Lnk
D. melanogaster
Lnk
What the model saw
Gene: Lnk Organism: Drosophila melanogaster Known functions: Lnk. signaling adaptor activity. transmembrane receptor protein tyrosine kinase adaptor activity.
View unredacted entry
Lnk. signaling adaptor activity. transmembrane receptor protein tyrosine kinase adaptor activity.
Solver output
Lnk is a signaling adaptor with transmembrane receptor protein tyrosine kinase adaptor activity, placing it in the insulin/IGF-1 signaling (IIS) pathway. In Drosophila, Lnk acts as an adaptor for the insulin receptor (InR), facilitating downstream PI3K/Akt signaling. Loss-of-function mutations in Lnk have been shown to reduce IIS activity, mimicking the longevity-extending effects of reduced insulin signaling seen with chico (IRS) or InR mutations. Reduced IIS leads to nuclear retention of the FOXO transcription factor (dFOXO), which upregulates stress resistance and autophagy genes that promote lifespan extension. Thus, the normal (wild-type) function of Lnk — positively transducing insulin receptor signals — promotes IIS activity and would be anti-longevity in its normal role; however, since loss of Lnk extends lifespan, the gene's normal function opposes longevity by sustaining high IIS flux.
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 identified the mechanistic role of Lnk as a positive adaptor in the insulin/IGF-1 signaling pathway, and even explicitly stated that "the gene's normal function opposes longevity by sustaining high IIS flux" — which aligns with the ground truth of anti_longevity. However, the model's final prediction was "pro_longevity," which contradicts both the ground truth and the model's own mechanistic reasoning. This is a clear internal contradiction: the reasoning correctly concludes anti_longevity but the final answer says pro_longevity. The mechanism described is accurate (Lnk as IIS adaptor, loss-of-function extends lifespan), but the model failed to translate its correct reasoning into the correct classification label.
Raw API responses
solver
{
"reasoning": "Lnk is a signaling adaptor with transmembrane receptor protein tyrosine kinase adaptor activity, placing it in the insulin/IGF-1 signaling (IIS) pathway. In Drosophila, Lnk acts as an adaptor for the insulin receptor (InR), facilitating downstream PI3K/Akt signaling. Loss-of-function mutations in Lnk have been shown to reduce IIS activity, mimicking the longevity-extending effects of reduced insulin signaling seen with chico (IRS) or InR mutations. Reduced IIS leads to nuclear retention of the FOXO transcription factor (dFOXO), which upregulates stress resistance and autophagy genes that promote lifespan extension. Thus, the normal (wild-type) function of Lnk — positively transducing insulin receptor signals — promotes IIS activity and would be anti-longevity in its normal role; however, since loss of Lnk extends lifespan, the gene's normal function opposes longevity by sustaining high IIS flux.",
"confidence": 0.72,
"key_pathways": [
"insulin/IGF-1 signaling (IIS)",
"PI3K/Akt/FOXO axis",
"nutrient sensing"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly identified the mechanistic role of Lnk as a positive adaptor in the insulin/IGF-1 signaling pathway, and even explicitly stated that \"the gene's normal function opposes longevity by sustaining high IIS flux\" — which aligns with the ground truth of anti_longevity. However, the model's final prediction was \"pro_longevity,\" which contradicts both the ground truth and the model's own mechanistic reasoning. This is a clear internal contradiction: the reasoning correctly concludes anti_longevity but the final answer says pro_longevity. The mechanism described is accurate (Lnk as IIS adaptor, loss-of-function extends lifespan), but the model failed to translate its correct reasoning into the correct classification label.",
"failure_mode": "right_answer_wrong_reasoning",
"answer_correct": false,
"mechanism_correct": true,
"reasoning_quality": 3,
"ground_truth_questionable": false
}