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Drosophila melanogaster

ABSTRACT: Total mRNA and piRNA sequences of delta-mbt-OSCs

PROVIDER: PRJDB4466 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR050988_1.fastq.gz	Fastqsanger.gz
	DRR050988_2.fastq.gz	Fastqsanger.gz
	DRR050989_1.fastq.gz	Fastqsanger.gz
	DRR050989_2.fastq.gz	Fastqsanger.gz
	DRR050990.fastq.gz	Fastqsanger.gz

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Transcriptome of yw fly, L(3)mbt mutant fly and Lint-O mutant fly were performed in triplicate in Drosophila melanogaster

Project description:L(3)mbt regulates the transcription of germ-specific genes in somatic cells but the detailed mechanism remains unclear. We performed ChIP-seq of L(3)mbt and a newly identified interactor in OSCs to elucidate the genome-wide localization. Then we performed RNA-seq of OSCs before and after RNAi treatment of L(3)mbt and its interactors and performed differential expression analysis.

2022-08-14 | GSE205541 | GEO

Genome-wide localization profile (ChIP-seq) and differential expression profile upon RNAi treatment (RNA-seq) of L(3)mbt and its interactor in ovarian somatic cells[OSCs] in Drosophila

Project description:L(3)mbt regulate the transcription of germ-specific genes in somatic cells but the detailed mechanism remains unclear. We performed ChIP-seq of L(3)mbt and a newly identified interactor in OSCs to elucidate the genome-wide localization. Then we performed RNA-seq of OSCs before and after RNAi treatment of L(3)mbt and its interactors and performed differential expression analysis.

2022-08-15 | GSE181802 | GEO

Genome-wide localization profile (ChIP-seq) and differential expression profile upon RNAi treatment (RNA-seq) of L(3)mbt and its interactors in ovarian somatic cells[OSCs] in Drosophila

2024-08-01 | GSE162999 | GEO

Expression profile and RNA Polymerase II occupancy of transposable elements among knock down of the piRNA pathway components in OSCs

Project description:The Piwi–piRNA complex (Piwi–piRISC) in Drosophila ovarian somatic cells represses transposons transcriptionally to maintain genome integrity; however, the underlying mechanisms remain obscure. We performed mRNA-seq analysis from OSCs transfected with siRNAs against CG3893, the known piRNA pathway genes, Piwi, Maelstrom, HP1a and Armitage, and the control (EGFP), and PolII ChIP-seqanalysis from OSCs transfected with siRNAs against CG3893, Piwi, Mael and the control (EGFP). This result indicates that CG3893 is a novel factor for primary piRNA pathway in OSCs.

2013-08-01 | GSE47006 | GEO

shotgun LC/MS/MS of L(3)mbt-IP samples using OSCs

Project description:L(3)mbt regulate the transcription of germ-specific genes in somatic cells but the detailed mechanism remains unclear. We performed shotgun LC/MS/MS of L(3)mbt-IP samples and identified a new interactor in OSCs.

2022-08-15 | PXD026945 | Pride

Krimper enforces an antisense bias on piRNA pools by binding AGO3 in the Drosophila germline

Project description:Piwi-interacting RNAs (piRNAs) suppress transposon activity in animal germ cells. In the Drosophila ovary, primary Aubergine (Aub)-bound antisense piRNAs initiate the ping-pong cycle to produce secondary AGO3-bound sense piRNAs. This increases the number of secondary Aub-bound antisense piRNAs that can act to destroy transposon mRNAs. Here we show that Krimper (Krimp), a Tudor-domain protein, directly interacts with piRNA-free AGO3 to promote symmetrical dimethylarginine (sDMA) modification, ensuring sense piRNA-loading onto sDMA-modified AGO3. In aub mutant ovaries, AGO3 associates with ping-pong signature piRNAs, suggesting AGO3’s compatibility with primary piRNA loading. Krimp sequesters ectopically expressed AGO3 within Krimp bodies in cultured ovarian somatic cells (OSCs), in which only the primary piRNA pathway operates. Upon krimp-RNAi in OSCs, AGO3 loads with piRNAs, further showing the capacity of AGO3 for primary piRNA loading. We propose that Krimp enforces an antisense bias on piRNA pools by binding AGO3 and blocking its access to primary piRNAs. In order to investigate function of Krimp in piRNA pathway, sequencing of Piwi subfamily protein associated small RNAs was performed using adult Drosophila ovaries and Ovarian Somatic Cells (OSCs) depleted for Krimp or Aub.

