m57.2
C. elegans
Geranylgeranyl transferase type-2 subunit alpha;Protein geranylgeranyltransferase type II
What the model saw
Gene: M57.2 Organism: Caenorhabditis elegans Known functions: Geranylgeranyl transferase type-2 subunit alpha;Protein geranylgeranyltransferase type II. Rab geranylgeranyltransferase activity. protein prenyltransferase activity.
View unredacted entry
Geranylgeranyl transferase type-2 subunit alpha;Protein geranylgeranyltransferase type II. Rab geranylgeranyltransferase activity. protein prenyltransferase activity.
Solver output
M57.2 encodes the alpha subunit of Rab geranylgeranyltransferase (RabGGTase/GGTase-II), which catalyzes the geranylgeranylation (prenylation) of Rab GTPases. This lipid modification is essential for membrane anchoring and activation of Rab GTPases, which are master regulators of vesicular trafficking, endosomal sorting, and autophagy flux. Active Rab GTPases (e.g., RAB-7, RAB-5) facilitate endolysosomal trafficking and mTORC1 recruitment to lysosomes, thereby promoting nutrient-sensing signaling that suppresses autophagy. By enabling Rab GTPase membrane association, M57.2 supports mTORC1 pathway activity and suppresses autophagic degradation, both of which are associated with reduced lifespan. Loss of this prenylation activity would be expected to impair Rab-dependent mTOR activation and potentially enhance autophagy, consistent with a pro-longevity outcome from loss-of-function.
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 anti_longevity but the ground truth is pro_longevity. The model's reasoning is internally consistent but leads to the wrong conclusion. The model argues that M57.2 (RabGGTase alpha subunit) promotes mTORC1 activity and suppresses autophagy, making it anti-longevity. However, the ground truth indicates it is pro_longevity. The mechanistic reasoning about Rab GTPase prenylation enabling mTOR activation is speculative and not well-supported - Rab GTPases have diverse roles beyond mTOR activation, and the connection drawn is overly simplistic. The model's confidence of 0.65 is moderately high for an incorrect prediction. The actual pro-longevity mechanism likely involves Rab GTPase-mediated vesicular trafficking supporting cellular homeostasis, autophagy, or other processes that extend lifespan when the gene is functional, but the model incorrectly framed this as anti-longevity.
Raw API responses
solver
{
"reasoning": "M57.2 encodes the alpha subunit of Rab geranylgeranyltransferase (RabGGTase/GGTase-II), which catalyzes the geranylgeranylation (prenylation) of Rab GTPases. This lipid modification is essential for membrane anchoring and activation of Rab GTPases, which are master regulators of vesicular trafficking, endosomal sorting, and autophagy flux. Active Rab GTPases (e.g., RAB-7, RAB-5) facilitate endolysosomal trafficking and mTORC1 recruitment to lysosomes, thereby promoting nutrient-sensing signaling that suppresses autophagy. By enabling Rab GTPase membrane association, M57.2 supports mTORC1 pathway activity and suppresses autophagic degradation, both of which are associated with reduced lifespan. Loss of this prenylation activity would be expected to impair Rab-dependent mTOR activation and potentially enhance autophagy, consistent with a pro-longevity outcome from loss-of-function.",
"confidence": 0.65,
"key_pathways": [
"Rab GTPase prenylation and membrane targeting",
"mTORC1 lysosomal recruitment via Rab GTPases",
"endolysosomal trafficking and autophagy regulation"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "anti_longevity"
}advisor
{
"notes": "The model predicted anti_longevity but the ground truth is pro_longevity. The model's reasoning is internally consistent but leads to the wrong conclusion. The model argues that M57.2 (RabGGTase alpha subunit) promotes mTORC1 activity and suppresses autophagy, making it anti-longevity. However, the ground truth indicates it is pro_longevity. The mechanistic reasoning about Rab GTPase prenylation enabling mTOR activation is speculative and not well-supported - Rab GTPases have diverse roles beyond mTOR activation, and the connection drawn is overly simplistic. The model's confidence of 0.65 is moderately high for an incorrect prediction. The actual pro-longevity mechanism likely involves Rab GTPase-mediated vesicular trafficking supporting cellular homeostasis, autophagy, or other processes that extend lifespan when the gene is functional, but the model incorrectly framed this as anti-longevity.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}