sun
D. melanogaster
stunted
What the model saw
Gene: sun Organism: Drosophila melanogaster Known functions: stunted. G protein-coupled receptor binding. protein binding. proton-transporting ATP synthase activity, rotational mechanism.
View unredacted entry
stunted. G protein-coupled receptor binding. protein binding. proton-transporting ATP synthase activity, rotational mechanism.
Solver output
The *sun* (stunted) gene encodes a subunit of the mitochondrial ATP synthase (Complex V) with proton-transporting ATPase activity via a rotational mechanism, which is central to oxidative phosphorylation and mitochondrial energy production. Proper ATP synthase function is essential for maintaining mitochondrial membrane potential and efficient ATP generation; loss of this activity leads to mitochondrial dysfunction, a hallmark of aging. Additionally, Stunted has been shown to act as a ligand for the GPCR Methuselah (Mth) — its GPCR binding function links it to the Methuselah signaling pathway, where reduced Mth signaling is associated with extended lifespan in Drosophila. The dual role of sun — supporting mitochondrial ATP synthesis and modulating the pro-aging Mth/GPCR pathway — suggests its normal function sustains energy homeostasis and potentially restrains lifespan-shortening stress signaling. Intact ATP synthase activity is broadly associated with healthy aging, and disruption of Complex V components consistently shortens lifespan in model organisms.
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 about the Methuselah (Mth) pathway is actually relevant — Stunted (sun) acts as a ligand for Mth, and since reduced Mth signaling extends lifespan, the normal function of sun (activating Mth) would be anti-longevity. The model correctly identified the Mth/GPCR connection but drew the wrong conclusion from it. The model argued that sun "restrains lifespan-shortening stress signaling," but actually sun activates Mth signaling, which is pro-aging, making sun itself anti-longevity. The model also incorrectly weighted the ATP synthase function as pro-longevity when the Mth ligand role is the more relevant pathway for longevity classification. The reasoning quality is moderate — the model identified the right pathways but misinterpreted the directionality of the Mth signaling effect on lifespan.
Raw API responses
solver
{
"reasoning": "The *sun* (stunted) gene encodes a subunit of the mitochondrial ATP synthase (Complex V) with proton-transporting ATPase activity via a rotational mechanism, which is central to oxidative phosphorylation and mitochondrial energy production. Proper ATP synthase function is essential for maintaining mitochondrial membrane potential and efficient ATP generation; loss of this activity leads to mitochondrial dysfunction, a hallmark of aging. Additionally, Stunted has been shown to act as a ligand for the GPCR Methuselah (Mth) — its GPCR binding function links it to the Methuselah signaling pathway, where reduced Mth signaling is associated with extended lifespan in Drosophila. The dual role of sun — supporting mitochondrial ATP synthesis and modulating the pro-aging Mth/GPCR pathway — suggests its normal function sustains energy homeostasis and potentially restrains lifespan-shortening stress signaling. Intact ATP synthase activity is broadly associated with healthy aging, and disruption of Complex V components consistently shortens lifespan in model organisms.",
"confidence": 0.72,
"key_pathways": [
"mitochondrial oxidative phosphorylation (Complex V / ATP synthase)",
"Methuselah (Mth) GPCR signaling",
"G protein-coupled receptor ligand-receptor interaction"
],
"mechanism_class": "mitochondrial_dysfunction",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted pro_longevity but the ground truth is anti_longevity. The model's reasoning about the Methuselah (Mth) pathway is actually relevant — Stunted (sun) acts as a ligand for Mth, and since reduced Mth signaling extends lifespan, the normal function of sun (activating Mth) would be anti-longevity. The model correctly identified the Mth/GPCR connection but drew the wrong conclusion from it. The model argued that sun \"restrains lifespan-shortening stress signaling,\" but actually sun activates Mth signaling, which is pro-aging, making sun itself anti-longevity. The model also incorrectly weighted the ATP synthase function as pro-longevity when the Mth ligand role is the more relevant pathway for longevity classification. The reasoning quality is moderate — the model identified the right pathways but misinterpreted the directionality of the Mth signaling effect on lifespan.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 3,
"ground_truth_questionable": false
}