RPD1 (SIN3/UME4) is required for maximal activation and repression of diverse yeast genes.
We show that the extent of transcriptional regulation of many, apparently unrelated, genes in Saccharomyces cerevisiae is dependent on RPD1 (and RPD3 [M. Vidal and R. F. Gaber, Mol. Cell. Biol. 11:6317-6327, 1991]). Genes regulated by stimuli as diverse as external signals (PHO5), cell differentiation processes (SPO11 and SPO13), cell type (RME1, FUS1, HO, TY2, STE6, STE3, and BAR1), and genes whose regulatory signals remain unknown (TRK2) depend on RPD1 to achieve maximal states of transcriptional regulation. RPD1 enhances both positive and negative regulation of these genes: in rpd1 delta mutants, higher levels of expression are observed under repression conditions and lower levels are observed under activation conditions. We show that several independent genetic screens, designed to identify yeast transcriptional regulators, have detected the RPD1 locus (also known as SIN3, SD11, and UME4). The inferred RPD1 protein contains four regions predicted to take on helix-loop-helix-like secondary structures and three regions (acidic, glutamine rich, and proline rich) reminiscent of the activating domains of transcriptional activators.
Vidal
M
M
Department of Biochemistry, Molecular Biology, Northwestern University, Evanston, Illinois 60208-3500.
Strich
R
R
Esposito
R E
RE
Gaber
R F
RF
D000483:Alleles; D000595:Amino Acid Sequence; D003001:Cloning, Molecular; D005656:Fungal Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D015966:Gene Expression Regulation, Fungal; D005800:Genes, Fungal; D006238:Haploidy; D006655:Histone Deacetylases; D008969:Molecular Sequence Data; D012097:Repressor Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D015183:Restriction Mapping; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins; D016415:Sequence Alignment; D014157:Transcription Factors / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D014158:Transcription, Genetic
D005656:Fungal Proteins; D012097:Repressor Proteins; C071731:SIN3 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors; D006655:Histone Deacetylases