Atg2
D. melanogaster
Autophagy-related 2
What the model saw
Gene: Atg2 Organism: Drosophila melanogaster Known functions: Autophagy-related 2. phosphatidylinositol-3-phosphate binding. protein-membrane adaptor activity.
View unredacted entry
Autophagy-related 2. phosphatidylinositol-3-phosphate binding. protein-membrane adaptor activity.
Solver output
Atg2 is a core autophagy protein that binds phosphatidylinositol-3-phosphate (PI3P) and acts as a protein-membrane adaptor, functioning at the phagophore assembly site to facilitate autophagosome membrane expansion and closure. In Drosophila, Atg2 is essential for autophagic flux; loss of Atg2 leads to accumulation of autophagic intermediates and failure to degrade cytoplasmic cargo. Macroautophagy is a well-established pro-longevity pathway in model organisms including Drosophila, as it clears damaged proteins and organelles that accumulate with age. Atg2's PI3P-binding activity positions it downstream of the PI3-kinase complex (Vps34/Atg6) and upstream of autophagosome-lysosome fusion, making it indispensable for productive autophagy. Genetic studies in Drosophila have shown that impaired autophagy (including Atg2 loss-of-function) shortens lifespan, while enhanced autophagy extends it, firmly placing Atg2 in the pro-longevity category.
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 pro_longevity for Atg2 in Drosophila melanogaster. The mechanistic reasoning is accurate and detailed: Atg2 is correctly identified as a core autophagy protein involved in autophagosome membrane expansion, PI3P binding, and phagophore assembly. The model correctly notes that loss-of-function shortens lifespan while enhanced autophagy extends it, placing Atg2 firmly in the pro-longevity category. The confidence level of 0.85 is appropriate given the well-established role of autophagy genes in longevity. All key pathways identified are relevant and accurate.
Raw API responses
solver
{
"reasoning": "Atg2 is a core autophagy protein that binds phosphatidylinositol-3-phosphate (PI3P) and acts as a protein-membrane adaptor, functioning at the phagophore assembly site to facilitate autophagosome membrane expansion and closure. In Drosophila, Atg2 is essential for autophagic flux; loss of Atg2 leads to accumulation of autophagic intermediates and failure to degrade cytoplasmic cargo. Macroautophagy is a well-established pro-longevity pathway in model organisms including Drosophila, as it clears damaged proteins and organelles that accumulate with age. Atg2's PI3P-binding activity positions it downstream of the PI3-kinase complex (Vps34/Atg6) and upstream of autophagosome-lysosome fusion, making it indispensable for productive autophagy. Genetic studies in Drosophila have shown that impaired autophagy (including Atg2 loss-of-function) shortens lifespan, while enhanced autophagy extends it, firmly placing Atg2 in the pro-longevity category.",
"confidence": 0.85,
"key_pathways": [
"macroautophagy / autophagosome biogenesis",
"PI3P signaling at phagophore assembly site",
"proteostasis via autophagic cargo clearance"
],
"mechanism_class": "disabled_macroautophagy",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity for Atg2 in Drosophila melanogaster. The mechanistic reasoning is accurate and detailed: Atg2 is correctly identified as a core autophagy protein involved in autophagosome membrane expansion, PI3P binding, and phagophore assembly. The model correctly notes that loss-of-function shortens lifespan while enhanced autophagy extends it, placing Atg2 firmly in the pro-longevity category. The confidence level of 0.85 is appropriate given the well-established role of autophagy genes in longevity. All key pathways identified are relevant and accurate.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 5,
"ground_truth_questionable": false
}