RNA-seq of N2 and HBR227 worms in L1 arrest (48 hours)
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ABSTRACT:
PROVIDER: PRJNA803492 | ENA |
REPOSITORIES: ENA
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Project description:Transcription factors are key components of regulatory networks that control development, as well as the response to environmental stimuli. We have established an experimental pipeline in C. elegans that permits global identification of the binding sites for transcription factors using chromatin immunoprecipitation and deep sequencing. We describe and validate this strategy, and apply it to the transcription factor PHA-4, which plays critical roles in organ development and starvation stress response. We defined binding sites for PHA-4 during formation of the embryonic pharynx, and in starved larvae. PHA-4 binds to thousands of locations throughout the genome. These sites shift dramatically between embryos and larvae, from developmentally regulated genes to genes involved in metabolism. We acquired transcriptome of wild type N2 worms at embyonic and starved L1 stages using RNA-seq method in comparing to the ChIP-seq experiment to study transcription factor binding. The wild type worms were cultured the same as the transgenic worms for transcription factor binding experiment. Keywords: Transcriptome Analysis For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf Two development stages embryo and starved larvae each contains 3 technical replicates are reported
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Project description:Transcription factors are key components of regulatory networks that control development, as well as the response to environmental stimuli. We have established an experimental pipeline in C. elegans that permits global identification of the binding sites for transcription factors using chromatin immunoprecipitation and deep sequencing. We describe and validate this strategy, and apply it to the transcription factor PHA-4, which plays critical roles in organ development and starvation stress response. We defined binding sites for PHA-4 during formation of the embryonic pharynx, and in starved larvae. PHA-4 binds to thousands of locations throughout the genome. These sites shift dramatically between embryos and larvae, from developmentally regulated genes to genes involved in metabolism. We acquired transcriptome of wild type N2 worms at embyonic and starved L1 stages using RNA-seq method in comparing to the ChIP-seq experiment to study transcription factor binding. The wild type worms were cultured the same as the transgenic worms for transcription factor binding experiment. Keywords: Transcriptome Analysis For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf
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Project description:Purpose: Comparing the transcriptome of wild-type(N2), hlh-11 knock-out and hlh-11 over-expression worms to identify genes with differential expression. Methods: For each condition, two replicates were examined. For each sample, approximately 2,000 synchronized young adult worms were collected and resuspended in TRIzon Reagent (CW0580, CWBIO). Total RNA was isolated by chloroform extraction, followed by isopropanol precipitation. Sequencing was performed using HiSeq2500. The clean reads were aligned to WBcel235 genomes with TopHat2. Gene differential expression was analyzed using DEseq2. A threshold of p < 0.05 was set to determine differentially expressed genes. Induction (KO_up or OE_up) or suppression (KO_down or OE_down) of genes were obtained through comparing gene expressions in hlh-11 KO or OE worms to wild-type N2. Results: >86% reads were uniquely mapped. 2637 genes were significantly up regulated and 2845 genes were significantly down regulated in hlh-11 knock-out worms compared to wild-type. 107 genes were significantly up regulated and 237 genes were significantly down regulated in hlh-11 over-expression worms compared to wild-type. Conclusions: This study revealed the genes transcriptionally regulated by hlh-11.
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