Preferential re-replication of Drosophila heterochromatin
Ontology highlight
ABSTRACT:
ORGANISM(S): Drosophila melanogaster
SUBMITTER: David MacAlpine
PROVIDER: E-GEOD-20932 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:Viruses are obligate intracellular parasites, which depend on the host cellular machineries to replicate their genome and complete their infectious cycle. Long double stranded (ds)RNA is a common viral by-product originating during RNA virus replication, which is universally sensed as a danger signal to trigger the antiviral response. As a result, viruses hide dsRNA intermediates into viral replication factories and have evolved strategies to hijack cellular proteins for their benefit. The characterization of the host factors associated to viral dsRNA and involved in viral replication remains a major challenge to develop new antiviral drugs against RNA viruses. Here, we performed anti-dsRNA immunoprecipitation followed by Mass Spectrometry to fully characterize the dsRNA interactome in Sindbis virus (SINV) infected human HCT116 cells. Among the validated factors, we characterized SFPQ (Splicing factor, proline-glutamine rich) as a new dsRNA-associated factor upon SINV infection. We proved that SFPQ is able to directly bind dsRNAs in vitro, that SFPQ association to dsRNA is independent on single-stranded (ss)RNA flanking regions in vivo and that it is able to bind the viral genome upon infection. Furthermore, we showed that either knock-down or knock-out of SFPQ reduced SINV infection in human HCT116 and SKNBE cells, suggesting that SFPQ could enhance viral replication. Overall, this study not only represents a resource to further study SINV dsRNA-associated factors upon infection but also identifies SFPQ as a new proviral dsRNA binding protein.
2024-05-22 | PXD024554 | Pride
Project description:DNA copy number profile of Drosophila Kc167 cells comparing control pUC dsRNA treated cells and geminin dsRNA treated cells.
2010-03-18 | GSE20932 | GEO
Project description:The ubiquitin proteasome system (UPS) is known to possess important regulatory functions in the immune response. To gain a better and first comprehensive insight into the mechanisms underlying the conversion of immature to mature DC in terms of the expression of UPS related genes, we undertook a comparative gene expression profiling during DC maturation in response to four different prototypic maturation stimuli. Experiment Overall Design: Monocyte-derived DC were harvested at 3 different periods of time following stimulation for RNA extraction and hybridization on Affymetrix microarrays.
2009-02-09 | E-GEOD-10316 | biostudies-arrayexpress
Project description:modENCODE_submission_3201 This submission comes from a modENCODE project of David MacAlpine. For full list of modENCODE projects, see http://www.genome.gov/26524648 Project Goal: Analysis of copy number variation across modENCODE Drosophila cell line by high throughput sequencing. We observe numerous copy number variations for the different cell lines, with each cell line having a distinct ploidy signature. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf EXPERIMENT TYPE: deep sequencing analysis. BIOLOGICAL SOURCE: Cell Line: CME-W1-Cl.8+; Tissue: dorsal mesothoracic disc; Developmental Stage: third instar larval stage; Sex: Male; EXPERIMENTAL FACTORS: Cell Line CME-W1-Cl.8+ In this experiment, there is no ChIP step. Simply separate the polytene dna from the tissue (cell line) and seq them, if more reads (than other regions) then they are the CNV regions. Two independent samples were merged to generate the single wiggle file.
2011-03-23 | E-GEOD-28136 | biostudies-arrayexpress
Project description:In mammals, double-stranded RNA (dsRNA) plays roles in sequence-specific RNA interference, sequence-independent interferon response, and RNA editing by adenosine deaminases. We have previously shown that long hairpin dsRNA expression in cultured cells does not activate the interferon response, it is poorly processed into siRNAs, and it is partially edited. Here, we demonstrate that dsRNA expressed from transiently transfected plasmids strongly inhibits expression of co-transfected reporter plasmids but not expression of endogenous genes or reporters stably integrated in the genome. The inhibition is concentration-dependent and independent of a cell type, transfection method, or dsRNA sequence. The inhibition occurs at the level of translation and is mediated by protein kinase R (PKR). PKR binds the expressed dsRNA, becomes phosphorylated and changes its distribution along polysome fractions. In conclusion, we demonstrate that expression from plasmids is selectively repressed if one of co transfected plasmids produces dsRNA. Our results highlight the importance of proper controls and careful interpretation of co-transfection experiments. HEK293 cells (human origin) were transiently transfected with hairpin dsRNA-expressing (MosIR) and control (pCag) plasmids.
