifespan in multiple model organisms, and loss of ZWF1 in yeast increases oxidative stress sensitivity and shortens chronological lifespan. The key pathway is the pentose phosphate pathway → NADPH production → glutathione/thioredoxin redox buffering.",
"confidence": 0.82,
"key_pathways": [
"pentose phosphate pathway",
"NADPH-dependent antioxidant defense (glutathione/thioredoxin system)",
"oxidative stress response"
],
"mechanism_class": "other",
"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 about ZWF1/G6PD's role in NADPH production and antioxidant defense is generally accurate in a broad biological context, but it incorrectly applied this to yeast longevity. In S. cerevisiae, ZWF1 deletion has actually been shown to extend chronological lifespan, making it anti_longevity (its presence shortens lifespan). The model even incorrectly stated that \"loss of ZWF1 in yeast increases oxidative stress sensitivity and shortens chronological lifespan,\" which is the opposite of what the GenAge database records. The model's mechanistic reasoning about G6PD's role in NADPH production is correct in general biochemistry, but the conclusion about its effect on yeast longevity is wrong. The model appears to have extrapolated from other organisms (e.g., Drosophila where G6PD overexpression extends lifespan) without correctly accounting for the yeast-specific data.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}