Glys
D. melanogaster
Glycogen synthase
What the model saw
Gene: Glys Organism: Drosophila melanogaster Known functions: Glycogen synthase. glycogen synthase. alpha-1,4-glucan glucosyltransferase (UDP-glucose donor) activity.
View unredacted entry
Glycogen synthase. glycogen synthase. alpha-1,4-glucan glucosyltransferase (UDP-glucose donor) activity.
Solver output
Glycogen synthase (Glys) catalyzes the rate-limiting step of glycogen biosynthesis, transferring glucose from UDP-glucose onto growing glycogen chains via alpha-1,4-glucosidic bonds. Elevated glycogen synthase activity promotes glycogen accumulation, which is downstream of and reinforces insulin/IGF-1 signaling (IIS) — a central nutrient-sensing pathway where reduced activity is well-established to extend lifespan in Drosophila and other organisms. Overactive glycogen synthesis reflects heightened anabolic/nutrient-sensing flux, analogous to increased TOR and insulin signaling, which are pro-aging. In Drosophila, excess glycogen storage has been linked to metabolic dysfunction and reduced stress resistance. Thus, the normal (or elevated) function of Glys opposes longevity by sustaining high IIS/TOR-driven anabolic metabolism rather than the nutrient-restricted state that promotes 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 correctly predicted anti_longevity for Glys. The mechanistic reasoning is plausible — glycogen synthase promotes glycogen accumulation downstream of insulin/IGF-1 signaling, and excess glycogen storage is associated with metabolic dysfunction. However, the reasoning is somewhat speculative and indirect. The model frames it as "overactive glycogen synthesis reflects heightened anabolic/nutrient-sensing flux," which is a reasonable but not strongly evidence-based argument. The model doesn't cite specific Drosophila studies showing Glys loss-of-function extends lifespan or overexpression shortens it. The confidence of 0.65 is appropriately moderate. Overall, the answer is correct with reasonable but not highly specific mechanistic reasoning.
Raw API responses
solver
{
"reasoning": "Glycogen synthase (Glys) catalyzes the rate-limiting step of glycogen biosynthesis, transferring glucose from UDP-glucose onto growing glycogen chains via alpha-1,4-glucosidic bonds. Elevated glycogen synthase activity promotes glycogen accumulation, which is downstream of and reinforces insulin/IGF-1 signaling (IIS) — a central nutrient-sensing pathway where reduced activity is well-established to extend lifespan in Drosophila and other organisms. Overactive glycogen synthesis reflects heightened anabolic/nutrient-sensing flux, analogous to increased TOR and insulin signaling, which are pro-aging. In Drosophila, excess glycogen storage has been linked to metabolic dysfunction and reduced stress resistance. Thus, the normal (or elevated) function of Glys opposes longevity by sustaining high IIS/TOR-driven anabolic metabolism rather than the nutrient-restricted state that promotes longevity.",
"confidence": 0.65,
"key_pathways": [
"insulin/IGF-1 signaling (IIS)",
"glycogen metabolism",
"TOR nutrient-sensing pathway"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "anti_longevity"
}advisor
{
"notes": "The model correctly predicted anti_longevity for Glys. The mechanistic reasoning is plausible — glycogen synthase promotes glycogen accumulation downstream of insulin/IGF-1 signaling, and excess glycogen storage is associated with metabolic dysfunction. However, the reasoning is somewhat speculative and indirect. The model frames it as \"overactive glycogen synthesis reflects heightened anabolic/nutrient-sensing flux,\" which is a reasonable but not strongly evidence-based argument. The model doesn't cite specific Drosophila studies showing Glys loss-of-function extends lifespan or overexpression shortens it. The confidence of 0.65 is appropriately moderate. Overall, the answer is correct with reasonable but not highly specific mechanistic reasoning.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 3,
"ground_truth_questionable": false
}