Albinism Research Today is a free monthly online journal that collates and summarizes the latest research about Albinism, including details on pigmentation, genetic trait, heritability.

Oculocutaneous albinism type 4: six novel mutations in the membrane-associated transporter protein gene and their phenotypes.

Inagaki K, Suzuki T, Ito S, Suzuki N, Adachi K, Okuyama T, Nakata Y, Shimizu H, Matsuura H, Oono T, Iwamatsu H, Kono M, Tomita Y

Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan.

Oculocutaneous albinism type 4 (OCA4) is an autosomal recessive hypopigmentary disorder caused by mutations in the Membrane-Associated Transporter Protein gene (SLC45A2). The SLC45A2 protein is a 530-amino-acid polypeptide that contains 12 putative transmembrane domains, and appears to be a transporter that mediates melanin synthesis. Eighteen pathological mutations have been reported so far. In this study, six novel mutations, p.Y49C (c.146A > G), p.G89R (c.265G > A), p.C229Y (c.686G > A), p.T437A (c.1309A > G), p.T440A (c.1318A > G) and p.G473D (c.1418G > A) were found in eight Japanese patients with various clinical phenotypes. The phenotypes of OCA4 were as various as the other types of OCA and probably depended on the mutation sites in the SLC45A2 gene.

Published 12 September 2006 in Pigment Cell Res, 19(5): 451-3.
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