Association of the SLC45A2 gene with physiological human hair colour variation
Abstract
Pigmentation is a complex physical trait with multiple genes involved. Several genes have already been associated with natural differences in human pigmentation. The SLC45A2 gene encoding a transporter protein involved in melanin synthesis is considered to be one of the most important genes affecting human pigmentation. Here we present results of an association study conducted on a population of European origin, where the relationship between two non-synonymous polymorphisms in the SLC45A2 gene — rs26722 (E272K) and rs16891982 (L374F) — and different pigmentation traits was examined. The study revealed a significant association between both variable sites and normal variation in hair colour. Only L374F remained significantly associated with hair colour when both SNPs were included in a logistic regression model. No association with other pigmentation traits was detected in this population sample. Our results indicate that the rare allele L374 significantly increases the possibility of having black hair colour (OR = 7.05) and thus may be considered as a future marker for black hair colour prediction.
Keywords
Pigmentation SLC45A2 Association study E272K L374F Phenotype predictionNotes
Acknowledgments
We would like to thank all volunteers who participated in this investigation and donated biological samples. We also wish to thank Ronan Doyle, Olga Rydzyk, and Magda Łącka for their contribution to this project. The study was supported by the Ministry of Science and Higher Education, grant no. 0T00C01829 and by the Institute of Forensic Research in Krakow, grant no. I/G/2007.
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