SIP2
S. cerevisiae
Sip2p
What the model saw
Gene: SIP2 Organism: Saccharomyces cerevisiae Known functions: Sip2p. AMP-activated protein kinase activity. enzyme-substrate adaptor activity. protein binding. protein kinase binding.
View unredacted entry
Sip2p. AMP-activated protein kinase activity. enzyme-substrate adaptor activity. protein binding. protein kinase binding.
Solver output
SIP2 encodes a beta-subunit of the Snf1/AMPK complex in S. cerevisiae, functioning as an enzyme-substrate adaptor and protein kinase binding partner. As a regulatory beta-subunit, Sip2p modulates Snf1 (yeast AMPK) activity; specifically, Sip2p-containing Snf1 complexes are less active, which dampens Snf1 signaling. Reduced Snf1/AMPK activity via Sip2p has been shown to extend replicative lifespan in yeast by attenuating phosphorylation of the histone acetyltransferase Gcn5 and reducing histone H3 acetylation at specific loci, thereby slowing aging-associated transcriptional changes. This places SIP2 in the deregulated nutrient-sensing hallmark, as AMPK is a central energy/nutrient sensor. Loss of SIP2 accelerates aging, while its presence promotes longevity through modulation of the Snf1 kinase complex.
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" with 0.72 confidence, but the ground truth is "unclear." The mechanistic reasoning is actually quite good and well-grounded in the literature — SIP2 is indeed a beta-subunit of the Snf1/AMPK complex, and there is published evidence (e.g., Ashrafi et al.) suggesting SIP2 overexpression extends replicative lifespan. However, the GenAge database classifies SIP2's longevity influence as "unclear," suggesting the evidence is ambiguous or contested. The model was overconfident in assigning a definitive "pro_longevity" classification when the curated database considers the evidence unclear. The mechanistic description itself is plausible and largely accurate, but the conclusion drawn from it is too definitive given the actual state of evidence.
Raw API responses
solver
{
"reasoning": "SIP2 encodes a beta-subunit of the Snf1/AMPK complex in S. cerevisiae, functioning as an enzyme-substrate adaptor and protein kinase binding partner. As a regulatory beta-subunit, Sip2p modulates Snf1 (yeast AMPK) activity; specifically, Sip2p-containing Snf1 complexes are less active, which dampens Snf1 signaling. Reduced Snf1/AMPK activity via Sip2p has been shown to extend replicative lifespan in yeast by attenuating phosphorylation of the histone acetyltransferase Gcn5 and reducing histone H3 acetylation at specific loci, thereby slowing aging-associated transcriptional changes. This places SIP2 in the deregulated nutrient-sensing hallmark, as AMPK is a central energy/nutrient sensor. Loss of SIP2 accelerates aging, while its presence promotes longevity through modulation of the Snf1 kinase complex.",
"confidence": 0.72,
"key_pathways": [
"Snf1/AMPK nutrient sensing pathway",
"histone acetylation via Gcn5",
"replicative lifespan regulation"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted \"pro_longevity\" with 0.72 confidence, but the ground truth is \"unclear.\" The mechanistic reasoning is actually quite good and well-grounded in the literature — SIP2 is indeed a beta-subunit of the Snf1/AMPK complex, and there is published evidence (e.g., Ashrafi et al.) suggesting SIP2 overexpression extends replicative lifespan. However, the GenAge database classifies SIP2's longevity influence as \"unclear,\" suggesting the evidence is ambiguous or contested. The model was overconfident in assigning a definitive \"pro_longevity\" classification when the curated database considers the evidence unclear. The mechanistic description itself is plausible and largely accurate, but the conclusion drawn from it is too definitive given the actual state of evidence.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": true,
"reasoning_quality": 4,
"ground_truth_questionable": true
}