mrc1
S. pombe
claspin
What the model saw
Gene: mrc1 Organism: Schizosaccharomyces pombe Known functions: claspin. 3'-flap-structured DNA binding. D-loop DNA binding. H3-H4 histone complex chaperone activity. Y-form DNA binding. anaphase-promoting complex binding. bubble DNA binding. double-stranded DNA binding. protein binding. signaling adaptor activity.
View unredacted entry
claspin. 3'-flap-structured DNA binding. D-loop DNA binding. H3-H4 histone complex chaperone activity. Y-form DNA binding. anaphase-promoting complex binding. bubble DNA binding. double-stranded DNA binding. protein binding. signaling adaptor activity.
Solver output
mrc1 encodes Claspin in S. pombe, a key mediator/adaptor protein in the replication checkpoint pathway. It binds replication fork-associated DNA structures (Y-form, bubble, D-loop, 3'-flap DNA) and acts as a signaling adaptor to activate Cds1/Chk2 kinase in response to replication stress, thereby stabilizing stalled replication forks and preventing genomic instability. Its H3-H4 histone chaperone activity further supports chromatin integrity during replication. Additionally, its interaction with the anaphase-promoting complex (APC/C) links replication checkpoint signaling to cell cycle control. By preserving replication fork integrity and activating the DNA damage checkpoint, mrc1 suppresses the accumulation of mutations and chromosomal aberrations—a hallmark of aging—thereby promoting longevity.
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 with 0.72 confidence, but the ground truth is anti_longevity. The model's reasoning about mrc1/Claspin's role in DNA replication checkpoint signaling and genomic stability is mechanistically plausible in general terms, but it led to the wrong conclusion. In S. pombe, mrc1 deletion or loss-of-function studies apparently show extended lifespan, making it anti_longevity (i.e., its presence shortens life). The model assumed that a DNA damage checkpoint mediator would be pro_longevity by preventing genomic instability, but this is incorrect for mrc1 in S. pombe. The reasoning quality is moderate - the model correctly identified the gene's molecular functions but failed to account for the actual experimental evidence showing that mrc1 acts as anti_longevity in this organism.
Raw API responses
solver
{
"reasoning": "mrc1 encodes Claspin in S. pombe, a key mediator/adaptor protein in the replication checkpoint pathway. It binds replication fork-associated DNA structures (Y-form, bubble, D-loop, 3'-flap DNA) and acts as a signaling adaptor to activate Cds1/Chk2 kinase in response to replication stress, thereby stabilizing stalled replication forks and preventing genomic instability. Its H3-H4 histone chaperone activity further supports chromatin integrity during replication. Additionally, its interaction with the anaphase-promoting complex (APC/C) links replication checkpoint signaling to cell cycle control. By preserving replication fork integrity and activating the DNA damage checkpoint, mrc1 suppresses the accumulation of mutations and chromosomal aberrations—a hallmark of aging—thereby promoting longevity.",
"confidence": 0.72,
"key_pathways": [
"DNA replication stress checkpoint (Rad3-Mrc1-Cds1 signaling axis)",
"Replication fork stabilization and protection",
"Histone H3-H4 chaperone-mediated chromatin integrity"
],
"mechanism_class": "genomic_instability",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model predicted pro_longevity with 0.72 confidence, but the ground truth is anti_longevity. The model's reasoning about mrc1/Claspin's role in DNA replication checkpoint signaling and genomic stability is mechanistically plausible in general terms, but it led to the wrong conclusion. In S. pombe, mrc1 deletion or loss-of-function studies apparently show extended lifespan, making it anti_longevity (i.e., its presence shortens life). The model assumed that a DNA damage checkpoint mediator would be pro_longevity by preventing genomic instability, but this is incorrect for mrc1 in S. pombe. The reasoning quality is moderate - the model correctly identified the gene's molecular functions but failed to account for the actual experimental evidence showing that mrc1 acts as anti_longevity in this organism.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": false,
"reasoning_quality": 3,
"ground_truth_questionable": false
}