spt-4
C. elegans
Transcription elongation factor SPT4
What the model saw
Gene: spt-4 Organism: Caenorhabditis elegans Known functions: Transcription elongation factor SPT4. RNA polymerase II complex binding. zinc ion binding.
View unredacted entry
Transcription elongation factor SPT4. RNA polymerase II complex binding. zinc ion binding.
Solver output
SPT4 (DSIF complex subunit) is a transcription elongation factor that associates with RNA Polymerase II to regulate transcriptional elongation and pausing. In C. elegans, spt-4 has been shown to modulate the transcription of repeat-containing genes and aggregation-prone proteins; reduced SPT4 activity decreases transcriptional output of expanded repeat loci, thereby limiting proteotoxic stress. Additionally, SPT4/DSIF complex activity influences chromatin-coupled transcription fidelity, and its partial loss has been linked to lifespan extension in worms by reducing the accumulation of aberrant transcripts and protein aggregates. The zinc ion binding domain is essential for its structural integrity and interaction with RNA Pol II. This places its primary aging-relevant mechanism in epigenetic/transcriptional regulation, most closely aligned with epigenetic alterations as a hallmark of aging.
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's reasoning about SPT4/DSIF reducing proteotoxic stress and extending lifespan is inverted — in reality, spt-4 in C. elegans is anti-longevity, meaning its loss (reduction) extends lifespan, which makes it an anti-longevity gene. The model partially grasped that "reduced SPT4 activity" is beneficial, but then incorrectly classified the gene itself as pro_longevity rather than anti_longevity. The mechanism described (SPT4 reduction extending lifespan via reduced repeat-expansion transcripts) is actually consistent with an anti_longevity classification, yet the model drew the wrong conclusion from its own reasoning. This is a logical inconsistency in the model's output — the reasoning partially supports the correct answer but the final classification is wrong.
Raw API responses
solver
{
"reasoning": "SPT4 (DSIF complex subunit) is a transcription elongation factor that associates with RNA Polymerase II to regulate transcriptional elongation and pausing. In C. elegans, spt-4 has been shown to modulate the transcription of repeat-containing genes and aggregation-prone proteins; reduced SPT4 activity decreases transcriptional output of expanded repeat loci, thereby limiting proteotoxic stress. Additionally, SPT4/DSIF complex activity influences chromatin-coupled transcription fidelity, and its partial loss has been linked to lifespan extension in worms by reducing the accumulation of aberrant transcripts and protein aggregates. The zinc ion binding domain is essential for its structural integrity and interaction with RNA Pol II. This places its primary aging-relevant mechanism in epigenetic/transcriptional regulation, most closely aligned with epigenetic alterations as a hallmark of aging.",
"confidence": 0.62,
"key_pathways": [
"RNA Polymerase II transcription elongation (DSIF complex)",
"repeat-expansion transcript regulation",
"proteostasis via transcriptional fidelity"
],
"mechanism_class": "epigenetic_alterations",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted \"pro_longevity\" but the ground truth is \"anti_longevity.\" The model's reasoning about SPT4/DSIF reducing proteotoxic stress and extending lifespan is inverted — in reality, spt-4 in C. elegans is anti-longevity, meaning its loss (reduction) extends lifespan, which makes it an anti-longevity gene. The model partially grasped that \"reduced SPT4 activity\" is beneficial, but then incorrectly classified the gene itself as pro_longevity rather than anti_longevity. The mechanism described (SPT4 reduction extending lifespan via reduced repeat-expansion transcripts) is actually consistent with an anti_longevity classification, yet the model drew the wrong conclusion from its own reasoning. This is a logical inconsistency in the model's output — the reasoning partially supports the correct answer but the final classification is wrong.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}