ASIP rs17305573: Understanding Your Genetic Pigmentation Variant
The rs17305573 variant is a non-coding genetic polymorphism located within the ASIP gene. It is primarily studied for its role in modulating human skin tone and pigmentation traits.
What each genotype means
Typical pigmentation profile
This genotype is associated with standard regulation of the ASIP gene, which plays a central role in determining human pigmentation. Research indicates that individuals with this genotype do not carry the specific regulatory change linked to lighter skin tone or altered sun sensitivity.
This is the most common genotype observed in European populations.
Modulated pigmentation tendency
As a carrier of one copy of the T allele, your genotype is associated with a functional change in ASIP expression that can influence skin tone and pigmentary traits. Statistical observations suggest this variant can contribute to variations in skin color and tanning response, which are recognized factors in skin health.
Carried by a significant proportion of people of European ancestry, occurring in roughly 1 in 3 to 1 in 2 individuals depending on the specific sub-population.
Enhanced pigmentation modulation
This genotype is associated with two copies of the T allele, which influences ASIP regulation more significantly than the presence of a single copy. In population studies, this profile is statistically associated with lighter skin pigmentation and, in some contexts, increased sun sensitivity or related dermatological considerations.
This genotype is less common than the heterozygous state, typically observed in roughly 1 in 15 to 1 in 20 individuals of European ancestry.
What is rs17305573?
The rs17305573 variant is a single nucleotide polymorphism (SNP) situated in the ASIP gene region on chromosome 20. Unlike variants that change the structure of a protein, this SNP is located in a non-coding region, meaning it does not alter the amino acid sequence of the resulting protein. Instead, research suggests that such variants often influence gene expression—the process by which the instructions in our DNA are converted into functional products. By sitting in a regulatory area, rs17305573 may affect how much agouti signaling protein is produced or when it is expressed in specific tissues. Scientists identify these markers to better understand the complex genetic architecture that contributes to the wide spectrum of human physical appearance, particularly regarding how our bodies manage pigment production.
The Role of the ASIP Gene
The ASIP gene encodes the agouti signaling protein, a key regulator of mammalian pigmentation. In many species, this protein acts as an antagonist to the melanocortin 1 receptor (MC1R). By competing with other molecules for binding to MC1R, the agouti signaling protein effectively switches the type of melanin produced by pigment cells, shifting the balance from dark eumelanin to lighter pheomelanin. While human pigmentation is governed by a complex network of many genes, ASIP remains a central player in this biological pathway. Understanding how ASIP functions helps researchers explain the diversity in human skin, hair, and eye color. Because it influences the fundamental chemistry of melanogenesis, variations in or near this gene are frequently investigated in studies concerning skin sensitivity to sunlight and other pigmentation-related phenotypes.
Research and Associations
Genetic research, including genome-wide association studies (GWAS), has linked the ASIP locus to various pigmentation traits. Evidence for the role of ASIP in human appearance is considered moderate, as it is one of many genes that collectively determine skin and hair color. Studies have observed that certain haplotypes near the ASIP gene are associated with differences in skin sensitivity to the sun, freckling, and hair color in European populations. It is important to note that these associations are statistical in nature, describing trends across large groups of people rather than predicting an individual's specific appearance. Because pigmentation is a polygenic trait—meaning it is influenced by the cumulative effect of many different genetic variants—the presence of a single SNP like rs17305573 provides only a small piece of the overall biological puzzle.
Population Frequency
The rs17305573 variant shows notable variation in frequency across different ancestral groups. In European populations, the minor allele frequency (MAF) is approximately 0.25. This means that a significant portion of the population carries at least one copy of the variant allele. Because allele frequencies can differ drastically between populations due to historical migration, natural selection, and genetic drift, the prevalence of this SNP is not uniform globally. Researchers often use these frequency differences to study the evolutionary history of human traits. When interpreting data on this variant, it is essential to consider that the observed associations are often specific to the ancestral background of the study participants and may not be directly applicable to other populations.
Interpreting Your Genetic Information
Information about variants like rs17305573 is primarily intended for educational and research purposes. While it is fascinating to learn how your DNA relates to physical traits, it is crucial to remember that genetics is not destiny. Many factors, including environmental exposure and the interaction of hundreds of other genes, play a much larger role in determining your physical characteristics than any single SNP. You cannot use this information to diagnose medical conditions or predict health outcomes. If you have concerns about skin health, sun sensitivity, or any other medical issues, always consult with a qualified healthcare professional or dermatologist. They can provide personalized advice based on your clinical history and physical examination, which are far more informative than a single genetic marker.
How common is this variant?
The rs17305573 variant has a minor allele frequency of approximately 0.25 in European populations.
Frequently asked questions
Does rs17305573 determine my skin color?
No, this variant does not determine your skin color on its own. Skin pigmentation is a complex trait influenced by many different genes and environmental factors, and this SNP only contributes a small amount to the overall variation.
Can I use this SNP to predict my risk of skin cancer?
While some variants in the ASIP region have been studied in the context of skin cancer risk, this SNP is not a diagnostic tool. You should never use genetic data to assess your personal health risk; always speak with a dermatologist for skin cancer screenings.
Is this variant found in all populations?
Genetic variants often vary in frequency across different ancestral groups. While this SNP is well-documented in European populations, its frequency and its association with traits may differ significantly in other global populations.
What should I do if I have the minor allele?
Having a specific genotype for this SNP is a normal part of human genetic diversity. It does not require any medical action, and you should continue to follow standard health advice, such as using sun protection, regardless of your genetic results.
Sources & further reading
Educational information only, last refreshed 9/30/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs17305573?
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 ASIP
Regulatory variant near ASIP associated with eye and hair pigmentation phenotypes in forensic appearance models.
Intronic variant in the ASIP locus associated with skin color variation.
Intergenic regulatory variant upstream of ASIP associated with skin pigmentation and tanning response.
This variant in the ASIP gene is associated with variations in skin pigmentation and photo-aging susceptibility.
A variant in the ASIP gene associated with eye and hair color variation.
Strong eQTL regulating agouti signaling protein expression and correlated with baseline skin pigmentation.