ALG5
S. cerevisiae
dolichyl-phosphate beta-glucosyltransferase
What the model saw
Gene: ALG5 Organism: Saccharomyces cerevisiae Known functions: dolichyl-phosphate beta-glucosyltransferase. dolichyl-phosphate beta-glucosyltransferase activity.
View unredacted entry
dolichyl-phosphate beta-glucosyltransferase. dolichyl-phosphate beta-glucosyltransferase activity.
Solver output
ALG5 encodes dolichyl-phosphate beta-glucosyltransferase, which synthesizes dolichyl-phosphate-glucose (Dol-P-Glc), the glucose donor required for the final three glucose additions to the lipid-linked oligosaccharide (LLO) precursor in the N-glycosylation pathway. Proper N-glycosylation of nascent proteins in the ER is essential for protein folding, quality control, and proteostasis. Loss of ALG5 function leads to hypoglycosylation of LLO, triggering ER stress and the unfolded protein response (UPR), which impairs proteostasis and is associated with accelerated aging phenotypes. Functional N-glycosylation also supports the calnexin/calreticulin folding cycle, which depends on glucose-trimmed glycans for substrate recognition. Therefore, ALG5's normal role in maintaining proper glycosylation supports proteostasis and is expected to be pro-longevity.
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 the assumption that ALG5 supports proteostasis and therefore should be pro-longevity. However, the ground truth indicates ALG5 is anti_longevity, meaning its deletion or loss actually extends lifespan. The model's mechanistic reasoning about N-glycosylation and proteostasis is plausible in general terms but leads to the wrong conclusion. In yeast, ALG5 deletion may extend lifespan possibly through mechanisms related to reduced ER load, altered glycosylation signaling, or other pathways. The model failed to consider that disruption of this pathway could actually be beneficial for longevity. The confidence of 0.62 is moderate but still wrong. The mechanism class of "loss_of_proteostasis" is also incorrect given the anti_longevity designation means the gene normally shortens lifespan (its presence is anti-longevity).
Raw API responses
solver
{
"reasoning": "ALG5 encodes dolichyl-phosphate beta-glucosyltransferase, which synthesizes dolichyl-phosphate-glucose (Dol-P-Glc), the glucose donor required for the final three glucose additions to the lipid-linked oligosaccharide (LLO) precursor in the N-glycosylation pathway. Proper N-glycosylation of nascent proteins in the ER is essential for protein folding, quality control, and proteostasis. Loss of ALG5 function leads to hypoglycosylation of LLO, triggering ER stress and the unfolded protein response (UPR), which impairs proteostasis and is associated with accelerated aging phenotypes. Functional N-glycosylation also supports the calnexin/calreticulin folding cycle, which depends on glucose-trimmed glycans for substrate recognition. Therefore, ALG5's normal role in maintaining proper glycosylation supports proteostasis and is expected to be pro-longevity.",
"confidence": 0.62,
"key_pathways": [
"N-linked glycosylation / dolichol pathway",
"ER protein quality control and unfolded protein response (UPR)",
"calnexin/calreticulin folding cycle"
],
"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 is based on the assumption that ALG5 supports proteostasis and therefore should be pro-longevity. However, the ground truth indicates ALG5 is anti_longevity, meaning its deletion or loss actually extends lifespan. The model's mechanistic reasoning about N-glycosylation and proteostasis is plausible in general terms but leads to the wrong conclusion. In yeast, ALG5 deletion may extend lifespan possibly through mechanisms related to reduced ER load, altered glycosylation signaling, or other pathways. The model failed to consider that disruption of this pathway could actually be beneficial for longevity. The confidence of 0.62 is moderate but still wrong. The mechanism class of \"loss_of_proteostasis\" is also incorrect given the anti_longevity designation means the gene normally shortens lifespan (its presence is anti-longevity).",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}