ALG12

solver

{
  "reasoning": "ALG12 encodes a dolichyl-P-mannose-dependent alpha-1,6-mannosyltransferase that adds the eighth mannose residue to the lipid-linked oligosaccharide precursor (Man8GlcNAc2-PP-dolichol) during N-linked glycosylation in the ER. Proper assembly of the dolichol-linked oligosaccharide is essential for co-translational N-glycosylation of nascent proteins, which is a critical component of ER proteostasis and protein quality control. Loss of ALG12 function leads to hypoglycosylation, triggering the unfolded protein response (UPR) and ER stress, which are associated with accelerated aging and reduced lifespan. Correct N-glycosylation supports proper protein folding, stability, and trafficking, all of which are central to maintaining proteostasis. Therefore, the normal function of ALG12 in completing the dolichol pathway supports proteostasis and is expected to be pro-longevity.",
  "confidence": 0.62,
  "key_pathways": [
    "N-linked glycosylation / dolichol-linked oligosaccharide assembly",
    "ER proteostasis and unfolded protein response (UPR)",
    "protein quality control"
  ],
  "mechanism_class": "loss_of_proteostasis",
  "longevity_influence": "pro_longevity"
}

advisor

{
  "notes": "The model predicted pro_longevity but the ground truth is anti_longevity. The model's reasoning assumed that because ALG12 supports N-glycosylation and proteostasis, its loss would be harmful (pro-aging), making ALG12 itself pro-longevity. However, the GenAge database classifies ALG12 as anti_longevity, meaning its deletion or loss of function actually extends lifespan in yeast. The model's mechanistic reasoning about N-glycosylation and ER proteostasis is plausible in general terms but leads to the wrong conclusion. In yeast chronological or replicative lifespan studies, deletion of ALG12 can extend lifespan, possibly because mild ER stress or reduced glycosylation activates beneficial stress response pathways (hormesis). The model failed to consider that the gene could be anti-longevity (i.e., its normal function shortens lifespan or its deletion extends lifespan). The confidence of 0.62 is moderate but still wrong.",
  "failure_mode": "confident_wrong",
  "answer_correct": false,
  "mechanism_correct": false,
  "reasoning_quality": 2,
  "ground_truth_questionable": false
}