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SRP058819
Drosophila melanogaster
4 Downloadable Samples
Illumina HiSeq 2000
Description
Nucleosome structure and positioning play pivotal roles in gene regulation, DNA repair and other essential processes in eukaryotic cells. Nucleosomal DNA is thought to be uniformly inaccessible to DNA binding and processing factors, such as MNase. Here, we show, however, that nucleosome accessibility and sensitivity to MNase varies. Digestion of Drosophila chromatin with two distinct concentrations of MNase revealed two types of nucleosomes: sensitive and resistant. MNase-resistant nucleosome arrays are less accessible to low concentrations of MNase, whereas MNase-sensitive arrays are degraded by high concentrations. MNase-resistant nucleosomes assemble on sequences depleted of A/T and enriched in G/C containing dinucleotides. In contrast, MNase-sensitive nucleosomes form on A/T rich sequences represented by transcription start and termination sites, enhancers and DNase hypersensitive sites. Lowering of cell growth temperature to ~10°C stabilizes MNase-sensitive nucleosomes suggesting that variations in sensitivity to MNase are related to either thermal fluctuations in chromatin fiber or the activity of enzymatic machinery. In the vicinity of active genes and DNase hypersensitive sites nucleosomes are organized into synchronous, periodic arrays. These patterns are likely to be caused by “phasing” nucleosomes off a potential barrier formed by DNA-bound factors and we provide an extensive biophysical framework to explain this effect. Overall design: RNA-seq S2 cells Drosophila melanogaster
Publication Title
Genome-wide profiling of nucleosome sensitivity and chromatin accessibility in Drosophila melanogaster.
Sample Metadata Fields
Specimen part, Subject
View Samples- Mus musculus
- 10 Downloadable Samples
Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
The oocytes of many species, both invertebrate and vertebrate, contain a large collection of localized determinants in the form of proteins and translationally inactive maternal mRNAs. However, it is unknown whether mouse oocytes contain localized MmRNA determinants and what mechanisms might be responsible for their control. We collected intact MII oocytes, enucleated MII oocyte cytoplasts (with the spindle removed), and spindle-chromosome complexes which had been microsurgically removed. RNA was extracted, amplified, labeled, and applied to microarrays to determine if any MmRNA determinants were localized to the SCC.
Publication Title
Association of maternal mRNA and phosphorylated EIF4EBP1 variants with the spindle in mouse oocytes: localized translational control supporting female meiosis in mammals.
Sample Metadata Fields
Sex, Specimen part, Disease
View Samples- Mus musculus
- 6 Downloadable Samples
- Illumina HiSeq 2500
Description
Analysis of gene-probe expression data (FPKM) for mouse skin using single-end read RNA-seq Overall design: RNA was collected and analyzed for 2 biological replicates each from 3 developmental stages (E18.5, P3, 10 weeks)
Publication Title
RNA-seq studies reveal new insights into p63 and the transcriptomic landscape of the mouse skin.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 4 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
We developed a Tet-inducible system to express deltaNp63alpha isoform under the control of keratin 5 promoter. Transgenic mice, which were Bigenic (BG) developed a severe skin phenotype with abnormal keratinocyte differentiation and defects in hair follicle development and cycling. Skin samples from transgenic animals and wild type animals were analyzed for global transcriptome changes.
Publication Title
Abnormal hair follicle development and altered cell fate of follicular keratinocytes in transgenic mice expressing DeltaNp63alpha.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 9 Downloadable Samples
Description
To define target genes of the intestine-restricted transcription factor (TF) CDX2 in intestinal stem cells, we performed chromatin immunoprecipitation coupled with high-throughput sequencing (ChIP-Seq). We used RNA-sequencing to profile gene expression changes during cell differentiation from mouse intestinal stem cells to mature villus cells, as well as genes perturbed in intestinal stem cells upon loss of Cdx2. We find thousands of genes that change in expression during cell differentiation, including known stem cell and mature markers. Upon loss of Cdx2, hundreds of genes are up and down-regulated in intestinal stem cells, some of which are also bound by CDX2 nearby and constitute candidate direct target genes. Overall design: CDX2 ChIP-Seq analysis of isolated mouse intestinal stem cells. RNA seq analysis of control mouse villus cells, control intestinal stem cells and Cdx2-deleted intestinal stem cells.
Publication Title
Distinct Processes and Transcriptional Targets Underlie CDX2 Requirements in Intestinal Stem Cells and Differentiated Villus Cells.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 12 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
This SuperSeries is composed of the SubSeries listed below.
Publication Title
Intestinal master transcription factor CDX2 controls chromatin access for partner transcription factor binding.
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 13 Downloadable Samples
- Illumina HiSeq 2500
Description
Analysis of gene expression changes during mouse salivary gland development using RNA-Seq Overall design: RNA was collected and analyzed for at least two biological replicates each from six developmental timepoints (E14.5, E16.5, E18.5, P5, 4 weeks, 12 weeks)
Publication Title
RNA-seq based transcriptomic map reveals new insights into mouse salivary gland development and maturation.
Sample Metadata Fields
Age, Specimen part, Cell line, Subject
View Samples- Mus musculus
- 12 Downloadable Samples
Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
We established whether partner transcription factor binding, chromatin structure, or gene expression is compromised upon loss of partner factors cdx2 or hnf4a in mouse intestinal villi
Publication Title
Intestinal master transcription factor CDX2 controls chromatin access for partner transcription factor binding.
Sample Metadata Fields
Specimen part
View Samples- Arabidopsis thaliana
- 6 Downloadable Samples
- Affymetrix Arabidopsis ATH1 Genome Array (ath1121501)
Description
Changes ins organellar gene expression trigger retrograde signalling. Prolyl-tRNA synthetase (PRORS1) is located in chloroplasts and mitochondria. Thus, prors1-2 mutants are impaired in chloroplast and mitochondrial gene expression.
Publication Title
Identification of target genes and transcription factors implicated in translation-dependent retrograde signaling in Arabidopsis.
Sample Metadata Fields
Age, Specimen part
View Samples- Mus musculus
- 4 Downloadable Samples
- NextSeq500
Description
To determine whether the intestine-restricted transcription factor (TF) CDX2 functionally interacts with the endoderm-wide TF HNF4A, we crossed tissue-specific conditional Cdx2 and Hnf4a knockout mice to generate compound mutant mice. We used RNA-sequencing to profile gene expression changes in compound mutant mice compared to control mice. The compound mutant mice had a significantly worse phenotype than either single mutant, and gene expression was significantly perturbed in compound mutants compared to control mice. Overall design: Total RNA isolated from control and compound mutant (Hnf4a-del;Cdx2-del) jejunal mouse intestinal epithelium was prepared for sequencing using the TruSeq RNA Sample Preparation Kit (Illumina) according to the manufacturer''s instructions. 75-base-pair single-end reads were sequenced on an Illumina NextSeq 500 instrument. The data include 2 independent biological replicates per genotype.
Publication Title
Transcription factors GATA4 and HNF4A control distinct aspects of intestinal homeostasis in conjunction with transcription factor CDX2.
Sample Metadata Fields
No sample metadata fields
View Samples