BST1
S. cerevisiae
Bst1p
What the model saw
Gene: BST1 Organism: Saccharomyces cerevisiae Known functions: Bst1p. deacylase activity. hydrolase activity, acting on ester bonds. phosphatidylinositol deacylase activity.
View unredacted entry
Bst1p. deacylase activity. hydrolase activity, acting on ester bonds. phosphatidylinositol deacylase activity.
Solver output
BST1 encodes a GPI inositol deacylase (phosphatidylinositol deacylase) that removes the acyl chain from the inositol ring of GPI-anchored proteins in the ER, a critical step in GPI-anchor remodeling required for proper protein sorting and quality control. In yeast, Bst1p is required for efficient ER-to-Golgi transport of GPI-anchored proteins and for their selective autophagy (GPI-anchor protein quality control). Loss of BST1 leads to accumulation of misfolded or improperly processed GPI-anchored proteins, impairing proteostasis. Proper GPI-anchor remodeling by Bst1p supports the selective autophagic clearance of aberrant GPI-anchored proteins, linking it to macroautophagy and proteostasis maintenance. By ensuring efficient protein quality control at the ER level, BST1 function opposes the accumulation of proteotoxic species associated with aging, thus promoting 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 mechanistic reasoning about BST1's role in GPI-anchor remodeling is partially correct in terms of biochemical function, but the model incorrectly inferred that this function promotes longevity. In reality, BST1 is anti-longevity in yeast, meaning its deletion extends lifespan. The model constructed a plausible-sounding but ultimately incorrect narrative about proteostasis maintenance and autophagy supporting longevity. The confidence of 0.65 is notable given the wrong direction. The mechanism_class of "disabled_macroautophagy" is also questionable and not well-supported by the reasoning provided.
Raw API responses
solver
{
"reasoning": "BST1 encodes a GPI inositol deacylase (phosphatidylinositol deacylase) that removes the acyl chain from the inositol ring of GPI-anchored proteins in the ER, a critical step in GPI-anchor remodeling required for proper protein sorting and quality control. In yeast, Bst1p is required for efficient ER-to-Golgi transport of GPI-anchored proteins and for their selective autophagy (GPI-anchor protein quality control). Loss of BST1 leads to accumulation of misfolded or improperly processed GPI-anchored proteins, impairing proteostasis. Proper GPI-anchor remodeling by Bst1p supports the selective autophagic clearance of aberrant GPI-anchored proteins, linking it to macroautophagy and proteostasis maintenance. By ensuring efficient protein quality control at the ER level, BST1 function opposes the accumulation of proteotoxic species associated with aging, thus promoting longevity.",
"confidence": 0.65,
"key_pathways": [
"GPI-anchor remodeling",
"ER protein quality control",
"selective autophagy of GPI-anchored proteins"
],
"mechanism_class": "disabled_macroautophagy",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted pro_longevity but the ground truth is anti_longevity. The model's mechanistic reasoning about BST1's role in GPI-anchor remodeling is partially correct in terms of biochemical function, but the model incorrectly inferred that this function promotes longevity. In reality, BST1 is anti-longevity in yeast, meaning its deletion extends lifespan. The model constructed a plausible-sounding but ultimately incorrect narrative about proteostasis maintenance and autophagy supporting longevity. The confidence of 0.65 is notable given the wrong direction. The mechanism_class of \"disabled_macroautophagy\" is also questionable and not well-supported by the reasoning provided.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}