Cited by 378melanin and skin pigmentationGenetic Associations and EpidemiologyGenetic Mapping and Diversity in Plants and Animals

A Single SNP in an Evolutionary Conserved Region within Intron 86 of the HERC2 Gene Determines Human Blue-Brown Eye Color

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Sturm, Richard A., Duffy, David L., Zhao, Zhen Zhen, Leite, Fabio P.N., Stark, Mitchell S., Hayward, Nicholas K., Martin, Nicholas G., Montgomery, Grant W.·2008·The American Journal of Human Genetics

Abstract

We have previously demonstrated that haplotypes of three single nucleotide polymorphisms (SNPs) within the first intron of the OCA2 gene are extremely strongly associated with variation in human eye color. In the present work, we describe additional fine association mapping of eye color SNPs in the intergenic region upstream of OCA2 and within the neighboring HERC2 (hect domain and RLD2) gene. We screened an additional 92 SNPs in 300-3000 European individuals and found that a single SNP in intron 86 of HERC2, rs12913832, predicted eye color significantly better (ordinal logistic regression R(2) = 0.68, association LOD = 444) than our previous best OCA2 haplotype. Comparison of sequence alignments of multiple species showed that this SNP lies in the center of a short highly conserved sequence and that the blue-eye-associated allele (frequency 78%) breaks up this conserved sequence, part of which forms a consensus binding site for the helicase-like transcription factor (HLTF). We were also able to demonstrate the OCA2 R419Q, rs1800407, coding SNP acts as a penetrance modifier of this new HERC2 SNP for eye color, and somewhat independently, of melanoma risk. We conclude that the conserved region around rs12913832 represents a regulatory region controlling constitutive expression of OCA2 and that the C allele at rs12913832 leads to decreased expression of OCA2, particularly within iris melanocytes, which we postulate to be the ultimate cause of blue eye color.

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Crossref · 10.1016/j.ajhg.2007.11.005

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  • The SNP responsible for pigmentation variation in OCA2 is not located within the protein-coding region but within a putative regulatory region located within an upstream gene (rs12913832).

    “Unlike for the MATP and NCKX5 proteins however, the SNP responsible for pigmentation variation is not located within the protein-coding region of the OCA2 gene, but rather within a putative regulatory region located within an upstream gene (rs12913832, Sturm et al., 2008).”
  • The observed lower OCA2 mRNA in C/C cells is consistent with the predicted function of the conserved region surrounding rs12913832 as a locus control region for OCA2.

    “This is consistent with the predicted function for the conserved region surrounding the rs12913832 SNP acting as a locus control region for OCA2 (Sturm et al., 2008).”
  • The eye color locus was later refined to a small region 50 kb upstream of OCA2 in an intron of the HERC2 gene.

    “This eye color locus was later refined to a small region 50 kb upstream of OCA2 in an intron of the HERC2 gene [7], [8], [10].”
  • Sturm et al. (2008) concluded that the derived allele of rs1800407 increased the penetrance of the blue eye phenotype associated with the derived allele of rs12913832.

    “Sturm et al. (2008) concluded that the derived allele of rs1800407 increased the penetrance of the blue eye phenotype associated with the derived allele of rs12913832.”

    From A global view of the OCA2-HERC2 region and pigmentation (2012) · cites this paper as Sturm et al. 2008

  • OCA2 has been implicated in iris, skin, and hair pigmentation in humans.

    “In humans, it has been implicated in iris, skin, and hair pigmentation (Duffy et al. 2007; Sturm et al. 2008; Kayser et al. 2008; Sulem et al. 2007).”

    From A global view of the OCA2-HERC2 region and pigmentation (2012) · cites this paper as Sturm et al. 2008

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Authors
Sturm, R. A., Duffy, D. L., Zhao, Z. Z., Leite, F. P. N., Stark, M. S., Hayward, N. K., Martin, N. G., & Montgomery, G. W.
Affiliations
  • The University of Queensland (AU)
  • QIMR Berghofer Medical Research Institute (AU)
Corresponding author
Montgomery, Grant W.
Venue
The American Journal of Human Genetics
Publisher
Elsevier BV
Published
2008-02
Volume
82
Issue
2
Pages
424-431
ISSN
0002-9297 (ISSN-L)
OpenAlex
W2160460000
Cited by
378
References
54
Citations by year
2026: 11 · 2025: 9 · 2024: 20 · 2023: 12 · 2022: 20 · 2021: 26 · 2020: 16 · 2019: 19 · 2018: 24 · 2017: 15 · 2016: 18 · 2015: 21 · 2014: 23 · 2013: 29 · 2012: 26
FWCI
12.97
Type
journal article
Language
en
Open access
Locations
  • The American Journal of Human Genetics (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Cancer Institute (R01CA088363, CA88363)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › melanin and skin pigmentation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Mapping and Diversity in Plants and Animals
Keywords
eye color, HERC2, OCA2, single nucleotide polymorphisms, blue eyes, conserved sequences, HLTF, transcriptional regulation, melanogenesis, melanoma risk, fine mapping
MeSH terms
Adolescent, Base Sequence, Chromosome Mapping, DNA-Binding Proteins, Eye Color, Gene Expression Regulation, Gene Frequency, Genotype, Humans, Introns, Lod Score, Molecular Sequence Data, Transcription Factors, Twins, Sequence Alignment, Conserved Sequence, Sequence Analysis, DNA, Polymorphism, Single Nucleotide, Guanine Nucleotide Exchange Factors, Membrane Transport Proteins, Ubiquitin-Protein Ligases

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