MC1R rs2228479: Understanding the Val92Met Variant
The rs2228479 variant, commonly known as Val92Met, is a genetic change in the MC1R gene that influences how skin cells respond to ultraviolet (UV) radiation. It is frequently studied for its associations with skin pigmentation, freckling, and an increased risk of skin cancer.
What each genotype means
Typical MC1R function
This genotype represents the most common form of the MC1R gene, often referred to as the wild-type. Individuals with this profile typically have standard pigmentary responses to UV radiation compared to those carrying variant alleles.
This is the most common genotype globally, though frequencies vary significantly by ancestry.
Increased UV sensitivity risk
Carrying one copy of the A allele (Val92Met) is associated with a tendency toward increased UV sensitivity and potential changes in freckling patterns. Research suggests this variant may contribute to melanoma risk independently of physical traits like hair or skin color.
This heterozygous genotype is found in a notable portion of populations of European ancestry, though it is also observed in other global populations.
Elevated UV sensitivity risk
Carrying two copies of the A allele (Val92Met) may further influence the skin's response to sunlight and is linked to an increased risk of melanoma and photo-aging. Because this variant affects how the body produces protective pigments, individuals with this profile should prioritize sun protection and discuss skin health monitoring with a dermatologist.
This homozygous genotype is less common than the heterozygous form in most populations of European ancestry.
What is the rs2228479 Variant?
The rs2228479 variant is a single nucleotide polymorphism (SNP) located within the MC1R gene. In genetic literature, this specific change is often referred to as Val92Met, indicating that the amino acid valine at position 92 has been replaced by methionine. This variant is one of many polymorphisms found in the MC1R gene, which is highly variable across human populations. Because this change occurs in the coding region of the gene, it can alter the structure or function of the resulting protein. Researchers categorize rs2228479 as an 'r' allele, a designation often used for variants that have a relatively weaker association with the classic red hair color phenotype compared to 'R' alleles, which are more strongly linked to red hair, fair skin, and high sun sensitivity.
The Role of the MC1R Gene
The MC1R gene provides instructions for making the melanocortin 1 receptor protein. This receptor is primarily found on the surface of melanocytes, the cells responsible for producing melanin, the pigment that gives skin, hair, and eyes their color. When activated, the MC1R receptor triggers a signaling pathway that promotes the production of eumelanin, a dark pigment that helps protect the skin from the damaging effects of UV radiation. When the MC1R gene carries certain variants, the receptor may not function as efficiently. This can lead to a shift in the type of melanin produced, favoring pheomelanin—a lighter, reddish-yellow pigment that provides less protection against UV-induced DNA damage. Beyond pigmentation, emerging research suggests that MC1R may also play a role in DNA repair and cell survival processes within melanocytes.
Research and Health Associations
Scientific studies have consistently associated MC1R variants, including rs2228479, with an increased risk of skin cancers, such as basal cell carcinoma and squamous cell carcinoma. Research indicates that individuals carrying these variants may have a reduced ability to repair UV-induced DNA damage or may experience higher levels of oxidative stress in their skin cells. While some variants are strongly tied to red hair and fair skin, rs2228479 is often considered to have a more moderate or subtle effect on these physical traits. Importantly, some evidence suggests that the increased risk of melanoma and other skin cancers associated with MC1R variants may exist independently of a person's visible skin type or hair color. This means that even individuals without the classic 'red hair' phenotype may still experience altered skin cell responses to sun exposure if they carry these genetic variants.
What You Can and Cannot Do
Understanding your genetic status for rs2228479 does not provide a medical diagnosis or a definitive prediction of your health future. Genetic variants are only one piece of a complex puzzle that includes environmental factors, sun exposure history, and other genetic influences. If you are interested in your genetic profile, you should discuss the results with a healthcare professional or a genetic counselor who can help interpret the information in the context of your overall health. Regardless of your genotype, standard dermatological advice remains the most effective way to manage skin health: use broad-spectrum sunscreen, wear protective clothing, and schedule regular skin checks with a dermatologist. Never use genetic information to make decisions about medication or to alter medical treatments without consulting your clinician or pharmacist, as they are the only ones qualified to provide personalized medical guidance.
How common is this variant?
The MC1R gene is highly polymorphic, particularly in populations of European ancestry. Specific frequency data for rs2228479 varies by region and ethnic background, but it is generally recognized as a common variant in these populations.
Frequently asked questions
Does having the rs2228479 variant mean I will get skin cancer?
No. Having this variant is associated with a statistical increase in risk, but it does not guarantee that you will develop skin cancer. Many factors, including sun exposure and other genetic markers, contribute to your overall risk.
Can I change my MC1R genotype?
No, your genotype is determined at conception and cannot be changed. However, you can manage your skin health through protective behaviors like using sunscreen and avoiding excessive UV exposure.
Is rs2228479 the same as the 'red hair gene'?
The MC1R gene is often called the 'red hair gene' because many of its variants are linked to red hair. rs2228479 is one of many variants in this gene, though it is often classified as having a weaker link to the red hair phenotype than others.
Should I get tested for this variant?
Genetic testing for this variant is not typically required for routine medical care. If you are concerned about your skin cancer risk, it is best to speak with a dermatologist about your personal and family history.
Sources & further reading
Educational information only, last refreshed 10/4/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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The p.Arg163Gln variant in MC1R is associated with red hair, fair skin, and increased melanoma risk.
This missense variant (p.Arg142His) is a well-established, highly penetrant allele associated with red hair color and fair skin pigmentation.
This missense variant (p.Arg160Trp) is a primary genetic determinant of red hair color, pale skin, and increased freckling in European populations.
The Val60Leu missense variant in MC1R is a well-documented factor contributing to the red hair, fair skin, and freckling phenotype.
A rare variant associated with lighter skin pigmentation in specific populations.
Asp294His coding substitution in the MC1R gene associated with red hair, skin sun-sensitivity, and melanoma risk.