hcf-1
C. elegans
Host cell factor homolog hcf-1
What the model saw
Gene: hcf-1 Organism: Caenorhabditis elegans Known functions: Host cell factor homolog hcf-1. DNA-binding transcription factor binding. RNA polymerase II-specific DNA-binding transcription factor binding. protein binding. transcription coactivator activity. transcription coregulator binding. transcription corepressor activity.
View unredacted entry
Host cell factor homolog hcf-1. DNA-binding transcription factor binding. RNA polymerase II-specific DNA-binding transcription factor binding. protein binding. transcription coactivator activity. transcription coregulator binding. transcription corepressor activity.
Solver output
HCF-1 (Host Cell Factor-1) is a transcriptional coregulator with dual coactivator and corepressor activities that binds RNA Pol II-specific transcription factors. In C. elegans, hcf-1 has been shown to interact with the DAF-16/FOXO transcription factor, acting as a corepressor of DAF-16 target genes under nutrient-rich conditions. Loss of hcf-1 function derepresses DAF-16 transcriptional activity, mimicking aspects of reduced insulin/IGF-1 signaling and extending lifespan. The gene's role as a transcription corepressor of FOXO/DAF-16 places it as a negative regulator of the longevity-promoting IIS pathway, meaning its normal function suppresses pro-longevity gene expression programs. This epigenetic/transcriptional coregulatory role — dampening DAF-16-driven stress resistance and longevity gene expression — classifies hcf-1 as anti-longevity in its normal (wild-type) state; however, since the question asks about the gene's normal function promoting or opposing longevity, hcf-1's normal corepressor activity on DAF-16 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 identified the mechanism — hcf-1 acts as a corepressor of DAF-16/FOXO, and its loss extends lifespan — which means hcf-1 is anti_longevity (its normal function opposes longevity). However, the model contradicted itself: after correctly reasoning through the mechanism and explicitly stating "hcf-1's normal corepressor activity on DAF-16 opposes longevity," it still output "pro_longevity" as its final prediction. This is a clear internal contradiction where the reasoning leads to the correct conclusion (anti_longevity) but the final answer is wrong. The model essentially argued for anti_longevity in its reasoning but submitted pro_longevity as its answer, making this a case of wrong final answer despite correct mechanistic reasoning.
Raw API responses
solver
{
"reasoning": "HCF-1 (Host Cell Factor-1) is a transcriptional coregulator with dual coactivator and corepressor activities that binds RNA Pol II-specific transcription factors. In C. elegans, hcf-1 has been shown to interact with the DAF-16/FOXO transcription factor, acting as a corepressor of DAF-16 target genes under nutrient-rich conditions. Loss of hcf-1 function derepresses DAF-16 transcriptional activity, mimicking aspects of reduced insulin/IGF-1 signaling and extending lifespan. The gene's role as a transcription corepressor of FOXO/DAF-16 places it as a negative regulator of the longevity-promoting IIS pathway, meaning its normal function suppresses pro-longevity gene expression programs. This epigenetic/transcriptional coregulatory role — dampening DAF-16-driven stress resistance and longevity gene expression — classifies hcf-1 as anti-longevity in its normal (wild-type) state; however, since the question asks about the gene's normal function promoting or opposing longevity, hcf-1's normal corepressor activity on DAF-16 opposes longevity.",
"confidence": 0.62,
"key_pathways": [
"DAF-16/FOXO transcriptional regulation",
"Insulin/IGF-1 signaling (IIS) pathway",
"Transcriptional corepressor activity on longevity genes"
],
"mechanism_class": "epigenetic_alterations",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly identified the mechanism — hcf-1 acts as a corepressor of DAF-16/FOXO, and its loss extends lifespan — which means hcf-1 is anti_longevity (its normal function opposes longevity). However, the model contradicted itself: after correctly reasoning through the mechanism and explicitly stating \"hcf-1's normal corepressor activity on DAF-16 opposes longevity,\" it still output \"pro_longevity\" as its final prediction. This is a clear internal contradiction where the reasoning leads to the correct conclusion (anti_longevity) but the final answer is wrong. The model essentially argued for anti_longevity in its reasoning but submitted pro_longevity as its answer, making this a case of wrong final answer despite correct mechanistic reasoning.",
"failure_mode": "right_answer_wrong_reasoning",
"answer_correct": false,
"mechanism_correct": true,
"reasoning_quality": 2,
"ground_truth_questionable": false
}