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RNA-RNA interaction analysis of functional SINE repeat elements-derived transcripts

ABSTRACT: RNA-RNA interaction analysis of functional SINE repeat elements-derived transcripts

PROVIDER: PRJNA931610 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23341282.fastq.gz	Fastqsanger.gz
	SRR23341283.fastq.gz	Fastqsanger.gz
	SRR23341284.fastq.gz	Fastqsanger.gz
	SRR23341285.fastq.gz	Fastqsanger.gz

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RNA-RNA interaction analysis of functional SINE repeat elements-derived transcripts

Project description:We studied functional and structural features of mouse and human SINE repeat elements-derived RNAs in SINEUP long non-coding RNAs which upregulate the translation of the target protein coding gene. To check the interaction of functional SINE RNAs with ribosomal RNAs, we created PARIS2 (psoralen analysis of RNA interactions and structures) libraries from SINEUP (with embedded mouse SINEB2 or human FRAM repeat) and the target sense GFP plasmids co-transfected human cells.

2023-02-06 | GSE224533 | GEO

Analysis of the interactome of B2-SINE RNA transcripts

Project description:B2-SINEs are noncoding RNAs which are transcribed by RNA polymerase III (Pol III) from short interspersed nuclear elements (SINEs), which are high copy number transposable elements in the mouse genome. Unexpectedly have observed significant induction of non-coding RNAs from the B2-SINE subclass of repeat element RNAs in DRG neurons following sciatic nerve injury. We next sought to identify intracellular targets of GI-SINEs, by protein pull-down from sciatic nerve axoplasm using biotinylated B2-SINE RNA as bait. We generated two constructs from the B2 consensus sequence, comprising 5’ (1-75nt) and 3’ (75-166nt) sequences, both predicted to retain their respective structures, and used the constructs to pull down axoplasm proteins for mass spectrometry analysis

2025-09-29 | PXD041633 | Pride

Analysis of the interactome of B2-SINE RNA transcripts

2025-05-05 | PXD060976 | Pride

In-cell RNA secondary structure analysis of functional SINE transcripts

Project description:SINEUPs are long non-coding RNAs which contain a functionally crucial SINE repeat element and positively regulate target mRNA translation at post-transcription level. To study secondary (2D) structure of these functional SINE-derived RNAs, various SINEUP-GFP plasmids containing different mouse SINEB2 repeat elements or human SINE FRAM repeat were transfected along with sense EGFP plasmid in HEK293T/17 cells. Total RNA in transfected cells were probed at flexible regions with NAI-N3 reagent and icSHAPE (in-vivo click selective hydroxyl acylation and profiling experiment) libraries were prepared. To further understand the structure dynamics of SINE transcripts in subcellular locations, cells were fractionated in nuclear and cytoplasmic fractions after 24 h of transfection and fraction-specific icSHAPE libraries were constructed.

2023-02-06 | GSE224534 | GEO

In-cell RNA secondary structure analysis of functional SINE transcripts

Project description:In-cell RNA secondary structure analysis of functional SINE transcripts

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SINE RNAs trigger noncanonical NLRC4 inflammasome via DDX17

Project description:Short interspersed element (SINE) RNAs are upregulated by cellular stresses1 (heat shock, DNA damage and viral infection) and accumulate in human diseases (macular degeneration2, lupus3, and Alzheimer’s disease4). These transcripts activate inflammasomes5, a family of cytoplasmic multiprotein complexes that sense danger molecules and initiate innate immune responses by activating caspase-1-dependent cytokine production and inflammatory death6, but the molecular sensor of SINE RNAs is unknown. Here, we identify DDX17, a member of the DEAD box family of RNA helicases7, as a sensor of SINE RNAs requisite for inflammasome activation. Induction of caspase-1 cleavage and release of IL-1 and IL-18 by SINE RNAs requires dual recruitment of NLRP3 and NLRC4 but proceeds independent of NAIPs, immune sensors required for canonical NLRC4 activation by bacterial proteins8,9. Instead, SINE RNAs trigger DDX17–NLRC4 interaction, which licenses inflammasome activation. We also report increased levels of DDX17 protein and association of DDX17 and NLRC4 in the retinal pigmented epithelium (RPE) of human eyes with an advanced, untreatable form of age-related macular degeneration (AMD). Disrupting DDX17–NLRC4 signalling blocks SINE RNA-induced inflammasome activation in human RPE cells and RPE degeneration in an animal model of AMD. Our findings uncover a non-canonical mode of inflammasome activation by endogenous retrotransposon transcripts, and provide new potential targets for macular degeneration and potentially other diseases.

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Next generation sequencing of MA-10 mouse Leydig tumor cells facilitates quantitative analysis of SINE B2-antisense transcripts with the RNAi system: wild type and Dicer1-knockdown transcriptomes

Project description:We report the comparison between SINE B2-AS transcriptome profiling and Dicer1-deficient-cell transcriptome profiling using RNA-seq analysis. We report that thousands of SINE B2 copies encode long B2-AS transcripts, which are constantly degraded by Dicer1. This new class of B2-AS transcripts regulates the expression of SINE B2 sense (B2-S) transcripts. Long B2-S is the main cause of cellular toxicity likely mediated by the multifunctional protein TSPO. Some B2-AS transcripts are putative miRNAs interconnected with the RNAi system. We propose that B2-AS transcripts have evolved as a self-defense mechanism to subvert the host RNAi system.

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Project description:Mouse SINE B2 elements function as IFN-inducible enhancer elements [RNA-Seq]

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m6A RNA methylation of major satellite repeat transcripts facilitates chromatin association and RNA:DNA hybrid formation in mouse heterochromatin

Project description:m6A RNA methylation of major satellite repeat transcripts facilitates chromatin association and RNA:DNA hybrid formation in mouse heterochromatin

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Project description:We identified a novel long non-coding RNA Lx8-SINE B2, that is a marker of pluripotency. Depletion of Lx8-SINE B2 impacts embryonic stem cell self-renewal. RNA-seq analysis of Lx8-SINE B2 depletion revealed that a number of glycolytic genes with decreased expression. Mechanistically, we found that the Lx8-SINE B2 activates the glycolysis pathway by binding to Eno1. Collectively, our data suggest that Lx8-SINE B2 maintains the self-renewal of mESCs through glycolysis.

2022-09-19 | GSE182247 | GEO

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