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Homo sapiens

ABSTRACT: ADAR1 controls apoptosis of stressed cells by inhibiting Staufen-mediated mRNA decay

PROVIDER: PRJNA338496 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR4018450_1.fastq.gz	Fastqsanger.gz
	SRR4018450_2.fastq.gz	Fastqsanger.gz
	SRR4018451_1.fastq.gz	Fastqsanger.gz
	SRR4018451_2.fastq.gz	Fastqsanger.gz
	SRR4018446_1.fastq.gz	Fastqsanger.gz

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ADAR1 controls apoptosis of stressed cells by inhibiting Staufen-mediated mRNA decay

Project description:Both p150 and p110 isoforms of ADAR1 convert adenosine to inosine in double-stranded RNA (dsRNA). The p150 isoform suppresses the dsRNA sensing mechanism that activates the interferon induction mediated by the MDA5-MAVS signaling. In contrast, the biological function of the p110 isoform localized in the nucleus remains largely unknown. Here we show that stress-activated phosphorylation of ADAR1p110 by MKK6/p38 MAP kinases promotes its binding to Exportin-5 and nuclear export to the cytoplasm. Once translocated to the cytoplasmic, ADAR1p110 suppresses apoptosis of stressed cells by protecting many anti-apoptotic gene transcripts that contain 3’UTR dsRNA structures such as those consisting of inverted Alu repeats. ADAR1p110 competitively inhibits binding of Staufen1 to the 3’UTR dsRNAs and antagonizes the Staufen1-mediated mRNA decay mechanism. Our studies revealed a new stress response mechanism regulated by MAP kinases, in which ADAR1p110 translocates to the cytoplasm and regulates a class of mRNAs required for survival of stressed cells.

2017-03-21 | GSE85455 | GEO

Convergent exaptation of Alu and B/ID SINEs for Staufen-mediated mRNA decay

Project description:Convergent exaptation of Alu and B/ID SINEs for Staufen-mediated mRNA decay

| PRJNA352669 | ENA

Staufen1 regulates a variety of mammalian transcripts

2007-12-26 | GSE6679 | GEO

Small RNA analysis of wildtype Mouse embryo and Adar1 null mouse embryo at E11.0 and E11.5 together with mRNA-seq results of E11.5

Project description:Adar1 is an essential gene for mouse embryonic development. Adar1 null mouse embryos dies around E11.5 because of massive apoptosis. Small RNA: 4 samples examined: wild type E11.0, ADAR1 null E11.0, wild type E11.5, ADAR1 null E11.5, mRNA-seq: wild type E11.5, ADAR1 null E11.5.

2013-05-01 | E-GEOD-33473 | biostudies-arrayexpress

IP Staufen1

Project description:In human cells, Staufen1 is double-stranded RNA-binding protein involved in several cellular functions including mRNA localization, translation and decay. We used a genome wide approach to identify and compare the mRNA targets of mammalian Staufen1. The mRNA content of Staufen1 mRNPs was identified by probing DNA microarrays with probes derived from mRNAs isolated from immunopurified Staufen-containing complexes following transfection of HEK293T cells with a Stau1-HA expressor. Our results indicate that 7% of the cellular RNAs expressed in HEK293T cells are found in Stau1-containing mRNPs. There is a predominance of mRNAs involved in cell metabolism, transport, transcription, regulation of cell processes and catalytic activity. Keywords: Immunoprecipitation, Staufen, microarray

2008-01-18 | GSE8438 | GEO

Ultraconserved elements are associated with control of splicing regulators by alt splicing and nonsense mediated decay

Project description:We blocked nonsense-mediated mRNA decay (NMD) pathway and used a custom alternative transcript sensitive Affymetrix microarray to seek alternatively spliced RNAs whose levels increased compared to controls. Keywords: Nonsense Mediated Decay (NMD)

2007-08-31 | GSE6611 | GEO

Transcriptome analysis revealed that SMD regulates neuronal differentiation.

Project description:Transcriptome analysis from Staufen-mediated mRNA (SMD) targets during differentiation confirmed that STAU1 was a key factor in neuronal differentiation.

2017-02-27 | GSE94948 | GEO

siRNA of human HeLa cells reveals Staufen1 regulates a variety of mammalian transcripts

Project description:It is currently unknown how extensively the double-stranded RNA binding protein Staufen (Stau)1 is utilized by mammalian cells to regulate gene expression. To date, Stau1 binding to the 3â untranslated region (3âUTR) of ARF1 mRNA has been shown to target ARF1 mRNA for Stau1-mediated mRNA decay (SMD). ARF1 SMD depends on translation and recruitment of the nonsense-mediated mRNA decay factor Upf1 to the ARF1 3âUTR by Stau1. Here, we use microarray analyses to examine changes in the abundance of cellular mRNAs that occur when Stau1 is depleted. Results indicate that 1.1% and 1.0% of the 11,569 HeLa-cell transcripts that were analyzed are, respectively, upregulated and downregulated at least two-fold in three independently performed experiments. Additionally, we localize the Stau1 binding site to the 3âUTR of four mRNAs that we define as natural SMD targets. Together, these and substantiating results suggest that Stau1 influences the expression of a wide variety of physiologic transcripts and metabolic pathways. Experiment Overall Design: We report the results of three independently performed microarray analyses that examined changes in the abundance of transcripts from HeLa-cell genes upon Stau1 depletion. HeLa cells were transiently transfected with either a nonspecific Control small interfering (si)RNA or Stau1 siRNA. Stau1 siRNA reduced the level of cellular Stau1 to as little as 4% of normal, where normal is defined as the level in the presence of Control siRNA (data not shown). RNA from three independently performed transfections was separately hybridized to microarrays.

2008-06-15 | E-GEOD-6679 | biostudies-arrayexpress

Systematic Mapping of ADAR1 Binding Reveals its Regulatory Roles in Multiple RNA Processing Pathways [small RNA-seq]

Project description:ADARs are the primary factors underlying A-to-I editing in metazoans. We conducted the first global study of ADAR1-RNA interaction in human cells using CLIP-Seq. In contrast to the expected predominant binding of ADAR1 to Alu repeats, thousands of CLIP sites were located in non-Alu regions. This unexpectedly frequent non-Alu binding enabled discovery of transcriptome-wide functional and biophysical targets of ADAR1 in the regulation of mRNA processing including alternative 3' UTR usage and alternative splicing. In addition, a global analysis of ADAR1 binding to non-Alu regions also revealed its primary interaction with microRNA (miRNA) transcripts in the nucleus, which subsequently affected expression levels of mature miRNAs. A complex global picture was revealed regarding the dependence of this function on the double-stranded RNA binding domains or deaminase activity. Our study unfolded a broad landscape of the diverse functional roles of ADAR1. To identify ADAR binding dependent miRNA defferential expression profiles, U87MG cells were transfected with ADAR1 overexpression vector, RNA binding mutant (EAA and E912A), siRNA of ADAR1 or controls.

2015-03-11 | E-GEOD-55362 | biostudies-arrayexpress

Drosophila melanogaster

Project description:D.melanogaster Nonsense-Mediated mRNA Decay study

| PRJNA205865 | ENA