Htr1b
M. musculus
5-hydroxytryptamine (serotonin) receptor 1B
What the model saw
Gene: Htr1b Organism: Mus musculus Known functions: 5-hydroxytryptamine (serotonin) receptor 1B. 5-hydroxytryptamine receptor 1B. G protein-coupled receptor activity. G protein-coupled serotonin receptor activity. Gi/o-coupled serotonin receptor activity. heterocyclic compound binding. neurotransmitter receptor activity. serotonin binding. serotonin receptor activity. voltage-gated calcium channel activity involved in regulation of presynaptic cytosolic calcium levels.
View unredacted entry
5-hydroxytryptamine (serotonin) receptor 1B. 5-hydroxytryptamine receptor 1B. G protein-coupled receptor activity. G protein-coupled serotonin receptor activity. Gi/o-coupled serotonin receptor activity. heterocyclic compound binding. neurotransmitter receptor activity. serotonin binding. serotonin receptor activity. voltage-gated calcium channel activity involved in regulation of presynaptic cytosolic calcium levels.
Solver output
Htr1b encodes the serotonin 1B receptor, a Gi/o-coupled GPCR that inhibits adenylyl cyclase and reduces cAMP upon serotonin binding, thereby suppressing neuronal excitability and presynaptic neurotransmitter release via modulation of voltage-gated calcium channels. Serotonergic signaling intersects with nutrient sensing (e.g., mTOR, insulin pathways) and has been linked to metabolic regulation, but the net effect of Htr1b specifically on longevity is not straightforward. Gi/o-coupled receptor activation can reduce cAMP-PKA signaling, which in some contexts mimics caloric restriction and could be pro-longevity, but Htr1b's primary role is in presynaptic autoinhibition and intercellular serotonergic communication rather than a canonical aging pathway. The evidence linking this specific receptor subtype to lifespan extension or reduction in mice is not well-established, and its effects on aging-relevant pathways (e.g., inflammation, proteostasis, mitochondrial function) are indirect and context-dependent.
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 "unclear" while the ground truth is "pro_longevity." The model correctly identified the receptor's basic biology (Gi/o-coupled, serotonin 1B receptor, presynaptic inhibition) but failed to connect it to a pro-longevity outcome. The model's reasoning was overly cautious and generic, noting that the evidence is "not well-established" without committing to a direction. The mechanistic reasoning about Gi/o-cAMP-PKA signaling potentially mimicking caloric restriction was mentioned but dismissed. The model's confidence was appropriately low (0.35), but the prediction was still wrong. The ground truth indicates Htr1b is pro-longevity in mice, which the model failed to predict. The reasoning quality is low because the model did not leverage any specific knowledge about Htr1b knockout or overexpression studies in mice that would establish its pro-longevity role.
Raw API responses
solver
{
"reasoning": "Htr1b encodes the serotonin 1B receptor, a Gi/o-coupled GPCR that inhibits adenylyl cyclase and reduces cAMP upon serotonin binding, thereby suppressing neuronal excitability and presynaptic neurotransmitter release via modulation of voltage-gated calcium channels. Serotonergic signaling intersects with nutrient sensing (e.g., mTOR, insulin pathways) and has been linked to metabolic regulation, but the net effect of Htr1b specifically on longevity is not straightforward. Gi/o-coupled receptor activation can reduce cAMP-PKA signaling, which in some contexts mimics caloric restriction and could be pro-longevity, but Htr1b's primary role is in presynaptic autoinhibition and intercellular serotonergic communication rather than a canonical aging pathway. The evidence linking this specific receptor subtype to lifespan extension or reduction in mice is not well-established, and its effects on aging-relevant pathways (e.g., inflammation, proteostasis, mitochondrial function) are indirect and context-dependent.",
"confidence": 0.35,
"key_pathways": [
"Gi/o-cAMP-PKA signaling",
"serotonergic neurotransmission and presynaptic inhibition",
"voltage-gated calcium channel regulation"
],
"mechanism_class": "altered_intercellular_communication",
"longevity_influence": "unclear"
}advisor
{
"notes": "The model predicted \"unclear\" while the ground truth is \"pro_longevity.\" The model correctly identified the receptor's basic biology (Gi/o-coupled, serotonin 1B receptor, presynaptic inhibition) but failed to connect it to a pro-longevity outcome. The model's reasoning was overly cautious and generic, noting that the evidence is \"not well-established\" without committing to a direction. The mechanistic reasoning about Gi/o-cAMP-PKA signaling potentially mimicking caloric restriction was mentioned but dismissed. The model's confidence was appropriately low (0.35), but the prediction was still wrong. The ground truth indicates Htr1b is pro-longevity in mice, which the model failed to predict. The reasoning quality is low because the model did not leverage any specific knowledge about Htr1b knockout or overexpression studies in mice that would establish its pro-longevity role.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}