Arabidopsis thaliana
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ABSTRACT:
PROVIDER: PRJNA376878 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Defective XRN3-mediated transcription termination in Arabidopsis affects the expression of protein-coding genes [seq]
| PRJNA377231 | ENA
Project description:Transcription termination of mRNAs transcribed from a given locus has a decisive role in regulating the gene function as it determines the coding potential and inclusion of regulatory sequence elements. Failure in appropriate transcription termination leads to read-through transcription, resulting in the synthesis of antisense RNAs which can have profound impact on overall gene expression. However, molecular mechanisms which regulate transcription termination and chimeric RNA formation are poorly understood. We explored the regulatory function of transcription and export complex (THO/TREX) in transcription termination. We show that two members of THO/TREX complex, TREX COMPONENT 1 (TEX1) and HYPER RECOMBINATION1(HPR1) are critical for the correct transcription termination in Arabidopsis. We first demonstrate this by showing defective termination of the bacterial nopaline synthase (NOS) terminator on a transgene in tex1 and hpr1 mutants. Additionally, we show that RNA termination defects in tex1 and hpr1 mutants are widespread at the whole genome levels leading to 3’UTR extensions, truncations and in some cases in the formation of intergenic chimeric transcripts. Chromatin immunoprecipitation coupled with quantitative PCR experiments confirmed the presence of RNA polymerase II beyond the canonical termination sites on genes with defective RNA termination in tex1 and hpr1 mutants. These results demonstrate that THO/TREX complex is a novel regulator of transcription termination in Arabidopsis.
2020-03-24 | GSE128877 | GEO
Project description:EDM2 is a PHD finger-containing histone binding protein in Arabidopsis thaliana (Arabidopsis) that affects levels of the transposon silencing mark H3K9me2. Here we report on genome-wide profiling by ChIP-seq and RNA-seq of EDM2-mediated effects on H3K9me2 and rRNA-depleted transcripts, respectively. EDM2 affects H3K9me2 and/or transcript levels at hundreds transposons and over 3000 gene loci including 60 NLR genes. In addition, EDM2 also binds to several NLR genes and transposons.
2020-08-03 | GSE108487 | GEO
Project description:RNA-mediated transcriptional silencing prevents deleterious effects of transposon activity and controls the expression of protein-coding genes. It involves long non-coding RNAs (lncRNAs)1, which in Arabidopsis thaliana are produced by a specialized RNA Polymerase V (Pol V)2. lncRNAs guide Argonaute-siRNA complexes to specific genomic loci and mediate the establishment of DNA methylation3,4. The mechanism by which lncRNAs affect chromatin structure and mRNA production remains mostly unknown. Here we identify the SWI/SNF nucleosome remodeling complex as a component of the RNA-mediated transcriptional silencing pathway. We found that SWI3, an essential subunit of the SWI/SNF complex, physically interacts with a lncRNA-binding IDN2 protein5,6. RNA-mediated DNA methylation and transcriptional silencing was compromised in the swi3 mutant. Moreover, targets of SWI/SNF significantly overlapped with genes controlled by Pol V, which shows that the physical interaction reflects a functional relationship. We further found that non-coding transcription by Pol V affects nucleosome positioning on silenced regions. We propose that lncRNAs mediate transcriptional silencing by guiding the SWI/SNF complex and establishing positioned nucleosomes on specific genomic loci. We further propose that guiding ATP-dependent chromatin remodeling complexes may be a more general function of lncRNAs. RNA-seq of 3 samples (Col-0, nrpe1 [a mutant defective in the largest subunit of Pol V and unable to produce lncRNA], swi3b, idn2) with 3 biological replicates.
2012-12-01 | E-GEOD-38400 | biostudies-arrayexpress
Project description:There are thousands of unstable non-coding (nc) RNAs in humans, but their transcriptional regulation is poorly characterized compared to protein-coding transcripts. We recently identified a restrictor complex containing ZC3H4 and WDR82, which terminates non-coding transcription. Here we show that the ncRNA termination factor, ARS2, and the nuclear exosome targeting complex (NEXT) are part of this complex.ARS2/NEXT and WDR82 contact different parts of ZC3H4, which are required for its transcription regulatory function. They facilitateZC3H4-mediated termination by different mechanisms: ARS2 aids substrate targeting and WDR82 mediates RNA polymerase II interaction.ZC3H4 and WDR82 predominantly affect antisense, unstable, and intragenic ncRNAs. We provide an explanation for this by showing that U1 telescripting shields hundreds of protein-coding transcripts from their termination functions.We have defined an expanded ZC3H4 restrictor complex, its principles of action, and how protein-coding transcripts evade it.
