Oculocutaneous albinism type 4: six novel mutations in the membrane-associated transporter protein gene and their phenotypes |
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Authors: | Inagaki Katsuhiko Suzuki Tamio Ito Shiro Suzuki Noriyuki Adachi Koji Okuyama Torayuki Nakata Yusei Shimizu Hiroshi Matsuura Hironori Oono Takashi Iwamatsu Hiroko Kono Michihiro Tomita Yasushi |
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Institution: | Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan. |
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Abstract: | 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. |
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