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Transcriptional networks controlling the cell cycle (RNA-seq)

ABSTRACT: Transcription profiling by RNA-seq of Drosophila S2 cells after knock down of strongest cell cycle regulators to map their genome-wide transcriptional targets (155 assays). RNA samples used for this experiment are a subset of the 200 samples used in Affymetrix microarray experiment E-MTAB-453. E-MTAB-1648, E-MTAB-1364 and E-MTAB-453 are all data from: Bonke M, et al. (2013) Transcriptional networks controlling the cell cycle. G3 (Bethesda) 3, 75-90, PMID: 23316440.

INSTRUMENT(S): Illumina Genome Analyzer IIx;Illumina HiSeq 2000

ORGANISM(S): Drosophila melanogaster

SUBMITTER: Anna Vaharautio

PROVIDER: E-MTAB-1364 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Transcriptional networks controlling the cell cycle.

Bonke Martin M Turunen Mikko M Sokolova Maria M Vähärautio Anna A Kivioja Teemu T Taipale Minna M Björklund Mikael M Taipale Jussi J

G3 (Bethesda, Md.) 20130101 1

In this work, we map the transcriptional targets of 107 previously identified Drosophila genes whose loss caused the strongest cell-cycle phenotypes in a genome-wide RNA interference screen and mine the resulting data computationally. Besides confirming existing knowledge, the analysis revealed several regulatory systems, among which were two highly-specific and interconnected feedback circuits, one between the ribosome and the proteasome that controls overall protein homeostasis, and the other ...[more]

PMID: 23316440

Similar Datasets

Transcriptional networks controlling the cell cycle

Project description:In this work, we use RNAi and subsequent RNA isolation and Affymetrix Expression array analysis to map the genome-wide transcriptional targets of 107 of the strongest cell cycle regulators. Drosophila S2 cells were used with RNAi target gene knockdown compared to control (GFP dsRNA). RMA normalized data re-annotated using a custom CDF is available on the FTP site for this experiment. E-MTAB-1648, E-MTAB-1364 and E-MTAB-453 are all data from: Bonke M, et al. (2013) Transcriptional networks controlling the cell cycle. G3 (Bethesda) 3, 75-90, PMID: 23316440.

2012-06-30 | E-MTAB-453 | biostudies-arrayexpress

ChIP-seq of E2f, Max, Myb and Myc in Drosophila melanogaster S2 cells for mapping their genome-wide binding sites

Project description:ChIP-seq for the strongest cell cycle regulator transcription factors in Drosophila Melanogaster S2 cells. These assays have been used to validate the direct transcriptional targets of the same transcription factors investigated in RNA-seq (E-MTAB-1364) and Affymetrix microarray experiments (E-MTAB-453). ChIP-seq assays have been done with tagged fusion proteins (for example, since we dont have functional E2f antibodies against endogenous E2f , we are transfecting v5-tagged-E2f-ORF to S2 cells and then use antibodies against v5 to detect the signal from E2f binding). If the ChIP-seq has been done with tagged fusion proteins (such as v5-tagged-E2f-ORF), the protein expression has been induced with CuSO4 treatment 48h prior to cell crosslinking & lysis. Our fusion protein constructs are driven by metallothionein promoter, which is induced by CuSO4. E-MTAB-1648, E-MTAB-1364 and E-MTAB-453 are all data from: Bonke M, et al. (2013) Transcriptional networks controlling the cell cycle. G3 (Bethesda) 3, 75-90, PMID: 23316440.

2013-08-01 | E-MTAB-1648 | biostudies-arrayexpress

PRL-1 selectively dephosphorylates TIMELESS

Project description:The timing of behavior under natural light-dark conditions is a function of circadian clocks and photic input pathways. Yet a mechanistic understanding of how these pathways collaborate in animals is lacking. Here we demonstrate in Drosophila that the Phosphatase of Regenerating Liver-1 (PRL-1) sets period length and behavioral phase gated by photic signals. PRL-1 knockdown in PDF clock neurons dramatically lengthens circadian period. PRL-1 mutants exhibit allele-specific interactions with the light- and clock-regulated gene timeless (tim). Moreover, we show that PRL-1 promotes TIM accumulation and dephosphorylation. Interestingly, the PRL-1 mutant period lengthening is suppressed in constant light and PRL-1 mutants display a delayed phase under short, but not long, photoperiod conditions. Thus, our studies reveal that PRL-1 dependent dephosphorylation of TIM is a core mechanism of the clock that sets period length and phase in darkness, enabling the behavioral adjustment to changing day-night cycles.

