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. 1998 Apr;35(4):301–304. doi: 10.1136/jmg.35.4.301

Population genetics of hyperphenylalaninaemia resulting from phenylalanine hydroxylase deficiency in Portugal.

I Rivera 1, P Leandro 1, U Lichter-Konecki 1, I Tavares de Almeida 1, M C Lechner 1
PMCID: PMC1051278  PMID: 9598724

Abstract

In order to elucidate the molecular basis of phenylketonuria (PKU) in Portugal, a detailed study of the Portuguese mutant phenylalanine hydroxylase (PAH) genes was performed. A total of 222 mutant alleles from 111 PKU families were analysed for 26 mutations and restriction fragment length polymorphismlvariable number tandem repeat (RFLP/VNTR) haplotypes. It was possible to characterise 55% of the mutant alleles, in which 14 different mutations (R261Q, V388M, IVS10nt-11, I65T, P281L, R252W, R158Q, L348V, Y414C, L311P, Y198fsdel22bp, R408W, R270K, and R261X) and three polymorphisms (Q232Q, V245V, and L385L) were identified. A total of 14 different haplotypes were observed, with a high prevalence of haplotype 1 among mutant and normal alleles. The results reported in this study show considerable genetic heterogeneity in the Portuguese PKU population, as has also been described for other southern European populations.

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Selected References

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