Genetic evidence that Ras-like GTPases, Gtr1p, and Gtr2p, are involved in epigenetic control of gene expression in Saccharomyces cerevisiae

Takeshi Sekiguchi, Naoyuki Hayashi, Yonggang Wang, Hideki Kobayashi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Gtr1p and Gtr2p of Saccharomyces cerevisiae are members of the Ras-like GTP binding family and interact genetically with Prp20p (yeast RCC1), which is a guanine nucleotide exchange factor for Gsp1p (yeast homolog of Ran, involved in nuclear export). Recently, Gtr1p and Gtr2p were suggested to be molecular switches in the rapamycin-sensitive TOR signaling pathway. Here, we show that Gtr1p and Gtr2p genetically interact with the chromatin remodeling factor Ino80p. Gtr2p interacted physically with both Rvb1p and Rvb2p. Consistent with these results, Gtr2p localized to chromatin and could activate transcription. Gtr1p and Gtr2p were found to be involved in chromatin silencing in the vicinity of telomeres. Gtr1p and Gtr2p were required to repress nitrogen catabolite-repressed genes, which are repressed by the TOR signaling pathway. We propose that Gtr1p and Gtr2p are involved in epigenetic control of gene expression in the TOR signaling pathway.

Original languageEnglish
Pages (from-to)748-754
Number of pages7
JournalBiochemical and Biophysical Research Communications
Volume368
Issue number3
DOIs
Publication statusPublished - Apr 11 2008

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ras Proteins
GTP Phosphohydrolases
Epigenomics
Gene expression
Yeast
Chromatin
Saccharomyces cerevisiae
Yeasts
Guanine Nucleotide Exchange Factors
Gene Expression
Chromatin Assembly and Disassembly
Cell Nucleus Active Transport
Telomere
Sirolimus
Guanosine Triphosphate
Nitrogen
Transcription
Genes
Switches

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

Cite this

Genetic evidence that Ras-like GTPases, Gtr1p, and Gtr2p, are involved in epigenetic control of gene expression in Saccharomyces cerevisiae. / Sekiguchi, Takeshi; Hayashi, Naoyuki; Wang, Yonggang; Kobayashi, Hideki.

In: Biochemical and Biophysical Research Communications, Vol. 368, No. 3, 11.04.2008, p. 748-754.

Research output: Contribution to journalArticle

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