Top3b
M. musculus
topoisomerase (DNA) III beta
What the model saw
Gene: Top3b Organism: Mus musculus Known functions: topoisomerase (DNA) III beta. DNA topoisomerase 3-beta-1. DNA binding. DNA topoisomerase activity. DNA topoisomerase type I (single strand cut, ATP-independent) activity. RNA topoisomerase activity.
View unredacted entry
topoisomerase (DNA) III beta. DNA topoisomerase 3-beta-1. DNA binding. DNA topoisomerase activity. DNA topoisomerase type I (single strand cut, ATP-independent) activity. RNA topoisomerase activity.
Solver output
Top3b encodes DNA topoisomerase III beta, a type IA topoisomerase that resolves topological stress in both DNA and RNA by introducing transient single-strand breaks. Its DNA topoisomerase activity is critical for resolving R-loops, double Holliday junctions, and supercoiling intermediates that arise during replication and transcription, thereby suppressing genomic instability. Loss of Top3b in mice leads to accumulation of DNA damage, premature aging phenotypes, and reduced lifespan, consistent with a pro-longevity role. Additionally, its RNA topoisomerase activity (acting in concert with FMRP/TDRD3) resolves RNA secondary structures important for neuronal mRNA translation, and Top3b-null mice show neurodegeneration-like defects. Maintenance of both genomic and transcriptomic integrity by Top3b thus opposes key drivers of aging, placing it firmly in the genomic instability hallmark.
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 pro_longevity for Top3b in mice. The mechanistic reasoning is sound - Top3b as a DNA/RNA topoisomerase maintains genomic and transcriptomic integrity, and loss-of-function leads to premature aging phenotypes and reduced lifespan. The model correctly identifies the genomic instability hallmark and mentions the RNA topoisomerase activity with FMRP/TDRD3. The confidence of 0.62 is reasonable. The reasoning about R-loop suppression and double Holliday junction resolution is biologically plausible for a type IA topoisomerase. Overall a well-reasoned and correct prediction.
Raw API responses
solver
{
"reasoning": "Top3b encodes DNA topoisomerase III beta, a type IA topoisomerase that resolves topological stress in both DNA and RNA by introducing transient single-strand breaks. Its DNA topoisomerase activity is critical for resolving R-loops, double Holliday junctions, and supercoiling intermediates that arise during replication and transcription, thereby suppressing genomic instability. Loss of Top3b in mice leads to accumulation of DNA damage, premature aging phenotypes, and reduced lifespan, consistent with a pro-longevity role. Additionally, its RNA topoisomerase activity (acting in concert with FMRP/TDRD3) resolves RNA secondary structures important for neuronal mRNA translation, and Top3b-null mice show neurodegeneration-like defects. Maintenance of both genomic and transcriptomic integrity by Top3b thus opposes key drivers of aging, placing it firmly in the genomic instability hallmark.",
"confidence": 0.62,
"key_pathways": [
"DNA topology resolution and genomic stability",
"R-loop suppression during replication and transcription",
"RNA topoisomerase activity in neuronal mRNA regulation"
],
"mechanism_class": "genomic_instability",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity for Top3b in mice. The mechanistic reasoning is sound - Top3b as a DNA/RNA topoisomerase maintains genomic and transcriptomic integrity, and loss-of-function leads to premature aging phenotypes and reduced lifespan. The model correctly identifies the genomic instability hallmark and mentions the RNA topoisomerase activity with FMRP/TDRD3. The confidence of 0.62 is reasonable. The reasoning about R-loop suppression and double Holliday junction resolution is biologically plausible for a type IA topoisomerase. Overall a well-reasoned and correct prediction.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 4,
"ground_truth_questionable": false
}