The Mechanism of Nucleotide Excision Repair-Mediated UV-Induced Mutagenesis in Nonproliferating Cells
نویسندگان
چکیده
منابع مشابه
The mechanism of nucleotide excision repair-mediated UV-induced mutagenesis in nonproliferating cells.
Following the irradiation of nondividing yeast cells with ultraviolet (UV) light, most induced mutations are inherited by both daughter cells, indicating that complementary changes are introduced into both strands of duplex DNA prior to replication. Early analyses demonstrated that such two-strand mutations depend on functional nucleotide excision repair (NER), but the molecular mechanism of th...
متن کاملChronic low-dose ultraviolet-induced mutagenesis in nucleotide excision repair-deficient cells
UV radiation induces two major types of DNA lesions, cyclobutane pyrimidine dimers (CPDs) and 6-4 pyrimidine-pyrimidine photoproducts, which are both primarily repaired by nucleotide excision repair (NER). Here, we investigated how chronic low-dose UV (CLUV)-induced mutagenesis occurs in rad14Δ NER-deficient yeast cells, which lack the yeast orthologue of human xeroderma pigmentosum A (XPA). Th...
متن کاملMolecular mechanism of nucleotide excision repair.
From its very beginning, life has faced the fundamental problem that the form in which genetic information is stored is not chemically inert. DNA integrity is challenged by the damaging effect of numerous chemical and physical agents, compromizing its function. To protect this Achilles heel, an intricate network of DNA repair systems has evolved early in evolution. One of these is nucleotide ex...
متن کاملThe Role of Nucleotide Excision Repair in Restoring Replication Following UV-Induced Damage in Escherichia coli
Following low levels of UV exposure, Escherichia coli cells deficient in nucleotide excision repair (uvrA6 mutants) recover and synthesize DNA at near wild type levels, an observation that formed the basis of the post-replication recombination repair model. In this study, we characterized the DNA synthesis that occurs following UV-irradiation in the absence of nucleotide excision repair and sho...
متن کاملThe role of nucleotide excision repair in protecting embryonic stem cells from genotoxic effects of UV-induced DNA damage.
In this study the role of nucleotide excision repair (NER) in protecting mouse embryonic stem (ES) cells against the genotoxic effects of UV-photolesions was analysed. Repair of cyclobutane pyrimidine dimers (CPD) in transcribed genes could not be detected whereas the removal of (6-4) photoproducts (6-4PP) was incomplete, already reaching its maximum (30%) 4 h after irradiation. Measurements of...
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ژورنال
عنوان ژورنال: Genetics
سال: 2013
ISSN: 1943-2631
DOI: 10.1534/genetics.112.147421