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Xeroderma pigmentosum and trichothiodystrophy are associated with different mutations in the XPD (ERCC2) repair/transcription gene
- Source :
- Proceedings of the National Academy of Sciences of the United States of America. 94(16)
- Publication Year :
- 1997
-
Abstract
- The xeroderma pigmentosum group D (XPD) protein has a dual function, both in nucleotide excision repair of DNA damage and in basal transcription. Mutations in the XPD gene can result in three distinct clinical phenotypes, XP, trichothiodystrophy (TTD), and XP with Cockayne syndrome. To determine if the clinical phenotypes of XP and TTD can be attributed to the sites of the mutations, we have identified the mutations in a large group of TTD and XP-D patients. Most sites of mutations differed between XP and TTD, but there are three sites at which the same mutation is found in XP and TTD patients. Since the corresponding patients were all compound heterozygotes with different mutations in the two alleles, the alleles were tested separately in a yeast complementation assay. The mutations which are found in both XP and TTD patients behaved as null alleles, suggesting that the disease phenotype was determined by the other allele. If we eliminate the null mutations, the remaining mutagenic pattern is consistent with the site of the mutation determining the phenotype.
- Subjects :
- Xeroderma pigmentosum
DNA Repair
Ultraviolet Rays
Trichothiodystrophy
Biology
Compound heterozygosity
Cockayne syndrome
Cell Line
medicine
Humans
Xeroderma Pigmentosum Group D Protein
Genetics
Xeroderma Pigmentosum
Multidisciplinary
DNA Helicases
Proteins
Fibroblasts
Biological Sciences
medicine.disease
Molecular biology
Null allele
DNA-Binding Proteins
Transcription Factor TFIIH
Mutation
ERCC2
Hair Diseases
Nucleotide excision repair
Transcription Factors
Subjects
Details
- ISSN :
- 00278424
- Volume :
- 94
- Issue :
- 16
- Database :
- OpenAIRE
- Journal :
- Proceedings of the National Academy of Sciences of the United States of America
- Accession number :
- edsair.doi.dedup.....6af39785e7572423908c986f495d30d4