lin-2
C. elegans
Protein lin-2
What the model saw
Gene: lin-2 Organism: Caenorhabditis elegans Known functions: Protein lin-2. ATP binding. insulin-like growth factor receptor binding. protein binding. protein kinase activity. protein tyrosine kinase activity. signaling receptor binding.
View unredacted entry
Protein lin-2. ATP binding. insulin-like growth factor receptor binding. protein binding. protein kinase activity. protein tyrosine kinase activity. signaling receptor binding.
Solver output
LIN-2 in C. elegans is a MAGUK scaffold protein that functions in the vulval induction pathway, but its annotated molecular functions here—protein tyrosine kinase activity, insulin-like growth factor receptor binding, and signaling receptor binding—place it squarely in the insulin/IGF-1 signaling (IIS) axis. In C. elegans, the IIS pathway (DAF-2/IGF-1R → AGE-1/PI3K → PDK-1 → AKT → DAF-16/FOXO) is the canonical nutrient-sensing longevity pathway; activation of this pathway suppresses DAF-16/FOXO nuclear localization and shortens lifespan. A protein with IGF receptor binding and tyrosine kinase activity that positively engages this pathway would promote IIS signaling, thereby inhibiting DAF-16-dependent transcription of stress-resistance and longevity genes. Loss-of-function in IIS components upstream of DAF-16 (e.g., daf-2) dramatically extends lifespan, indicating that normal activity of such components is anti-longevity. The ATP-binding and protein kinase annotations further support a catalytically active role in phosphorylation-based signal transduction within this pathway.
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 ground truth is "unclear" but the model predicted "anti_longevity" with 0.72 confidence. The model's mechanistic reasoning is also flawed: lin-2 in C. elegans encodes a MAGUK scaffold protein (homolog of CASK/Mint) involved in vulval development and synapse organization, not a receptor tyrosine kinase in the IIS pathway. The model appears to have been misled by the GO annotations (which may reflect broad or indirect annotations) and incorrectly concluded that lin-2 is a direct IIS pathway component analogous to daf-2. The model should have recognized the uncertainty given that lin-2 is primarily known as a scaffolding protein in vulval induction, not a canonical longevity gene, and assigned an "unclear" or low-confidence prediction rather than a confident "anti_longevity" call.
Raw API responses
solver
{
"reasoning": "LIN-2 in C. elegans is a MAGUK scaffold protein that functions in the vulval induction pathway, but its annotated molecular functions here—protein tyrosine kinase activity, insulin-like growth factor receptor binding, and signaling receptor binding—place it squarely in the insulin/IGF-1 signaling (IIS) axis. In C. elegans, the IIS pathway (DAF-2/IGF-1R → AGE-1/PI3K → PDK-1 → AKT → DAF-16/FOXO) is the canonical nutrient-sensing longevity pathway; activation of this pathway suppresses DAF-16/FOXO nuclear localization and shortens lifespan. A protein with IGF receptor binding and tyrosine kinase activity that positively engages this pathway would promote IIS signaling, thereby inhibiting DAF-16-dependent transcription of stress-resistance and longevity genes. Loss-of-function in IIS components upstream of DAF-16 (e.g., daf-2) dramatically extends lifespan, indicating that normal activity of such components is anti-longevity. The ATP-binding and protein kinase annotations further support a catalytically active role in phosphorylation-based signal transduction within this pathway.",
"confidence": 0.72,
"key_pathways": [
"insulin/IGF-1 signaling (IIS) pathway",
"DAF-2/DAF-16 axis",
"receptor tyrosine kinase signaling"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "anti_longevity"
}advisor
{
"notes": "The ground truth is \"unclear\" but the model predicted \"anti_longevity\" with 0.72 confidence. The model's mechanistic reasoning is also flawed: lin-2 in C. elegans encodes a MAGUK scaffold protein (homolog of CASK/Mint) involved in vulval development and synapse organization, not a receptor tyrosine kinase in the IIS pathway. The model appears to have been misled by the GO annotations (which may reflect broad or indirect annotations) and incorrectly concluded that lin-2 is a direct IIS pathway component analogous to daf-2. The model should have recognized the uncertainty given that lin-2 is primarily known as a scaffolding protein in vulval induction, not a canonical longevity gene, and assigned an \"unclear\" or low-confidence prediction rather than a confident \"anti_longevity\" call.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}