hyl-1
C. elegans
Ceramide synthase hyl-1;TLC domain-containing protein
What the model saw
Gene: hyl-1 Organism: Caenorhabditis elegans Known functions: Ceramide synthase hyl-1;TLC domain-containing protein. sphingosine N-acyltransferase activity.
View unredacted entry
Ceramide synthase hyl-1;TLC domain-containing protein. sphingosine N-acyltransferase activity.
Solver output
HYL-1 is a ceramide synthase (sphingosine N-acyltransferase) that catalyzes the acylation of sphingosine to produce ceramide, a bioactive sphingolipid. In C. elegans, ceramide and sphingolipid signaling are integral to stress responses, apoptosis regulation, and membrane integrity. Ceramide produced by hyl-1 has been linked to the germline signaling pathway that modulates longevity: ceramide accumulation can promote stress resistance and influence DAF-16/FOXO nuclear localization downstream of germline signals. Additionally, ceramide-mediated lipid signaling affects mitochondrial function and autophagy flux, both of which are critical determinants of lifespan in C. elegans. Loss of hyl-1 function alters the ceramide/sphingosine balance, which has been shown to reduce stress resistance and shorten lifespan, suggesting the normal function of hyl-1 is pro-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 pro_longevity for hyl-1. The mechanistic reasoning is plausible and well-grounded: hyl-1 encodes a ceramide synthase, and ceramide/sphingolipid signaling is indeed relevant to C. elegans longevity. The model correctly identifies that loss of hyl-1 reduces stress resistance and shortens lifespan. The mechanism class "altered_intercellular_communication" is a somewhat loose fit for ceramide signaling (lipid metabolism/stress response might be more precise), but the reasoning text itself is more accurate than the mechanism class label. The confidence of 0.62 is appropriately moderate. Overall a solid prediction with good reasoning.
Raw API responses
solver
{
"reasoning": "HYL-1 is a ceramide synthase (sphingosine N-acyltransferase) that catalyzes the acylation of sphingosine to produce ceramide, a bioactive sphingolipid. In C. elegans, ceramide and sphingolipid signaling are integral to stress responses, apoptosis regulation, and membrane integrity. Ceramide produced by hyl-1 has been linked to the germline signaling pathway that modulates longevity: ceramide accumulation can promote stress resistance and influence DAF-16/FOXO nuclear localization downstream of germline signals. Additionally, ceramide-mediated lipid signaling affects mitochondrial function and autophagy flux, both of which are critical determinants of lifespan in C. elegans. Loss of hyl-1 function alters the ceramide/sphingosine balance, which has been shown to reduce stress resistance and shorten lifespan, suggesting the normal function of hyl-1 is pro-longevity.",
"confidence": 0.62,
"key_pathways": [
"ceramide/sphingolipid signaling",
"DAF-16/FOXO stress response pathway",
"germline-to-soma longevity signaling"
],
"mechanism_class": "altered_intercellular_communication",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity for hyl-1. The mechanistic reasoning is plausible and well-grounded: hyl-1 encodes a ceramide synthase, and ceramide/sphingolipid signaling is indeed relevant to C. elegans longevity. The model correctly identifies that loss of hyl-1 reduces stress resistance and shortens lifespan. The mechanism class \"altered_intercellular_communication\" is a somewhat loose fit for ceramide signaling (lipid metabolism/stress response might be more precise), but the reasoning text itself is more accurate than the mechanism class label. The confidence of 0.62 is appropriately moderate. Overall a solid prediction with good reasoning.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 4,
"ground_truth_questionable": false
}