lin-5
C. elegans
Spindle apparatus protein lin-5
What the model saw
Gene: lin-5 Organism: Caenorhabditis elegans Known functions: Spindle apparatus protein lin-5. cytoskeletal protein-membrane anchor activity. dynein complex binding. protein binding.
View unredacted entry
Spindle apparatus protein lin-5. cytoskeletal protein-membrane anchor activity. dynein complex binding. protein binding.
Solver output
LIN-5 is a spindle apparatus protein (NuMA homolog) in C. elegans that functions as a cortical anchor for the dynein complex during mitosis, orienting the mitotic spindle and enabling asymmetric cell division. Proper spindle orientation is critical for stem cell self-renewal versus differentiation decisions; loss of correct spindle positioning leads to aberrant cell fate specification and stem cell exhaustion over time. By anchoring dynein to the cell cortex via its cytoskeletal protein-membrane anchor activity, LIN-5 ensures faithful asymmetric divisions in germline and somatic stem cells, supporting tissue homeostasis and organismal longevity. Disruption of LIN-5 function impairs chromosome segregation fidelity, which can also contribute to genomic instability. Its normal function in maintaining accurate mitotic spindle orientation thus supports stem cell maintenance and opposes premature aging phenotypes.
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 reasoned that LIN-5's role in spindle orientation supports stem cell maintenance and tissue homeostasis, thus promoting longevity. However, the actual classification is anti_longevity, meaning loss of lin-5 function likely extends lifespan (or overexpression reduces it). This is consistent with the known biology where reducing mitotic activity or germline proliferation in C. elegans can extend lifespan. The model's mechanistic reasoning about stem cell exhaustion is speculative and inverted - it assumed normal function = pro-longevity, but in C. elegans, genes involved in germline proliferation and cell division are often anti-longevity (their loss extends lifespan). The model's confidence of 0.55 is relatively low, but it still got the direction wrong. The reasoning quality is poor because it failed to consider the well-established C. elegans paradigm where germline proliferation genes tend to be anti-longevity.
Raw API responses
solver
{
"reasoning": "LIN-5 is a spindle apparatus protein (NuMA homolog) in C. elegans that functions as a cortical anchor for the dynein complex during mitosis, orienting the mitotic spindle and enabling asymmetric cell division. Proper spindle orientation is critical for stem cell self-renewal versus differentiation decisions; loss of correct spindle positioning leads to aberrant cell fate specification and stem cell exhaustion over time. By anchoring dynein to the cell cortex via its cytoskeletal protein-membrane anchor activity, LIN-5 ensures faithful asymmetric divisions in germline and somatic stem cells, supporting tissue homeostasis and organismal longevity. Disruption of LIN-5 function impairs chromosome segregation fidelity, which can also contribute to genomic instability. Its normal function in maintaining accurate mitotic spindle orientation thus supports stem cell maintenance and opposes premature aging phenotypes.",
"confidence": 0.55,
"key_pathways": [
"mitotic spindle orientation and asymmetric cell division",
"dynein-mediated cortical force generation",
"stem cell self-renewal and tissue homeostasis"
],
"mechanism_class": "stem_cell_exhaustion",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted pro_longevity but the ground truth is anti_longevity. The model reasoned that LIN-5's role in spindle orientation supports stem cell maintenance and tissue homeostasis, thus promoting longevity. However, the actual classification is anti_longevity, meaning loss of lin-5 function likely extends lifespan (or overexpression reduces it). This is consistent with the known biology where reducing mitotic activity or germline proliferation in C. elegans can extend lifespan. The model's mechanistic reasoning about stem cell exhaustion is speculative and inverted - it assumed normal function = pro-longevity, but in C. elegans, genes involved in germline proliferation and cell division are often anti-longevity (their loss extends lifespan). The model's confidence of 0.55 is relatively low, but it still got the direction wrong. The reasoning quality is poor because it failed to consider the well-established C. elegans paradigm where germline proliferation genes tend to be anti-longevity.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}