lbp-4
C. elegans
Fatty acid-binding protein homolog 4
What the model saw
Gene: lbp-4 Organism: Caenorhabditis elegans Known functions: Fatty acid-binding protein homolog 4. lipid binding.
View unredacted entry
Fatty acid-binding protein homolog 4. lipid binding.
Solver output
LBP-4 is a fatty acid-binding protein (FABP) homolog in C. elegans, responsible for intracellular lipid binding and trafficking. FABPs facilitate the transport of fatty acids to specific cellular compartments, including the nucleus, where they can deliver ligands to nuclear receptors such as NHR-49 (the C. elegans PPARα homolog), thereby modulating lipid metabolism and nutrient-sensing transcriptional programs. Proper lipid homeostasis and fatty acid signaling through nuclear receptors are linked to longevity in C. elegans, as disruption of lipid transport can impair mitochondrial fatty acid oxidation and energy balance. Studies on C. elegans FABPs (lbp family) suggest that members like lbp-3 and lbp-8 promote longevity by channeling fatty acids into pro-longevity signaling; lbp-4, as a related family member, likely participates in similar lipid-mediated nutrient sensing. Loss of such lipid chaperones tends to dysregulate fatty acid metabolism and shorten lifespan, implying the normal function 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 lbp-4. The mechanistic reasoning is plausible and grounded in known C. elegans lipid biology — FABPs, NHR-49/PPARα signaling, and fatty acid transport are all relevant. However, the model appears to be reasoning largely by analogy to lbp-3 and lbp-8 rather than from direct knowledge of lbp-4 specifically, and the confidence is only moderate (0.55), suggesting some uncertainty. The mechanism class of "deregulated_nutrient_sensing" is reasonable but somewhat imprecise — lipid transport/signaling is a better fit than nutrient sensing per se. Overall, the answer is correct with plausible but not definitive mechanistic reasoning.
Raw API responses
solver
{
"reasoning": "LBP-4 is a fatty acid-binding protein (FABP) homolog in C. elegans, responsible for intracellular lipid binding and trafficking. FABPs facilitate the transport of fatty acids to specific cellular compartments, including the nucleus, where they can deliver ligands to nuclear receptors such as NHR-49 (the C. elegans PPARα homolog), thereby modulating lipid metabolism and nutrient-sensing transcriptional programs. Proper lipid homeostasis and fatty acid signaling through nuclear receptors are linked to longevity in C. elegans, as disruption of lipid transport can impair mitochondrial fatty acid oxidation and energy balance. Studies on C. elegans FABPs (lbp family) suggest that members like lbp-3 and lbp-8 promote longevity by channeling fatty acids into pro-longevity signaling; lbp-4, as a related family member, likely participates in similar lipid-mediated nutrient sensing. Loss of such lipid chaperones tends to dysregulate fatty acid metabolism and shorten lifespan, implying the normal function is pro-longevity.",
"confidence": 0.55,
"key_pathways": [
"intracellular fatty acid transport",
"NHR-49/PPAR nuclear receptor signaling",
"lipid homeostasis and nutrient sensing"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity for lbp-4. The mechanistic reasoning is plausible and grounded in known C. elegans lipid biology — FABPs, NHR-49/PPARα signaling, and fatty acid transport are all relevant. However, the model appears to be reasoning largely by analogy to lbp-3 and lbp-8 rather than from direct knowledge of lbp-4 specifically, and the confidence is only moderate (0.55), suggesting some uncertainty. The mechanism class of \"deregulated_nutrient_sensing\" is reasonable but somewhat imprecise — lipid transport/signaling is a better fit than nutrient sensing per se. Overall, the answer is correct with plausible but not definitive mechanistic reasoning.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 3,
"ground_truth_questionable": false
}