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Mol Cell Biol. 1985 January; 5(1): 75-84

Specific Saccharomyces cerevisiae genes are expressed in response to DNA-damaging agents.

ABSTRACT

When exposed to DNA-damaging agents, the yeast Saccharomyces cerevisiae induces the expression of at least six specific genes. We have previously identified one damage inducible (DIN) gene as a gene fusion (din-lacZ fusion) whose expression increases in response to DNA-damaging treatments. We describe here the identification of five additional DIN genes as din-lacZ fusions and the responses of all six DIN genes to DNA-damaging agents. Northern blot analyses of the transcripts of two of the DIN genes show that their levels increase after exposure to DNA-damaging agents. Five of the din-lacZ fusions are induced in S. cerevisiae cells exposed to UV light, gamma rays, methotrexate, or alkylating agents. One of the din-lacZ fusions is induced by either UV or methotrexate but not by the other agents. This finding suggests that there are sets of DIN genes that are regulated differently.

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