A tyrosinase gene missense mutation in temperature-sensitive type I oculocutaneous albinism. A human homologue to the Siamese cat and the Himalayan mouse.
Type I oculocutaneous albinism (OCA) is an autosomal recessive disorder in which deficient synthesis of melanin pigment results from abnormal activity of melanocyte tyrosinase. A novel type I OCA phenotype in which hypopigmentation is related to local body temperature is associated with a missense substitution in tyrosinase, codon 422 CGG (Arg)----CAG (Gln). This substitution results in a tyrosinase polypeptide that is temperature-sensitive. This form of type I OCA thus is homologous to the temperature-related forms of albinism seen in the Siamese cat and the Himalayan mouse.
Giebel
L B
LB
Department of Medical Genetics, University of Wisconsin, Madison 53706.
Tripathi
R K
RK
King
R A
RA
Spritz
R A
RA
D000328:Adult; D016115:Albinism, Oculocutaneous / Q000201:enzymology / Q000235:genetics*; D000595:Amino Acid Sequence; D001483:Base Sequence; D005260:Female; D005796:Genes; D006801:Humans; D008969:Molecular Sequence Data; D014442:Monophenol Monooxygenase / Q000235:genetics*; D009154:Mutation; D010375:Pedigree; D016133:Polymerase Chain Reaction; D013329:Structure-Activity Relationship; D013696:Temperature
D014442:Monophenol Monooxygenase