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Human pigmentation genetics: the difference is only skin deep

R A Sturm¹, N F Box, M Ramsay

¹Centre for Molecular and Cellular Biology, University of Queensland, Brisbane, Australia. r.sturm@mailbox.uq.edu.au

Bioessays : News and Reviews in Molecular, Cellular and Developmental Biology

|November 20, 1998

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Melanin, a pigment produced by melanocytes, determines human skin and hair color. Genetic studies identified key genes like MSH receptor and P-protein influencing melanin levels and variations in human pigmentation.

Area of Science:

Human genetics and molecular biology
Biochemistry of pigmentation

Background:

Visual traits, particularly skin and hair color, are crucial for human interactions.
Melanin, a stable pigment, is the primary determinant of human coloration.
Understanding the genetic basis of melanin production is key to explaining human diversity.

Purpose of the Study:

To identify major human genes involved in melanin formation.
To investigate the genetic factors contributing to normal human color variation.
To explore the roles of specific candidate genes in regulating pigmentation.

Main Methods:

Comparative genomics approach for gene identification.
Molecular analysis of the melanocyte pigmentary process.
Examination of gene classes associated with hypopigmentation and skin/hair type.

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Main Results:

Key genes regulating melanin production have been identified.
MSH cell surface receptor and melanosomal P-protein are strong candidates for influencing pigmentation.
These genes may modulate the activity of melanogenic enzymes like tyrosinase, TRP-1, and TRP-2.

Conclusions:

Genetic regulation of melanin synthesis underlies human phenotypic variation.
Specific genes, including MSH receptor and P-protein, play significant roles in determining skin and hair color.
Further research into these genes can elucidate the mechanisms of human pigmentation.