Regulation of RAD54- and RAD52-lacZ gene fusions in Saccharomyces cerevisiae in response to DNA damage

Journal Article · Sun Mar 01 00:00:00 EST 1987 · Mol. Cell. Biol.; (United States)

DOI:https://doi.org/10.1128/MCB.7.3.1078· OSTI ID:6612414

Cole, G M; Schild, D; Lovett, S T; Mortimer, R K

The RAD52 and RAD54 genes in the yeast Saccharomyces cerevisiae are involved in both DNA repair and DNA recombination. RAD54 has recently been shown to be inducible by X-rays, while RAD52 is not. To further investigate the regulation of these genes, we constructed gene fusions using 5' regions upstream of the RAD52 and RAD54 genes and a 3'-terminal fragment of the Escherichia coli beta-galactosidase gene. Yeast transformants with either an integrated or an autonomously replicating plasmid containing these fusions expressed beta-galactosidase activity constitutively. In addition, the RAD54 gene fusion was inducible in both haploid and diploid cells in response to the DNA-damaging agents X-rays, UV light, and methyl methanesulfonate, but not in response to heat shock. The RAD52-lacZ gene fusion showed little or no induction in response to X-ray or UV radiation nor methyl methanesulfonate. Typical induction levels for RAD54 in cells exposed to such agents were from 3- to 12-fold, in good agreement with previous mRNA analyses. When MATa cells were arrested in G1 with alpha-factor, RAD54 was still inducible after DNA damage, indicating that the observed induction is independent of the cell cycle. Using a yeast vector containing the EcoRI structural gene fused to the GAL1 promoter, we showed that double-strand breaks alone are sufficient in vivo for induction of RAD54.

• Research Organization: Univ. of California, Berkeley, CA (United States)
• OSTI ID: 6612414
• Journal Information: Mol. Cell. Biol.; (United States), Vol. 3
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
59 BASIC BIOLOGICAL SCIENCES
SACCHAROMYCES CEREVISIAE
DNA REPAIR
GENE REGULATION
CELL CYCLE
ENZYME ACTIVITY
HEAT
METHYL METHANESULFONATE
PLASMIDS
STRAND BREAKS
ULTRAVIOLET RADIATION
X RADIATION
BIOLOGICAL RECOVERY
BIOLOGICAL REPAIR
CELL CONSTITUENTS
ELECTROMAGNETIC RADIATION
ENERGY
ESTERS
FUNGI
IONIZING RADIATIONS
MICROORGANISMS
MUTAGENS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PLANTS
RADIATIONS
RECOVERY
REPAIR
SACCHAROMYCES
SULFONIC ACID ESTERS
YEASTS
560130* - Radiation Effects on Microorganisms
550400 - Genetics