Mcm2
M. musculus
minichromosome maintenance complex component 2
What the model saw
Gene: Mcm2 Organism: Mus musculus Known functions: minichromosome maintenance complex component 2. DNA replication licensing factor MCM2. 3'-5' DNA helicase activity. ATP binding. ATP hydrolysis activity. DNA binding. DNA helicase activity. DNA replication origin binding. enzyme binding. histone binding. protein binding. single-stranded DNA binding. single-stranded DNA helicase activity.
View unredacted entry
minichromosome maintenance complex component 2. DNA replication licensing factor MCM2. 3'-5' DNA helicase activity. ATP binding. ATP hydrolysis activity. DNA binding. DNA helicase activity. DNA replication origin binding. enzyme binding. histone binding. protein binding. single-stranded DNA binding. single-stranded DNA helicase activity.
Solver output
MCM2 is a core subunit of the MCM2-7 replicative helicase complex, which is essential for DNA replication licensing — the process that ensures each origin of replication fires exactly once per cell cycle. Its 3'-5' DNA helicase and ATPase activities are required for unwinding duplex DNA at replication forks, preventing under-replication and replication stress. Loss or hypomorphic function of MCM2 leads to replication fork stalling, DNA double-strand breaks, and accumulation of genomic instability, a primary hallmark of aging. Additionally, MCM2's histone-binding activity is critical for parental histone recycling during replication, helping to maintain epigenetic information — disruption of which accelerates aging phenotypes. Adequate MCM2 function therefore suppresses genomic instability and preserves epigenetic integrity, both of which are pro-longevity effects.
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 Mcm2 in Mus musculus with high confidence (0.72). The mechanistic reasoning is excellent and well-grounded: it correctly identifies MCM2's role in DNA replication licensing via the MCM2-7 helicase complex, explains how loss of function leads to genomic instability (a hallmark of aging), and notably includes the histone-binding/parental histone recycling function which is a more nuanced and accurate mechanistic point relevant to epigenetic maintenance during aging. The reasoning about replication fork protection and genomic stability suppression as pro-longevity mechanisms is sound and consistent with published literature on MCM2 hypomorphic mouse models showing accelerated aging phenotypes.
Raw API responses
solver
{
"reasoning": "MCM2 is a core subunit of the MCM2-7 replicative helicase complex, which is essential for DNA replication licensing — the process that ensures each origin of replication fires exactly once per cell cycle. Its 3'-5' DNA helicase and ATPase activities are required for unwinding duplex DNA at replication forks, preventing under-replication and replication stress. Loss or hypomorphic function of MCM2 leads to replication fork stalling, DNA double-strand breaks, and accumulation of genomic instability, a primary hallmark of aging. Additionally, MCM2's histone-binding activity is critical for parental histone recycling during replication, helping to maintain epigenetic information — disruption of which accelerates aging phenotypes. Adequate MCM2 function therefore suppresses genomic instability and preserves epigenetic integrity, both of which are pro-longevity effects.",
"confidence": 0.72,
"key_pathways": [
"DNA replication licensing (MCM2-7 helicase complex)",
"Replication fork protection and genomic stability",
"Parental histone recycling and epigenetic maintenance"
],
"mechanism_class": "genomic_instability",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The model correctly predicted pro_longevity for Mcm2 in Mus musculus with high confidence (0.72). The mechanistic reasoning is excellent and well-grounded: it correctly identifies MCM2's role in DNA replication licensing via the MCM2-7 helicase complex, explains how loss of function leads to genomic instability (a hallmark of aging), and notably includes the histone-binding/parental histone recycling function which is a more nuanced and accurate mechanistic point relevant to epigenetic maintenance during aging. The reasoning about replication fork protection and genomic stability suppression as pro-longevity mechanisms is sound and consistent with published literature on MCM2 hypomorphic mouse models showing accelerated aging phenotypes.",
"failure_mode": "correct",
"answer_correct": true,
"mechanism_correct": true,
"reasoning_quality": 5,
"ground_truth_questionable": false
}