pdp-1
C. elegans
PPM-type phosphatase domain-containing protein
What the model saw
Gene: pdp-1 Organism: Caenorhabditis elegans Known functions: PPM-type phosphatase domain-containing protein. [pyruvate dehydrogenase (acetyl-transferring)]-phosphatase activity. cation binding. protein serine/threonine phosphatase activity.
View unredacted entry
PPM-type phosphatase domain-containing protein. [pyruvate dehydrogenase (acetyl-transferring)]-phosphatase activity. cation binding. protein serine/threonine phosphatase activity.
Solver output
pdp-1 encodes a pyruvate dehydrogenase phosphatase (PDP), which dephosphorylates and thereby activates the pyruvate dehydrogenase complex (PDC). Active PDC converts pyruvate to acetyl-CoA, fueling the TCA cycle and mitochondrial oxidative phosphorylation. Loss of PDC activity shifts metabolism toward anaerobic glycolysis and reduces mitochondrial ATP production efficiency. Maintaining robust PDC activity through pdp-1 supports mitochondrial metabolic homeostasis, which is a key determinant of healthspan and lifespan in C. elegans. Reduced mitochondrial function is a hallmark of aging, and genes that sustain mitochondrial metabolic flux tend to be pro-longevity. The PPM-type phosphatase domain and cation-binding activity are consistent with the Mg²⁺/Mn²⁺-dependent catalytic mechanism of PDP enzymes acting on the E1α subunit of PDC.
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 pro_longevity for pdp-1. The mechanistic reasoning is sound: pdp-1 encodes a pyruvate dehydrogenase phosphatase that activates the pyruvate dehydrogenase complex (PDC), supporting mitochondrial metabolism. The model correctly identifies the PPM-type phosphatase domain and cation-binding activity as consistent with PDP enzyme function. The reasoning connecting PDC activity to mitochondrial metabolic homeostasis and longevity in C. elegans is biologically plausible. One minor note: the model's claim that "genes that sustain mitochondrial metabolic flux tend to be pro-longevity" is a generalization that isn't always true in C. elegans (where some mitochondrial dysfunction paradoxically extends lifespan), but the specific reasoning for pdp-1 is appropriate. Confidence of 0.72 is reasonable.
Raw API responses
solver
{
"reasoning": "pdp-1 encodes a pyruvate dehydrogenase phosphatase (PDP), which dephosphorylates and thereby activates the pyruvate dehydrogenase complex (PDC). Active PDC converts pyruvate to acetyl-CoA, fueling the TCA cycle and mitochondrial oxidative phosphorylation. Loss of PDC activity shifts metabolism toward anaerobic glycolysis and reduces mitochondrial ATP production efficiency. Maintaining robust PDC activity through pdp-1 supports mitochondrial metabolic homeostasis, which is a key determinant of healthspan and lifespan in C. elegans. Reduced mitochondrial function is a hallmark of aging, and genes that sustain mitochondrial metabolic flux tend to be pro-longevity. The PPM-type phosphatase domain and cation-binding activity are consistent with the Mg²⁺/Mn²⁺-dependent catalytic mechanism of PDP enzymes acting on the E1α subunit of PDC.",
"confidence": 0.72,
"key_pathways": [
"pyruvate dehydrogenase complex activation",
"mitochondrial oxidative metabolism / TCA cycle",
"pyruvate-to-acetyl-CoA flux"
],
"mechanism_class": "mitochondrial_dysfunction",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity for pdp-1. The mechanistic reasoning is sound: pdp-1 encodes a pyruvate dehydrogenase phosphatase that activates the pyruvate dehydrogenase complex (PDC), supporting mitochondrial metabolism. The model correctly identifies the PPM-type phosphatase domain and cation-binding activity as consistent with PDP enzyme function. The reasoning connecting PDC activity to mitochondrial metabolic homeostasis and longevity in C. elegans is biologically plausible. One minor note: the model's claim that \"genes that sustain mitochondrial metabolic flux tend to be pro-longevity\" is a generalization that isn't always true in C. elegans (where some mitochondrial dysfunction paradoxically extends lifespan), but the specific reasoning for pdp-1 is appropriate. Confidence of 0.72 is reasonable.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 4,
"ground_truth_questionable": false
}