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Mouse and Rat

ABSTRACT: Alternative cleavage and polyadenylation regulation in cellular senescence

PROVIDER: PRJNA301190 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR2903102_1.fastq.gz	Fastqsanger.gz
	SRR2903102_2.fastq.gz	Fastqsanger.gz
	SRR2912180_1.fastq.gz	Fastqsanger.gz
	SRR2912180_2.fastq.gz	Fastqsanger.gz
	SRR2912181_1.fastq.gz	Fastqsanger.gz

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Project description:Alternative cleavage and polyadenylation in cellular senescence

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Project description:Cleavage factor I mammalian (CFIm) complex, composed of cleavage and polyadenylation specificity factor CPSF6, regulates alternative polyadenylation (APA). CPSF6 has a RS-like domain which plays role in protein -protein interactions. This interaction might have role in alternative polyadenylation site selection. The phosphorylation of RS- like domain might play role in protein -protein interaction and thus might have a role in alternative polyadenylation site selection. So we did mass specteroanalysis to analyse phosphorylation sites of RS-like domain of CPSF6.

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Project description:Alternative polyadenylation dependent function of splicing factor SRSF3 contributes to cellular senescence

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Regulation of alternative polyadenylation by the C2H2-zinc finger protein Sp1 [ChIP-Seq]

Project description:About 70% of human genes carry multiple polyadenylation signals, and mRNA 3’end formation is dynamically regulated under different physiological conditions. Global 3’end shortening through alternative polyadenylation (APA) correlates with enhanced cellular proliferation, and 3’ untranslated region (UTR) shortening is a widespread phenomenon in tumour cells, where it appears to enhance tumorigenic properties. However, the mechanisms responsible for this dynamic APA regulation remain incompletely understood. Here we show that transcription factor Sp1 binds directly to RNA in vivo and is a common repressor of distal poly (A) site usage. RNA-sequencing (RNA-seq) analysis identified 2344 genes (36% of total mapped mRNA transcripts) with lengthened 3’UTRs upon Sp1 depletion. Sp1 preferentially binds in vivo within the 3’UTRs of many of these lengthened transcripts and inhibits cleavage at distal sites by interacting physically with subunits of the core cleavage and polyadenylation (CPA) machinery. The 3’UTR lengths of Sp1 target genes in breast cancer patient RNA-seq data correlate with Sp1 expression levels, implicating Sp1-mediated APA regulation in modulating tumorigenic properties. Taken together, our findings reveal an important mechanism for dynamic APA regulation by unraveling a novel function of Sp1.

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The Nrd1-like protein Seb1 coordinates co-transcriptional 3â end processing and polyadenylation site selection

Project description:Termination of RNAPII transcription is associated with RNA 3â end formation. For coding genes, termination is initiated by the cleavage/polyadenylation machinery. In contrast, a majority of noncoding transcription events in S. cerevisiae do not rely on RNA cleavage for termination, but instead terminate via a pathway that requires the Nrd1-Nab3-Sen1 (NNS) complex. Here we show that the S. pombe ortholog of Nrd1, Seb1, does not function in NNS-like termination, but promotes polyadenylation site selection of coding and noncoding genes. We found that Seb1 associates with 3â end processing factors, is enriched at the 3â end of genes, and binds RNA motifs downstream of cleavage sites. Importantly, a deficiency in Seb1 resulted in widespread changes in 3â UTR length as a consequence of increased alternative polyadenylation. Given that Seb1 levels affected the recruitment of conserved 3â end processing factors, our findings indicate that the conserved RNA-binding protein Seb1 co-transcriptionally controls alternative polyadenylation. Two biological replicates of Seb1 and Control (parental strain) CRAC experiments

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Project description:Alternative cleavage and polyadenylation in spermatogenesis coordinates chromatin regulation and post-transcriptional control

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