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A novel BRAT1–BRP1 complex recognizes histone acetylation and mediates active DNA demethylation and transcriptional activation in Arabidopsis [RNA-Seq]

ABSTRACT: To identify BRAT1 target loci at the whole-genome level, we performed RNA deep sequencing and examined the transcript levels of transposable elements and genes in the wild type, brat1, nrpe1, and brat1nrpe1.

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE67797 | GEO | 2015/04/14

SECONDARY ACCESSION(S): PRJNA280957

REPOSITORIES: GEO

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A novel BRAT1–BRP1 complex recognizes histone acetylation and mediates active DNA demethylation and transcriptional activation in Arabidopsis [RNA-Seq]

Project description:To identify BRAT1 target loci at the whole-genome level, we performed RNA deep sequencing and examined the transcript levels of transposable elements and genes in the wild type, brat1, nrpe1, and brat1nrpe1. Compare the mRNA profiles of 10-day old seedlings materials of mutants (brat1, nrpe1, and brat1nrpe1) to wild type by Illumina suquencing.

2015-04-14 | E-GEOD-67797 | biostudies-arrayexpress

A novel BRAT1-BRP1 complex recognizes histone acetylation and mediates active DNA demethylation and transcriptional activation in Arabidopsis

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2015-04-14 | E-GEOD-67799 | biostudies-arrayexpress

A novel BRAT1-BRP1 complex recognizes histone acetylation and mediates active DNA demethylation and transcriptional activation in Arabidopsis

Project description:This SuperSeries is composed of the SubSeries listed below.

2015-04-14 | GSE67799 | GEO

A novel BRAT1–BRP1 complex recognizes histone acetylation and mediates active DNA demethylation and transcriptional activation in Arabidopsis [BS-Seq]

Project description:Active DNA demethylation is an important epigenetic phenomenon in many eukaryotes. In Arabidopsis thaliana, ROS1, a 5-methylcytosine DNA glycosylase, is responsible for active DNA demethylation via a base excision repair process. Here, we found that Bromodomain and ATPase domain-containing protein 1 (BRAT1) associates with BRP1 (BRAT1 Partner 1) and forms a tight BRAT1–BRP1 complex required for DNA demethylation. To identify hypermethylated loci at the whole-genome level in brat1, brp1, and ros1, we performed whole-genome bisulfite sequencing. Compare the DNA methylation profiles of 10-day old seedlings materials of mutants (brat1, brp1, and ros1) to wild type by whole-genome bisulfite sequencing.

2015-04-14 | E-GEOD-67798 | biostudies-arrayexpress

A novel BRAT1–BRP1 complex recognizes histone acetylation and mediates active DNA demethylation and transcriptional activation in Arabidopsis [BS-Seq]

2015-04-14 | GSE67798 | GEO

Histone acetylation recruits the SWR1 complex to regulate active DNA demethylation in <i>Arabidopsis</i>.

Project description:Active DNA demethylation is critical for controlling the DNA methylomes in plants and mammals. However, little is known about how DNA demethylases are recruited to target loci, and the involvement of chromatin marks in this process. Here, we identify 2 components of the SWR1 chromatin-remodeling complex, PIE1 and ARP6, as required for ROS1-mediated DNA demethylation, and discover 2 SWR1-associated bromodomain-containing proteins, AtMBD9 and nuclear protein X1 (NPX1). AtMBD9 and NPX1 recognize histone acetylation marks established by increased DNA methylation 1 (IDM1), a known regulator of DNA demethylation, redundantly facilitating H2A.Z deposition at IDM1 target loci. We show that at some genomic regions, H2A.Z and DNA methylation marks coexist, and H2A.Z physically interacts with ROS1 to regulate DNA demethylation and antisilencing. Our results unveil a mechanism through which DNA demethylases can be recruited to specific target loci exhibiting particular histone marks, providing a conceptual framework to understand how chromatin marks regulate DNA demethylation.

| S-EPMC6697875 | biostudies-literature

A novel BRAT1-BRP1 complex recognizes histone acetylation and mediates active DNA demethylation and transcriptional activation in Arabidopsis

Project description:A novel BRAT1-BRP1 complex recognizes histone acetylation and mediates active DNA demethylation and transcriptional activation in Arabidopsis

| PRJNA280955 | ENA

Histone acetylation recruits the SWR1 complex to regulate active DNA demethylation in Arabidopsis

Project description:The eukaryotic genome is divided into regions of heterochromatin and euchromatin. The histone variant H2A.Z specifically localizes at euchromatin and displays a genome-wide anti-correlation with DNA methylation. DNA methylation plays a central role in the epigenetic regulation of many eukaryotic genomes. Active DNA demethylation is critical for controlling the epigenome in plants and mammals. Yet, little is known about how DNA demethylases are recruited to target loci. Here we report that SWR1, a conserved histone H2A.Z deposition complex, regulates DNA demethylation in Arabidopsis thaliana by recruiting the plant DNA demethylase ROS1. A forward genetic screen for anti-silencing mutants identified two SWR1 components, PIE1 and ARP6, as cellular factors required for ROS1-mediated DNA demethylation. We further discovered two bromodomain-containing proteins, the methyl-DNA-binding protein AtMBD9, and NPX1, a plant homolog of ScBDF1 in yeast, as components of the SWR1 complex in Arabidopsis. AtMBD9 and NPX1 function redundantly in preventing DNA hypermethylation and transcriptional gene silencing by recognizing histone acetylation marks established by IDM1, a known regulator of DNA demethylation. We show that IDM1 is required for H2A.Z deposition in many genomic regions targeted for active DNA demethylation. We found that H2A.Z interacts with ROS1 and is required for locus-specific DNA demethylation and antisilencing. Our results reveal a role of H2A.Z in active DNA demethylation, and a mechanism through which DNA demethylases can be recruited to target regions by specific histone acetylation marks.

2019-08-01 | GSE115170 | GEO

The SWR1 Complex Regulates Active DNA Demethylation in Arabidopsis

Project description:Using BS-Seq to provide single-base resolution of DNA methylation status in 35S-SUC2 WT and antisilencing mutants (arp6, pie1, h2a.z, idm1, and ros1)

2020-12-06 | GSE107751 | GEO

Expression analysis of Arabidopsis thaliana wild-type Col-0 and selected RNA silencing mutant plants

Project description:Investigation of whole genome gene expression level changes in several Arabidopsis thaliana mutants (nrpd1, nrpe1, ros1 dml2 dml3) compared to wild-type Col-0. The mutants analyzed in this study are further described in Le et al. 'DNA demethylases target promoter transposable elements to positively regulate stress responsive genes in Arabidopsis' . Genome Biology (in press).

2014-08-20 | GSE60508 | GEO

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