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Capturing the Interactome of Newly Transcribed RNA (PAR-CLIP)

ABSTRACT: Key features of gene transcription, such as transcriptional pausing, divergent transcription, and enhancer RNA production can be explored using techniques based on the incorporation of synthetic nucleoside analogs into RNA, followed by pull-down and high-throughput sequencing. Whether these approaches can be adapted to expand our knowledge of the RNA-bound proteome is, however, unexplored. Here, we have designed a methodology (isolation of the newly transcribed RNA Interactome using ClicK reaction; RICK) based on the incorporation of 5-ethynyluridine (EU) into newly transcribed RNAs to systematically capture proteins bound to RNAs of wide scope including traditionally neglected non-polyadenylated RNAs. Amongst the novel RNA-binding proteins identified by RICK, we found mitotic regulators, components of the DNA damage response pathway, and epigenetic regulators. Because the protocol can be easily modified to include variations such as labeling time or transcriptional interference, RICK will enable an in depth and global interrogation of the RNA-bound proteome.

ORGANISM(S): Homo sapiens

PROVIDER: GSE100754 | GEO | 2017/12/12

SECONDARY ACCESSION(S): PRJNA392924

REPOSITORIES: GEO

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Capturing the Interactome of Newly Transcribed RNA (RICK)

Project description:Key features of gene transcription, such as transcriptional pausing, divergent transcription, and enhancer RNA production can be explored using techniques based on the incorporation of synthetic nucleoside analogs into RNA, followed by pull-down and high-throughput sequencing. Whether these approaches can be adapted to expand our knowledge of the RNA-bound proteome is, however, unexplored. Here, we have designed a methodology (isolation of the newly transcribed RNA Interactome using ClicK reaction; RICK) based on the incorporation of 5-ethynyluridine (EU) into newly transcribed RNAs to systematically capture proteins bound to RNAs of wide scope including traditionally neglected non-polyadenylated RNAs. Amongst the novel RNA-binding proteins identified by RICK, we found mitotic regulators, components of the DNA damage response pathway, and epigenetic regulators. Because the protocol can be easily modified to include variations such as labeling time or transcriptional interference, RICK will enable an in depth and global interrogation of the RNA-bound proteome.

2017-12-12 | GSE100755 | GEO

Capturing the Interactome of Newly Transcribed RNA

Project description:Capturing the Interactome of Newly Transcribed RNA

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Project description:We have optimized the metabolic tagging of newly transcribed RNAs by 4-thiouridine (4sU) to identify newly-transcribed (nascent) circRNAs from human PA1 cells, undifferentiated H9 cells and H9 differentiated FB neurons.

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Homo sapiens

Project description:Capturing the Interactome of Newly Transcribed RNA (RICK)

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Homo sapiens

Project description:Capturing the Interactome of Newly Transcribed RNA (PAR-CLIP)

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Comparison of HCMV nascent and steady state transcriptomes expresssed in the Kasumi-3 latency model at early times post-infection

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RNA Affinity Purification followed by sequencing (RAP-seq) allows identification of transcriptome-wide RBP binding sites using recombinant RBPs and total purified cellular RNA

Project description:RAP-seq is a new method that provides in vitro derived RNA-Interactomes for any given RBP. In RAP-seq a recombinant RBP is produced as fusion with a HaloTag which is used to recover and purify the RBP of interest. The RBP-Halo fusion is then incubated with fragmented total RNA derived from any given sample of interest. The bound RNA fragments are subsequently eluted and cloned using a small RNA library preparation protocol for sequencing the pool of bound molecules on an Illumina NGS platform. In this study, RAP-seq was used to identify RNA-Interactomes of 26 novel RBPs (aka non-canonical RBPs) newly discovered in proteome-wide studies as RNA binders. RAP-seq was also used to profile vertebrate HuR orthologs and described the biochemical evolutionary differences and similarities of the 6 orthologs profiled. Cancer associated IGF2BP1, IGF2BP2 and IGF2BP3 variants were also profiled and transcriptome-wide changes in their RNA Interactomes with respect to the wild-type IGF2BPs were reported. Also a transcriptome-wide cooperative binding assay was perfomed to evaluate the cooperative roles of HuR and PTBP1 in binding to their native RNA targets. In addition, a tipical RAP-seq substrate (fragmented total RNA) if reverse-transcribed into cDNA and than in vitro transcribed again using a T7 RNA Polymerase can be depleted of any native endogenous RNA modifications and RAP-seq assyas perfomed in parallel with the native substrate and the T7 RNAP produced one allowed us to discern the m6A dependency in transcriptome-wide binding events for YTHDF1, hence with RAP-seq we also report T7-RAP-seq.

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