GEO DataSets

(Submitter supplied) Centromeres are essential to ensure proper chromosome segregation in eukaryotes. Their definition relies on the presence of a centromere-specific H3 histone variant CenH3, known as CENP-A in mammals. Its overexpression in aggressive cancers raises questions concerning its effect on chromatin dynamics and contribution to tumorigenesis. We find that CenH3 overexpression in human cells leads to ectopic enrichment at sites of active histone turnover. more...

Organism:

Homo sapiens

Type:

Genome binding/occupancy profiling by high throughput sequencing; Expression profiling by high throughput sequencing

Platform:

GPL11154

16 Samples

Download data: BED, TXT, WIG

(Submitter supplied) The centromere specific histone H3 variant CENP-A/CENH3 specifies where the kinetochore is formed in most eukaryotes. Despite tight regulation of CENP-A levels in normal cells, overexpression of CENP-A is a feature shared by various types of solid tumors and results in its mislocalization to non-centromeric DNA. How CENP-A is assembled ectopically and the consequences of this mislocalization remain topics of high interest. more...

Organism:

Homo sapiens

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL18573

40 Samples

Download data: BED, BW

(Submitter supplied) Mislocalization of CENP-A to non-centromeric regions contributes to chromosomal instability (CIN). Here, we defined a role for the histone H3/H4 chaperone CHAF1B in preventing mislocalization of CENP-A and CIN.

Organism:

Homo sapiens

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL20795

4 Samples

Download data: BW

(Submitter supplied) Histone chaperones prevent promiscuous histone interactions before chromatin assembly. They guarantee faithful deposition of canonical histones and functionally specialized histone variants into chromatin in a spatial- and temporally-restricted manner. Here, we identify the binding partners of the primate-specific and H3.3-related histone variant H3.Y using several quantitative mass spectrometry approaches, and biochemical and cell biological assays. more...

Organism:

Homo sapiens

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL11154

13 Samples

Download data: BED, BW

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Saccharomyces cerevisiae

Type:

Expression profiling by high throughput sequencing; Genome binding/occupancy profiling by high throughput sequencing

Platforms:

GPL19756 GPL17342

27 Samples

Download data

(Submitter supplied) Correct localization of the centromeric histone variant CenH3/CENP-A/Cse4 is an important part of faithful chromosome segregation. Mislocalization of CenH3 could lead to ectopic centromere formation and missegregation, and could affect DNA replication and transcription. CENP-A is often overexpressed and mislocalized in cancer genomes, but the underlying mechanisms are not understood. One major regulator of Cse4 deposition is Psh1, an E3 ubiquitin ligase that controls levels of Cse4 to prevent deposition into noncentromeric regions. more...

Organism:

Saccharomyces cerevisiae

Type:

Expression profiling by high throughput sequencing

Platform:

GPL17342

8 Samples

Download data: TXT

(Submitter supplied) Correct localization of the centromeric histone variant CenH3/CENP-A/Cse4 is an important part of faithful chromosome segregation. Mislocalization of CenH3 could lead to ectopic centromere formation and missegregation, and could affect DNA replication and transcription. CENP-A is often overexpressed and mislocalized in cancer genomes, but the underlying mechanisms are not understood. One major regulator of Cse4 deposition is Psh1, an E3 ubiquitin ligase that controls levels of Cse4 to prevent deposition into noncentromeric regions. more...

Organism:

Saccharomyces cerevisiae

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL19756

19 Samples

Download data: BW

(Submitter supplied) Plant and animal centromeres comprise megabases of highly repeated satellite sequences, yet centromere function can be specified epigenetically on single-copy DNA by the presence of nucleosomes containing a centromere-specific variant of histone H3 (cenH3). We determined the positions of cenH3 nucleosomes in rice (Oryza sativa), which has centromeres composed of both the 155-bp CentO repeat and single-copy non-CentO sequences. more...

