Compositions and methods for detecting polymorphisms associated with pigmentation
OwnerTony N. Frudakisinventor
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OwnerTony N. Frudakisinventor
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The invention relates to methods for inferring a genetic pigmentation trait of a human subject from a nucleic acid sample or a polypeptide sample of the subject, and compositions for practicing such methods. The methods of the invention are based, in part, on the identification of single nucleotide polymorphisms (SNPs) that, alone or in combination, allow an inference to be drawn as to a genetic pigmentation trait such as hair shade, hair color, eye shade, or eye color, and further allow an inference to be drawn as to race. A method of the invention can be performed, for example, by identifying in a nucleic acid sample at least one pigmentation-related haplotype allele of at least one pigmentation gene, and preferably a combination of pigmentation-related haplotypes alleles.
) A method for inferring eye color or eye shade of a human subject from a nucleic acid sample of the subject, the method comprising identifying in the nucleic acid sample at least one penetrant pigmentation-related haplotype allele of the following:
) The method of claim 1, further comprising identifying in the nucleic acid sample at least a second pigmentation-related haplotype allele of the following:
) The method of claim 2, further comprising identifying in the nucleic acid sample at least one nucleotide occurrence of a latent pigmentation-related SNP of a pigmentation gene, wherein the latent pigmentation-related SNP is nucleotide 61 of SEQ ID NO:25, nucleotide 201 of SEQ ID NO:26, nucleotide 201 of SEQ ID NO:27, nucleotide 201 of SEQ ID NO:28, nucleotide 657 of SEQ ID NO:29, nucleotide 599 of SEQ ID NO:30, nucleotide 267 of SEQ ID NO:31, nucleotide 61 of SEQ ID NO:32, nucleotide 451 of SEQ ID NO:33;
) The method of claim 1, further comprising identifying in the nucleic acid sample at least one latent pigmentation-related haplotype allele of a pigmentation gene, wherein the latent pigmentation-related haplotype allele is:
) The method of claim 2, wherein the pigmentation-related haplotype allele of MC1R-A is CCC.
) The method of claim 1, wherein the pigmentation-related haplotype allele of OCA2-A is TTA, CCAG, or TTAG.
) The method of claim 1, wherein the pigmentation-related haplotype allele of OCA2-B is CAA, CGA, CAC, or CGC, the pigmentation-related haplotype allele of OCA2-C is GGAA, TGAA, or TAAA, the pigmentation-related haplotype allele of OCA2-D is AGG or GGG, and the pigmentation-related haplotype allele of OCA2-E is GCA.
) The method of claim 1, wherein the pigmentation-related haplotype allele of TYRP1-B is TC.
) The method of claim 1, wherein the pigmentation-related haplotype allele of DCT-A is CTG or GTG.
) The method of claim 2, wherein the at least one penetrant pigmentation-related haplotype allele identified comprises the MC1R-A haplotype, the OCA2-A haplotype, the OCA2-B haplotype, the OCA2-C haplotype, the OCA-D haplotype, the OCA2-E haplotype, the TYRP1-B haplotype, and the DCT-B haplotype.
) The method of claim 10, wherein the subject is a Caucasian, the genetic pigmentation trait is eye shade or eye color, and the penetrant pigmentation-related haplotype allele is:
) The method of claim 4, comprising identifying in the nucleic acid sample alleles of
) The method of claim 4, wherein the combination of penetrant pigmentation-related haplotype alleles is:
) The method of claim 2, further comprising applying the pigment-related haplotype alleles to a matrix or contingency table created using a feature modeling algorithm.
) The method of claim 14, wherein the feature modeling algorithm is a quadratic classifier, performs correspondence analysis, or is a quadratic classifier and performs correspondence analysis.
) A method for inferring hair color or hair shade of a human subject from a nucleic acid sample of the subject, the method comprising identifying in the nucleic acid sample at least one penetrant pigmentation-related haplotype allele of the following:
) The method of claim 16, further comprising identifying in the nucleic acid sample at least a second pigmentation-related haplotype allele of the following:
) The method of claim 17, wherein at least one penetrant pigmentation-related haplotype allele is:
) The method of claim 17, further comprising identifying in the nucleic acid sample, at least one latent pigmentation-related SNP of a pigmentation gene.
) The method of claim 17, wherein the at least one penetrant pigmentation-related haplotype allele identified comprises the ASIP-B haplotype, the MC1R-A haplotype, the OCA2-G haplotype, the OCA2-H haplotype, the OCA2-I haplotype, the OCA2-J and the TYRP1-C haplotype.