Atg3
D. melanogaster
Autophagy-related 3
What the model saw
Gene: Atg3 Organism: Drosophila melanogaster Known functions: Autophagy-related 3. Atg8-family conjugating enzyme activity. ubiquitin-like protein transferase activity.
View unredacted entry
Autophagy-related 3. Atg8-family conjugating enzyme activity. ubiquitin-like protein transferase activity.
Solver output
Atg3 is an E2-like conjugating enzyme essential for the lipidation of Atg8 (the Drosophila homolog of LC3/GABARAP), catalyzing the transfer of Atg8 onto phosphatidylethanolamine on the autophagosomal membrane. This conjugation step is obligatory for autophagosome elongation and closure, making Atg3 a core, non-redundant component of the macroautophagy machinery. In Drosophila, autophagy is well-established as a pro-longevity pathway: loss of Atg genes shortens lifespan, while upregulation of autophagy extends it. By enabling Atg8 lipidation, Atg3 promotes efficient cargo sequestration and degradation, supporting proteostasis, mitochondrial quality control (mitophagy), and clearance of damaged organelles—all of which counteract age-related cellular deterioration. Its ubiquitin-like protein transferase activity is mechanistically identical to its Atg8-conjugating role, reinforcing a singular, well-defined pro-longevity function.
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 with high confidence (0.92). The mechanistic reasoning is excellent and accurate: Atg3 is indeed an E2-like conjugating enzyme that lipidates Atg8 onto phosphatidylethanolamine, which is essential for autophagosome formation. The model correctly identifies that autophagy is a well-established pro-longevity pathway in Drosophila, and that loss of Atg genes shortens lifespan while upregulation extends it. The key pathways identified (Atg8 lipidation, macroautophagy flux, mitophagy) are all relevant and accurate. This is a thorough, well-reasoned prediction with correct answer and correct mechanism.
Raw API responses
solver
{
"reasoning": "Atg3 is an E2-like conjugating enzyme essential for the lipidation of Atg8 (the Drosophila homolog of LC3/GABARAP), catalyzing the transfer of Atg8 onto phosphatidylethanolamine on the autophagosomal membrane. This conjugation step is obligatory for autophagosome elongation and closure, making Atg3 a core, non-redundant component of the macroautophagy machinery. In Drosophila, autophagy is well-established as a pro-longevity pathway: loss of Atg genes shortens lifespan, while upregulation of autophagy extends it. By enabling Atg8 lipidation, Atg3 promotes efficient cargo sequestration and degradation, supporting proteostasis, mitochondrial quality control (mitophagy), and clearance of damaged organelles—all of which counteract age-related cellular deterioration. Its ubiquitin-like protein transferase activity is mechanistically identical to its Atg8-conjugating role, reinforcing a singular, well-defined pro-longevity function.",
"confidence": 0.92,
"key_pathways": [
"Atg8 lipidation / autophagosome biogenesis",
"macroautophagy flux",
"mitophagy and organelle quality control"
],
"mechanism_class": "disabled_macroautophagy",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity with high confidence (0.92). The mechanistic reasoning is excellent and accurate: Atg3 is indeed an E2-like conjugating enzyme that lipidates Atg8 onto phosphatidylethanolamine, which is essential for autophagosome formation. The model correctly identifies that autophagy is a well-established pro-longevity pathway in Drosophila, and that loss of Atg genes shortens lifespan while upregulation extends it. The key pathways identified (Atg8 lipidation, macroautophagy flux, mitophagy) are all relevant and accurate. This is a thorough, well-reasoned prediction with correct answer and correct mechanism.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 5,
"ground_truth_questionable": false
}