African origin of an intragenic deletion of the human P gene in tyrosinase positive oculocutaneous albinism.
Nat Genet
; 7(2): 176-9, 1994 Jun.
Article
em En
| MEDLINE
| ID: mdl-7920637
ABSTRACT
Oculocutaneous albinism (OCA) is a genetically heterogeneous hypopigmentation disorder. One of the two major autosomal recessive forms involves the tyrosinase gene (OCA1), while the other form (OCA2) has recently been associated with alterations of the P gene on chromosome 15. OCA2 is about twice as common as OCA1 in African and African-American populations. We now describe an interstitial deletion that removes a single exon of the P gene. In a large family from an inbred population of tri-racial origin, all individuals with OCA2 were found to be homozygous for this allele. Moreover, the same mutant P allele was detected in several unrelated African American individuals with OCA2, but not in Caucasians with OCA2. The detection of the same allele in two unrelated Africans with OCA2 indicates an African origin for this allele.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Albinismo Oculocutâneo
/
Monofenol Mono-Oxigenase
/
Deleção de Sequência
Limite:
Female
/
Humans
/
Male
País/Região como assunto:
Africa
/
America do norte
Idioma:
En
Ano de publicação:
1994
Tipo de documento:
Article