2020-11-11 | PXD020986 | Pride

Characterization of active piRNAs and piRNA machinery in WRR-1 cells deficient for the Hippo pathway (deficient for the warts tumor suppressor) and expressing activated RasV12 (RNA-seq)

Project description:We have found that oncogenic Ras combined with loss of the Hippo tumour-suppressor pathway reactivates a primary piRNA pathway in Drosophila somatic cells, coincident with oncogenic transformation. In these cells, Piwi becomes loaded with piRNAs derived from generative loci, which are normally restricted to either the germline or the somatic follicle cells. Negating the pathway leads to increases in the expression of a wide variety of transposons and also to altered expression of some protein coding genes. This correlates with a reduction in the proliferation of the transformed cells in culture, suggesting that at least in this context, the piRNA pathway may play a functional role in cancer. Small RNAs cloned from whole cells, Piwi-bound small RNAs and long RNA-Seq were performed in wts-RNAi;RasV12 cells to identify piRNAs and gene expression changes compared to RasV12 cells, somatic OSS cells, and germline UAS-wts-RNAi;UAS-RasV12 control ovaries. After knock-down of components of the piRNA machinery in WRR-1 cells ([piwi, zuchini, armitage, aubergine, argonaute3) and GFP and/or dsRED control knock-downs, small RNAs were cloned and gene expression (RNA-Seq) profiles were established.

2016-08-01 | E-GEOD-83843 | biostudies-arrayexpress

Characterization of active piRNAs and piRNA machinery in WRR-1 cells deficient for the Hippo pathway (deficient for the warts tumor suppressor) and expressing activated RasV12

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

2016-08-01 | E-GEOD-83877 | biostudies-arrayexpress

Characterization of active piRNAs and an piRNA machinery in WRR-1 cells deficient for the Hippo pathway (deficient for the warts tumor suppressor) and expressing activated RasV12 (small RNA)

Project description:We have found that oncogenic Ras combined with loss of the Hippo tumour-suppressor pathway reactivates a primary piRNA pathway in Drosophila somatic cells, coincident with oncogenic transformation. In these cells, Piwi becomes loaded with piRNAs derived from generative loci, which are normally restricted to either the germline or the somatic follicle cells. Negating the pathway leads to increases in the expression of a wide variety of transposons and also to altered expression of some protein coding genes. This correlates with a reduction in the proliferation of the transformed cells in culture, suggesting that at least in this context, the piRNA pathway may play a functional role in cancer. Small RNAs cloned from whole cells, piwi-bound small RNAs and long RNA-Seq were performed in wts-RNAi;RasV12 cells to identify piRNAs and gene expression and compared to RasV12 cells, somatic OSS cells, and germline UAS-wts-RNAi;UAS-RasV12 control ovaries. After knock-down of several components of the piRNA machinery in WRR-1 cells (piwi, zuchini, armitage, aubergine, argonaute3) and GFP and/or dsRED control knock-downs, small RNAs were cloned and gene expression profiles (RNA-Seq) were established.

2016-08-01 | E-GEOD-83871 | biostudies-arrayexpress

RNA-Seq of Drosophila melanogaster to count absolute number of molecules using unique molecular identifiers

Project description:Drosophila melanogaster mRNA sequencing using unique molecular identifiers (umis).

