TCB3
S. cerevisiae
Tcb3p
What the model saw
Gene: TCB3 Organism: Saccharomyces cerevisiae Known functions: Tcb3p. lipid binding. phospholipid binding.
View unredacted entry
Tcb3p. lipid binding. phospholipid binding.
Solver output
TCB3 (Tcb3p) is a yeast tricalbin protein with lipid binding and phospholipid binding activity, functioning at ER-plasma membrane contact sites to facilitate lipid transfer between membranes. While membrane lipid homeostasis is important for cellular function and aging, the specific role of TCB3 in longevity is ambiguous: lipid transfer at contact sites can influence membrane composition, stress responses, and calcium signaling, but loss or gain of TCB3 function does not map cleanly to a pro- or anti-longevity outcome based solely on these annotations. The tricalbins collectively regulate phospholipid distribution, but redundancy among family members (TCB1, TCB2, TCB3) and the lack of a direct mechanistic link to a defined aging pathway makes a confident directional prediction difficult.
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 "unclear" with low confidence (0.35), but the ground truth is "anti_longevity." The model correctly identified TCB3's role in lipid binding and ER-plasma membrane contact sites, and acknowledged redundancy among tricalbin family members. However, it failed to commit to a directional prediction. The reasoning about redundancy and lack of direct mechanistic link to aging is plausible but ultimately led to an incorrect non-answer. The model's uncertainty was somewhat reasonable given the limited annotations provided, but the ground truth is clearly anti_longevity, meaning deletion of TCB3 likely extends lifespan. The model's mechanistic discussion was generic and didn't identify the specific anti-longevity mechanism.
Raw API responses
solver
{
"reasoning": "TCB3 (Tcb3p) is a yeast tricalbin protein with lipid binding and phospholipid binding activity, functioning at ER-plasma membrane contact sites to facilitate lipid transfer between membranes. While membrane lipid homeostasis is important for cellular function and aging, the specific role of TCB3 in longevity is ambiguous: lipid transfer at contact sites can influence membrane composition, stress responses, and calcium signaling, but loss or gain of TCB3 function does not map cleanly to a pro- or anti-longevity outcome based solely on these annotations. The tricalbins collectively regulate phospholipid distribution, but redundancy among family members (TCB1, TCB2, TCB3) and the lack of a direct mechanistic link to a defined aging pathway makes a confident directional prediction difficult.",
"confidence": 0.35,
"key_pathways": [
"ER-plasma membrane contact site lipid transfer",
"phospholipid homeostasis",
"membrane lipid composition regulation"
],
"mechanism_class": "other",
"longevity_influence": "unclear"
}advisor
{
"notes": "The model predicted \"unclear\" with low confidence (0.35), but the ground truth is \"anti_longevity.\" The model correctly identified TCB3's role in lipid binding and ER-plasma membrane contact sites, and acknowledged redundancy among tricalbin family members. However, it failed to commit to a directional prediction. The reasoning about redundancy and lack of direct mechanistic link to aging is plausible but ultimately led to an incorrect non-answer. The model's uncertainty was somewhat reasonable given the limited annotations provided, but the ground truth is clearly anti_longevity, meaning deletion of TCB3 likely extends lifespan. The model's mechanistic discussion was generic and didn't identify the specific anti-longevity mechanism.",
"failure_mode": "appropriately_uncertain",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}