Dihydropyrimidinase Deficiency: Structural Organization, Chromosomal Localization, and Mutation Analysis of the Human Dihydropyrimidinase Gene
| Autor: | M Kouwaki, Masaru Nonaka, Yoshiro Wada, Jan J. Rotteveel, Makoto Sasaki, R.A. de Abreu, M Imaeda, Satoshi Sumi, A. B. P. Van Kuilenburg, Peter Vreken, Y Endo, Koichi Matsuda, Satoru Ohba, Naoki Hamajima, Kiyoshi Kidouchi, A. H. van Gennip, H Togari, Nanaya Tamaki |
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| Přispěvatelé: | Other departments |
| Rok vydání: | 1998 |
| Předmět: |
Adult
Male Purine-Pyrimidine Metabolism Inborn Errors endocrine system DNA Mutational Analysis Biology Transfection medicine.disease_cause Purine en pyrimidine metabolisme in relatie tot maligne aandoeningen en andere ziekten Expression analysis Amidohydrolases Frameshift mutation Exon Japan Genetics medicine Animals Humans Missense mutation Genetics(clinical) Cloning Molecular Child Frameshift Mutation Gene In Situ Hybridization Fluorescence Genetics (clinical) Purine and pyrimidine metabolism in relation with malignant disorders and other diseases Mutation Base Sequence Dihydropyrimidinuria Homozygote Chromosome Mapping Genomic DNA cloning Exons 5-Fluorouracil toxicity Purine/pyrimidine metabolism Molecular biology Recombinant Proteins Pedigree Mutation analysis Karyotyping Dihydropyrimidinase COS Cells Mutagenesis Site-Directed Mutation testing Female Research Article Chromosomes Human Pair 8 |
| Zdroj: | American Journal of Human Genetics, 63, 717-726 American journal of human genetics, 63(3), 717-726. Cell Press American Journal of Human Genetics, 63, pp. 717-726 |
| ISSN: | 0002-9297 |
| Popis: | SummaryDihydropyrimidinase (DHP) deficiency (MIM 222748) is characterized by dihydropyrimidinuria and is associated with a variable clinical phenotype. This disease might be associated with a risk of 5-fluorouracil toxicity, although no cases have been reported. We present here both the molecular characterization of the human DHP gene and, for the first time, the mutations causing DHP deficiency. The human DHP gene spans >80 kb and consists of 10 exons. It has been assigned to 8q22, by FISH. We performed mutation analysis of genomic DNA in one symptomatic and five asymptomatic individuals presenting with dihydropyrimidinuria. We identified one frameshift mutation and five missense mutations. Two related Japanese adult subjects were homozygous for the Q334R substitution, whereas two other, unrelated Japanese infant subjects were heterozygous for the same mutation, but this mutation is not common in the Japanese population. A Caucasian pediatric patient exhibiting epileptic attacks, dysmorphic features, and severe developmental delay was homozygous for W360R. Using a eukaryotic expression system, we showed that all mutations reduced enzyme activity significantly, indicating that these are crucial DHP deficiency–causing mutations. There was no significant difference, in residual activity, between mutations observed in the symptomatic and those observed in the asymptomatic individuals. |
| Databáze: | OpenAIRE |
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