1. Mutations of the tyrosinase gene in Indo-Pakistani patients with type I (tyrosinase-deficient) oculocutaneous albinism (OCA).
- Author
-
Tripathi RK, Bundey S, Musarella MA, Droetto S, Strunk KM, Holmes SA, and Spritz RA
- Subjects
- Adolescent, Adult, Albinism, Oculocutaneous enzymology, Albinism, Oculocutaneous ethnology, Amino Acid Sequence, Base Sequence, Child, Cloning, Molecular, Consanguinity, DNA Primers chemistry, Electrophoresis, Polyacrylamide Gel, Exons, Female, Humans, India ethnology, Infant, Male, Molecular Sequence Data, Pakistan ethnology, Polymorphism, Restriction Fragment Length, Sequence Analysis, DNA, Albinism, Oculocutaneous genetics, Monophenol Monooxygenase genetics, Mutation
- Abstract
Oculocutaneous albinism (OCA) is a group of autosomal recessive disorders characterized by deficient synthesis of melanin pigment. Type I (tyrosinase-deficient) OCA results from mutations of the tyrosinase gene (TYR gene) encoding tyrosinase, the enzyme that catalyzes the first two steps of melanin biosynthesis. Mutations of the TYR gene have been identified in a large number of patients, most of Caucasian ethnic origin, with various forms of type I OCA. Here, we present an analysis of the TYR gene in eight Indo-Pakistani patients with type I OCA. We describe four novel TYR gene mutations and a fifth mutation previously observed in a Caucasian patient.
- Published
- 1993