RGS2
S. cerevisiae
GTPase-activating protein RGS2
What the model saw
Gene: RGS2 Organism: Saccharomyces cerevisiae Known functions: GTPase-activating protein RGS2. GTPase activator activity.
View unredacted entry
GTPase-activating protein RGS2. GTPase activator activity.
Solver output
RGS2 (Regulator of G-protein Signaling 2) functions as a GTPase-activating protein (GAP) that accelerates GTP hydrolysis on Gα subunits, thereby attenuating G-protein coupled signaling. In S. cerevisiae, RGS2 (also known as Rgs2/Sst2-related) acts as a negative regulator of Gpa2, the Gα subunit that couples nutrient sensing to the cAMP-PKA pathway. By stimulating GTPase activity of Gpa2, RGS2 dampens cAMP-PKA signaling, which is a major pro-aging pathway in yeast. Reduced PKA activity is well established to extend chronological and replicative lifespan in yeast by promoting stress resistance, autophagy, and metabolic reprogramming. Thus, RGS2's GAP activity on the nutrient-sensing G-protein axis places it as a negative regulator of the pro-aging cAMP-PKA pathway, consistent with a pro-longevity role.
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 about RGS2 as a GAP for Gpa2 that dampens cAMP-PKA signaling sounds plausible in principle, but it arrives at the wrong conclusion. In S. cerevisiae, RGS2 is actually anti-longevity, meaning its activity shortens lifespan rather than extending it. The model's mechanistic reasoning is also likely incorrect - in yeast, the relevant RGS protein for Gpa2 is Rgs2 (which is actually the same as Sst2 for the pheromone pathway), and the actual role of RGS2 in yeast longevity may involve different mechanisms than what the model describes. The model constructed a plausible-sounding but ultimately incorrect narrative about how RGS2 would extend lifespan by dampening PKA signaling, when in reality it has the opposite effect on longevity. The confidence of 0.62 is moderate but the reasoning confidently points in the wrong direction.
Raw API responses
solver
{
"reasoning": "RGS2 (Regulator of G-protein Signaling 2) functions as a GTPase-activating protein (GAP) that accelerates GTP hydrolysis on Gα subunits, thereby attenuating G-protein coupled signaling. In S. cerevisiae, RGS2 (also known as Rgs2/Sst2-related) acts as a negative regulator of Gpa2, the Gα subunit that couples nutrient sensing to the cAMP-PKA pathway. By stimulating GTPase activity of Gpa2, RGS2 dampens cAMP-PKA signaling, which is a major pro-aging pathway in yeast. Reduced PKA activity is well established to extend chronological and replicative lifespan in yeast by promoting stress resistance, autophagy, and metabolic reprogramming. Thus, RGS2's GAP activity on the nutrient-sensing G-protein axis places it as a negative regulator of the pro-aging cAMP-PKA pathway, consistent with a pro-longevity role.",
"confidence": 0.62,
"key_pathways": [
"cAMP-PKA signaling",
"G-protein coupled nutrient sensing (Gpa2/cAMP axis)",
"Ras/PKA pathway attenuation"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted pro_longevity but the ground truth is anti_longevity. The model's reasoning about RGS2 as a GAP for Gpa2 that dampens cAMP-PKA signaling sounds plausible in principle, but it arrives at the wrong conclusion. In S. cerevisiae, RGS2 is actually anti-longevity, meaning its activity shortens lifespan rather than extending it. The model's mechanistic reasoning is also likely incorrect - in yeast, the relevant RGS protein for Gpa2 is Rgs2 (which is actually the same as Sst2 for the pheromone pathway), and the actual role of RGS2 in yeast longevity may involve different mechanisms than what the model describes. The model constructed a plausible-sounding but ultimately incorrect narrative about how RGS2 would extend lifespan by dampening PKA signaling, when in reality it has the opposite effect on longevity. The confidence of 0.62 is moderate but the reasoning confidently points in the wrong direction.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}