Genome-wide analysis of ARS (autonomously replicating sequence) binding factor 1 (Abf1p)-mediated transcriptional regulation in Saccharomyces cerevisiae

Tsuyoshi Miyake, Justin Reese, Christian M. Loch, David T. Auble, Rong Li

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34 Scopus citations

Abstract

Autonomously replicating sequence-binding factor-1 (Abf1p) is an essential sequence-specific transcription factor in Saccharomyces cerevisiae that participates in multiple nuclear events including DNA replication, transcription activation, and gene silencing. Numerous gene-specific analyses have implicated Abf1p in the transcriptional control of genes involved in a diverse range of cellular functions, leading to the notion that Abf1p acts as a global transcriptional regulator. Here we report findings from a genome-wide comparison of the gene expression profiles in the wild-type and abf1-1 temperature-sensitive mutant. The study identifies a total of 86 Abf1p-regulated genes (1.4% of the genome) of which 50 are activated and 36 are repressed by Abf1p. Interestingly, Abf1p binds to its own promoter in vivo and strongly represses its own transcription, suggesting a potential negative regulatory loop in Abf1p-mediated gene regulation. A comparison of our microarray data with the available databases reveals a significant overlap of genes regulated by Abf1p and those by several general transcription factors such as Mot1p and TAFs (TATA-binding protein-associated factors). Different mutant alleles of abf1 affect Abf1p-mediated transcription in a gene-dependent manner. Furthermore, Abf1p in vivo is associated with the promoter region of most Abf1p-activated but not with that of most Abf1p-repressed genes. Taken together, these results strongly suggest distinct underlying mechanisms by which Abf1p regulates gene expression.

Original languageEnglish (US)
Pages (from-to)34865-34872
Number of pages8
JournalJournal of Biological Chemistry
Volume279
Issue number33
DOIs
StatePublished - Aug 13 2004

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ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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