Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Characterization of functional relationships of R-loops with gene transcription and epigenetic modifications in rice

ABSTRACT: We conducted genome-wide identification of R-loops followed by integrative analyses of R-loops with relation to gene expressionand epigenetic signatures in the rice genome. We found that the correlation between gene expression levels and profiled R-looppeak levels was dependent on the positions of R-loops within gene structures (hereafter named 'genic position'). Both antisenseonly (ASO)-R-loops and sense/antisense(S/AS)-R-loops sharply peaked around transcription start sites (TSSs), and these peaklevels corresponded positively with transcript levels of overlapping genes. In contrast, sense only (SO)-R-loops were generallyspread over the coding regions, and their peak levels corresponded inversely to transcript levels of overlapping genes. Inaddition, integrative analyses of R-loop data with existing RNA-seq, chromatin-immunoprecipitation (ChIP-seq), deoxyribonucleaseI-seq (DNase-seq) and whole-genome bisulfite sequencing (BS-seq) data revealed interrelationships and intricate connectionsamong R-loops, gene expression and epigenetic signatures. Experimental validation provided evidence that the demethylationof both DNA and histone marks can influence R-loop peak levels on a genome-wide scale. This is the first study in plants thatreveals novel functional aspects of R-loops, their interrelations with epigenetic methylation, and roles in transcriptionalregulation.

ORGANISM(S): Oryza sativa

PROVIDER: GSE111944 | GEO | 2019/03/07

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

A transposon sensor during epigenetic reprogramming consists of pervasive transcription and endosiRNAs in mouse ES cells [RNA-Seq]

Project description:DNA methylation and other repressive epigenetic marks are erased genome-wide in mammalian primordial germ cells (PGCs), the early embryo and in naïve embryonic stem cells (ESCs). This is a critical phase for transposon element (TE) defense since presumably alternative pathways need to be employed to limit their activity. It has been reported that pervasive transcription is enriched for TEs in ESCs in comparison to somatic cells. Here we test the hypothesis that pervasive transcription overlapping TEs forms a sensor for loss of their transcriptional repression. Overlapping sense and antisense transcription is found in TEs, and the increase of sense transcription induced by acute deletion of DNMT1 leads to the emergence of small RNAs. These small RNAs are loaded into ARGONAUTE 2 suggesting an endosiRNA mechanism for transposon silencing. Indeed, deletion of DICER reveals this mechanism to be important for silencing of certain transposon classes, while others are additionally repressed by deposition of repressive histone marks. Our observations suggest that pervasive transcription overlapping with TEs resulting in endosiRNAs is a transposon sensor that restrains their activity during epigenetic reprogramming in the germline.

2017-11-01 | GSE89695 | GEO

A transposon sensor during epigenetic reprogramming consists of pervasive transcription and endosiRNAs in mouse ES cells [ChIP-Seq]

2017-11-01 | GSE89694 | GEO

A transposon sensor during epigenetic reprogramming consists of pervasive transcription and endosiRNAs in mouse ES cells [BS-Seq]

2017-11-01 | GSE89697 | GEO

A transposon sensor during epigenetic reprogramming consists of pervasive transcription and endosiRNAs in mouse ES cells [smallRNA-Seq]

2017-11-01 | GSE89696 | GEO

Genome-wide maps of R-loops in Arabidopsis

Project description:Inspired by the important roles of the special chromatin structure R-loops, here we report a new method, ssDRIP-seq, for genome-wide identification of R-loops, and demonstrate its high efficiency, low bias, and strand-specificity when profiling the R-loops in Arabidopsis. Using this single-strand DNA ligation based library construction technique, we find that Arabidopsis R-loops are formed in both the sense and antisense orientations of genes, and prefer both AT and GC skews. R-loops are prevalent in regions with multiple chromatin modifications, and are negatively correlated with CG DNA hypermethylation. R-loops are strongly enriched in gene promoters and gene bodies, highly associated with noncoding RNA and repetitive genomic regions, and correlated with activated and repressed gene loci. In summary, our analysis reveals that R-loop is a common feature of the Arabidopsis genome, and suggests diverse roles for R-loops in genome organization and gene regulation, thereby providing novel insights into plant nuclear genome formation and function.

