Arabidopsis Response to Abscisic Acid Regulate RNA NAD+-Capping
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ABSTRACT:
PROVIDER: PRJNA596797 | ENA |
REPOSITORIES: ENA
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Project description:Eukaryotic messenger RNAs (mRNAs) possess a 5’-end N7-methyl guanosine (m7G) cap that promotes their translation and stability. However, it was recently demonstrated that eukaryotic mRNAs can also carry a 5' end nicotinamide adenine dinucleotide (NAD+) cap that promotes mRNA decay mediated by the NAD+ decapping enzyme DXO1. However, the dynamic regulation of NAD+ capping in plant remains unknown. Here, we describe the global landscape of NAD+-capped RNAs in Arabidopsis thaliana, and demonstrate that DXO1 is responsible for removal of these 5’-end modifications and facilitates mRNA degradation in plant transcriptomes. We also reveal that in the absence of DXO1 NAD+-capped mRNAs are unstable and processed into smRNAs. Furthermore, we find that Abscisic Acid (ABA) remodel the landscape of RNA cap epitransciptome, and the mRNA lost their NAD+ cap contribute to their stability under ABA. Overall, our results support a link between ABA response and RNA NAD+ capping.
2020-11-23 | GSE142389 | GEO
Project description:Eukaryotic messenger RNAs (mRNAs) possess a 5’-end N7-methyl guanosine (m7G) cap that promotes their translation and stability. However, it was recently demonstrated that eukaryotic mRNAs can also carry a 5' end nicotinamide adenine dinucleotide (NAD+) cap that promotes mRNA decay mediated by the NAD+ decapping enzyme DXO1. However, the dynamic regulation of NAD+ capping in plant remains unknown. Here, we describe the global landscape of NAD+-capped RNAs in Arabidopsis thaliana, and demonstrate that DXO1 is responsible for removal of these 5’-end modifications and facilitates mRNA degradation in plant transcriptomes. We also reveal that in the absence of DXO1 NAD+-capped mRNAs are unstable and processed into smRNAs. Furthermore, we find that Abscisic Acid (ABA) remodel the landscape of RNA cap epitransciptome, and the mRNA lost their NAD+ cap contribute to their stability under ABA. Overall, our results support a link between ABA response and RNA NAD+ capping.
2020-11-23 | GSE142388 | GEO
Project description:This SuperSeries is composed of the SubSeries listed below.
2020-11-23 | GSE142390 | GEO
Project description:NAD besides its key role in cellular metabolism can serve as an alternative 5’ cap at several short non-coding RNAs. However, the function of the NAD cap remains elusive. Here, we investigate NAD capping of RNAs upon HIV-1 infection, which is associated with intracellular pellagra – depletion of NAD/NADH cellular pool. We applied NAD captureSeq on HIV-1 infected/noninfected cells and we revealed that four snRNAs (U1, U4ATAC, U5E and U7) and four snoRNAs (snord3G, snord102, snorA50A and snord3B) lost NAD cap upon HIV-1 infection. Interestingly, U1 snRNA was previously shown to be essential for HIV-1 replication. We provide evidence that the NAD cap reduces the stability of the U1 - HIV-1 pre-mRNA duplex. The importance of NAD RNA cap in HIV-1 infection was further supported by NAD decapping enzyme DXO overexpression, which led to increase in HIV-1 infectivity. This is the first example of NAD cap function in mammalian cells and suggests a general role of non-canonical RNA caps in antiviral innate immunity response.
