The bromodomain-containing protein Bdf1p acts as a phenotypic and transcriptional multicopy suppressor of YAF9 deletion in yeast

Michele M. Bianchi, Giovanna Costanzo, Anna Chelstowska, Dorota Grabowska, Cristina Mazzoni, Eugenia Piccinni, Antonella Cavalli, Francesca Ciceroni, Joanna Rytka, Piotr P. Slonimski, Laura Frontali, Rodolfo Negri

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Abstract

It was observed previously that the deletion of the open reading frame YWL107w (YAF9) was highly pleiotropic in yeast and caused defective growth phenotypes in the presence of several unrelated inhibitors, including caesium chloride. We have selected multicopy extragenic suppressor genes, revealing that this phenotype can be suppressed by overdosing the transcription factors BDF1 and GAT1 in the yaf9Δ strain. We focused our analysis on suppression by BDF1 and performed a genome-wide transcript analysis on a yaf9Δ strain, compared with the wild-type and BOF1-suppressed strains. YAF9 deletion has a clear effect on transcription and leads to modulation of the level of expression of several genes. Transcription of a considerable portion of the underexpressed genes is restored to wild-type levels in the BDF1-suppressed strain. We show by chromatin immunoprecipitation that both Yaf9p and Bdf1p bind to promoters of some of these genes and that the level of H3 and H4 acetylation at one of these promoters is significantly low-ered in the yaf9 deleted strain, compared with the wild-type and the BDF1-suppressed strains.

Original languageEnglish
Pages (from-to)953-968
Number of pages16
JournalMolecular Microbiology
Volume53
Issue number3
DOIs
Publication statusPublished - Aug 2004

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ASJC Scopus subject areas

  • Molecular Biology
  • Microbiology

Cite this

Bianchi, M. M., Costanzo, G., Chelstowska, A., Grabowska, D., Mazzoni, C., Piccinni, E., Cavalli, A., Ciceroni, F., Rytka, J., Slonimski, P. P., Frontali, L., & Negri, R. (2004). The bromodomain-containing protein Bdf1p acts as a phenotypic and transcriptional multicopy suppressor of YAF9 deletion in yeast. Molecular Microbiology, 53(3), 953-968. https://doi.org/10.1111/j.1365-2958.2004.04184.x