2013-12-27 | E-GEOD-46959 | biostudies-arrayexpress
Project description:2 million cells were seeded in a 2 ml medium containing 58 µg of total dsRNA. For coRNAi treatments 28 µg of each single dsRNA were used. After treatment cells were left to incubate 4 d at 25 °C, and plates were sealed with Parafilm to avoid medium evaporation. 8 samples were prepared with the following dsRNA treatment combinations: RLUC/RLUC x 2, CSN5/RLUC, CSN8/RLUC, CDK2/CSN5, CDK2/CSN8, CDK2/RLUC 2x . dsRNAs were taken from the HD3-dsRNA-library. Two dsRNAs per gene were pooled. The single-cell transcriptomic sequencing experiment was performed with 10x Genomics technology according to the manufacturer’s protocol.
2022-01-03 | E-MTAB-11196 | biostudies-arrayexpress
Project description:modENCODE_submission_2551 This submission comes from a modENCODE project of David MacAlpine. For full list of modENCODE projects, see http://www.genome.gov/26524648 Project Goal: Analysis of copy number variation across modENCODE Drosophila cell line by high throughput sequencing. We observe numerous copy number variations for the different cell lines, with each cell line having a distinct ploidy signature. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf Keywords: deep sequencing analysis EXPERIMENT TYPE: deep sequencing analysis. BIOLOGICAL SOURCE: Cell Line: S2-DRSC; Tissue: embryo-derived cell-line; Developmental Stage: late embryonic stage; Sex: Male; EXPERIMENTAL FACTORS: Cell Line S2-DRSC
2010-01-21 | E-GEOD-19956 | biostudies-arrayexpress
Project description:modENCODE_submission_2553 This submission comes from a modENCODE project of David MacAlpine. For full list of modENCODE projects, see http://www.genome.gov/26524648 Project Goal: Analysis of copy number variation across modENCODE Drosophila cell line by high throughput sequencing. We observe numerous copy number variations for the different cell lines, with each cell line having a distinct ploidy signature. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf Keywords: deep sequencing analysis EXPERIMENT TYPE: deep sequencing analysis. BIOLOGICAL SOURCE: Cell Line: ML-DmBG3-c2; Tissue: CNS-derived cell-line; Developmental Stage: third instar larval stage; Genotype: y v f mal; Sex: Unknown; EXPERIMENTAL FACTORS: Cell Line ML-DmBG3-c2
2010-01-21 | E-GEOD-19958 | biostudies-arrayexpress
Project description:modENCODE_submission_2552 This submission comes from a modENCODE project of David MacAlpine. For full list of modENCODE projects, see http://www.genome.gov/26524648 Project Goal: Analysis of copy number variation across modENCODE Drosophila cell line by high throughput sequencing. We observe numerous copy number variations for the different cell lines, with each cell line having a distinct ploidy signature. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf Keywords: deep sequencing analysis EXPERIMENT TYPE: deep sequencing analysis. BIOLOGICAL SOURCE: Cell Line: Kc167; Tissue: embryo-derived cell-line; Developmental Stage: late embryonic stage; Genotype: se/e; Sex: Female; EXPERIMENTAL FACTORS: Cell Line Kc167
2010-01-21 | E-GEOD-19957 | biostudies-arrayexpress
Project description:Transcription factor Met knockdown by dsRNA injection and compared to dsRNA-GFP injected control. Met was knocked down to determine whether it plays a role in response to traditional public health insecticides in addition to juvenile hormone homologs.
2018-09-30 | E-MTAB-4043 | biostudies-arrayexpress