OCA2 rs1800416: What Your Genotype Means
The rs1800416 variant is a genetic change located within the OCA2 gene, which plays a key role in human pigmentation. It is statistically associated with variations in skin and eye color across different ancestral populations.
What each genotype means
Typical baseline pigmentation
You carry two copies of the common ancestral C allele for this OCA2 variant. This genotype is associated with standard melanin synthesis and typical baseline pigmentation, often correlating with darker eye, hair, or skin tones compared to carriers of the A allele. However, visible pigmentation traits are polygenic and heavily influenced by primary determinants such as HERC2 rs12913832.
Carried by approximately 75% to 85% of individuals of European descent and is nearly fixed in African and Asian populations.
Intermediate lighter pigment tendency
You carry one copy of the derived A allele and one copy of the ancestral C allele. Published research suggests the A allele (associated with the Arg419Gln amino acid change) contributes modestly to lighter pigmentation phenotypes, such as lighter eye or skin tones. Because evidence for rs1800416 remains limited and human pigmentation is governed by multiple interconnected genes, this variant alone does not determine physical appearance.
Carried by roughly 15% to 20% of people of European ancestry, but rare or absent in sub-Saharan African populations.
Increased likelihood of lighter pigmentation
You carry two copies of the derived A allele at this locus. Research associates this genotype with reduced OCA2-mediated melanin activity, modestly increasing the likelihood of lighter eye, skin, or hair pigmentation in admixed and European cohorts. This effect represents a statistical association rather than a certainty, as dominant regulatory variants across the OCA2-HERC2 locus exert stronger control over overall pigment traits.
Found in approximately 1% to 2% of individuals of European ancestry and exceptionally rare in non-European populations.
Understanding the rs1800416 Variant
The rs1800416 variant is a specific single nucleotide polymorphism (SNP) located within the OCA2 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This particular variant is categorized as a non-synonymous change, meaning it results in an amino acid substitution—specifically, the replacement of arginine with glutamine at position 419 (Arg419Gln). Because this change occurs in the coding region of the gene, it has the potential to alter the structure or function of the protein produced by the OCA2 gene. Researchers study such variants to understand how subtle differences in our genetic code contribute to the wide spectrum of human physical traits, such as the diversity in skin, hair, and eye pigmentation observed globally.
The Role of the OCA2 Gene
The OCA2 gene provides instructions for making a protein called the P protein, which is located in melanocytes. These specialized cells produce melanin, the pigment that gives color to our skin, hair, and eyes. The P protein is essential for the normal function of melanosomes, the structures within cells where melanin is synthesized and stored. By regulating the pH and transport of molecules within these organelles, the P protein ensures that melanin production proceeds efficiently. When the OCA2 gene is altered, it can disrupt this process, leading to reduced melanin production. While severe mutations in this gene are known to cause Oculocutaneous Albinism type 2, common variants like rs1800416 are associated with the normal, healthy range of pigmentation variation rather than clinical albinism.
Research and Evidence Strength
Scientific research has linked rs1800416 to human pigmentation traits, including variations in eye and skin color. Studies suggest that this variant may act as a hypomorphic allele, potentially leading to reduced protein function, which in turn influences the intensity of pigmentation. However, the evidence strength for this specific variant is considered limited. While it is frequently studied alongside other well-known pigmentation markers in the OCA2-HERC2 region, its individual effect size is often modest and can vary significantly depending on the genetic background of the population being studied. Some research has explored its potential association with skin cancer risk in specific cohorts, but these findings are not universal. As with many complex traits, pigmentation is polygenic, meaning it is influenced by the combined effects of many different genes and environmental factors.
Population Frequency
The frequency of the rs1800416 variant shows distinct geographic patterns, reflecting the history of human migration and adaptation. It is most commonly observed in European populations, where the minor allele frequency typically ranges between 0.08 and 0.12. In contrast, this variant is largely absent or found at very low frequencies in sub-Saharan African populations. These differences highlight how certain genetic markers have become more prevalent in specific regions over time. Understanding these population-specific frequencies is crucial for researchers, as it helps them account for ancestral diversity when conducting genetic association studies. It also serves as a reminder that the genetic architecture of traits like pigmentation is deeply tied to the evolutionary history of human populations across the globe.
Interpreting Your Genetic Information
It is important to understand that genetic variants like rs1800416 provide only a small piece of the puzzle regarding your physical traits. While this SNP is associated with pigmentation, it does not act in isolation; your overall appearance is the result of a complex interplay between your entire genetic makeup and environmental influences. You cannot use this information to diagnose any medical condition or predict specific health outcomes. If you have questions about your genetic results or concerns about skin health, such as changes in moles or sun sensitivity, the best course of action is to consult with a qualified healthcare professional or a dermatologist. They can provide personalized guidance based on your clinical history rather than relying on individual genetic markers alone.
How common is this variant?
The rs1800416 variant is common in European populations with a minor allele frequency of approximately 0.08–0.12, while it is rare or absent in sub-Saharan African populations.
Frequently asked questions
Does rs1800416 cause albinism?
No, rs1800416 is a common variant associated with normal variation in human pigmentation. It is not a mutation that causes Oculocutaneous Albinism type 2.
Can I use this SNP to predict my eye color?
While this SNP is associated with pigmentation, it is only one of many genetic factors that influence eye color. It cannot be used to accurately predict eye color on its own.
Is this variant linked to skin cancer risk?
Some studies have explored potential links between OCA2 variants and skin cancer risk in specific populations. However, these associations are complex and not definitive for any individual.
Why is this variant common in Europe but not Africa?
The frequency of this variant reflects human evolutionary history and adaptation to different environments. Genetic markers often show geographic patterns due to historical migration and natural selection.
Sources & further reading
Educational information only, last refreshed 10/13/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs1800416?
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 OCA2
This missense variant (p.Ala486Thr) in the OCA2 gene is associated with human pigmentation traits, including eye and skin color variation.
This variant is located within the OCA2 gene, which encodes the P protein essential for melanin production and is a key locus for human pigmentation variation.
Missense variant Arg419Gln strongly linked to intermediate eye color, blue/green iris phenotypes, and lighter pigmentation.
Pigmentation-modifying SNP modulating blue versus brown eye color penetrance and melanin deposition.
Common missense variation (Arg305Trp) in OCA2 associated with eye color gradation and lighter skin pigmentation in European populations.
Coding variant (His615Arg) in OCA2 associated with lighter skin and iris pigmentation specifically across East Asian populations.