Organism:

Oryza sativa

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platforms:

GPL9316 GPL13160

6 Samples

Download data: WIG

(Submitter supplied) The histone variant H3.3 is incorporated in a replication-independent manner at heterochromatic regions by the ATRX-DAXX histone chaperone complex. Here, we present a high-resolution x-ray crystal structure of an interaction surface between ATRX and DAXX. We used single amino acid substitutions in DAXX that abrogate formation of the complex to explore ATRX-dependent and -independent functions of DAXX. more...

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL17021

10 Samples

Download data: TXT

(Submitter supplied) Histone chaperones modulate the stability of histones beginning from histone synthesis, through incorporation into DNA, and during recycling during transcription and replication. Following histone removal from DNA, chaperones regulate histone storage and degradation. Here we characterize UBR7 as a histone H3.1 chaperone that modulates the supply of pre-existing post-nucleosomal histone complexes. UBR7 is a largely nuclear soluble protein. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing; Genome binding/occupancy profiling by high throughput sequencing

Platforms:

GPL18573 GPL24676

18 Samples

Download data: BED, BROADPEAK, BW, TXT

(Submitter supplied) The centromere, as an essential element to control chromosome segregation, is epigenetically determined by CENH3-containing nucleosomes as a functional marker, therefore the accurate deposition of CENH3 is crucial to chromosome transmission. We characterized the deposition of CENH3 in maize by over-expression and mutational analysis. Our results revealed that over-expressing CENH3 in callus is lethal while over-expressing GFP-CENH3 and CENH3-YFP in callus and plants is not and can be partly deposited normally. more...

Organism:

Zea mays

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL15463

6 Samples

Download data: COV

(Submitter supplied) Purpose: Pancreatic neuroendocrine tumors (PanNETs) have considerable malignant potential. Frequent somatic mutations and loss of DAXX protein expression have been frequently found in PanNETs. DAXX is known as a transcriptional repressor, however, molecular functions underlying loss of DAXX remain unclear in PanNETs. Experimental Design: We evaluated DAXX-knockdown (KD) and -knockout (KO) PanNET cells were analyzed for in vitro and vivo. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

4 Samples

Download data: CEL

(Submitter supplied) Comparison of histone variant CENP-A in different cell lines vs. DHS profiles from same cell lines. Mock IPs included.

Organism:

Homo sapiens

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL10999

10 Samples

Download data: CSV

(Submitter supplied) Objective: Daxx is a protein with multiple functions and is essential for embryonic development. Daxx knockout embryos fail to develop properly and exhibit lethal phenotype around E6.5. One of the important functions is as a histone chaperone for the histone H3 variant, H3.3. Daxx interacts with Atrx to form a protein complex that deposits H3.3 into heterochromatic regions of the genome, including centromeres, telomeres and repeat loci. more...

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL21103

47 Samples

Download data: TSV

(Submitter supplied) Bladder cancer (BCa) is one of the most common malignancy of the urinary tract. In order to improve the diagnosis, prevention and treatment of BCa, the details of molecular mechanisms underlying the tumorigenesis and development needs to be clarified. Results provide insight into molecular mechanisms underlying the mRNA and miRNA interactions in BCa. 3 human bladder cancer tissues and 3 normal bladder tissues were analyzed using microarray. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL17586

6 Samples

Download data: CEL

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing; Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL19057

45 Samples

Download data: BW, NARROWPEAK

(Submitter supplied) Chromatin integrates extracellular signals to regulate gene expression and, therefore, tightly controls development. Mutations in histone genes, including H3.3 and H4, were recently identified in children with developmental disorders characterized by intellectual disability and dysmorphic facial features1–7. However, the mechanistic and functional roles of these de novo, heterozygous germline mutations remain largely unknown. more...

Organism:

Mus musculus

Type:

Genome binding/occupancy profiling by high throughput sequencing

Platform:

GPL19057

36 Samples

Download data: BW, NARROWPEAK

(Submitter supplied) Chromatin integrates extracellular signals to regulate gene expression and, therefore, tightly controls development. Mutations in histone genes, including H3.3 and H4, were recently identified in children with developmental disorders characterized by intellectual disability and dysmorphic facial features1–7. However, the mechanistic and functional roles of these de novo, heterozygous germline mutations remain largely unknown. more...

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL19057

9 Samples

Download data: CSV