2023-07-05 | GSE228293 | GEO
Project description:There are thousands of unstable non-coding (nc) RNAs in humans, but their transcriptional regulation is poorly characterized compared to protein-coding transcripts. We recently identified a restrictor complex containing ZC3H4 and WDR82, which terminates non-coding transcription. Here we show that the ncRNA termination factor, ARS2, and the nuclear exosome targeting complex (NEXT) are part of this complex.ARS2/NEXT and WDR82 contact different parts of ZC3H4, which are required for its transcription regulatory function. They facilitateZC3H4-mediated termination by different mechanisms: ARS2 aids substrate targeting and WDR82 mediates RNA polymerase II interaction.ZC3H4 and WDR82 predominantly affect antisense, unstable, and intragenic ncRNAs. We provide an explanation for this by showing that U1 telescripting shields hundreds of protein-coding transcripts from their termination functions.We have defined an expanded ZC3H4 restrictor complex, its principles of action, and how protein-coding transcripts evade it.
2023-07-05 | GSE228291 | GEO
Project description:There are thousands of unstable non-coding (nc) RNAs in humans, but their transcriptional regulation is poorly characterized compared to protein-coding transcripts. We recently identified a restrictor complex containing ZC3H4 and WDR82, which terminates non-coding transcription. Here we show that the ncRNA termination factor, ARS2, and the nuclear exosome targeting complex (NEXT) are part of this complex.ARS2/NEXT and WDR82 contact different parts of ZC3H4, which are required for its transcription regulatory function. They facilitateZC3H4-mediated termination by different mechanisms: ARS2 aids substrate targeting and WDR82 mediates RNA polymerase II interaction.ZC3H4 and WDR82 predominantly affect antisense, unstable, and intragenic ncRNAs. We provide an explanation for this by showing that U1 telescripting shields hundreds of protein-coding transcripts from their termination functions.We have defined an expanded ZC3H4 restrictor complex, its principles of action, and how protein-coding transcripts evade it.
2023-07-05 | GSE228290 | GEO
Project description:There are thousands of unstable non-coding (nc) RNAs in humans, but their transcriptional regulation is poorly characterized compared to protein-coding transcripts. We recently identified a restrictor complex containing ZC3H4 and WDR82, which terminates non-coding transcription. Here we show that the ncRNA termination factor, ARS2, and the nuclear exosome targeting complex (NEXT) are part of this complex.ARS2/NEXT and WDR82 contact different parts of ZC3H4, which are required for its transcription regulatory function. They facilitateZC3H4-mediated termination by different mechanisms: ARS2 aids substrate targeting and WDR82 mediates RNA polymerase II interaction.ZC3H4 and WDR82 predominantly affect antisense, unstable, and intragenic ncRNAs. We provide an explanation for this by showing that U1 telescripting shields hundreds of protein-coding transcripts from their termination functions.We have defined an expanded ZC3H4 restrictor complex, its principles of action, and how protein-coding transcripts evade it.
2023-07-05 | GSE228288 | GEO
Project description:There are thousands of unstable non-coding (nc) RNAs in humans, but their transcriptional regulation is poorly characterized compared to protein-coding transcripts. We recently identified a restrictor complex containing ZC3H4 and WDR82, which terminates non-coding transcription. Here we show that the ncRNA termination factor, ARS2, and the nuclear exosome targeting complex (NEXT) are part of this complex.ARS2/NEXT and WDR82 contact different parts of ZC3H4, which are required for its transcription regulatory function. They facilitateZC3H4-mediated termination by different mechanisms: ARS2 aids substrate targeting and WDR82 mediates RNA polymerase II interaction.ZC3H4 and WDR82 predominantly affect antisense, unstable, and intragenic ncRNAs. We provide an explanation for this by showing that U1 telescripting shields hundreds of protein-coding transcripts from their termination functions.We have defined an expanded ZC3H4 restrictor complex, its principles of action, and how protein-coding transcripts evade it.
2023-07-05 | GSE228286 | GEO
Project description:Measurement of temperature affects on Arabidopsis transcription and decay rates
| PRJNA230792 | ENA