msh3
S. pombe
DNA mismatch repair protein
What the model saw
Gene: msh3 Organism: Schizosaccharomyces pombe Known functions: DNA mismatch repair protein. ATP binding. ATP hydrolysis activity. ATP-dependent DNA damage sensor activity. Y-form DNA binding. double-strand/single-strand DNA junction binding. double-stranded DNA binding. heteroduplex DNA loop binding. mismatched DNA binding.
View unredacted entry
DNA mismatch repair protein. ATP binding. ATP hydrolysis activity. ATP-dependent DNA damage sensor activity. Y-form DNA binding. double-strand/single-strand DNA junction binding. double-stranded DNA binding. heteroduplex DNA loop binding. mismatched DNA binding.
Solver output
Msh3 is a MutS homolog that forms part of the MutSβ complex (with Msh2), which recognizes and initiates repair of insertion/deletion loops (IDLs) and heteroduplex DNA loops arising during replication or recombination. By binding mismatched and looped-out DNA structures (including Y-form and double-strand/single-strand junctions) and using ATP hydrolysis to drive mismatch recognition and downstream repair signaling, Msh3 directly suppresses the accumulation of somatic mutations and microsatellite instability. Failure of this DNA mismatch repair (MMR) pathway leads to progressive genomic instability, a primary hallmark of aging. In model organisms, loss of MMR components accelerates mutation accumulation and shortens lifespan, while intact MMR preserves genome integrity and supports longevity. Therefore, the normal function of msh3 is pro-longevity through its essential role in the MMR pathway.
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 follows a logical but incorrect assumption that DNA mismatch repair genes are universally pro-longevity. In S. pombe, msh3 is classified as anti_longevity, meaning its activity actually reduces lifespan rather than extending it. This could be because MMR components like Msh3 can trigger apoptosis or cell cycle arrest in response to DNA damage, which in yeast can reduce chronological or replicative lifespan. The model confidently applied a general principle (MMR = pro-longevity) without considering organism-specific or gene-specific nuances. The mechanistic reasoning is also incorrect in this context - the model assumed loss of MMR shortens lifespan, but the GenAge classification indicates the opposite for msh3 in S. pombe. The model showed high confidence (0.78) in an incorrect answer.
Raw API responses
solver
{
"reasoning": "Msh3 is a MutS homolog that forms part of the MutSβ complex (with Msh2), which recognizes and initiates repair of insertion/deletion loops (IDLs) and heteroduplex DNA loops arising during replication or recombination. By binding mismatched and looped-out DNA structures (including Y-form and double-strand/single-strand junctions) and using ATP hydrolysis to drive mismatch recognition and downstream repair signaling, Msh3 directly suppresses the accumulation of somatic mutations and microsatellite instability. Failure of this DNA mismatch repair (MMR) pathway leads to progressive genomic instability, a primary hallmark of aging. In model organisms, loss of MMR components accelerates mutation accumulation and shortens lifespan, while intact MMR preserves genome integrity and supports longevity. Therefore, the normal function of msh3 is pro-longevity through its essential role in the MMR pathway.",
"confidence": 0.78,
"key_pathways": [
"DNA mismatch repair (MMR) / MutSβ complex",
"ATP-dependent DNA damage sensing",
"Insertion-deletion loop (IDL) repair"
],
"mechanism_class": "genomic_instability",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted pro_longevity but the ground truth is anti_longevity. The model's reasoning follows a logical but incorrect assumption that DNA mismatch repair genes are universally pro-longevity. In S. pombe, msh3 is classified as anti_longevity, meaning its activity actually reduces lifespan rather than extending it. This could be because MMR components like Msh3 can trigger apoptosis or cell cycle arrest in response to DNA damage, which in yeast can reduce chronological or replicative lifespan. The model confidently applied a general principle (MMR = pro-longevity) without considering organism-specific or gene-specific nuances. The mechanistic reasoning is also incorrect in this context - the model assumed loss of MMR shortens lifespan, but the GenAge classification indicates the opposite for msh3 in S. pombe. The model showed high confidence (0.78) in an incorrect answer.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 2,
"ground_truth_questionable": false
}