Mutation spectrum and phenylalanine hydroxylase RFLP/VNTR background in 44 Romanian phenylketonuric alleles.
Hum Mutat
; 12(5): 314-9, 1998.
Article
en En
| MEDLINE
| ID: mdl-9792407
The mutation spectrum and polymorphic haplotype background in 22 Romanian families have been analysed in this study using the restriction digestion of phenylalanine hydroxylase (PAH) regions specifically amplified or the DGGE/direct sequencing methods. Eleven PAH mutations specifically associated with six mutant haplotypes were detected. In spite of the relative heterogeneity of the molecular defects in the PAH gene, three mutations covered almost 70% of all alleles: R408W, 47.72%, 21/44; K363fsdelG 13.63%, 6/44; and P225T 6.81%, 3/44. Among these, R408W, the most frequent mutation in our population, represented 50% of all the phenylketonuric (PKU) chromosomes. Splice mutation IVS12nt1g-->a affected two PAH alleles (4.54%); the remaining seven mutations were rare, each having an effect on just one chromosome (1/44), resulting in a relative frequency of 2.27%. A high frequency was observed in our PKU samples for the relatively uncommon mutations, K363fsdelG and P225T mutation, suggesting a possible founder effect at origin. Within the investigated panel, these mutations, both very rare among other Caucasians were exclusively linked to haplotype 5.8 and 1.7, respectively. These results provide a basis for the development of a routine molecular analysis of Romanian PKU families.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Fenilalanina Hidroxilasa
/
Fenilcetonurias
/
Polimorfismo de Longitud del Fragmento de Restricción
/
Repeticiones de Minisatélite
/
Mutación
Límite:
Adult
/
Child
/
Female
/
Humans
/
Male
País/Región como asunto:
Europa
Idioma:
En
Revista:
Hum Mutat
Asunto de la revista:
GENETICA MEDICA
Año:
1998
Tipo del documento:
Article
País de afiliación:
Rumanía
Pais de publicación:
Estados Unidos