These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Missense mutants inactivate guanosine triphosphate cyclohydrolase I in hereditary progressive dystonia.
    Author: Ueno S, Hirano M.
    Journal: Brain Dev; 2000 Sep; 22 Suppl 1():S111-4. PubMed ID: 10984670.
    Abstract:
    Hereditary progressive dystonia (HPD) with marked diurnal fluctuation is caused by mutant guanosine triphosphate (GTP) cyclohydrolase I (GCH). The clinical presentation of dominant HPD varies considerably. We proposed the hypothesis that a relative increase of mutant GCH capable of inhibiting normal GCH is responsible for heterogeneous phenotypic manifestations. In a Japanese family with a novel G90V mutation, an affected heterozygote had a higher mutant/normal mRNA ratio than an unaffected heterozygote. Co-expression analysis showed that mutant enzyme (GCH-G90V) inactivated the normal enzyme in the COS cells. Similarly, GCH-G203R showed the dominant negative effects. These results supported our proposed hypothesis.
    [Abstract] [Full Text] [Related] [New Search]