snap-29
C. elegans
Soluble NSF attachment protein 29
What the model saw
Gene: snap-29 Organism: Caenorhabditis elegans Known functions: Soluble NSF attachment protein 29. SNAP receptor activity.
View unredacted entry
Soluble NSF attachment protein 29. SNAP receptor activity.
Solver output
SNAP-29 is a SNARE protein (Soluble NSF Attachment Protein REceptor) that mediates membrane fusion events critical for vesicular trafficking. In C. elegans, SNAP-29 functions as a key SNARE component required for autophagosome-lysosome fusion during autophagy. Loss of snap-29 impairs autophagic flux by blocking the final fusion step between autophagosomes and lysosomes, which paradoxically can extend lifespan in contexts where autophagy inhibition mimics certain longevity pathways, but the canonical role of SNAP-29 is to enable productive autophagy completion. However, in the context of aging, SNAP-29 also mediates lysosomal exocytosis and other vesicle fusion events; its normal function supports autophagic degradation and proteostasis. Since functional autophagy (promoted by SNAP-29 activity) is pro-longevity, the gene's normal activity supports longevity. Yet evidence in C. elegans specifically shows that snap-29 loss extends lifespan by activating the mitophagy/autophagy axis or by reducing mTORC1 signaling indirectly, suggesting the gene's normal function (promoting fusion/completing autophagy flux) may actually limit lifespan extension. Given that SNAP-29 is required for autophagosome-lysosome fusion and its loss has been linked to lifespan extension in C. elegans through derepression of stress responses, the normal function of snap-29 is anti-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 predicted anti_longevity but the ground truth is pro_longevity. The model's reasoning is internally contradictory and confused - it first argues that SNAP-29 supports autophagy and proteostasis (which would make it pro-longevity), then reverses course to conclude anti_longevity based on speculative claims that snap-29 loss extends lifespan. The model appears to be confusing itself with hedged reasoning and ultimately lands on the wrong answer. The mechanistic reasoning about autophagosome-lysosome fusion is plausible in general, but the conclusion drawn from it is incorrect. The model's confidence of 0.65 is notable given the contradictory reasoning presented.
Raw API responses
solver
{
"reasoning": "SNAP-29 is a SNARE protein (Soluble NSF Attachment Protein REceptor) that mediates membrane fusion events critical for vesicular trafficking. In C. elegans, SNAP-29 functions as a key SNARE component required for autophagosome-lysosome fusion during autophagy. Loss of snap-29 impairs autophagic flux by blocking the final fusion step between autophagosomes and lysosomes, which paradoxically can extend lifespan in contexts where autophagy inhibition mimics certain longevity pathways, but the canonical role of SNAP-29 is to enable productive autophagy completion. However, in the context of aging, SNAP-29 also mediates lysosomal exocytosis and other vesicle fusion events; its normal function supports autophagic degradation and proteostasis. Since functional autophagy (promoted by SNAP-29 activity) is pro-longevity, the gene's normal activity supports longevity. Yet evidence in C. elegans specifically shows that snap-29 loss extends lifespan by activating the mitophagy/autophagy axis or by reducing mTORC1 signaling indirectly, suggesting the gene's normal function (promoting fusion/completing autophagy flux) may actually limit lifespan extension. Given that SNAP-29 is required for autophagosome-lysosome fusion and its loss has been linked to lifespan extension in C. elegans through derepression of stress responses, the normal function of snap-29 is anti-longevity.",
"confidence": 0.65,
"key_pathways": [
"autophagosome-lysosome fusion (SNARE-mediated)",
"vesicular trafficking / membrane fusion",
"macroautophagy flux"
],
"mechanism_class": "disabled_macroautophagy",
"longevity_influence": "anti_longevity"
}advisor
{
"notes": "The model predicted anti_longevity but the ground truth is pro_longevity. The model's reasoning is internally contradictory and confused - it first argues that SNAP-29 supports autophagy and proteostasis (which would make it pro-longevity), then reverses course to conclude anti_longevity based on speculative claims that snap-29 loss extends lifespan. The model appears to be confusing itself with hedged reasoning and ultimately lands on the wrong answer. The mechanistic reasoning about autophagosome-lysosome fusion is plausible in general, but the conclusion drawn from it is incorrect. The model's confidence of 0.65 is notable given the contradictory reasoning presented.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}