SLX8
S. cerevisiae
SUMO-targeted ubiquitin ligase complex subunit SLX8
What the model saw
Gene: SLX8 Organism: Saccharomyces cerevisiae Known functions: SUMO-targeted ubiquitin ligase complex subunit SLX8. metal ion binding. protein binding. ubiquitin protein ligase activity. ubiquitin-protein transferase activity. zinc ion binding.
View unredacted entry
SUMO-targeted ubiquitin ligase complex subunit SLX8. metal ion binding. protein binding. ubiquitin protein ligase activity. ubiquitin-protein transferase activity. zinc ion binding.
Solver output
SLX8 is a subunit of the SUMO-targeted ubiquitin ligase (STUbL) complex (Slx5-Slx8 in yeast), which recognizes poly-SUMOylated substrates and targets them for ubiquitin-mediated proteasomal degradation. This activity is critical for resolving aberrant SUMO conjugates that accumulate at sites of DNA damage and stalled replication forks, thereby maintaining genome integrity. Loss of SLX8 leads to accumulation of toxic SUMO conjugates, increased DNA damage sensitivity, and genomic instability — hallmarks associated with shortened lifespan. Additionally, STUbL activity contributes to proteostasis by clearing misfolded or aggregated SUMOylated proteins, linking SLX8 to both genomic stability and protein quality control. Its zinc ion binding (RING domain) is the catalytic basis for its E3 ubiquitin ligase activity, directly enabling ubiquitylation of SUMOylated targets.
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 identifies SLX8's role as a SUMO-targeted ubiquitin ligase (STUbL) subunit and accurately describes its molecular mechanism (targeting poly-SUMOylated substrates for proteasomal degradation, maintaining genome integrity). However, the model predicts "pro_longevity" while the ground truth is "anti_longevity." The model's reasoning that loss of SLX8 leads to genomic instability and shortened lifespan would logically support a pro_longevity classification, but the GenAge database classifies it as anti_longevity — meaning deletion/loss of SLX8 actually extends lifespan. This is a case where the mechanistic description is largely accurate, but the model drew the wrong conclusion about the direction of the longevity effect. The model was fairly confident (0.72) in its incorrect prediction. In yeast chronological or replicative lifespan studies, deletion of SLX8 can extend lifespan, possibly because reducing STUbL activity alters SUMO dynamics in ways that are beneficial, or because the model organism context differs from the model's assumptions.
Raw API responses
solver
{
"reasoning": "SLX8 is a subunit of the SUMO-targeted ubiquitin ligase (STUbL) complex (Slx5-Slx8 in yeast), which recognizes poly-SUMOylated substrates and targets them for ubiquitin-mediated proteasomal degradation. This activity is critical for resolving aberrant SUMO conjugates that accumulate at sites of DNA damage and stalled replication forks, thereby maintaining genome integrity. Loss of SLX8 leads to accumulation of toxic SUMO conjugates, increased DNA damage sensitivity, and genomic instability — hallmarks associated with shortened lifespan. Additionally, STUbL activity contributes to proteostasis by clearing misfolded or aggregated SUMOylated proteins, linking SLX8 to both genomic stability and protein quality control. Its zinc ion binding (RING domain) is the catalytic basis for its E3 ubiquitin ligase activity, directly enabling ubiquitylation of SUMOylated targets.",
"confidence": 0.72,
"key_pathways": [
"SUMO-targeted ubiquitin ligase (STUbL) pathway",
"DNA damage response and genome integrity maintenance",
"Ubiquitin-proteasome protein quality control"
],
"mechanism_class": "genomic_instability",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly identifies SLX8's role as a SUMO-targeted ubiquitin ligase (STUbL) subunit and accurately describes its molecular mechanism (targeting poly-SUMOylated substrates for proteasomal degradation, maintaining genome integrity). However, the model predicts \"pro_longevity\" while the ground truth is \"anti_longevity.\" The model's reasoning that loss of SLX8 leads to genomic instability and shortened lifespan would logically support a pro_longevity classification, but the GenAge database classifies it as anti_longevity — meaning deletion/loss of SLX8 actually extends lifespan. This is a case where the mechanistic description is largely accurate, but the model drew the wrong conclusion about the direction of the longevity effect. The model was fairly confident (0.72) in its incorrect prediction. In yeast chronological or replicative lifespan studies, deletion of SLX8 can extend lifespan, possibly because reducing STUbL activity alters SUMO dynamics in ways that are beneficial, or because the model organism context differs from the model's assumptions.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": true,
"reasoning_quality": 3,
"ground_truth_questionable": false
}