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Identification of the transcription start site of transcribed sequences from the mouse Sry locus by CAGE-seq

ABSTRACT: Identification of the transcription start site of transcribed sequences from the mouse Sry locus by CAGE-seq

PROVIDER: PRJNA635924 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11878477.fastq.gz	Fastqsanger.gz
	SRR11878478.fastq.gz	Fastqsanger.gz
	SRR11878479.fastq.gz	Fastqsanger.gz
	SRR11878480.fastq.gz	Fastqsanger.gz

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Identification of the transcription start site of transcribed sequences from the mouse Sry locus by CAGE-seq

Project description:The mammalian sex-determining gene Sry induces male development. Through analyzing transcriptome of pre-Sertoli cells, we identified a novel sequence transcribed within palindromic sequence surrounding Sry. To examine whether this sequence contains transcription start site, Cap analysis gene expression (CAGE) -seq analysis was performed, in which putative transcriptional start sites can be identified by sequencing the 3’ end of cDNA corresponding to 5’ end of RNA. CAGE seq revealed that Cap site was absent within the novel sequence, whereas Sry transcription start site found to locate in minus strand at chrY:2,663,800-2,663,900. Combining the result from long-read RNA seq, we concluded that this sequence is the second exon of mouse Sry.

2020-10-01 | GSE151473 | GEO

CAGE mapping Drosophila Hemocytes start sites

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NET-CAGE Characterizes the Dynamics and Topology of Human Transcribed Cis-regulatory Elements

Project description:Promoters and enhancers are key cis-regulatory elements, but how they operate to generate cell-type-specific transcriptomes is not fully understood. We developed a simple and robust approach to sensitively detect 5’-ends of nascent RNAs (NET-CAGE) in diverse cells and tissues, including unstable transcripts such as enhancer-derived RNAs. We studied RNA synthesis and degradation at the transcription start site (TSS) level, characterizing the impact of differential promoter usage on transcript stability. We quantified transcription from cis-regulatory elements without the influence of RNA turnover, and show that enhancer-promoter pairs are generally activated simultaneously upon stimulation. By integrating NET-CAGE data with chromatin interaction maps, we show that cis-regulatory elements are topologically connected according to their cell-type specificity. We identified new enhancers with high sensitivity, and delineated primary locations of transcription within super-enhancers. Our NET-CAGE dataset derived from human and mouse cells expands the FANTOM5 catalogue of transcribed enhancers, with broad applicability to biomedical research.

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SLIC-CAGE (Super-Low Input Carrier-CAGE) transcription start site mapping of mouse migratory and gonadal primordial germ cells, postnatal oocytes and early embryo

Project description:We used SLIC-CAGE to map transcription start sites (TSSs) of mouse primordial germ cells from embryonic days 9.5-16.5, postnatal oocytes (P6, P14 and MII), and early 2-cell and 4-cell mouse embryos. We use this TSS data to show that the mouse germline development starts with the somatic promoter code with a prominent switch to the maternal code (W-box dependent) occurring during the follicular oogenesis. We also find that the promoters of gonadal germ cells are characterised by a previously unknown divergence from the somatic transcription initiation. This divergence is distinct from the promoter code used later by the developing oocytes and reveals genome-wide promoter remodelling during early female and male germline development.

2022-02-14 | E-MTAB-9757 | biostudies-arrayexpress

Transcriptional start site mapping of P14 WT and P14 Tbpl2-/- mutant mouse oocytes

Project description:We used SLIC-CAGE to map transcriptional start sites (TSSs) of P14 WT and P14 Tbpl2-/- mutant mouse oocytes. Comparison of WT and Tbpl2-/- oocytes demonstrates that Tbpl2 guides transcriptional start site selection in the growing oocyte. This TSS selection is different compared to the canonical somatic type of TSS selection and depends on TATA-like elements as core promoter motifs, recognised by Tbpl2.

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CAGE sequences from three developmental states in the microcrustacean Daphnia pulex.

Project description:We report the application of CAGE (Cap Analysis of Gene Expression) on collections of Daphnia pulex individuals representing three major developmental states. This submission comes from a project of Michael Lynch and was funded by a grant from the National Institutes of Health entitled 'Population Genomics of Daphnia pulex' (Project Number: 1R01GM101672-01A1).

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Project description:<p>RNA-Seq is an effective method to study the transcriptome, but specialized methods are required to identify 5' ends of transcripts. Several published strategies exist for this specific purpose, but their relative merits have not been systematically analyzed. Here, we directly compare the performance of six such methods - testing five with cellular RNA as well as a novel spike-in RNA assay that helps address interpretation challenges that arise from uncertainties in annotation or RNA processing. Using a single human RNA sample, we constructed and sequenced 18 libraries with these methods and one standard, control RNA-Seq library. We find that the CAGE method performed best for mRNA and that most of its unannotated peaks are supported by evidence from other genomic methods. We then applied CAGE to eight brain-related samples and revealed sample-specific transcription start site (TSS) usage as well as a transcriptome-wide shift in TSS usage between fetal and adult brain.</p>

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