A common point mutation in the tyrosine hydroxylase gene in autosomal recessive L-DOPA-responsive dystonia in the Dutch population.
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van den Heuvel LP, Luiten B, Smeitink JA, de Rijk-van Andel JF, Hyland K, Steenbergen-Spanjers GC, Janssen RJ, Wevers RA
A common point mutation in the tyrosine hydroxylase gene in autosomal recessive L-DOPA-responsive dystonia in the Dutch population.
Hum Genet. 1998 Jun;102(6):644-6.
- PubMed ID
- 9703425 [ View in PubMed]
- Abstract
This report concerns one new mutation in the tyrosine hydroxylase (TH) gene in three patients originating from three unrelated Dutch families with autosomal recessive L-DOPA-responsive dystonia (DRD). In this study, all exons of the TH gene were amplified by the polymerase chain reaction and subjected to analyses by single-strand conformation polymorphism. An aberrant migration pattern was observed for exon 6 of the TH gene in all patients. Direct sequencing of the coding region of exon 6 revealed the presence of one novel missense mutation. An a698g transition resulted in the substitution of the evolutionary conserved arginine 233 by a histidine (R233H). All patients were homozygous for the mutation. This new mutation in the TH gene was confirmed by restriction enzyme analysis with the restriction enzyme HhaI. Thus, a high proportion of defective TH alleles may be R233H in The Netherlands.