RIF1
S. cerevisiae
DNA-binding protein RIF1
What the model saw
Gene: RIF1 Organism: Saccharomyces cerevisiae Known functions: DNA-binding protein RIF1. DNA replication origin binding. RNA polymerase II core promoter sequence-specific DNA binding. centromeric DNA binding. protein binding. telomeric repeat DNA binding.
View unredacted entry
DNA-binding protein RIF1. DNA replication origin binding. RNA polymerase II core promoter sequence-specific DNA binding. centromeric DNA binding. protein binding. telomeric repeat DNA binding.
Solver output
RIF1 (Rap1-Interacting Factor 1) in S. cerevisiae binds telomeric repeat DNA and is a key negative regulator of telomere length, acting downstream of Rap1 to cap telomeres and suppress telomerase-mediated elongation. By maintaining proper telomere length homeostasis and protecting telomere integrity, RIF1 prevents the genomic instability and cellular senescence that arise from uncapped or excessively elongated telomeres. Additionally, RIF1's binding to DNA replication origins contributes to replication timing control, which is important for genome stability. Loss of RIF1 leads to telomere elongation and dysregulation, which is associated with accelerated replicative aging in yeast. Its role in centromeric DNA binding further supports chromosomal stability during cell division.
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 RIF1 as pro_longevity in S. cerevisiae. The mechanistic reasoning is sound: RIF1 is indeed a key component of the Rap1-Rif1-Rif2 telomere capping complex that negatively regulates telomere length and maintains telomere integrity. Loss of RIF1 leads to telomere elongation and genomic instability, which is associated with accelerated replicative aging. The model also correctly notes RIF1's role in DNA replication origin control. The reasoning is well-grounded in known yeast biology. Confidence of 0.65 is appropriate given the complexity of the relationship. Minor note: the claim that "loss of RIF1 leads to accelerated replicative aging" is the key mechanistic link that supports pro_longevity classification, and this is correctly identified.
Raw API responses
solver
{
"reasoning": "RIF1 (Rap1-Interacting Factor 1) in S. cerevisiae binds telomeric repeat DNA and is a key negative regulator of telomere length, acting downstream of Rap1 to cap telomeres and suppress telomerase-mediated elongation. By maintaining proper telomere length homeostasis and protecting telomere integrity, RIF1 prevents the genomic instability and cellular senescence that arise from uncapped or excessively elongated telomeres. Additionally, RIF1's binding to DNA replication origins contributes to replication timing control, which is important for genome stability. Loss of RIF1 leads to telomere elongation and dysregulation, which is associated with accelerated replicative aging in yeast. Its role in centromeric DNA binding further supports chromosomal stability during cell division.",
"confidence": 0.65,
"key_pathways": [
"telomere length regulation via Rap1-Rif1-Rif2 complex",
"DNA replication origin firing control",
"centromere integrity and chromosome segregation"
],
"mechanism_class": "telomere_attrition",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted RIF1 as pro_longevity in S. cerevisiae. The mechanistic reasoning is sound: RIF1 is indeed a key component of the Rap1-Rif1-Rif2 telomere capping complex that negatively regulates telomere length and maintains telomere integrity. Loss of RIF1 leads to telomere elongation and genomic instability, which is associated with accelerated replicative aging. The model also correctly notes RIF1's role in DNA replication origin control. The reasoning is well-grounded in known yeast biology. Confidence of 0.65 is appropriate given the complexity of the relationship. Minor note: the claim that \"loss of RIF1 leads to accelerated replicative aging\" is the key mechanistic link that supports pro_longevity classification, and this is correctly identified.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 4,
"ground_truth_questionable": false
}