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Mus musculus

ABSTRACT: Expression profiling of miR-294 and Mbd2 siRNA transfected Dgcr8-/- mESCs by high throughput sequencing

PROVIDER: PRJNA270999 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR1734390_1.fastq.gz	Fastqsanger.gz
	SRR1734390_2.fastq.gz	Fastqsanger.gz
	SRR1734400_1.fastq.gz	Fastqsanger.gz
	SRR1734400_2.fastq.gz	Fastqsanger.gz
	SRR1734391_1.fastq.gz	Fastqsanger.gz

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Opposing roles of miR-290 family and muscleblind-like proteins in the regulation of embryonic stem cell-specific alternative splicing and gene expression program

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Expression profiling of miR-294 and Mbd2 siRNA transfected Dgcr8-/- mESCs by high throughput sequencing

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Project description:Mouse Embryonic Stem (ES) cells express a unique set of microRNAs (miRNAs), the miR-290-295 cluster. To elucidate the role of these miRNAs and how they integrate into the ES cell regulatory network requires identification of their direct regulatory targets. The difficulty, however, arises from the limited complementarity of metazoan miRNAs to their targets, with the interaction requiring as few as six nucleotides of the miRNA seed sequence. To identify miR-294 targets, we used Dicer1-null ES cells, which lack all endogenous mature miRNAs, and introduced just miR-294 into these ES cells. We then employed two approaches to discover miR-294 targets in mouse ES cells: transcriptome profiling using microarrays, and a biochemical approach to isolate mRNA targets associated with the Argonaute2 (Ago2) protein of the RISC (RNA Induced Silencing Complex) effector, followed by RNA-Sequencing. In the absence of Dicer1, the RISC complexes are largely devoid of mature miRNAs, and should therefore contain only transfected miR-294 and its base-paired targets. Our data suggest that miR-294 may promote pluripotency by regulating a subset of c-Myc target genes, and upregulating pluripotency-associated genes such as Lin28. For RNA-IP experiments, cells were transfected with 300 pmol of miR-294 or cel-239b control miRNA (Dharmacon) and harvested 12-16 hr after transfection for immunoprecipitation. Following RNA-immunoprecipitation of Ago2-myc, RNA from the INPUT (total RNA) and IP were subjected to library preparation and sequenced by SOLiD. There are 10 samples from Dicer1-null mouse ES cells, which are essentially 5 sample pairs of INPUT (A) and its corresponding RNA-IP (B): Ago2-myc transfected with miR-294 (sampe 1), 2 replicates of Ago2-myc-MUT (catalytically inactive) transfected with miR-294 (sample 2 & 5), 2 replicates of Ago2-myc transfected with cel-239b (sample 3 & 4).

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