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A genomewide association study of skin pigmentation in a South Asian population.

We have conducted a multistage genomewide association study, using 1,620,742 single-nucleotide polymorphisms to systematically investigate the genetic factors influencing intrinsic skin pigmentation in a population of South Asian descent. Polymorphisms in three genes--SLC24A5, TYR, and SLC45A2--yielded highly significant replicated associations with skin-reflectance measurements, an indirect measure of melanin content in the skin. The associations detected in these three genes, in an additive manner, collectively account for a large fraction of the natural variation of skin pigmentation in a South Asian population. Our study is the first to interrogate polymorphisms across the genome, to find genetic determinants of the natural variation of skin pigmentation within a human population.

Pubmed ID: 17999355 RIS Download

Mesh terms: Antigens, Neoplasm | Antiporters | Bangladesh | Gene Frequency | Genome, Human | Humans | India | Melanins | Membrane Transport Proteins | Pakistan | Phenotype | Polymorphism, Single Nucleotide | Skin Physiological Phenomena | Skin Pigmentation | Sri Lanka

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dbSNP

Database as central repository for both single base nucleotide substitutions and short deletion and insertion polymorphisms. Distinguishes report of how to assay SNP from use of that SNP with individuals and populations. This separation simplifies some issues of data representation. However, these initial reports describing how to assay SNP will often be accompanied by SNP experiments measuring allele occurrence in individuals and populations. Community can contribute to this resource.

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