Mad
D. melanogaster
Mothers against dpp
What the model saw
Gene: Mad Organism: Drosophila melanogaster Known functions: Mothers against dpp. mothers against dpp. DNA-binding transcription activator activity, RNA polymerase II-specific. DNA-binding transcription factor activity, RNA polymerase II-specific. DNA-binding transcription repressor activity, RNA polymerase II-specific. I-SMAD binding. RNA polymerase II cis-regulatory region sequence-specific DNA binding. RNA polymerase II transcription regulatory region sequence-specific DNA binding. RNA polymerase II-specific DNA-binding transcription factor binding. co-SMAD binding. protein binding. sequence-specific DNA binding. transcription coactivator activity.
View unredacted entry
Mothers against dpp. mothers against dpp. DNA-binding transcription activator activity, RNA polymerase II-specific. DNA-binding transcription factor activity, RNA polymerase II-specific. DNA-binding transcription repressor activity, RNA polymerase II-specific. I-SMAD binding. RNA polymerase II cis-regulatory region sequence-specific DNA binding. RNA polymerase II transcription regulatory region sequence-specific DNA binding. RNA polymerase II-specific DNA-binding transcription factor binding. co-SMAD binding. protein binding. sequence-specific DNA binding. transcription coactivator activity.
Solver output
Mad (Mothers against dpp) is the canonical R-SMAD transcriptional effector of the Drosophila BMP/Dpp signaling pathway. Upon BMP ligand binding, Mad is phosphorylated, forms a complex with the co-SMAD Medea, and acts as a DNA-binding transcription activator/repressor at RNA Pol II-regulated target genes. BMP/Dpp-SMAD signaling in Drosophila is a well-established pro-longevity pathway: activation of Mad in the intestine and other tissues suppresses age-related tissue dysplasia, maintains intestinal stem cell homeostasis, and limits chronic inflammation. The I-SMAD binding activity reflects Mad's regulation by inhibitory SMADs, consistent with its role as a tightly controlled signaling node. Loss of Mad function accelerates intestinal aging and reduces lifespan, while enhanced Dpp-Mad signaling extends lifespan, placing Mad firmly in the pro-longevity category through maintenance of tissue homeostasis and stem cell regulation downstream of BMP signaling.
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 Mad as pro_longevity with solid mechanistic reasoning about BMP/Dpp-SMAD signaling, intestinal stem cell homeostasis, and tissue maintenance. The mechanism class "deregulated_nutrient_sensing" is slightly off — BMP/Dpp signaling is more accurately classified as a growth factor/morphogen signaling pathway rather than nutrient sensing — but the core mechanistic explanation in the reasoning text is accurate and well-supported. The model correctly identifies Mad's role in intestinal homeostasis and lifespan extension through BMP signaling. Minor deduction for the misclassified mechanism_class field.
Raw API responses
solver
{
"reasoning": "Mad (Mothers against dpp) is the canonical R-SMAD transcriptional effector of the Drosophila BMP/Dpp signaling pathway. Upon BMP ligand binding, Mad is phosphorylated, forms a complex with the co-SMAD Medea, and acts as a DNA-binding transcription activator/repressor at RNA Pol II-regulated target genes. BMP/Dpp-SMAD signaling in Drosophila is a well-established pro-longevity pathway: activation of Mad in the intestine and other tissues suppresses age-related tissue dysplasia, maintains intestinal stem cell homeostasis, and limits chronic inflammation. The I-SMAD binding activity reflects Mad's regulation by inhibitory SMADs, consistent with its role as a tightly controlled signaling node. Loss of Mad function accelerates intestinal aging and reduces lifespan, while enhanced Dpp-Mad signaling extends lifespan, placing Mad firmly in the pro-longevity category through maintenance of tissue homeostasis and stem cell regulation downstream of BMP signaling.",
"confidence": 0.72,
"key_pathways": [
"BMP/Dpp-SMAD signaling",
"intestinal stem cell homeostasis",
"TGF-beta transcriptional regulation"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted Mad as pro_longevity with solid mechanistic reasoning about BMP/Dpp-SMAD signaling, intestinal stem cell homeostasis, and tissue maintenance. The mechanism class \"deregulated_nutrient_sensing\" is slightly off — BMP/Dpp signaling is more accurately classified as a growth factor/morphogen signaling pathway rather than nutrient sensing — but the core mechanistic explanation in the reasoning text is accurate and well-supported. The model correctly identifies Mad's role in intestinal homeostasis and lifespan extension through BMP signaling. Minor deduction for the misclassified mechanism_class field.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 4,
"ground_truth_questionable": false
}