pab-2
C. elegans
Polyadenylate-binding protein
What the model saw
Gene: pab-2 Organism: Caenorhabditis elegans Known functions: Polyadenylate-binding protein. RNA binding. mRNA 3'-UTR binding. nucleic acid binding. poly(A) binding. poly(U) RNA binding.
View unredacted entry
Polyadenylate-binding protein. RNA binding. mRNA 3'-UTR binding. nucleic acid binding. poly(A) binding. poly(U) RNA binding.
Solver output
PAB-2 is a cytoplasmic polyadenylate-binding protein (PABP) that binds poly(A) tails and mRNA 3'-UTRs, playing a central role in mRNA stability, translation initiation, and translational regulation. By stabilizing mRNAs and promoting efficient cap-dependent translation through interactions with eIF4G, PABPs support proteostasis by ensuring accurate and robust protein synthesis. In C. elegans, proper translational control is tightly linked to longevity pathways, including the insulin/IGF-1 signaling and TOR nutrient-sensing axes, where regulated mRNA translation is essential for stress resistance and lifespan extension. Loss of PABP function typically impairs global translation fidelity and mRNA stability, which would compromise proteostasis and stress responses. The poly(U) RNA binding activity may additionally implicate pab-2 in mRNA decay regulation, further supporting its role in maintaining the quality of the transcriptome and proteome.
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 pro_longevity but the ground truth is anti_longevity. The model reasoned that PAB-2, as a polyadenylate-binding protein supporting mRNA stability and translation, would be pro-longevity. However, the ground truth indicates pab-2 is anti_longevity, meaning its loss (or reduction) extends lifespan. This is consistent with findings that reducing global translation (e.g., via reduced PABP activity) can extend lifespan in C. elegans, similar to how reduced TOR signaling or ribosomal protein knockdowns extend lifespan. The model's reasoning actually contains the seeds of the correct answer (translational regulation downstream of TOR) but drew the wrong conclusion. The model assumed that supporting translation = pro-longevity, when in fact reducing translation is often lifespan-extending in C. elegans. The confidence was moderate (0.55), so not extremely overconfident, but the prediction was still wrong.
Raw API responses
solver
{
"reasoning": "PAB-2 is a cytoplasmic polyadenylate-binding protein (PABP) that binds poly(A) tails and mRNA 3'-UTRs, playing a central role in mRNA stability, translation initiation, and translational regulation. By stabilizing mRNAs and promoting efficient cap-dependent translation through interactions with eIF4G, PABPs support proteostasis by ensuring accurate and robust protein synthesis. In C. elegans, proper translational control is tightly linked to longevity pathways, including the insulin/IGF-1 signaling and TOR nutrient-sensing axes, where regulated mRNA translation is essential for stress resistance and lifespan extension. Loss of PABP function typically impairs global translation fidelity and mRNA stability, which would compromise proteostasis and stress responses. The poly(U) RNA binding activity may additionally implicate pab-2 in mRNA decay regulation, further supporting its role in maintaining the quality of the transcriptome and proteome.",
"confidence": 0.55,
"key_pathways": [
"mRNA stability and cap-dependent translation initiation",
"translational regulation downstream of TOR/insulin-IGF-1 signaling",
"mRNA 3'-UTR-mediated post-transcriptional gene regulation"
],
"mechanism_class": "loss_of_proteostasis",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted pro_longevity but the ground truth is anti_longevity. The model reasoned that PAB-2, as a polyadenylate-binding protein supporting mRNA stability and translation, would be pro-longevity. However, the ground truth indicates pab-2 is anti_longevity, meaning its loss (or reduction) extends lifespan. This is consistent with findings that reducing global translation (e.g., via reduced PABP activity) can extend lifespan in C. elegans, similar to how reduced TOR signaling or ribosomal protein knockdowns extend lifespan. The model's reasoning actually contains the seeds of the correct answer (translational regulation downstream of TOR) but drew the wrong conclusion. The model assumed that supporting translation = pro-longevity, when in fact reducing translation is often lifespan-extending in C. elegans. The confidence was moderate (0.55), so not extremely overconfident, but the prediction was still wrong.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}