TULP3 rs539453325: Understanding This Genetic Variant
The rs539453325 variant is a single nucleotide polymorphism located within the TULP3 gene. It has been identified in genome-wide association studies as being linked to traits related to a family history of Alzheimer's disease.
What each genotype means
Typical TULP3 genotype
This is the most common genotype for this variant in the general population. Research indicates this variant is located in an intronic region of the TULP3 gene, which has been associated with a family history of Alzheimer's disease in some genome-wide association studies. This association is based on limited evidence and does not constitute a medical diagnosis or a prediction of individual health outcomes.
This is the major allele genotype and is found in the vast majority of individuals across global populations.
Variant carrier status
You carry one copy of the T allele at this position. This variant has been identified in studies exploring genetic associations with a family history of Alzheimer's disease, though the evidence remains limited and the functional impact of this intronic change is not fully understood. Please consult with a healthcare professional if you have concerns regarding your family health history.
This genotype is relatively rare, with the minor T allele occurring at a frequency of approximately 0.0027 in studied populations.
Rare variant genotype
You carry two copies of the T allele at this position. While this variant has been noted in research regarding TULP3 and family history of Alzheimer's disease, the clinical significance of this specific genotype is currently unknown and evidence is limited. This finding should not be used to infer personal disease risk or to guide medical decision-making.
This genotype is extremely rare in the general population, occurring at a very low frequency consistent with the minor allele frequency of the T variant.
What is rs539453325?
The variant rs539453325 is a specific genetic change, or single nucleotide polymorphism (SNP), located on chromosome 12 at position 12:2920414. In the context of the human genome, it is classified as an intronic variant, meaning it resides within a non-coding region of the TULP3 gene. Intronic variants do not directly alter the protein sequence produced by a gene, but they may influence how the gene is regulated or expressed within different tissues. This variant is cataloged in major genomic databases, including the GWAS Catalog and dbSNP, which track genetic variations across human populations. Because it is located in a non-coding region, its functional impact on the body is not immediately obvious and remains a subject of ongoing scientific investigation.
The Role of the TULP3 Gene
The TULP3 gene encodes the Tubby-like protein 3, which serves as a critical adaptor protein for ciliary trafficking. Primary cilia are hair-like structures on the surface of cells that act as sensory organelles, helping cells communicate with their environment. TULP3 is essential for regulating the cargo that enters these cilia, thereby influencing signaling pathways that are vital for development and tissue maintenance. Research has shown that severe, bi-allelic mutations in TULP3 can lead to ciliopathies, which are complex disorders characterized by multi-organ issues such as liver fibrosis, fibrocystic kidney disease, and cardiomyopathy. While these severe conditions are linked to rare, damaging mutations, the role of common intronic variants like rs539453325 in modulating TULP3 expression or contributing to complex traits is a distinct area of study.
Research Associations and Evidence
The evidence linking rs539453325 to human traits is currently classified as limited. It has appeared in the GWAS Catalog in association with a family history of Alzheimer's disease. It is important to note that a statistical association in a genome-wide association study does not imply a direct cause-and-effect relationship. These studies identify correlations between specific genetic markers and traits across large groups of people, but they do not prove that the variant itself causes the condition. The biological mechanism by which this intronic variant might influence Alzheimer's risk is not yet understood. Because the evidence is limited, these findings should be viewed as preliminary observations that require further replication and functional validation in larger, more diverse cohorts before any clinical significance can be determined.
What You Can Do With This Information
Genetic information regarding variants like rs539453325 is primarily intended for educational and research purposes. Because the association with Alzheimer's disease is based on limited evidence, this variant cannot be used to predict individual health outcomes or diagnose any medical condition. You should not make any changes to your lifestyle, diet, or medical care based on this information. If you have concerns about your family history of Alzheimer's disease or other health conditions, the most appropriate step is to consult with a qualified healthcare professional or a genetic counselor. They can provide context based on your complete medical history and clinical presentation, which are far more informative than any single genetic variant. Always prioritize professional medical advice over information found in genetic databases.
How common is this variant?
The minor allele frequency (MAF) for the T allele of rs539453325 is approximately 0.0027, making it a relatively rare variant in the populations studied.
Frequently asked questions
Does having the T allele mean I will develop Alzheimer's disease?
No. This variant is only associated with a family history of the condition in statistical studies. It is not a diagnostic marker, and having the T allele does not mean you will develop the disease.
Is rs539453325 a known cause of ciliopathy?
No. Ciliopathies are typically caused by rare, severe, bi-allelic mutations that disrupt TULP3 protein function. This intronic variant is not considered a cause of these severe genetic disorders.
Where can I find more information about my genetic risk?
If you are concerned about your risk for Alzheimer's disease, you should speak with a doctor or a genetic counselor. They can evaluate your personal and family health history to provide accurate guidance.
Why is the evidence for this variant called limited?
Evidence is labeled as limited when the statistical association is weak, has not been widely replicated, or when the biological mechanism remains unknown. It indicates that the finding is preliminary.
Sources & further reading
Educational information only, last refreshed 10/12/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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