rho2
S. pombe
Rho family GTPase Rho2
What the model saw
Gene: rho2 Organism: Schizosaccharomyces pombe Known functions: Rho family GTPase Rho2. GTP binding. GTPase activity. protein binding. protein kinase binding. protein serine/threonine kinase activator activity.
View unredacted entry
Rho family GTPase Rho2. GTP binding. GTPase activity. protein binding. protein kinase binding. protein serine/threonine kinase activator activity.
Solver output
Rho2 is a Rho-family small GTPase in S. pombe that activates protein serine/threonine kinases, most notably Pck1 and Pck2 (PKC homologs), which feed into the cell wall integrity (CWI) MAPK pathway. This pathway converges on the Pmk1 MAPK cascade, which shares signaling logic with TOR/stress-response networks that modulate chronological lifespan. As a GTPase-based activator of downstream kinase signaling, Rho2 in its active (GTP-bound) state promotes anabolic and stress-response kinase cascades; constitutive or elevated Rho2 signaling through PKC-MAPK is associated with increased cellular stress signaling and reduced chronological lifespan in yeast models. Rho GTPase overactivation generally antagonizes quiescence and stress resistance programs that are pro-longevity, paralleling the anti-longevity role of hyperactive Ras/TOR signaling. Thus, the normal pro-growth, kinase-activating function of Rho2 is predicted to oppose 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 correctly predicted anti_longevity for rho2 in S. pombe. The mechanistic reasoning is plausible and largely accurate - Rho2 does activate Pck1/Pck2 (PKC homologs) and feeds into the cell wall integrity MAPK pathway via Pmk1. The connection to TOR/nutrient sensing is somewhat speculative and indirect, but the core mechanism (Rho2 as a pro-growth GTPase activating kinase cascades that oppose longevity) is reasonable. The model appropriately noted moderate confidence (0.62), reflecting some uncertainty. The reasoning quality is good but not perfect - the TOR connection is a stretch and the mechanism_class "deregulated_nutrient_sensing" is not the most precise description for a cell wall integrity pathway activator.
Raw API responses
solver
{
"reasoning": "Rho2 is a Rho-family small GTPase in S. pombe that activates protein serine/threonine kinases, most notably Pck1 and Pck2 (PKC homologs), which feed into the cell wall integrity (CWI) MAPK pathway. This pathway converges on the Pmk1 MAPK cascade, which shares signaling logic with TOR/stress-response networks that modulate chronological lifespan. As a GTPase-based activator of downstream kinase signaling, Rho2 in its active (GTP-bound) state promotes anabolic and stress-response kinase cascades; constitutive or elevated Rho2 signaling through PKC-MAPK is associated with increased cellular stress signaling and reduced chronological lifespan in yeast models. Rho GTPase overactivation generally antagonizes quiescence and stress resistance programs that are pro-longevity, paralleling the anti-longevity role of hyperactive Ras/TOR signaling. Thus, the normal pro-growth, kinase-activating function of Rho2 is predicted to oppose longevity.",
"confidence": 0.62,
"key_pathways": [
"Rho2-PKC (Pck1/Pck2) cell wall integrity MAPK cascade",
"Pmk1 MAPK signaling",
"TOR/stress-response nutrient sensing"
],
"mechanism_class": "deregulated_nutrient_sensing",
"longevity_influence": "anti_longevity"
}advisor
{
"notes": "The model correctly predicted anti_longevity for rho2 in S. pombe. The mechanistic reasoning is plausible and largely accurate - Rho2 does activate Pck1/Pck2 (PKC homologs) and feeds into the cell wall integrity MAPK pathway via Pmk1. The connection to TOR/nutrient sensing is somewhat speculative and indirect, but the core mechanism (Rho2 as a pro-growth GTPase activating kinase cascades that oppose longevity) is reasonable. The model appropriately noted moderate confidence (0.62), reflecting some uncertainty. The reasoning quality is good but not perfect - the TOR connection is a stretch and the mechanism_class \"deregulated_nutrient_sensing\" is not the most precise description for a cell wall integrity pathway activator.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 4,
"ground_truth_questionable": false
}