Abstract
Preferential repair of UV-induced damage is a phenomenon by which mammalian cells might enhance their survival. This paper presents the first evidence that preferential repair occurs in the lower eukaryote Saccharomyces cerevisiae. Moreover an unique approach is reported to compare identical sequences present on the same chromosome and only differing in expression. We determined the removal of pyrimidine dimers from two identical alpha-mating type loci and we were able to show that the active MAT alpha locus is repaired preferentially to the inactive HML alpha locus. In a sir-3 mutant, in which both loci are active this preference is not observed.
MeSH Terms
DNA Damage
DNA Repair
DNA, Fungal/isolation & purification,radiation effects
Deoxyribonucleases, Type II Site-Specific/radiation effects
Dose-Response Relationship, Radiation
Genes, Fungal/radiation effects
Mutation
Pyrimidine Dimers/radiation effects
Saccharomyces cerevisiae/genetics,radiation effects
Transcription, Genetic
Ultraviolet Rays
Chemicals
DNA, Fungal
Pyrimidine Dimers
endodeoxyribonuclease HaeII
Deoxyribonucleases, Type II Site-Specific
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Terleth C
Leiden University, Department of Molecular Genetics, The Netherlands.
van Sluis C A
van de Putte P
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