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Drosophila melanogaster

ABSTRACT: Su(Hw) and Shep RIP-seq in Kc and BG3 cell lines

PROVIDER: PRJNA241258 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR1191710.fastq.gz	Fastqsanger.gz
	SRR1191720.fastq.gz	Fastqsanger.gz
	SRR1191701.fastq.gz	Fastqsanger.gz
	SRR1191711.fastq.gz	Fastqsanger.gz
	SRR1191721.fastq.gz	Fastqsanger.gz

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Su(Hw) and Shep RIP-seq in Kc and BG3 cell lines

Project description:Su(Hw) and Shep RIP-seq in Kc and BG3 cell lines

2014-07-29 | GSE55894 | GEO

Su(Hw) and Shep RIP-seq in Kc and BG3 cell lines

Project description:Su(Hw) and Shep RIP-seq in Kc and BG3 cell lines RIP-seq with multiple antibodies to two proteins in two Drosophila cell lines, at least 2 replicates for each IP and input

2014-07-29 | E-GEOD-55894 | biostudies-arrayexpress

Genome-wide binding profiles of Drosophila melanogaster insulator proteins in Kc and Mbn2 cells

Project description:ChIP-chip experiments with NimbleGen whole-genome tiling arrays to compare Su(Hw), dCTCF, BEAF, and CP190 localization on DNA in Kc and Mbn2 cells revealed that BEAF is a third subclass of CP190-containing insulators. The DNA binding proteins, Su(Hw), dCTCF, and BEAF show unique distribution patterns with respect to the location and expression level of genes, suggesting diverse roles for these three subclasses of insulators in genome organization. Notably, cell line specific localization sites for all three DNA binding proteins as well as CP190 indicate multiple levels at which insulators can be regulated to affect gene expression. Three replicates of Su(Hw), dCTCF, and CP190 ChIP-chip experiments in both Kc and Mbn2 cells as well as two replicates of BEAF ChIP-chip experiments in both Kc and Mbn2 cells were compared.

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Project description:Here we compare the distribution of insulator proteins during interphase and mitosis. We performed ChIP-seq analysis on purified populations of interphase and mitotic Kc cells, using antibodies against CP190, dCTCF, BEAF, and Su(Hw).

2013-01-21 | GSE32584 | GEO

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Project description:Chromatin insulators organize the genome into distinct transcriptional domains and contribute to cell type-specific chromatin organization. However, factors regulating tissue-specific insulator function have not yet been discovered. Here we identify the RNA recognition motif-containing protein, Shep, as a direct interactor of two individual components of the gypsy insulator complex in Drosophila. Mutation of shep improves gypsy-dependent enhancer blocking, indicating a role as a negative regulator of insulator activity. Unlike ubiquitously expressed core gypsy insulator proteins, Shep is highly expressed in the central nervous system (CNS) with lower expression in other tissues. We developed a novel, quantitative tissue-specific barrier assay to demonstrate that Shep functions as a negative regulator of insulator activity in the CNS but not in muscle tissue. Additionally, mutation of shep alters insulator complex nuclear localization in the CNS but not other tissues. Consistent with negative regulatory activity, ChIP-seq analysis of Shep in a CNS-derived cell line indicates substantial genome-wide colocalization with a single gypsy insulator component but limited overlap with intact insulator complexes. Taken together, these data reveal a novel, tissue-specific mode of regulation of a chromatin insulator. ChIP-seq of Shep, Su(Hw), and Mod(mdg4)2.2 in Drosophila BG3 cells along with alternate antibodies

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Drosophila melanogaster

Project description:Genome-wide profiling of Su(H) in Drosophila melanogaster BG3 cell lines

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Gene expression analyses from 3-day testes of D. melanogaster

Project description:Suppressor of Hairy-wing [Su(Hw)] is a globally expressed twelve-zinc finger transcription factor in Drosophila. Su(Hw) is well-known for its role in establishing the gypsy insulator within the gypsy retrotransposon. A direct role of Su(Hw) in gene activation and repression was uncovered through the study in the Drosophila oogenesis, revealing that Su(Hw)-dependent repression of neuronal genes is essential for egg production. Motivated from the spatially restricted expression of Su(Hw) in the testis, we investigated the role of Su(Hw) in spermatogenesis. We discovered that Su(Hw) is required for sperm development and male fertility. Data presented here examined the transcriptional role of Su(Hw) in the Drosophila testis. These studies identified ~400 genes with altered expression in the absence of Su(Hw). Coupled with whole-genome Su(Hw) binding profiles, we identified 145 direct targets of Su(Hw) regulation, of which ~80% show increased transcription upon Su(Hw) loss. Upregulated Su(Hw) targets are enriched for neuronal expression, emphasizing that Su(Hw) represents a functional homolog of mammalian REST that represses neuronal gene expression in non-neuronal tissues.

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