PTPN22 rs3087714: Understanding Genetic Associations
The rs3087714 variant is a single-nucleotide polymorphism located within the PTPN22 gene region. Research has investigated this variant for potential associations with altered risks for various autoimmune conditions, including type 1 diabetes and rheumatoid arthritis.
What each genotype means
Typical autoimmune risk
You carry two copies of the C allele for rs3087714 in the PTPN22 region. Research associates this genotype with baseline, non-elevated susceptibility to autoimmune conditions such as rheumatoid arthritis and type 1 diabetes relative to this marker. This finding does not rule out developing autoimmune disorders, as disease risk involves numerous environmental and genetic components.
Found in approximately 60% to 75% of individuals of European ancestry and is the predominant genotype across most global populations.
Modestly altered autoimmune risk
You carry one copy of the T risk allele and one copy of the C allele at rs3087714. In published genetic studies, carrying a single T allele is linked to a moderately altered statistical risk for autoimmune diseases including type 1 diabetes and rheumatoid arthritis. This is an associative population finding and is not a clinical diagnosis or guarantee of disease onset.
Carried by roughly 25% to 35% of people of European ancestry, but occurs at much lower frequencies in East Asian and African ancestries.
Increased autoimmune risk
You carry two copies of the T risk allele for rs3087714 in the PTPN22 gene region. Studies show this homozygous genotype confers a greater statistical relative risk for autoimmune disorders such as type 1 diabetes and rheumatoid arthritis compared to carrying one or no copies of the variant. However, this is only a statistical contributor among many non-genetic and polygenic factors, not a definitive diagnosis.
Observed in roughly 2% to 6% of individuals of European descent and is rare in most Asian populations.
What is rs3087714?
The rs3087714 variant is a specific genetic marker, or single-nucleotide polymorphism (SNP), situated within the PTPN22 gene region. In genomics, a SNP represents a variation at a single position in the DNA sequence among individuals. Scientists study these markers to understand how subtle differences in our genetic code might influence biological processes or susceptibility to complex diseases. The rs3087714 variant is one of several markers identified within the PTPN22 gene, which has been a major focus of autoimmune research for decades. Because this variant is located in a gene known for its critical role in immune system regulation, researchers have sought to determine if it contributes to the development of immune-mediated conditions. It is important to note that identifying a SNP is only the first step in understanding its biological impact; researchers must then conduct large-scale studies to confirm whether the variant has a functional effect on the body or if it is simply a marker inherited alongside other, more influential genetic changes.
The Role of the PTPN22 Gene
The PTPN22 gene encodes a protein known as lymphoid-specific tyrosine phosphatase, or LYP. This protein acts as a key regulator within the immune system, specifically functioning as a 'brake' on T-cell activation. T-cells are essential white blood cells that help the body fight infections, but they must be carefully controlled to prevent them from attacking the body's own healthy tissues. By modulating the signaling pathways that trigger T-cell responses, the PTPN22 protein helps maintain immune tolerance. When the function of this protein is altered, it may lead to an overactive immune response, which is a hallmark of many autoimmune diseases. Because of its central role in immune homeostasis, variations in the PTPN22 gene are frequently studied in the context of conditions like type 1 diabetes, rheumatoid arthritis, and systemic lupus erythematosus. Understanding how specific variants like rs3087714 might influence the expression or function of the LYP protein remains an active area of investigation in immunology and genetics.
Research and Evidence Strength
The evidence linking rs3087714 to autoimmune conditions is currently considered limited. While the PTPN22 gene as a whole is widely recognized as a significant contributor to autoimmune susceptibility—most notably through the well-studied rs2476601 variant—the specific impact of rs3087714 is less clear. Scientific literature often highlights that genetic associations can be complex, with some variants showing strong effects in specific populations while appearing neutral or absent in others. Because autoimmune diseases are multifactorial, they are influenced by a combination of many genetic factors, environmental triggers, and lifestyle elements. Consequently, a single SNP like rs3087714 rarely acts as a definitive cause of disease. Current research continues to evaluate whether this variant independently contributes to disease risk or if it serves as a proxy for other nearby genetic variations. Consumers should view these findings as statistical observations from population studies rather than diagnostic indicators, as the clinical significance of this specific variant is not yet fully established.
Population Frequency
The frequency of the rs3087714 variant varies significantly across different ancestral groups. In European populations, the minor allele frequency is typically observed in the range of approximately 0.15 to 0.25. These frequencies are derived from large-scale genomic databases that aggregate data from diverse cohorts. It is important to recognize that allele frequencies are not uniform globally; genetic drift and historical migration patterns mean that a variant common in one population may be rare or entirely absent in another. These differences are a standard feature of human genetic diversity and are essential for researchers to consider when interpreting the results of association studies. Because the prevalence of autoimmune conditions also varies by geography and ancestry, scientists must account for these population-specific frequencies to avoid drawing inaccurate conclusions about the role of any single genetic variant in disease development.
Interpreting Your Genetic Information
Genetic information regarding variants like rs3087714 is intended for educational purposes and should not be used to diagnose or predict the development of any medical condition. Because the evidence for this variant is limited, it does not provide a clear clinical picture of an individual's health risk. Autoimmune diseases are complex, and their development is influenced by a wide array of factors beyond a single SNP. If you have concerns about your health, family history of autoimmune disease, or specific symptoms, the most appropriate course of action is to consult with a qualified healthcare professional. They can provide context based on your personal medical history, physical examinations, and validated clinical tests. Avoid making health decisions based solely on genetic reports, as these tools cannot account for the full complexity of your biological and environmental profile. Always prioritize guidance from your doctor or a genetic counselor when navigating questions about your genetic health.
How common is this variant?
The minor allele frequency for rs3087714 is approximately 0.15–0.25 in European populations, though frequencies vary across different global ancestries.
Frequently asked questions
Does having the rs3087714 variant mean I will get an autoimmune disease?
No. Genetic variants like rs3087714 are only one of many factors that contribute to the risk of developing an autoimmune condition. Most people with this variant will never develop an autoimmune disease, as environmental and other genetic factors play a much larger role.
Is rs3087714 the same as the PTPN22 R620W variant?
No. The R620W variant is a well-known SNP identified as rs2476601. While both are located in the PTPN22 gene, they are distinct genetic markers with different levels of research evidence supporting their associations with disease.
Can I use this information to change my medication?
No. You should never change or stop any medication based on genetic test results. Always discuss your medications and any concerns about your health with your clinician or pharmacist.
Where can I find more information about PTPN22?
You can find reliable information about the PTPN22 gene and its function through resources like MedlinePlus Genetics or the NCBI Gene database. These sites provide summaries of gene function and their known roles in human health.
Sources & further reading
Educational information only, last refreshed 10/12/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs3087714?
Upload a raw DNA file from 23andMe, AncestryDNA, MyHeritage, or FamilyTreeDNA and see this variant — plus thousands more — interpreted in your full report.
Get my report — $29Related variants in PTPN22
This variant in PTPN22 is associated with autoimmune-related phenotypes in patients with chronic spontaneous urticaria.
Located in the promoter region of PTPN22, this variant has been robustly associated via genome-wide association studies with altered risk for autoimmune disorders such as type 1 diabetes and rheumatoid arthritis.
Potent autoantigen-signaling variant R620W strongly associated with susceptibility to rheumatoid arthritis, type 1 diabetes, and systemic lupus erythematosus.
This variant is a major risk factor for several autoimmune diseases, including type 1 diabetes and rheumatoid arthritis.
The C/C genotype at this locus is linked to the downregulation of PTPN22 mRNA expression and increased rheumatoid arthritis risk.