Kerato-epithelin mutations in four 5q31-linked corneal dystrophies.
Nat Genet
; 15(3): 247-51, 1997 Mar.
Article
em En
| MEDLINE
| ID: mdl-9054935
ABSTRACT
Granular dystrophy Groenouw type I (CDGG1), Reis-Bücklers (CDRB), lattice type I (CDL1) and Avellino (ACD) are four 5q31-linked human autosomal dominant corneal dystrophies. Clinically, they show progressive opacification of the cornea leading to severe visual handicap. The nature of the deposits remains unknown in spite of amyloid aetiology ascribed to the last two. We generated a YAC contig of the linked region and, following cDNA selection, recovered the beta ig-h3 gene. In six affected families we identified missense mutations. All detected mutations occurred at the CpG dinucleotide of two arginine codons R555W in one CDGG1, R555Q in one CDRB, R124C in two CDL1 and R124H in two ACD families. This suggests, as the last two diseases are characterized by amyloid deposits, that R124 mutated kerato-epithelin (the product of beta ig-h3) forms amyloidogenic intermediates that precipitate in the cornea. Our data establish a common molecular origin for the 5q31-linked corneal dystrophies.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cromossomos Humanos Par 5
/
Distrofias Hereditárias da Córnea
/
Proteínas da Matriz Extracelular
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Fator de Crescimento Transformador beta
/
Mutação Puntual
/
Proteínas de Neoplasias
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
Nat Genet
Ano de publicação:
1997
Tipo de documento:
Article