Sir2 and Hst1 ChIP-Seq in Saccharomyces cerevisiae
Ontology highlight
ABSTRACT:
ORGANISM(S): Saccharomyces cerevisiae
PROVIDER: GSE84552 | GEO | 2020/05/01
REPOSITORIES: GEO
Similar Datasets
Project description:Chromatin Immunoprecipitation followed by microarray analysis to identify the location of Sir2 and Orc1 genomic enrichment.
2020-05-01 | GSE85574 | GEO
Project description:Sir2-family of NAD-dependent histone deacetylases are involved in gene transcription repression in yeast. The C. glabrata genes encoding members of this family are SIR2 (CAGL0K01463g), HST1 (CAGL0C05357g), HST2 (CAGL0L08668g), HST3 (CAGL0H08239g) and HST4 (CAGL0F05621g). SIR4 (CAGL0K11396g) encodes a factor that forms a functional complex with Sir2. In this experiment, the transcription profile of C. glabrata HST1 null, HST2 null, SIR2 null or SIR4 null strain individually comparing with that of wild type strain was determined. All strains were grown in YPD liquid medium in Log phase at 30 C. Keywords: transcriptional profiling by microarray
2007-01-04 | GSE6626 | GEO
Project description:Telomere chromatin structure is pivotal for maintaining genome stability by regulating the binding of telomere-associated proteins and inhibition of a DNA damage response. In yeast, the silent information regulator (Sir) proteins bind to terminal telomeric repeats and to subtelomeric X-elements resulting in histone deacetylation and transcriptional silencing. Herein, we show that sir2 mutant strains display a very specific loss of a nucleosome residing in the X-element. Most yeast telomeres contain an X-element and the nucleosome occupancy defect in sir2 mutants is remarkably consistent between different telomeres.
2022-08-09 | GSE195972 | GEO
Project description:Sir2 and Hst1 ChIP-Seq in Saccharomyces cerevisiae
| PRJNA330768 | ENA
Project description:Chromatin Immunoprecipitation followed by high throughput sequencing to identify the location of Orc1 and Kos3 genomic enrichment.
2022-07-14 | GSE182111 | GEO
Project description:Sir2 and the homologous proteins, Hst1, Hst2, Hst3, and Hst4 from Saccharomyces cerevisiae are NAD+-dependent histone deacetylases of the sirtuin protein family. Sir2 functions in transcriptional silencing at the silent mating-type loci, telomeres, and rDNA locus, but also promotes replicative lifespan. To gain a better understanding of the chromatin-regulatory roles carried out by Sir2 and the Hst proteins, we performed ChIP-sequencing analysis on all five sirtuins and Sum1, the DNA binding partner for Hst1. Sir2, Hst1, and Sum1 were abundantly, and functionally co-enriched at several major targets, including the telomeric repeats, where they were required for maintaining proper telomere repeat length. At tRNA target genes they were required for efficient cohesin and condensin deposition. Across the open reading frames of glycolytic and ribosomal protein genes, Sir2 and Hst1 functioned in NAD+-dependent transcriptional repression at the diauxic shift, directly linking Sir2 to glucose metabolism, which could have implications for longevity. Six factors and Input ChIP-seq samples were analyzed in Saccharomyces eerevisiae.
2013-05-10 | E-GEOD-41415 | biostudies-arrayexpress
Project description:Chromatin Immunoprecipitation followed by high throughput sequencing to identify the location of Orc1, Orc2 and Orc4 genomic enrichment.
2021-07-02 | GSE165127 | GEO
Project description:Sir2 is a highly conserved NAD+-dependent histone deacetylase that functions in heterochromatin formation and promotes replicative lifespan (RLS) in the budding yeast, Saccharomyces cerevisiae. Within the yeast rDNA locus, Sir2 is required for efficient cohesin recruitment and maintaining stability of the tandem array. In addition to the previously reported depletion of Sir2 in replicatively aged cells, we discovered that subunits of the Sir2 containing complexes, SIR and RENT, were depleted. Several other rDNA structural protein complexes also exhibited age-related depletion, most notably the cohesin complex. We hypothesized that mitotic chromosome instability (CIN) due to cohesin depletion could be a driver of replicative aging. ChIP assays of the residual cohesin (Mcd1-13xMyc) in moderately aged cells showed strong depletion from the rDNA and initial redistribution to the point centromeres, which was then lost in older cells. Despite the shift in cohesin distribution, sister chromatid cohesion was partially attenuated in aged cells and the frequency of chromosome loss was increased. This age-induced CIN was exacerbated in strains lacking Sir2 and its paralog, Hst1, but suppressed in strains that stabilize the rDNA array due to deletion of FOB1 or through caloric restriction (CR). Furthermore, ectopic expression of MCD1 from a doxycycline-inducible promoter was sufficient to suppress rDNA instability in aged cells and to extend RLS. Taken together we conclude that age-induced depletion of cohesin and multiple other nucleolar chromatin factors destabilize the rDNA locus, which then results in general CIN and aneuploidy that shortens RLS.
2019-03-12 | GSE117037 | GEO
Project description:Sir2 and the homologous proteins, Hst1, Hst2, Hst3, and Hst4 from Saccharomyces cerevisiae are NAD+-dependent histone deacetylases of the sirtuin protein family. Sir2 functions in transcriptional silencing at the silent mating-type loci, telomeres, and rDNA locus, but also promotes replicative lifespan. To gain a better understanding of the chromatin-regulatory roles carried out by Sir2 and the Hst proteins, we performed ChIP-sequencing analysis on all five sirtuins and Sum1, the DNA binding partner for Hst1. Sir2, Hst1, and Sum1 were abundantly, and functionally co-enriched at several major targets, including the telomeric repeats, where they were required for maintaining proper telomere repeat length. At tRNA target genes they were required for efficient cohesin and condensin deposition. Across the open reading frames of glycolytic and ribosomal protein genes, Sir2 and Hst1 functioned in NAD+-dependent transcriptional repression at the diauxic shift, directly linking Sir2 to glucose metabolism, which could have implications for longevity.
2013-05-10 | GSE41415 | GEO
Project description:All Rap1, Sir2, Sir3, Sir4, and mock immunoprecipitation experiments associated with Lieb et al. Nature Genetics, August 2001, Volume 28, Issue 4 Set of arrays organized by shared biological context, such as organism, tumors types, processes, etc. Keywords: Logical Set
2005-09-24 | GSE3360 | GEO