2024-05-16 | GSE191019 | GEO
Project description:Landscape of RNA NAD+ capping in Arabidopsis unopened flower bud
| PRJNA596802 | ENA
Project description:Landscape of RNA NAD+ capping in Arabidopsis seedling with ABA treatment
| PRJNA596803 | ENA
Project description:Nicotinamide adenine dinucleotide (NAD), a nucleotide-containing metabolite, can be incorporated into the RNA 5’-terminus to result in NAD-capped RNA (NAD-RNA). Since NAD has been heightened as one of the most essential metabolites in cells, its attachment to RNA might indicate a yet-to-be discovered mechanism at the epitranscriptomic level. Here, we design a highly-sensitive method, DO-seq, to capture NAD-RNAs. Using Drosophila, we identify thousands of previously unexplored NAD-RNAs and their dynamics in the fly life cycle, from embryo to adult. We show the evidence that chromosomal clustering might be the structural basis by which co-expression can couple with NAD capping on physically and functionally-linked genes. Furthermore, we note that NAD capping of cuticle genes seems to inversely correlate with gene expression. Combined, we propose NAD-RNA epitranscriptome as a hidden layer of regulation that profoundly impacts biological processes. DO-seq empowers the identification of NAD-capped RNAs, facilitating functional investigation into this modification.
2023-12-21 | GSE228505 | GEO
Project description:Nitrates increase abscisic acid levels to regulate haustoria formation in the parasitic plant Phtheirospermum japonicum
| PRJNA737113 | ENA
Project description:Recent findings regarding NAD+-capped RNAs (NAD-RNAs) indicate that prokaryotes and eukaryotes employ non-canonical RNA capping to regulate genes, a previously unrecognized mechanism. Two methods for transcriptome-wide analysis of NAD-RNAs, NAD captureSeq and NAD tagSeq, are based on copper-catalyzed azide-alkyne cycloaddition click chemistry reaction to label NAD-RNAs. However, copper can fragment RNA, interfering with the analyses. Here we report development of NAD tagSeq II, which uses copper-free, strain-promoted azide-alkyne cycloaddition for labeling NAD-RNAs, followed by identification of tagged RNA by direct RNA sequencing. Using this method, we compared NAD-RNA and total transcript profiles of E. coli cells in the exponential and stationary phases and identified hundreds of NAD-RNA species. For some genes, the majority of their transcripts were found as NAD-RNAs. Our study indicates that NAD-RNAs are preferentially produced from inducible genes in response to different growth conditions.
2021-04-21 | GSE153253 | GEO
Project description:The analysis of capped RNAs by massively parallel sequencing has identified a large number of previously unknown transcripts, some of which are small RNAs and others are 5M-bM-^@M-^Y truncated forms of RefSeq genes. The latter may be generated by endonuclease cleavage or by stalling of Xrn1 at defined sites. With the exception of promoter-proximal transcripts the caps on all of these are added post-transcriptionally by a cytoplasmic capping enzyme complex that includes capping enzyme and a kinase that converts 5M-bM-^@M-^Y-monophosphate ends to a diphosphate capping substrate. We previously described a modified form of capping enzyme with dominant negative activity against cytoplasmic capping (DN-cCE). A tet-inducible form of this was used to identify substrates for cytoplasmic capping by treating cytoplasmic RNA from control and induced cells with and without Xrn1. Surviving RNA was analyzed on Affymetrix Human Exon 1.0 arrays and scored for changes in probe intensity as a function of its position on each RefSeq gene to derive a factor (alpha) that could be compared between sets. Notably, transcriptome-wide changes were not evident unless RNA was treated with Xrn1. This analysis identified 2,666 uncapped mRNAs in uninduced cells, 672 mRNAs that appeared in the uncapped pool in cells expressing DN-cCE, and 835 mRNAs that were in both populations. Changes in cap status of 10 re-capping targets and 5 controls were assessed by 3 independent measures; susceptibility to Xrn1, recovery with a biotin-tagged DNA primer after ligating a complementary RNA oligonucleotide to uncapped 5M-bM-^@M-^Y ends, and binding or exclusion from a high affinity cap-binding matrix comprised of immobilized eIF4E and the corresponding binding domain of eIF4G. 3 biological replicates of 4 different samples comparing XRN1 treatment/non-treatment and Dox induction/non-induction of K294A
2012-12-20 | E-GEOD-36729 | biostudies-arrayexpress