ceh-20
C. elegans
Homeobox protein ceh-20
What the model saw
Gene: ceh-20 Organism: Caenorhabditis elegans Known functions: Homeobox protein ceh-20. DNA binding. DNA-binding transcription activator activity, RNA polymerase II-specific. DNA-binding transcription factor activity. DNA-binding transcription factor activity, RNA polymerase II-specific. RNA polymerase II cis-regulatory region sequence-specific DNA binding. RNA polymerase II transcription regulatory region sequence-specific DNA binding. cis-regulatory region sequence-specific DNA binding. protein binding. transcription coactivator binding.
View unredacted entry
Homeobox protein ceh-20. DNA binding. DNA-binding transcription activator activity, RNA polymerase II-specific. DNA-binding transcription factor activity. DNA-binding transcription factor activity, RNA polymerase II-specific. RNA polymerase II cis-regulatory region sequence-specific DNA binding. RNA polymerase II transcription regulatory region sequence-specific DNA binding. cis-regulatory region sequence-specific DNA binding. protein binding. transcription coactivator binding.
Solver output
CEH-20 is the C. elegans ortholog of the TALE-class homeodomain transcription factor PBX, which functions as a cofactor for HOX-family proteins and other developmental transcription factors. In C. elegans, ceh-20 cooperates with the homeodomain protein unc-62 and has been linked to transcriptional programs downstream of insulin/IGF-1 signaling and DAF-16/FOXO regulation. As a transcription activator with RNA Pol II-specific activity and coactivator-binding capacity, CEH-20 likely participates in activating stress-response and metabolic gene programs that extend lifespan, consistent with its role as a positive transcriptional regulator in pathways that overlap with the IIS/DAF-16 longevity axis. Loss of PBX-class cofactors in other organisms disrupts proteostasis and stress-response transcription, suggesting the normal function of ceh-20 supports rather than opposes 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 correctly predicted pro_longevity for ceh-20. However, the mechanistic reasoning appears to be largely speculative and potentially inaccurate. The model claims ceh-20 is linked to insulin/IGF-1 signaling and DAF-16/FOXO regulation, but this connection is not well-established in the literature for ceh-20 specifically. The actual pro-longevity role of ceh-20 in C. elegans is more directly tied to its role as a PBX/TALE homeodomain transcription factor cooperating with UNC-62 (MEIS ortholog) in developmental and transcriptional programs - not specifically through the IIS/DAF-16 axis as the model implies. The model is essentially guessing at the mechanism by invoking the most common C. elegans longevity pathway (IIS/DAF-16) without solid evidence. The reasoning is speculative and the confidence (0.62) is moderate, suggesting the model is not highly certain. The mechanism classification as "other" is vague. Overall, the correct answer was reached but through poorly supported mechanistic reasoning.
Raw API responses
solver
{
"reasoning": "CEH-20 is the C. elegans ortholog of the TALE-class homeodomain transcription factor PBX, which functions as a cofactor for HOX-family proteins and other developmental transcription factors. In C. elegans, ceh-20 cooperates with the homeodomain protein unc-62 and has been linked to transcriptional programs downstream of insulin/IGF-1 signaling and DAF-16/FOXO regulation. As a transcription activator with RNA Pol II-specific activity and coactivator-binding capacity, CEH-20 likely participates in activating stress-response and metabolic gene programs that extend lifespan, consistent with its role as a positive transcriptional regulator in pathways that overlap with the IIS/DAF-16 longevity axis. Loss of PBX-class cofactors in other organisms disrupts proteostasis and stress-response transcription, suggesting the normal function of ceh-20 supports rather than opposes longevity.",
"confidence": 0.62,
"key_pathways": [
"insulin/IGF-1 signaling (IIS) / DAF-16 transcriptional network",
"HOX/TALE homeodomain transcriptional regulation",
"RNA polymerase II-dependent stress-response gene activation"
],
"mechanism_class": "other",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity for ceh-20. However, the mechanistic reasoning appears to be largely speculative and potentially inaccurate. The model claims ceh-20 is linked to insulin/IGF-1 signaling and DAF-16/FOXO regulation, but this connection is not well-established in the literature for ceh-20 specifically. The actual pro-longevity role of ceh-20 in C. elegans is more directly tied to its role as a PBX/TALE homeodomain transcription factor cooperating with UNC-62 (MEIS ortholog) in developmental and transcriptional programs - not specifically through the IIS/DAF-16 axis as the model implies. The model is essentially guessing at the mechanism by invoking the most common C. elegans longevity pathway (IIS/DAF-16) without solid evidence. The reasoning is speculative and the confidence (0.62) is moderate, suggesting the model is not highly certain. The mechanism classification as \"other\" is vague. Overall, the correct answer was reached but through poorly supported mechanistic reasoning.",
"failure_mode": "right_answer_wrong_reasoning",
"answer_correct": true,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}