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. 1998 Jul 1;26(13):3247–3254. doi: 10.1093/nar/26.13.3247

Genetic characterisation of hda1+, a putative fission yeast histone deacetylase gene.

T G Olsson 1, K Ekwall 1, R C Allshire 1, P Sunnerhagen 1, J F Partridge 1, W A Richardson 1
PMCID: PMC147680  PMID: 9628926

Abstract

hda1+ (histone deacetylase 1) is a fission yeast gene which is highly similar in sequence to known histone deacetylase genes in humans and budding yeast. We have investigated if this putative histone deacetylase contributes to transcriptional silencing in the fission yeast Schizosaccharomyces pombe. A precise deletion allele of the hda1+ open reading frame was created. Cells lacking the hda1+ gene are viable. However, genetic analysis reveals that cells without hda1 + display enhanced gene repression/silencing of marker genes, residing adjacent to telomeres, close to the silent mating-type loci and within centromere I. This phenotype is very similar to that recently reported for rpd3 mutants both in Drosophila and budding yeast. No defects in chromosome segregation or changes in telomere length were detected. Cells lacking the hda1+ gene display reduced sporulation. Growth of hda1 cells is partially inhibited by low concentrations of Trichostatin A (TSA), a known inhibitor of histone deacetylase enzymes. TSA treatment is also able to overcome the enhanced silencing found in heterochromatic regions of hda1 cells. These results indicate a genetic redundancy with respect to deacetylase genes and partially overlapping functions of these in fission yeast. The significance of these results is discussed in the light of recent discoveries from other eukaryotes.

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Selected References

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