lys7
S. pombe
alpha-aminoadipate reductase phosphopantetheinyl transferase Lys7
What the model saw
Gene: lys7 Organism: Schizosaccharomyces pombe Known functions: alpha-aminoadipate reductase phosphopantetheinyl transferase Lys7. holo-[acyl-carrier-protein] synthase activity. magnesium ion binding.
View unredacted entry
alpha-aminoadipate reductase phosphopantetheinyl transferase Lys7. holo-[acyl-carrier-protein] synthase activity. magnesium ion binding.
Solver output
Lys7 encodes a phosphopantetheinyl transferase (PPTase) that activates the alpha-aminoadipate reductase Lys2 by attaching the 4'-phosphopantetheine cofactor to its carrier protein domain, a step required for lysine biosynthesis via the alpha-aminoadipate pathway unique to fungi. While lysine availability can influence translation and mTOR/nutrient-sensing pathways, the direct role of this enzyme is in amino acid biosynthesis rather than a canonical aging hallmark. Magnesium ion binding supports its catalytic PPTase activity. There is no strong evidence that lys7 itself modulates lifespan beyond its metabolic housekeeping role in lysine production, and auxotrophic effects in laboratory strains complicate interpretation. The connection to longevity is therefore indirect and ambiguous.
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 ground truth classifies lys7 as "anti_longevity" in S. pombe, meaning its deletion or loss extends lifespan. The model predicted "unclear" with low confidence (0.35), failing to identify the anti-longevity classification. The model's reasoning focused on the metabolic housekeeping role of lys7 in lysine biosynthesis and noted that auxotrophic effects complicate interpretation, but did not arrive at the correct conclusion. The model did not consider that lysine biosynthesis gene deletions could extend lifespan (e.g., through caloric restriction-like effects or reduced translation capacity), which is the likely mechanism for anti-longevity classification. The reasoning quality is low because it missed the key insight that nutrient biosynthesis pathway disruption can extend lifespan in yeast models.
Raw API responses
solver
{
"reasoning": "Lys7 encodes a phosphopantetheinyl transferase (PPTase) that activates the alpha-aminoadipate reductase Lys2 by attaching the 4'-phosphopantetheine cofactor to its carrier protein domain, a step required for lysine biosynthesis via the alpha-aminoadipate pathway unique to fungi. While lysine availability can influence translation and mTOR/nutrient-sensing pathways, the direct role of this enzyme is in amino acid biosynthesis rather than a canonical aging hallmark. Magnesium ion binding supports its catalytic PPTase activity. There is no strong evidence that lys7 itself modulates lifespan beyond its metabolic housekeeping role in lysine production, and auxotrophic effects in laboratory strains complicate interpretation. The connection to longevity is therefore indirect and ambiguous.",
"confidence": 0.35,
"key_pathways": [
"lysine biosynthesis (alpha-aminoadipate pathway)",
"phosphopantetheinylation of carrier proteins",
"amino acid metabolism"
],
"mechanism_class": "other",
"longevity_influence": "unclear"
}advisor
{
"notes": "The ground truth classifies lys7 as \"anti_longevity\" in S. pombe, meaning its deletion or loss extends lifespan. The model predicted \"unclear\" with low confidence (0.35), failing to identify the anti-longevity classification. The model's reasoning focused on the metabolic housekeeping role of lys7 in lysine biosynthesis and noted that auxotrophic effects complicate interpretation, but did not arrive at the correct conclusion. The model did not consider that lysine biosynthesis gene deletions could extend lifespan (e.g., through caloric restriction-like effects or reduced translation capacity), which is the likely mechanism for anti-longevity classification. The reasoning quality is low because it missed the key insight that nutrient biosynthesis pathway disruption can extend lifespan in yeast models.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}