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J. Bacteriol., 01 1995, 364-371, Vol 177, No. 2
MS Reagan, C Pittenger, W Siede and EC Friedberg
We have constructed a strain of Saccharomyces cerevisiae with a deletion of
the YKL510 open reading frame, which was initially identified in chromosome
XI as a homolog of the RAD2 nucleotide excision repair gene (A. Jacquier,
P. Legrain, and B. Dujon, Yeast 8:121-132, 1992). The mutant strain
exhibits increased sensitivity to UV light and to the alkylating agent
methylmethane sulfonate but not to ionizing radiation. We have renamed the
YKL510 open reading frame the RAD27 gene, in keeping with the accepted
nomenclature for radiation- sensitive yeast mutants. Epistasis analysis
indicates that the gene is in the RAD6 group of genes, which are involved
in DNA damage tolerance. The mutant strain also exhibits increased plasmid
loss, increased spontaneous mutagenesis, and a temperature-sensitive
lethality whose phenotype suggests a defect in DNA replication. Levels of
the RAD27 gene transcript are cell cycle regulated in a manner similar to
those for several other genes whose products are known to be involved in
DNA replication. We discuss the possible role of Rad27 protein in DNA
repair and replication.
Copyright © 1995, American Society for Microbiology
Characterization of a mutant strain of Saccharomyces cerevisiae with a deletion of the RAD27 gene, a structural homolog of the RAD2 nucleotide excision repair gene
Department of Pathology, University of Texas Southwestern Medical Center, Dallas 75235.
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