ModENCODE RNA-Seq of Drosophila cell lines Kc167, CME_W1_Cl.8+, S2-DRSC and ML-DmBG3-c2
ABSTRACT: Deep Sequencing of mRNA from the Drosophila melanogaster cell lines Kc167, CME_W1_Cl.8+, S2-DRSC and ML-DmBG3-c2. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf Analysis of poly(A)+ RNA from 2 biological replicates of Kc167, CME_W1_Cl.8+, S2-DRSC and ML-DmBG3-c2 cell lines.
Drosophila melanogaster cell lines are important resources for cell biologists. Here, we catalog the expression of exons, genes, and unannotated transcriptional signals for 25 lines. Unannotated transcription is substantial (typically 19% of euchromatic signal). Conservatively, we identify 1405 novel transcribed regions; 684 of these appear to be new exons of neighboring, often distant, genes. Sixty-four percent of genes are expressed detectably in at least one line, but only 21% are detected in ...[more]
Project description:Homologous vertebrate tissues express a highly conserved set of transcribed genes; paradoxically, expression of tRNAs that are required to translate mRNAs into proteins have been reported to be divergent. To resolve this paradox, we mapped the genome-wide occupancy of pol III in primary tissues isolated from six mammals. We confirmed that the specific tRNA genes bound by pol III, as well as the extent and stability of binding, can vary substantially among mammalian tissues, and we discovered that this divergence is far greater between species. We combined pol III occupancy from genomically discrete tRNA loci into collective binding into isoacceptor classes and then into amino acid-based isotype classes, and at each step we found increasing conservation. At the level of amino acid isotypes, pol III binding is almost invariant among all the tissues and species profiled. Thus, the basal transcriptional machinery is constrained collectively in its synthesis of functional tRNA isotypes, despite rapid divergence of polymerase binding to specific tRNA genes. Part of experiment series: RNA-Seq E-MTAB-424, ChIP-Seq E-MTAB-958
Project description:High-throughput gene expression profiling has become an important tool for investigating transcriptional activity in a variety of biological samples. To date, the vast majority of these experiments have focused on specific biological processes and perturbations. Here, we have generated and analyzed gene expression from a set of samples spanning a broad range of biological conditions. Specifically, we profiled gene expression from 91 human and mouse samples across a diverse array of tissues, organs, and cell lines. Because these samples predominantly come from the normal physiological state in the human and mouse, this dataset represents a preliminary, but substantial, description of the normal mammalian transcriptome. We have used this dataset to illustrate methods of mining these data, and to reveal insights into molecular and physiological gene function, mechanisms of transcriptional regulation, disease etiology, and comparative genomics. Finally, to allow the scientific community to use this resource, we have built a free and publicly accessible website (http://expression.gnf.org) that integrates data visualization and curation of current gene annotations. The terms of the Novartis data release policy prevent us from redistributing .cel files for this experiment, therefore there is no raw data, we hope to be able to release this in future.
Project description:Exponentially growing Sulfolobus acidocaldarius were treated with NaAc to generate replication runout and arrest in G2 phase. The cells were then resuspended in fresh acetate-free media which generates a synchronous population. Samples for investigation of gene expression change were taken during the synchronised populations progress through the cell cycle.
Project description:Posttranslational modification of proteins by N-linked glycosylation is crucial for many life processes. However, the exact contribution of N-glycosylation to mammalian female reproduction remains largely undefined. Here, DPAGT1, the enzyme that catalyzes the first step of protein N-glycosyation, is identified to be indispensable for oocyte development in mice. A recessive missense mutation (c. 497A>G; p. Asp166Gly) of Dpagt1 causes female subfertility without grossly affecting other functions. Mutant females ovulate fewer eggs owing to defects of follicular development beyond the late secondary stage. Oocytes ovulated by mutants carry a thin and fragile zona pellucida, and display poor developmental competence after fertilization in vitro. Moreover, completion of the first meiosis is accelerated in mutant oocytes, which is coincident with the elevation of aneuploidy. Mechanistically, transcriptomic analysis reveals the downregulation of a number of transcripts essential for oocyte meiotic progression and preimplantation development (e.g., Pttgt1, Esco2, Orc6, and Npm2) in mutant oocytes, which could account for the defects observed. Furthermore, conditional knockout (CKO) of Dpagt1 in oocytes recapitulates the phenotypes observed in Dpagt1 mutant females, and causes complete infertility. Taken together, these data indicate that protein N-glycosylation in oocytes is essential for female fertility in mammals by specific control of oocyte development.
Project description:Roswell Park Human 19K Array CGH<br><br>the format of the data is:<br> <br>Reporter Identifier<br>Band<br>Count - number of replicate spots the data represents (some spots are excluded in image analysis, usually because they are too dim to be reliable)<br>chr - Chromosome<br>Start - Start location in base pairs<br>Stop - Stop Location in Base pairs<br>Center - Center in base pairs<br>g_loc - graphing location this is the location of the center in base pairs if the chromosomes were laid end to end<br>Log2 ratio - log2 ratio (test/control)<br>Ratio - linear version of the ratio above <br>A - Measure of brightness A=(log2 cy3 + log2 cy5)/2 <br>Flag - Used to color code spots<br> 3 - red probably mismapped<br> 4 - green potentially polymorphic<br> 5 - light blue Shows a high degree of duplication with other area in the genome (see UCSC genome browser) <br>reference - Reference for why the clone was flagged <br>Pub Med link - Pub Med ID for why clone was flagged
Project description:Normal cell type specific histone H3 lysine 9 dimethylation of miRNA genes. HMEC and HMF represent two distinct differentiated cell type present in mammary gland each with a distinct phenotype, a distinct epigenotype as well as distinct miRNA expression pattern. The aim of the study was to determine how epigenetic modifications including histone H3 lysine 9 dimethylation affect miRNA expression. Two cell types HMEC vs. HMF. Biological replicates: 3 pairs of HMEC-HMF of 3 distinct genotypes. Immunoprecipitation using anti-histone H3 dimethylated at lysine 9 (CS200587, Millipore).
Project description:Timecourse of gene expression changes in Drosophila SoxN homozygous mutant embryos compared with their heterozygous siblings, from stage 7 to 13 of embryonic development. Five time points: stage 7-8, stage 9, stage 10, stage 11 and stage 12-13. Four biological replicates per time point. Two conditions: SoxN homoxygous vs SoxN heterozygous mutant embryos.