Prop1
M. musculus
paired like homeodomain factor 1
What the model saw
Gene: Prop1 Organism: Mus musculus Known functions: paired like homeodomain factor 1. homeobox protein prophet of Pit-1. DNA binding. 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. RNA polymerase II cis-regulatory region sequence-specific DNA binding. beta-catenin binding. chromatin binding. protein binding. sequence-specific double-stranded DNA binding.
View unredacted entry
paired like homeodomain factor 1. homeobox protein prophet of Pit-1. DNA binding. 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. RNA polymerase II cis-regulatory region sequence-specific DNA binding. beta-catenin binding. chromatin binding. protein binding. sequence-specific double-stranded DNA binding.
Solver output
PROP1 (Prophet of Pit-1) is a paired-like homeodomain transcription factor that acts as both an activator and repressor via RNA Pol II to drive pituitary organogenesis. Its primary role is to activate POU1F1 (Pit-1) expression, which in turn drives differentiation of somatotroph, lactotroph, and thyrotroph lineages. Loss-of-function mutations in Prop1 (as in the Ames dwarf mouse) result in deficiency of GH, TSH, and prolactin, leading to dramatically reduced IGF-1 signaling. Reduced GH/IGF-1 axis activity downregulates the PI3K-AKT-mTOR nutrient-sensing pathway, a well-established mechanism for lifespan extension in multiple organisms. Ames dwarf mice (Prop1^df/df) are among the longest-lived mouse models, living ~50% longer than wild-type controls, directly linking PROP1's normal transcriptional activator function to the GH/IGF-1 axis and longevity regulation.
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 identifies the biology of PROP1 and Ames dwarf mice, but draws the wrong conclusion about the longevity influence classification. The model reasons that because loss-of-function of PROP1 (in Ames dwarf mice) extends lifespan, PROP1 must be "pro_longevity." However, the GenAge classification is "anti_longevity," which is the correct framing: PROP1's normal function promotes the GH/IGF-1 axis, which shortens lifespan — so PROP1 itself is anti-longevity (its loss leads to longevity). The model confuses the direction: a gene whose loss extends lifespan is anti-longevity, not pro-longevity. The mechanistic description of the biology is accurate (PROP1 drives pituitary development, GH/IGF-1 axis, Ames dwarf mice live ~50% longer), but the model misapplies the GenAge classification convention. This is a confident wrong answer with correct biological facts but incorrect interpretation of the classification framework.
Raw API responses
solver
{
"reasoning": "PROP1 (Prophet of Pit-1) is a paired-like homeodomain transcription factor that acts as both an activator and repressor via RNA Pol II to drive pituitary organogenesis. Its primary role is to activate POU1F1 (Pit-1) expression, which in turn drives differentiation of somatotroph, lactotroph, and thyrotroph lineages. Loss-of-function mutations in Prop1 (as in the Ames dwarf mouse) result in deficiency of GH, TSH, and prolactin, leading to dramatically reduced IGF-1 signaling. Reduced GH/IGF-1 axis activity downregulates the PI3K-AKT-mTOR nutrient-sensing pathway, a well-established mechanism for lifespan extension in multiple organisms. Ames dwarf mice (Prop1^df/df) are among the longest-lived mouse models, living ~50% longer than wild-type controls, directly linking PROP1's normal transcriptional activator function to the GH/IGF-1 axis and longevity regulation.",
"confidence": 0.85,
"key_pathways": [
"GH/IGF-1 signaling axis",
"PI3K-AKT-mTOR nutrient sensing",
"pituitary transcription factor cascade (PROP1-POU1F1)"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly identifies the biology of PROP1 and Ames dwarf mice, but draws the wrong conclusion about the longevity influence classification. The model reasons that because loss-of-function of PROP1 (in Ames dwarf mice) extends lifespan, PROP1 must be \"pro_longevity.\" However, the GenAge classification is \"anti_longevity,\" which is the correct framing: PROP1's normal function promotes the GH/IGF-1 axis, which shortens lifespan — so PROP1 itself is anti-longevity (its loss leads to longevity). The model confuses the direction: a gene whose loss extends lifespan is anti-longevity, not pro-longevity. The mechanistic description of the biology is accurate (PROP1 drives pituitary development, GH/IGF-1 axis, Ames dwarf mice live ~50% longer), but the model misapplies the GenAge classification convention. This is a confident wrong answer with correct biological facts but incorrect interpretation of the classification framework.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}