Lmna
M. musculus
lamin A
What the model saw
Gene: Lmna Organism: Mus musculus Known functions: lamin A. prelamin-A/C. identical protein binding. protein binding. protein phosphatase 1 binding. structural constituent of cytoskeleton. structural constituent of nuclear lamina.
View unredacted entry
lamin A. prelamin-A/C. identical protein binding. protein binding. protein phosphatase 1 binding. structural constituent of cytoskeleton. structural constituent of nuclear lamina.
Solver output
Lmna encodes Lamin A/C, a key structural component of the nuclear lamina that maintains nuclear envelope integrity, chromatin organization, and DNA damage response. Loss-of-function mutations in Lmna (e.g., Lmna knockout mice) cause severe premature aging phenotypes, while the accumulation of a truncated, farnesylated form of prelamin-A (progerin, as in Hutchinson-Gilford Progeria Syndrome) drives accelerated aging by disrupting nuclear architecture, leading to genomic instability, heterochromatin loss, and impaired DNA repair. The normal, properly processed Lamin A/C is therefore essential for nuclear structural integrity and genome maintenance, placing it firmly in the pro-longevity category. Its interaction with protein phosphatase 1 and its role as a structural constituent of the nuclear lamina further support its function in maintaining chromatin stability and regulating cell cycle checkpoints. Thus, the wild-type function of Lmna opposes aging by preserving nuclear architecture and genomic stability.
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 ground truth is "unclear" for Lmna in mice, but the model confidently predicted "pro_longevity" with 0.92 confidence. The mechanistic reasoning is scientifically sound — Lmna knockout mice do show premature aging, and progerin accumulation drives accelerated aging — but the model failed to recognize the complexity and ambiguity of the evidence. The gene's influence on longevity is classified as "unclear" in GenAge, likely because different mutations (knockout vs. progerin-producing) have different effects, and the wild-type function doesn't cleanly map to a simple pro- or anti-longevity classification. The model oversimplified by concluding that wild-type Lmna is "pro-longevity" without acknowledging the nuance that makes this classification unclear. High confidence in a wrong answer is a significant failure.
Raw API responses
solver
{
"reasoning": "Lmna encodes Lamin A/C, a key structural component of the nuclear lamina that maintains nuclear envelope integrity, chromatin organization, and DNA damage response. Loss-of-function mutations in Lmna (e.g., Lmna knockout mice) cause severe premature aging phenotypes, while the accumulation of a truncated, farnesylated form of prelamin-A (progerin, as in Hutchinson-Gilford Progeria Syndrome) drives accelerated aging by disrupting nuclear architecture, leading to genomic instability, heterochromatin loss, and impaired DNA repair. The normal, properly processed Lamin A/C is therefore essential for nuclear structural integrity and genome maintenance, placing it firmly in the pro-longevity category. Its interaction with protein phosphatase 1 and its role as a structural constituent of the nuclear lamina further support its function in maintaining chromatin stability and regulating cell cycle checkpoints. Thus, the wild-type function of Lmna opposes aging by preserving nuclear architecture and genomic stability.",
"confidence": 0.92,
"key_pathways": [
"nuclear lamina integrity and chromatin organization",
"DNA damage response and repair",
"prelamin-A processing (ZMPSTE24/farnesylation pathway)"
],
"mechanism_class": "genomic_instability",
"longevity_influence": "pro_longevity"
}advisor
{
"notes": "The ground truth is \"unclear\" for Lmna in mice, but the model confidently predicted \"pro_longevity\" with 0.92 confidence. The mechanistic reasoning is scientifically sound — Lmna knockout mice do show premature aging, and progerin accumulation drives accelerated aging — but the model failed to recognize the complexity and ambiguity of the evidence. The gene's influence on longevity is classified as \"unclear\" in GenAge, likely because different mutations (knockout vs. progerin-producing) have different effects, and the wild-type function doesn't cleanly map to a simple pro- or anti-longevity classification. The model oversimplified by concluding that wild-type Lmna is \"pro-longevity\" without acknowledging the nuance that makes this classification unclear. High confidence in a wrong answer is a significant failure.",
"failure_mode": "confident_wrong",
"answer_correct": false,
"mechanism_correct": true,
"reasoning_quality": 3,
"ground_truth_questionable": true
}