Abstract
The cDNA from activated mutants of the homologous transcription factors Pdr1p and Pdr3p was used to screen DNA microarrays of the Saccharomyces cerevisiae complete genome. Twenty-six overexpressed targets of the PDR1-3 and/or PDR3-7 mutants were identified. Twenty-one are new targets, the majority of which are of unknown function. In addition to well known ABC transporters, these targets appear to be involved in transport or in membrane lipids and cell wall biosyntheses. Several of the targets seem to contribute to the cell defence against a variety of stresses. Pdr1p and Pdr3p do not act similarly on all targets. Unexpectedly, the expression of 23 other genes appeared to be repressed in the PDR1-3 and/or PDR3-7 mutants. In contrast to the majority of the activated genes, none of the repressed genes contains pleiotropic drug resistance binding sites in their promoter.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Base Sequence
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Binding Sites
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Biological Transport
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Cell Wall / metabolism
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DNA-Binding Proteins / genetics
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DNA-Binding Proteins / metabolism
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Drug Resistance, Microbial / genetics*
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Drug Resistance, Multiple / genetics
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Fungal Proteins / classification
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Fungal Proteins / genetics
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Fungal Proteins / physiology
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Gene Expression Regulation, Fungal / genetics
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Genes, Fungal / genetics
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Genes, Fungal / physiology
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Genome, Fungal*
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Lipid Metabolism
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Mutation / genetics*
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Oligonucleotide Array Sequence Analysis*
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Promoter Regions, Genetic / genetics
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RNA, Fungal / genetics
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RNA, Fungal / metabolism
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RNA, Messenger / genetics
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RNA, Messenger / metabolism
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Response Elements / genetics
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Saccharomyces cerevisiae / cytology
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Saccharomyces cerevisiae / enzymology
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Saccharomyces cerevisiae / genetics*
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Saccharomyces cerevisiae / metabolism
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Saccharomyces cerevisiae Proteins
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Trans-Activators / genetics
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Trans-Activators / metabolism
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Transcription Factors / genetics
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Transcription Factors / metabolism
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Transcriptional Activation / genetics*
Substances
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DNA-Binding Proteins
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Fungal Proteins
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PDR1 protein, S cerevisiae
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PDR3 protein, S cerevisiae
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RNA, Fungal
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RNA, Messenger
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Saccharomyces cerevisiae Proteins
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Trans-Activators
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Transcription Factors