Ppm1d
M. musculus
protein phosphatase 1D magnesium-dependent, delta isoform
What the model saw
Gene: Ppm1d Organism: Mus musculus Known functions: protein phosphatase 1D magnesium-dependent, delta isoform. protein phosphatase 1D. cation binding. mitogen-activated protein kinase binding. protein serine/threonine phosphatase activity.
View unredacted entry
protein phosphatase 1D magnesium-dependent, delta isoform. protein phosphatase 1D. cation binding. mitogen-activated protein kinase binding. protein serine/threonine phosphatase activity.
Solver output
PPM1D (also known as Wip1) is a Mg2+-dependent serine/threonine phosphatase that directly dephosphorylates and inactivates key DNA damage response (DDR) components, including p53 (at Ser15), γH2AX, CHK1, CHK2, and ATM. By terminating the DDR signal, PPM1D suppresses apoptosis and cell cycle arrest in response to genotoxic stress, effectively dampening the genome surveillance machinery. Gain-of-function or overexpression of PPM1D is well-documented to promote oncogenesis and impair the clearance of damaged cells, while its loss enhances p53-dependent tumor suppression and extends healthspan in mouse models. Its MAPK-binding activity further links it to stress-response pathway attenuation. Because normal PPM1D function blunts the DDR and p53 axis—critical guardians against genomic instability and cellular senescence—its activity is net anti-longevity.
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 anti_longevity but the ground truth is pro_longevity. The model's reasoning about PPM1D/Wip1's role in dephosphorylating DDR components (p53, γH2AX, CHK1/2, ATM) is mechanistically accurate in general terms. However, the model drew the wrong conclusion about longevity influence. In mouse models, Ppm1d loss (not gain) is associated with accelerated aging phenotypes, while normal/intact Ppm1d function is pro-longevity. The model incorrectly stated that 'loss enhances p53-dependent tumor suppression and extends healthspan' — while loss may enhance tumor suppression, it does not extend healthspan/lifespan; rather, excessive p53 activity and DDR signaling can accelerate aging. The model conflated tumor suppression with longevity, which is a common but incorrect assumption. PPM1D's role in moderating the DDR and preventing excessive p53-driven cellular senescence/apoptosis is actually pro-longevity. The model was confident (0.78) in the wrong direction.
Raw API responses
solver
{
"reasoning": "PPM1D (also known as Wip1) is a Mg2+-dependent serine/threonine phosphatase that directly dephosphorylates and inactivates key DNA damage response (DDR) components, including p53 (at Ser15), γH2AX, CHK1, CHK2, and ATM. By terminating the DDR signal, PPM1D suppresses apoptosis and cell cycle arrest in response to genotoxic stress, effectively dampening the genome surveillance machinery. Gain-of-function or overexpression of PPM1D is well-documented to promote oncogenesis and impair the clearance of damaged cells, while its loss enhances p53-dependent tumor suppression and extends healthspan in mouse models. Its MAPK-binding activity further links it to stress-response pathway attenuation. Because normal PPM1D function blunts the DDR and p53 axis—critical guardians against genomic instability and cellular senescence—its activity is net anti-longevity.",
"confidence": 0.78,
"key_pathways": [
"DNA damage response / ATM-p53 axis dephosphorylation",
"p53 tumor suppressor inactivation",
"CHK1/CHK2 checkpoint termination"
],
"mechanism_class": "genomic_instability",
"longevity_influence": "anti_longevity"
}advisor
{
"notes": "The model predicted anti_longevity but the ground truth is pro_longevity. The model's reasoning about PPM1D/Wip1's role in dephosphorylating DDR components (p53, γH2AX, CHK1/2, ATM) is mechanistically accurate in general terms. However, the model drew the wrong conclusion about longevity influence. In mouse models, Ppm1d loss (not gain) is associated with accelerated aging phenotypes, while normal/intact Ppm1d function is pro-longevity. The model incorrectly stated that 'loss enhances p53-dependent tumor suppression and extends healthspan' — while loss may enhance tumor suppression, it does not extend healthspan/lifespan; rather, excessive p53 activity and DDR signaling can accelerate aging. The model conflated tumor suppression with longevity, which is a common but incorrect assumption. PPM1D's role in moderating the DDR and preventing excessive p53-driven cellular senescence/apoptosis is actually pro-longevity. The model was confident (0.78) in the wrong direction.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 3,
"ground_truth_questionable": false
}