Rad23 is required for transcription-coupled repair and efficient overrall repair in Saccharomyces cerevisiae.
The repair of UV-induced photoproducts (cyclobutane pyrimidine dimers) in a well-characterized minichromosome, genomic DNA, and a transcribed genomic gene (RPB2) of a rad23delta mutant of Saccharomyces care was examined. Isogenic wild-type cells show a strong bias for the repair of the transcribed strands in both the plasmid and genomic genes and efficient overall repair of both DNAs (>80% of the dimers were removed in 6 h). However, the rad23delta mutant shows (i) no strand bias for repair in these genes and decreased repair of both strands, (ii) partial repair of genomic DNA (approximately 45% in 6 h), and (iii) very poor repair of the plasmid overall approximately 15% in 6 h). These features, coupled with the decreased UV survival of rad23delta cells, indicate that Rad23 is required for both transcription-coupled repair and efficient overall repair in S. cerevisiae.
Mueller
J P
JP
Department of Biochemistry and Biophysics, Washington State University, Pullman, Washington 99164-4660, USA.
Smerdon
M J
MJ
D004260:DNA Repair; D004271:DNA, Fungal / Q000096:biosynthesis; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D004307:Dose-Response Relationship, Radiation; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism*; D005800:Genes, Fungal; D007700:Kinetics; D016296:Mutagenesis; D015183:Restriction Mapping; D012441:Saccharomyces cerevisiae / Q000235:genetics* / Q000378:metabolism* / Q000528:radiation effects; D029701:Saccharomyces cerevisiae Proteins; D013045:Species Specificity; D013997:Time Factors; D014158:Transcription, Genetic; D014466:Ultraviolet Rays
D004271:DNA, Fungal; D004268:DNA-Binding Proteins; D005656:Fungal Proteins; C490846:RAD23 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins