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Genome wide transcriptional profiling of BEAF-32 in wing imaginal tissues of wildtype and mutants [expresion array]

ABSTRACT: The mutants in BEAF-32 gene in Drosophila caused the Neoplastic growth. In order to understand the rold of BEAF-32 insulator function in regualtion of gene expression we used the imagial tissue as a model to assay the transcriptional changes. The Imagianl tissues were disected in the icecold PBS and Total RNA was prepared using RNaeasy ( qiagen ) kit. This is followed by cDNA synthesis using Oligo dT. Transcriptional changes assayed with two biological replicates and two experimental replicates Two biologial replicates and two experimental replicates were prepared in an independent experiments. Each cDNA samples were labeled with Cy3 due and hybridised and scaned as per manufactures instructions at Florida state university Nimblegen fecility.

ORGANISM(S): Drosophila melanogaster

SUBMITTER: Gurudatta Baraka Vishwanathan

PROVIDER: E-GEOD-36736 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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The BEAF insulator regulates genes involved in cell polarity and neoplastic growth.

Gurudatta B V BV Ramos Edward E Corces Victor G VG

Developmental biology 20120626 1

Boundary Element Associated Factor-32 (BEAF-32) is an insulator protein predominantly found near gene promoters and thought to play a role in gene expression. We find that mutations in BEAF-32 are lethal, show loss of epithelial morphology in imaginal discs and cause neoplastic growth defects. To investigate the molecular mechanisms underlying this phenotype, we carried out a genome-wide analysis of BEAF-32 localization in wing imaginal disc cells. Mutation of BEAF-32 results in miss-regulation ...[more]

PMID: 22743648

Similar Datasets

BEAF-32 insulator regulates gene expression of genes involved in cell polarity and neoplastic growth.

Project description:This SuperSeries is composed of the following subset Series: GSE36735: Distribution of Drosophila insulator protein BEAF-32 in Wing imaginal tissue (Wildtype) [ChIP-seq] GSE36736: Genome wide transcriptional profiling of BEAF-32 in wing imaginal tissues of wildtype and mutants [expresion array] Refer to individual Series

2012-07-05 | E-GEOD-36737 | biostudies-arrayexpress

Distribution of Drosophila insulator protein BEAF-32 in Wing imaginal tissue (Wildtype) [ChIP-seq]

Project description:Chromatin insulators are DNA protein complexes that mediate inter and intra chromosomal interactions. Boundary Element Associated Factor- 32 (BEAF-32) is an insulator protein predominantly found near gene promoters and thought to play a role in gene expression. We find that mutations in BEAF-32 are lethal, show loss of epithelial morphology in imaginal discs and cause neoplastic growth defects. To investigate the molecular mechanisms underlying this phenotype, we carried out a genome-wide analysis of BEAF-32 localization in wing imaginal disc cells. Mutation of BEAF-32 results in miss-regulation of 3850 genes by at least 1.5-fold, 647 of which are bound by this protein in wing imaginal cells. Up-regulated genes encode proteins such as Bazooka, a determinant of cell polarity; the Insulin receptor-1 and the p70-S6 kinase, involved in the insulin growth factor pathway that can activate various pathways involved in cell proliferation; and the Unpaired 3 ligand of the Janus kinase (JNK) pathway, and its target gene Socs35, which can also activate cell proliferation. The expression of genes involved in DNA homologous end repair and oxidative stress pathways is also increased in BEAF-32 mutants. Among the down-regulated genes are those encoding components of the Wingless pathway, which is required for cell differentiation, and amino acid metabolism. Miss-regulation of these genes explains the unregulated cell growth and neoplastic phenotypes observed in imaginal tissues of BEAF-32 mutants. Here we examine mapping the genomic binding sites and its distribution of BEAF-32, a Drosophila insulator proteins in wing imaginal tissue. We performed ChIP-seq analysis using BEAF-32B.

2012-07-05 | E-GEOD-36735 | biostudies-arrayexpress

Chromatin immunoprecipitation of BEAF-32A and BEAF-32B in Drosophila embryos

Project description:ChIP-chip analysis of BEAF binding sites in Drosophila embryos using three antibodies: one that recognize both BEAF-32A and BEAF-32B, one specific for BEAF-32A and one specific for BEAF-32B

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DamID profiling of proneural transcription factor binding in Drosophila melanogaster wing imaginal discs

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2014-01-01 | E-GEOD-53009 | biostudies-arrayexpress

Gene expression analysis of Kc cells from Drosophila melanogaster during ecdysone treatment and CP190 knockdown

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2011-10-13 | E-GEOD-30686 | biostudies-arrayexpress

Changes in gene expression in BAZ1B knockout and heterozygous targeted clones

Project description:Williams syndrome transcription factor (WSTF) is a multifaceted protein that is involved in several nuclear processes, including replication, transcription, and the DNA damage response. WSTF participates in a chromatin-remodeling complex with the ISWI ATPase, SNF2H, and is thought to contribute to the maintenance of heterochromatin, including at the human inactive X chromosome (Xi). WSTF is encoded by BAZ1B, and is one of twenty-eight genes that are hemizygously deleted in the genetic disorder Williams-Beuren syndrome (WBS). To explore the function of WSTF, we performed zinc finger nuclease-assisted targeting of the BAZ1B gene and isolated several independent knockout clones in human cells. Our results show that, while heterochromatin at the Xi is unaltered, new inappropriate areas of heterochromatin spontaneously form and resolve throughout the nucleus. In three independent mutants, the expression of a large number of genes were impacted, both up and down, by WSTF loss. In addition, we found that cells lacking WSTF responded appropriately to vitamin D treatment, a process we expected to be disrupted. Given the inappropriate appearance of regions of heterochromatin in BAZ1B knockout cells, it is evident that WSTF performs a critical role in maintaining chromatin and transcriptional states. Clearly, further exploration is necessary to fully understand the role of WSTF in maintenance of the epigenome and how WSTF haploinsufficiency contributes to the wide array of symptoms exhibited in WBS patients. Samples include three replicate miroarray hybridizations of the parental cells (hTERT-RPE1), three replicates from three independent knock-out clones (D5, F3 and M1), and one set of replicates for a heterozygous mutant clone (A6).

2014-05-21 | E-GEOD-47390 | biostudies-arrayexpress

Gene expression after single and dual insulator protein knock-downs in Drosophila Kc cells.

Project description:Transcriptional changes assayed with two bilogical replicates in wild type and RNAi mediated insulator knock-downs RNAi mediated insulator knock-downs cause changes in the H3K27me3 levels and spread of Topoisomerase II In order to understand the role of insulators in gene expression and regulation we used Drosophila Kc cells to knock-down single and multiple insulators in combination to assay for transcriptional changes. Two biologial replicates were prepared in independent experiments. Each cDNA samples were labeled with Cy3 dye and hybridized and scaned as per manufactures instructions at Florida State University Nimblegen facility.

2012-06-17 | E-GEOD-36944 | biostudies-arrayexpress

Genome wide transcriptional profiling of BEAF-32 in wing imaginal tissues of wildtype and mutants [expresion array]

Project description:The mutants in BEAF-32 gene in Drosophila caused the Neoplastic growth. In order to understand the rold of BEAF-32 insulator function in regualtion of gene expression we used the imagial tissue as a model to assay the transcriptional changes. The Imagianl tissues were disected in the icecold PBS and Total RNA was prepared using RNaeasy ( qiagen ) kit. This is followed by cDNA synthesis using Oligo dT. Transcriptional changes assayed with two biological replicates and two experimental replicates

2012-07-06 | GSE36736 | GEO

Conditional DamID and Transcriptome studies during sensory organ development in Drosophila

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2014-01-01 | E-GEOD-53011 | biostudies-arrayexpress

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