2011-11-21 | E-MTAB-816 | biostudies-arrayexpress

The hub protein Loqs connects the miRNA and endo-siRNA pathways in mosquitos

Project description:Aedes aegypti mosquitoes vector several arboviruses of global health significance, including dengue viruses and chikungunya virus. RNA interference (RNAi) plays an important role in antiviral immunity, gene regulation and protection from transposable elements. Double-stranded RNA binding proteins (dsRBPs) are important for efficient RNAi; in Drosophila functional specialization of the miRNA, endo-siRNA and exo-siRNA pathway is aided by the dsRBPs Loqs-PB, Loqs-PD and R2D2, respectively. However, this functional specialization has not been investigated in other dipterans. Characterization of the gene structure, expression pattern and interactions with other RNAi/miRNA components revealed that mosquito Loqs/R3D1 isoform -PA, but not -PB interacted readily with both AeAGO1 and AeAGO2. This interaction was mapped to a 32 a.a. region predicted to be structurally similar to the unique 22 a.a. tail of Drosophila Loqs-PD. No -PD isoforms could be detected in Ae. aegypti; analysis of other dipteran genomes demonstrated that this isoform is not conserved outside of Drosophila. Overexpression experiments indicated that Loqs/R3D1-PA participates in endo-siRNA, but not exo-siRNA based silencing. We conclude that the functional specialization of Loqs-PD in Drosophila is a recently derived trait, and that in other dipterans, including the medically important mosquitoes, Loqs/R3D1-A participates in both the miRNA and endo-siRNA based pathways. 12 samples, 3 replicates of each type of sample. The GFP sample is the reference sample

2015-04-08 | E-GEOD-65070 | biostudies-arrayexpress

The Exoribonuclease Nibbler Controls 3' End Processing of MicroRNAs in Drosophila

Project description:MicroRNAs (miRNAs) are endogenous noncoding small RNAs with important roles in many biological pathways; their generation and activity are under precise regulation. Emerging evidence suggests that miRNA pathways are precisely modulated with controls at the level of transcription, processing, and stability, with miRNA deregulation linked with diseases and neurodegenerative disorders. In the Drosophila miRNA biogenesis pathway, long primary miRNA transcripts undergo sequential cleavage to release the embedded miRNAs. Mature miRNAs are then loaded into Argonaute1 (Ago1) within the RNA-induced silencing complex (RISC). Intriguingly, we found that Drosophila miR-34 displays multiple isoforms that differ at the 3M-bM-^@M-2 end, suggesting a novel biogenesis mechanism involving 3M-bM-^@M-2 end processing. To define the cellular factors responsible, we performed an RNA interference (RNAi) screen and identified a putative 3M-bM-^@M-2M-bM-^FM-^R5M-bM-^@M-2 exoribonuclease CG9247/nibbler essential for the generation of the smaller isoforms of miR-34. Nibbler (Nbr) interacts with Ago1 and processes miR-34 within RISC. Deep sequencing analysis revealed a larger set of multi-isoform miRNAs that are controlled by nibbler. These findings suggest that Nbr-mediated 3M-bM-^@M-2 end processing represents a critical step in miRNA maturation that impacts miRNA diversity. Total RNA was isolated using mirVana (Ambion) and size-fractionated by PAGE into 18-30nt. These were independently processed and sequenced using the Illumina GAII platform. In total, four libraries were analyzed.

2011-11-17 | E-GEOD-31689 | biostudies-arrayexpress

RNAi knock down of export factors in Drosphila Schneider cell lines

Project description:Six different endogenous Drosophila proteins (all potential export factors) have been inactivated using RNAi and leptomycin B (LMB) treatments. Five different endogenous Drosophila proteins (all potential export factors) have been targeted by RNAi. The effect on mRNA export is analyzed by monitoring the levels of mRNAs in cytoplasmic and total samples. Samples from knock-downs are compared to samples obtained from (GFP transfected) control cells processed in parallel. [The two samples compared have the same name, but the suffix _KD for knock down and _ctrl for the control]. The potential export factors targeted by RNAi are: NXF1, NXF2, NXF3, p15 and UAP56. In an additional control experiment the translation initiation factor eIF4G was targeted by RNAi (to control for the specificity of the observed effects). The samples were taken 2 (nxf1_d2), 4 (nxf1_d4, p15_d4, uap56_d4), 5 (nxf2_d5, nxf3_d5) or 6 (IF_d6) days after transfecting with dsRNA. Crm1, a transport factor responsible for protein export and the export of UsnRNAs and ribosomal subunits, has been specifically inactivated using LMB (instead of RNAi).

2003-05-15 | E-MEXP-4 | biostudies-arrayexpress

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