Rpi
D. melanogaster
Ribose-5-phosphate isomerase
What the model saw
Gene: Rpi Organism: Drosophila melanogaster Known functions: Ribose-5-phosphate isomerase. ribose-5-phosphate isomerase activity.
View unredacted entry
Ribose-5-phosphate isomerase. ribose-5-phosphate isomerase activity.
Solver output
Ribose-5-phosphate isomerase (Rpi) catalyzes the interconversion of ribose-5-phosphate and ribulose-5-phosphate, a central step in the pentose phosphate pathway (PPP). The PPP is a major source of NADPH, which is essential for maintaining cellular redox balance and neutralizing reactive oxygen species (ROS). Additionally, the PPP produces ribose-5-phosphate required for nucleotide biosynthesis, supporting genomic integrity. By sustaining NADPH production and antioxidant capacity, Rpi activity helps protect cells from oxidative damage, a key driver of aging. Furthermore, the PPP intersects with nutrient-sensing networks (e.g., glucose metabolism), and its activity supports anabolic processes critical for cellular homeostasis. Loss of Rpi function would be expected to impair redox buffering and nucleotide synthesis, accelerating aging phenotypes.
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 is based on a plausible but ultimately incorrect assumption that Rpi, as a pentose phosphate pathway enzyme, would be beneficial for longevity through NADPH production and redox homeostasis. In reality, Rpi is anti-longevity in Drosophila, meaning its activity shortens lifespan (or its reduction extends lifespan). The model failed to consider that overactivation of the PPP or Rpi specifically could have detrimental effects, or that Rpi may promote aging through other mechanisms. The reasoning is coherent but leads to the wrong conclusion, and the confidence of 0.65 is notable given the incorrect answer.
Raw API responses
solver
{
"reasoning": "Ribose-5-phosphate isomerase (Rpi) catalyzes the interconversion of ribose-5-phosphate and ribulose-5-phosphate, a central step in the pentose phosphate pathway (PPP). The PPP is a major source of NADPH, which is essential for maintaining cellular redox balance and neutralizing reactive oxygen species (ROS). Additionally, the PPP produces ribose-5-phosphate required for nucleotide biosynthesis, supporting genomic integrity. By sustaining NADPH production and antioxidant capacity, Rpi activity helps protect cells from oxidative damage, a key driver of aging. Furthermore, the PPP intersects with nutrient-sensing networks (e.g., glucose metabolism), and its activity supports anabolic processes critical for cellular homeostasis. Loss of Rpi function would be expected to impair redox buffering and nucleotide synthesis, accelerating aging phenotypes.",
"confidence": 0.65,
"key_pathways": [
"pentose phosphate pathway",
"NADPH-dependent redox homeostasis",
"nucleotide biosynthesis"
],
"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's reasoning is based on a plausible but ultimately incorrect assumption that Rpi, as a pentose phosphate pathway enzyme, would be beneficial for longevity through NADPH production and redox homeostasis. In reality, Rpi is anti-longevity in Drosophila, meaning its activity shortens lifespan (or its reduction extends lifespan). The model failed to consider that overactivation of the PPP or Rpi specifically could have detrimental effects, or that Rpi may promote aging through other mechanisms. The reasoning is coherent but leads to the wrong conclusion, and the confidence of 0.65 is notable given the incorrect answer.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}