PXL1
S. cerevisiae
Pxl1p
What the model saw
Gene: PXL1 Organism: Saccharomyces cerevisiae Known functions: Pxl1p. GTPase regulator activity. Rho GDP-dissociation inhibitor activity. zinc ion binding.
View unredacted entry
Pxl1p. GTPase regulator activity. Rho GDP-dissociation inhibitor activity. zinc ion binding.
Solver output
PXL1 encodes a paxillin-like LIM domain protein in S. cerevisiae with GTPase regulator activity and Rho GDP-dissociation inhibitor (GDI) activity, placing it in the Rho GTPase signaling network. Rho GDIs typically sequester Rho GTPases in their inactive GDP-bound state, dampening downstream effectors such as the cell wall integrity (CWI) pathway and actin cytoskeleton remodeling. While Rho GTPase regulation is critical for cytokinesis and morphogenesis, the net effect of PXL1's GDI activity on longevity is ambiguous: inhibiting Rho could reduce stress-responsive signaling (potentially anti-longevity) or prevent hyperactivation of growth pathways (potentially pro-longevity). The zinc ion binding via LIM domains supports protein-protein interactions but does not resolve the directional effect on aging. No direct evidence links PXL1 specifically to chronological or replicative lifespan pathways in yeast.
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 "unclear" while the ground truth is "anti_longevity." The model's reasoning about Rho GDI activity and its ambiguous effects on longevity is plausible but ultimately incorrect in its conclusion. The model explicitly stated "No direct evidence links PXL1 specifically to chronological or replicative lifespan pathways in yeast," which is contradicted by the GenAge database entry. The mechanistic reasoning about Rho GTPase signaling is speculative and doesn't align with the actual anti-longevity classification. The model's confidence of 0.35 reflects appropriate uncertainty, but the prediction of "unclear" rather than "anti_longevity" is still wrong. The reasoning quality is low because it failed to identify the correct directional effect and relied on generic pathway reasoning without arriving at the correct conclusion.
Raw API responses
solver
{
"reasoning": "PXL1 encodes a paxillin-like LIM domain protein in S. cerevisiae with GTPase regulator activity and Rho GDP-dissociation inhibitor (GDI) activity, placing it in the Rho GTPase signaling network. Rho GDIs typically sequester Rho GTPases in their inactive GDP-bound state, dampening downstream effectors such as the cell wall integrity (CWI) pathway and actin cytoskeleton remodeling. While Rho GTPase regulation is critical for cytokinesis and morphogenesis, the net effect of PXL1's GDI activity on longevity is ambiguous: inhibiting Rho could reduce stress-responsive signaling (potentially anti-longevity) or prevent hyperactivation of growth pathways (potentially pro-longevity). The zinc ion binding via LIM domains supports protein-protein interactions but does not resolve the directional effect on aging. No direct evidence links PXL1 specifically to chronological or replicative lifespan pathways in yeast.",
"confidence": 0.35,
"key_pathways": [
"Rho GTPase signaling",
"cell wall integrity pathway",
"actin cytoskeleton regulation"
],
"mechanism_class": "altered_intercellular_communication",
"longevity_influence": "unclear"
}advisor
{
"notes": "The model predicted \"unclear\" while the ground truth is \"anti_longevity.\" The model's reasoning about Rho GDI activity and its ambiguous effects on longevity is plausible but ultimately incorrect in its conclusion. The model explicitly stated \"No direct evidence links PXL1 specifically to chronological or replicative lifespan pathways in yeast,\" which is contradicted by the GenAge database entry. The mechanistic reasoning about Rho GTPase signaling is speculative and doesn't align with the actual anti-longevity classification. The model's confidence of 0.35 reflects appropriate uncertainty, but the prediction of \"unclear\" rather than \"anti_longevity\" is still wrong. The reasoning quality is low because it failed to identify the correct directional effect and relied on generic pathway reasoning without arriving at the correct conclusion.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}