Project description:RNA-binding proteins (RBPs) and non-coding RNAs orchestrate post-transcriptional processes through the recognition of specific sites on targeted transcripts. Thus, understanding the connection between binding to specific sites and active regulation of the whole transcript is essential. Many immunoprecipitation techniques have been developed that identify either whole transcripts or binding sites of RBPs on each transcript using cell lysates. However, none of these methods simultaneously measures the strength of each binding site, and quantifies binding to whole transcripts. In this study, we compare current procedures and present Digestion Optimized (DO)-RIP-seq, a simple method that locates and quantifies RBP binding sites using a continuous metric. We have used the RBP HuR/ELAVL1 to demonstrate that DO-RIP-seq can quantify HuR binding sites with high coverage across the entire human transcriptome, thereby generating metrics of relative RNA binding strength. We demonstrate that this quantitative enrichment of binding sites is proportional to the relative in vitro binding strength for these sites. Also, we used DO-RIP-seq to quantify and compare HuR's binding to whole transcripts, thus allowing for seamless integration of binding site data with whole transcript measurements. Finally, we demonstrate that DO-RIP-seq is useful for identifying functional mRNA target sets, and binding sites where combinatorial interactions between HuR and AGO-microRNAs regulate the fate of the transcripts. Our data indicate that DO-RIP-seq will be useful for quantifying RBP binding events that regulate dynamic biological processes. Overall design: Three HuR immunoprecipitation replicates and three matched negative control immunoprecipitation replicates.
Project description:RNA immunoprecipitation coupled with next generation sequencing (RIP-seq) was used to map the HNRNPL-RNA interactome in LNCaP cells. Overall design: Analysis of RIP-seq and total RNA data enabled the identification of the HNRNPL binding sites in the LNCaP cell transcriptome.
Project description:This study investigates the CsrA regulon of the food-borne pathogen Campylobacter jejuni. Direct RNA binding targets of CsrA in two strains of C. jejuni, NCTC11168 and 81-176, were determined using RIP-seq. Identification of CsrA binding sites in two C. jejuni strains using RIP-seq
Project description:Transposable elements (TEs) have significantly influenced the evolution of transcriptional regulatory networks in the human genome. Post-transcriptional regulation of human genes by TE-derived sequences has been observed in specific contexts, but has yet to be systematically and comprehensively investigated. Here, studied a collection of CLIP-Seq (CrossLinked ImmunoPrecipitation) experiments mapping the RNA binding sites for a diverse set of 46 human proteins across 68 experiments to explore the role of TEs in post-transcriptional regulation genome-wide via RNA-protein interactions. We detected widespread interactions between RNA binding proteins (RBPs) and various families of TE-derived sequence in the CLIP-Seq data. Alignment coverage clustered on specific positions of the TE consensus sequences, illuminating a diversity of TE-specific motifs for many RBPs. Evidence of binding and conservation of these motifs in the nonrepetitive transcriptome suggest that TEs have appropriated existing sequence preferences of the RBP. Upon depletion of the RBPs, transcripts possessing TE-derived binding sites were similarly regulated as those bound in nonrepetitive sequence. However, in a few cases the effect of RBP binding depended on the specific TE family bound—e.g., the ubiquitously expressed RBP HuR conferred opposite effects on stability to transcripts when bound to Alu elements versus other families. Our meta-analysis suggests a widespread role for TEs in shaping RNA-protein regulatory networks in the human genome. HuR formaldehyde RIP-Seq in K562 cells, with RIP and input sequenced in triplicate.
Project description:DEAD box RNA helicase DDX39A has been shown to regulate RNA metabolism; however its role in vertebrate development has not previously been examined. To determine the impact of loss of ddx39a on transcriptome during vertebrate early development, we pursued transcriptome analysis (RNA-Seq) on wild type and ddx39a mutant zebrafish embryos at 24 hour-post-fertilization. And by using RIP-seq to identify targeted RNA which were DDX39A binded. Overall design: Using RNA-seq to identify the changes in the transcriptomic landscape in ddx39a mutants. Using RIP-seq to identify DDX39A binding RNAs.
Project description:A key function for RNA-binding proteins in orchestrating plant development and environmental responses is well established. However, the lack of a genome-wide view on their in vivo binding targets and binding landscapes represents a gap in understanding the mode of action of plant RNA-binding proteins. Here, we conducted RNA Immunoprecipitation (RIP-seq) for genome-wide determining the binding repertoire of the circadian clock-regulated Arabidopsis thaliana glycine-rich RNA-binding protein AtGRP7. Overall design: AtGRP7 RIP-seq
Project description:This SuperSeries is composed of the following subset Series: GSE33569: In vivo and transcriptome-wide identification of RNA-binding protein target sites [PAR-CLIP] GSE33573: In vivo and transcriptome-wide identification of RNA-binding protein target sites [RNA-Seq] Refer to individual Series