2015-05-28 | E-GEOD-69293 | biostudies-arrayexpress

Expression profile and RNA Polymerase II occupancy of transposable elements among knock down of the piRNA pathway components in OSCs

Project description:The PiwiM-bM-^@M-^SpiRNA complex (PiwiM-bM-^@M-^SpiRISC) in Drosophila ovarian somatic cells represses transposons transcriptionally to maintain genome integrity; however, the underlying mechanisms remain obscure. We performed mRNA-seq analysis from OSCs transfected with siRNAs against CG3893, the known piRNA pathway genes, Piwi, Maelstrom, HP1a and Armitage, and the control (EGFP), and PolII ChIP-seqanalysis from OSCs transfected with siRNAs against CG3893, Piwi, Mael and the control (EGFP). This result indicates that CG3893 is a novel factor for primary piRNA pathway in OSCs. RNA levels in wild-type (EGFP control knock-down) ovarian somatic cells (OSC) and RNAi knock-downs of Piwi, Armi, Mael, CG3893, and HP1a. RNA Polymerase II occupancy in wild-type (EGFP control knock-down) ovarian somatic cells (OSC) and RNAi knock-downs of Piwi, Mael, and CG3893.

2013-08-01 | E-GEOD-47006 | biostudies-arrayexpress

Krimper enforces an antisense bias on piRNA pools by binding AGO3 in the Drosophila germline

2015-05-28 | GSE69293 | GEO

Somatic Primary piRNA Biogenesis Driven by Cis-Acting RNA Elements and Trans- Acting Yb

Project description:Primary piRNAs in Drosophila ovarian somatic cells arise from piRNA cluster transcripts and the 3′ UTRs of a subset of mRNAs, including Traffic jam (Tj) mRNA. However, it is unclear how these RNAs are determined as primary piRNA sources. Here, we identify a cis-acting 100-nt fragment in the Tj 3′ UTR that is sufficient for producing artificial piRNAs from unintegrated DNA. These artificial piRNAs were effective in endogenous gene transcriptional silencing. Yb, a core component of primary piRNA biogenesis center Yb bodies, directly bound the Tj-cis-element. Disruption of this interaction markedly reduced piRNA production. Thus, Yb is the trans-acting partner of the Tj-cis-element. Yb-CLIP revealed that Yb-binding correlated with somatic piRNA production but Tj-cis-element downstream sequences produced few artificial piRNAs. Thus, Yb determines primary piRNA sources by two modes of action; primary binding to cis-elements to specify substrates, and secondary binding to downstream regions to increase diversity in piRNA populations. HITS-CLIP of Yb in OSCs (Ovarian Somatic Cells) depleted for tj cis-element, and small RNA sequencing of Piwi-piRNAs in OSCs depleted for tj cis-element.

2015-06-05 | E-GEOD-69625 | biostudies-arrayexpress

piRNA libraries from Drosophila melanogaster ovaries

Project description:Drosophila Piwi-family proteins have been implicated in transposon control. Here, we examine piwi-interacting RNAs (piRNAs) associated with each Drosophila Piwi protein and find that Piwi and Aubergine bind RNAs that are predominantly antisense to transposons, whereas Ago3 complexes contain predominantly sense piRNAs. As in mammals, the majority of Drosophila piRNAs are derived from discrete genomic loci. These loci comprise mainly defective transposon sequences, and some have previously been identified as master regulators of transposon activity. Our data suggest that heterochromatic piRNA loci interact with potentially active, euchromatic transposons to form an adaptive system for transposon control. Complementary relationships between sense and antisense piRNA populations suggest an amplification loop wherein each piRNA-directed cleavage event generates the 5’ end of a new piRNA. Thus, sense piRNAs, formed following cleavage of transposon mRNAs, may enhance production of antisense piRNAs, complementary to active elements, by directing cleavage of transcripts from master control loci. Keywords: small RNA libraries from Drosophila ovaries

2007-03-08 | GSE6734 | GEO

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