DNA2
S. cerevisiae
bifunctional ATP-dependent DNA helicase/ssDNA endodeoxyribonuclease DNA2
What the model saw
Gene: DNA2 Organism: Saccharomyces cerevisiae Known functions: bifunctional ATP-dependent DNA helicase/ssDNA endodeoxyribonuclease DNA2. 4 iron, 4 sulfur cluster binding. 5'-3' DNA helicase activity. 5'-flap endonuclease activity. ATP hydrolysis activity. DNA hairpin binding. DNA helicase activity. RNA binding. four-way junction DNA binding. helicase activity. nuclease activity. protein binding. protein serine/threonine kinase activator activity. single-stranded DNA endonuclease activity. single-stranded DNA helicase activity. telomeric G-quadruplex DNA binding.
View unredacted entry
bifunctional ATP-dependent DNA helicase/ssDNA endodeoxyribonuclease DNA2. 4 iron, 4 sulfur cluster binding. 5'-3' DNA helicase activity. 5'-flap endonuclease activity. ATP hydrolysis activity. DNA hairpin binding. DNA helicase activity. RNA binding. four-way junction DNA binding. helicase activity. nuclease activity. protein binding. protein serine/threonine kinase activator activity. single-stranded DNA endonuclease activity. single-stranded DNA helicase activity. telomeric G-quadruplex DNA binding.
Solver output
DNA2 encodes a bifunctional helicase/nuclease that is essential for multiple genome maintenance pathways in S. cerevisiae. Its 5'-flap endonuclease activity is critical for Okazaki fragment processing during DNA replication, preventing the accumulation of unprocessed flap structures that would cause replication stress and mutations. Its helicase and nuclease activities also participate in long-range resection of double-strand break ends during homologous recombination repair, facilitating error-free DSB repair. Additionally, DNA2 binds telomeric G-quadruplex DNA and contributes to telomere maintenance, directly opposing telomere attrition. Loss of DNA2 function leads to severe genomic instability, replication defects, and accelerated aging phenotypes, while its normal activity suppresses the accumulation of DNA damage that drives aging.
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 DNA2 as pro_longevity with high confidence (0.82). The mechanistic reasoning is thorough and accurate: DNA2's roles in Okazaki fragment processing (5'-flap endonuclease), DSB end resection via homologous recombination, and telomere maintenance are all well-established functions. The model correctly identifies that loss of DNA2 leads to genomic instability and accelerated aging phenotypes, making it pro-longevity when functional. The reasoning is well-grounded in the known biology of DNA2 in S. cerevisiae.
Raw API responses
solver
{
"reasoning": "DNA2 encodes a bifunctional helicase/nuclease that is essential for multiple genome maintenance pathways in S. cerevisiae. Its 5'-flap endonuclease activity is critical for Okazaki fragment processing during DNA replication, preventing the accumulation of unprocessed flap structures that would cause replication stress and mutations. Its helicase and nuclease activities also participate in long-range resection of double-strand break ends during homologous recombination repair, facilitating error-free DSB repair. Additionally, DNA2 binds telomeric G-quadruplex DNA and contributes to telomere maintenance, directly opposing telomere attrition. Loss of DNA2 function leads to severe genomic instability, replication defects, and accelerated aging phenotypes, while its normal activity suppresses the accumulation of DNA damage that drives aging.",
"confidence": 0.82,
"key_pathways": [
"Okazaki fragment maturation / DNA replication fidelity",
"Homologous recombination DSB end resection",
"Telomere maintenance and G-quadruplex resolution"
],
"mechanism_class": "genomic_instability",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted DNA2 as pro_longevity with high confidence (0.82). The mechanistic reasoning is thorough and accurate: DNA2's roles in Okazaki fragment processing (5'-flap endonuclease), DSB end resection via homologous recombination, and telomere maintenance are all well-established functions. The model correctly identifies that loss of DNA2 leads to genomic instability and accelerated aging phenotypes, making it pro-longevity when functional. The reasoning is well-grounded in the known biology of DNA2 in S. cerevisiae.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 5,
"ground_truth_questionable": false
}