UGA1
S. cerevisiae
4-aminobutyrate transaminase
What the model saw
Gene: UGA1 Organism: Saccharomyces cerevisiae Known functions: 4-aminobutyrate transaminase. 4-aminobutyrate:2-oxoglutarate transaminase activity. pyridoxal phosphate binding.
View unredacted entry
4-aminobutyrate transaminase. 4-aminobutyrate:2-oxoglutarate transaminase activity. pyridoxal phosphate binding.
Solver output
UGA1 encodes 4-aminobutyrate (GABA) transaminase, which catalyzes the conversion of GABA and 2-oxoglutarate to succinic semialdehyde and glutamate as part of the GABA shunt pathway. The GABA shunt feeds carbon into the TCA cycle via succinate, bypassing two steps of the canonical cycle and modulating mitochondrial energy metabolism. In yeast, the GABA shunt is linked to nitrogen catabolite repression and TOR signaling, as GABA serves as a nitrogen source whose catabolism is regulated by nutrient availability. Activation of GABA catabolism through UGA1 can reduce GABA accumulation, promote TCA flux, and modulate TOR pathway activity, effects associated with improved metabolic efficiency and extended chronological lifespan. Additionally, pyridoxal phosphate (PLP)-dependent transamination connects amino acid metabolism to alpha-ketoglutarate/2-oxoglutarate levels, a known longevity-associated metabolite that can inhibit ATP synthase and extend lifespan in multiple organisms.
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 constructed a plausible-sounding but ultimately incorrect mechanistic narrative about UGA1/GABA transaminase promoting longevity through TCA cycle flux and TOR pathway modulation. In reality, UGA1 is anti-longevity in yeast, meaning its deletion or reduction extends lifespan. The model's reasoning about GABA shunt promoting metabolic efficiency and lifespan extension is speculative and contradicted by the actual experimental data. The model showed moderate confidence (0.62) but was wrong on both the answer and the mechanistic direction.
Raw API responses
solver
{
"reasoning": "UGA1 encodes 4-aminobutyrate (GABA) transaminase, which catalyzes the conversion of GABA and 2-oxoglutarate to succinic semialdehyde and glutamate as part of the GABA shunt pathway. The GABA shunt feeds carbon into the TCA cycle via succinate, bypassing two steps of the canonical cycle and modulating mitochondrial energy metabolism. In yeast, the GABA shunt is linked to nitrogen catabolite repression and TOR signaling, as GABA serves as a nitrogen source whose catabolism is regulated by nutrient availability. Activation of GABA catabolism through UGA1 can reduce GABA accumulation, promote TCA flux, and modulate TOR pathway activity, effects associated with improved metabolic efficiency and extended chronological lifespan. Additionally, pyridoxal phosphate (PLP)-dependent transamination connects amino acid metabolism to alpha-ketoglutarate/2-oxoglutarate levels, a known longevity-associated metabolite that can inhibit ATP synthase and extend lifespan in multiple organisms.",
"confidence": 0.62,
"key_pathways": [
"GABA shunt / TCA cycle integration",
"TOR nutrient sensing pathway",
"nitrogen catabolite repression"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted pro_longevity but the ground truth is anti_longevity. The model constructed a plausible-sounding but ultimately incorrect mechanistic narrative about UGA1/GABA transaminase promoting longevity through TCA cycle flux and TOR pathway modulation. In reality, UGA1 is anti-longevity in yeast, meaning its deletion or reduction extends lifespan. The model's reasoning about GABA shunt promoting metabolic efficiency and lifespan extension is speculative and contradicted by the actual experimental data. The model showed moderate confidence (0.62) but was wrong on both the answer and the mechanistic direction.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}