TYR rs1126809: Understanding Your Genetic Pigmentation Variant
The rs1126809 variant is a common genetic change located within the TYR gene, which plays a critical role in human pigmentation. Research associates this specific variant with variations in skin, hair, and eye color, as well as differences in sun sensitivity and skin cancer risk.
What each genotype means
Typical tyrosinase activity
This genotype represents the most common form of the TYR gene variant. Research indicates this version is associated with standard tyrosinase enzyme function, which plays a key role in melanin production and pigmentation. It is considered the baseline against which other variations are measured in studies of skin, hair, and eye color.
This is the most prevalent genotype across most global populations.
Intermediate pigmentation influence
Carrying one copy of this variant may result in subtle differences in tyrosinase activity compared to the baseline. Studies have linked this variant to variations in skin, hair, and eye pigmentation, as well as potential differences in susceptibility to certain skin conditions. Because this is a complex trait, individual outcomes are influenced by many other genetic and environmental factors.
This heterozygous genotype is found at varying frequencies depending on ancestral background, appearing in a significant portion of many populations.
Altered tyrosinase activity
This genotype is associated with reduced tyrosinase enzyme activity, which can influence melanin synthesis and pigmentation patterns. Research has linked this specific variant to associations with skin, hair, and eye color, as well as potential susceptibility to certain skin-related conditions like actinic keratosis or melanoma. Please discuss any concerns regarding skin health or sun sensitivity with a dermatologist.
This genotype is less common than the G/G or A/G combinations and its frequency varies significantly across different ancestral groups.
What is rs1126809?
The variant rs1126809 is a single nucleotide polymorphism (SNP) located on chromosome 11 within the TYR gene. In genetics, a SNP represents a variation at a single position in the DNA sequence. This specific variant is classified as a missense mutation, meaning the change in the DNA code results in a different amino acid being incorporated into the resulting protein. Because the TYR gene provides the blueprint for the tyrosinase enzyme, alterations in this sequence can potentially change how that enzyme functions. Scientists study this variant to understand how subtle differences in our genetic code contribute to the wide spectrum of human physical traits, particularly those related to how our bodies produce and distribute melanin, the pigment responsible for the color of our skin, hair, and eyes.
The Role of the TYR Gene
The TYR gene is essential for the production of melanin, the primary pigment in humans. It encodes the enzyme tyrosinase, which acts as the rate-limiting step in the biosynthesis of melanin. This enzyme catalyzes the oxidation of L-DOPA, a precursor molecule, into the pigments that give color to our tissues. When the TYR gene functions normally, it ensures the consistent production of melanin, which protects skin cells from ultraviolet (UV) radiation. Because tyrosinase is so central to the pigmentation process, variations in the TYR gene are frequently studied in the context of both normal human variation—such as why people have different eye or hair colors—and clinical conditions, including various forms of oculocutaneous albinism, where melanin production is significantly reduced or absent.
Research and Associations
Scientific research has linked rs1126809 to several traits related to pigmentation and sun exposure. Studies have observed associations between this variant and variations in eye color, skin pigmentation, and tanning ability. Furthermore, some research has investigated its potential role in skin cancer susceptibility, including cutaneous malignant melanoma and basal cell carcinoma. It is important to note that the evidence for these associations is considered moderate. The functional impact of this variant may not be uniform across all individuals; recent studies suggest that the effect of the rs1126809 allele may depend on the broader genetic context, or 'haplotype,' of the surrounding DNA. This means that the same variant might have different biological consequences depending on other nearby genetic markers, highlighting the complexity of how our genes influence our physical traits and health risks.
What You Can Do With This Information
Understanding your genotype for rs1126809 provides insight into your genetic predisposition for certain pigmentation-related traits, but it is not a diagnostic tool. Because this variant is associated with sun sensitivity and skin cancer risk, it serves as a reminder of the importance of general skin health practices, such as using sunscreen, wearing protective clothing, and monitoring for changes in moles or skin spots. You cannot use this information to predict your health outcomes with certainty, as environmental factors and other genes also play significant roles. If you have concerns about your skin health or personal risk factors for skin cancer, the most appropriate step is to consult with a dermatologist. They can provide personalized medical advice based on your clinical history and physical examination, which are far more informative than any single genetic variant.
How common is this variant?
The rs1126809 variant shows significant variation across global populations, being highly enriched in South Asian groups while being relatively depleted in European populations.
Frequently asked questions
Does rs1126809 mean I will get skin cancer?
No. While some studies have found a statistical association between this variant and an increased risk of certain skin cancers, it is only one of many factors. Genetics, sun exposure history, and other lifestyle choices all contribute to your overall risk.
Can I change my TYR gene expression?
You cannot change your underlying DNA sequence. However, you can manage your skin health by practicing sun safety, which helps protect your skin regardless of your genetic predisposition.
Is this variant related to albinism?
The TYR gene is known to be involved in certain types of oculocutaneous albinism. However, rs1126809 is a common variant associated with normal human pigmentation variation rather than the severe loss of pigment seen in clinical albinism.
Should I get tested for this SNP?
Genetic testing for common pigmentation variants is generally not recommended for clinical decision-making. If you are concerned about your skin health, a physical exam by a dermatologist is the most effective way to assess your needs.
Sources & further reading
Educational information only, last refreshed 10/6/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This variant in the tyrosinase gene is associated with oculocutaneous albinism type 1.
This variant (S192Y) in the TYR gene is associated with variations in skin, hair, and eye pigmentation and is a known risk allele for melanoma.
Common missense variant (R402Q) associated with variation in skin, eye, and hair pigmentation in human populations.
Intronic single-nucleotide variant in the tyrosinase gene associated with variation in human eye color and cutaneous tanning response.
This variant is associated with oculocutaneous albinism type 1B and shows a notable frequency in the admixed American population.
Tyrosinase regulatory variant associated with natural skin pigmentation and freckling.