2017-05-31 | GSE95765 | GEO

Pervasive transcription and endosiRNAs restrain transposons during global demethylation in embryonic stem cells [smallRNA-Seq 2]

Project description:DNA methylation and other repressive epigenetic marks are erased in the mammalian germline and transposable elements (TEs) acquire the potential to be transcribed. This is a critical phase for genome defense and complementary TE silencing pathways are required to limit their activity. We find overlapping sense/antisense transcription in TEs in mouse embryonic stem cells, with an increase of sense transcription induced by acute deletion of Dnmt1, leading to increased abundance of small RNAs. These small RNAs are loaded into ARGONAUTE2 (AGO2) suggesting an endosiRNA based silencing mechanism. Reduction of Dicer and Ago2 levels reveals that small RNAs are involved in an immediate response to transposon activation by demethylation, while the deposition of repressive histone marks represents an ensuing chronic response. Dicer dependent endosiRNAs which map to TEs are also found in vivo during primordial germ cell development. Our results suggest that TE antisense transcription acts as a trap that restrains acute transposon activity through small RNAs during epigenetic reprogramming in the germline.

2017-11-01 | GSE102447 | GEO

Pervasive transcription and endosiRNAs restrain transposons during global demethylation in embryonic stem cells [RNA-Seq 2]

2017-11-01 | GSE102446 | GEO

Pervasive transcription and endosiRNAs restrain transposons during global demethylation in embryonic stem cells [ChIP-Seq 2]

2017-11-01 | GSE102445 | GEO

R-loops act as a master regulatory switch modulating transcription of cold-responsive genes in rice

Project description:Cold is a major naturally occurring stress that usually causes complex symptoms and severe yield loss in plants. R-loops can function in a series of biological processes, including normal development and stress responses, in plants. However, how R-loops function in cold responses is still largely unknown in plants, especially in cold sensitive rice. Herein, we conducted DRIP-seq in combination with other newly generated omics data (RNA-seq, DNase-seq, ChIP-seq and MNase-seq) in rice with or without cold treatment. We found that cold treatment caused R-loop dynamics across the genome, indicating that R-loops are cold sensitive non-B DNA structures. Moreover, cold biased R-loops had high GC content and novel motifs the binding of distinct TFs as compared to CK biased R-loops, indicative of occurrence of differential biological implications of R-loop dynamics in response to cold stress. More importantly, we for the first time to provide evidence showing that, in addition to the direct involvement of R-loops in the regulation of cold-responsive gene transcription, R-loops can indirectly modulate transcription of subsets of cold-responsive genes through R-loop overlapping TF-centered or cis-regulatory element related regulatory networks and lncRNAs in rice. Thus, our study for the first time provides evidence showing functions of R-loop dynamics in rice cold responses. It also provides some potential R-loop loci for genetic and epigenetic manipulation towards breeding of enhanced cold tolerance rice varieties.

2023-09-26 | GSE217841 | GEO

Transcriptome and methylome interactions in rice hybrids

Project description:This research reports genome-wide measurements of genetic and epigenetic patterns of inheritance through an integrative analysis of BS-seq, RNA-seq, and siRNA-seq data in two inbred parents of the Nipponbare (NPB) and Indica (93-11) variety of rice and their hybrid offspring. We generated integrative maps of whole genome cytosine methylation profiles (BS-Seq), transcriptional profiles (RNA-seq), and small RNA profiles (sRNA-seq) to characterize two rice subspecies, Oryza sativa spp japonica (Nipponbare) and Oryza sativa spp indica (93-11) and their two reciprocal hybrid offspring using Illumina's sequencing-by-synthesis (SBS) platform .

2012-07-10 | E-GEOD-38480 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data