Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

The PFYRE Subdomain in Master Growth Repressor DELLA is Essential for Its Association with Target Chromatin via Histone H2A Binding

ABSTRACT: The DELLA genes encode conserved master growth repressors in plants, and they are also known as ‘Green Revolution’ genes because of their pivotal role in modulating stature of the high-yielding wheat varieties, which were crucial for the success of the ‘Green Revolution’ in the 1960s. At the cellular level, DELLA proteins are nuclear-localized transcription regulators, which play a central role in controlling plant development in response to internal and environmental cues. Recent studies indicate that DELLAs regulate expression of target genes via direct protein-protein interaction of their C-terminal GRAS domain with hundreds of key transcription factors (TFs) and epigenetic regulators. However, the molecular mechanism of DELLA-mediated transcription reprogramming remains unclear. Here, by characterizing missense alleles of an Arabidopsis DELLA, REPRESSOR OF ga1-3 (RGA), we unveil a novel function of the PFYRE subdomain within its GRAS domain for binding to histone H2A via pulldown and co-IP assays. ChIP-Seq analysis further show that this activity is essential for RGA association with its target chromatin globally. Our results indicate that although DELLAs are recruited to target gene promoters by binding to TFs via its LHR1 subdomain, DELLA-H2A interaction via its PFYRE subdomain is necessary to stabilize the TF-DELLA-H2A complex at the target chromatin. This study provides new insight into the two distinct key modular functions in DELLA for its genome-wide transcription regulation in plants. Chromatin immunoprecipitation DNA-sequencing (ChIP-seq) for RGA, rga-11 as well as the negative control sly1 dP and sly1 dQ.

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE220898 | GEO | 2023/06/27

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Similar Datasets

The PFYRE Subdomain in Master Growth Repressor DELLA is Essential for Its Association with Target Chromatin via Histone H2A Binding

Project description:The DELLA genes encode conserved master growth repressors in plants, and they are also known as ‘Green Revolution’ genes because of their pivotal role in modulating stature of the high-yielding wheat varieties, which were crucial for the success of the ‘Green Revolution’ in the 1960s. At the cellular level, DELLA proteins are nuclear-localized transcription regulators, which play a central role in controlling plant development in response to internal and environmental cues. Recent studies indicate that DELLAs regulate expression of target genes via direct protein-protein interaction of their C-terminal GRAS domain with hundreds of key transcription factors (TFs) and epigenetic regulators. However, the molecular mechanism of DELLA-mediated transcription reprogramming remains unclear. Here, by characterizing missense alleles of an Arabidopsis DELLA, REPRESSOR OF ga1-3 (RGA), we unveil a novel function of the PFYRE subdomain within its GRAS domain for binding to histone H2A via pulldown and co-IP assays. ChIP-Seq analysis further show that this activity is essential for RGA association with its target chromatin globally. Our results indicate that although DELLAs are recruited to target gene promoters by binding to TFs via its LHR1 subdomain, DELLA-H2A interaction via its PFYRE subdomain is necessary to stabilize the TF-DELLA-H2A complex at the target chromatin. This study provides new insight into the two distinct key modular functions in DELLA for its genome-wide transcription regulation in plants. The assay for transposase-accessible chromatin using sequencing (ATAC-seq) for RGA vs rga-11 and RGA treated with GA or mock.

2023-06-27 | GSE233124 | GEO

RGA binding sites in Arabidopsis thaliana seedlings

Project description:DELLA proteins act as hubs that relay environmental information to the multiple transcriptional circuits that control growth and development through physical interaction with transcription factors from different families. We have analyzed the presence of one DELLA protein at the Arabidopsis genome by chromatin immunoprecipitation coupled to large-scale sequencing and we find that it binds at the promoters of multiple genes. Enrichment analysis shows a strong preference for cis elements recognized by specific transcription factor families. In particular, we demonstrate that DELLA proteins are recruited by type-B ARABIDOPSIS RESPONSE REGULATORS (ARR) to the promoters of cytokinin-regulated genes, where they act as transcriptional co-activators. The biological relevance of this mechanism is underpinned by the necessity of simultaneous presence of DELLAs and ARRs to restrict root meristem growth and to promote photomorphogenesis. Provided are 3 biological replicates analysing RGA binding sites in Arabidopsis seedlings. ChIP-seq was performed on plants expressing RGA-GFP under the native RGA promoter and on non-transgenic control plants as reference

2015-07-23 | E-GEOD-59187 | biostudies-arrayexpress

RNA-seq of 10-day-old Arabidopsis seedlings of Col-0, cpl3 mutant, and pentuple-della mutant genotype

Project description:C-TERMINAL DOMAIN PHOSPHATASE-LIKE 3 (CPL3) is a phosphatase that interacts with the DELLA proteins RGA and GAI, promoting their function. We examined whether CPL3 is involved in regulating the activity of DELLAs, in particular regarding their function in controlling gene expression. For this purpose, we profiled the transcriptome of the cpl3-3 mutant and compared it with that of the dellap (pentuple della) mutant in the same conditions. 10-day-old plants were used to extract RNA with the miRNeasy Mini Kit (Qiagen). The RNAs were first selected via enrichment of their poly(A) tail and then further fragmented into 300~350 bp fragments to build the libraries. Then, the libraries were sequenced on BGIseq500 platform (BGI, Shenzhen, China), the raw data of FASTQ format were firstly processed through in-house Perl scripts. Next, clean reads were aligned to the Arabidopsis reference genome (TAIR10) using HISAT2. StringTie2 was used to count the reads numbers mapped to each gene and the R package DESeq2was used for differential expression analysis. The principal component analysis (PCA) and Pearson correlation were analyzed by the in-house R Script. All experiments were performed in three biological replicates.

2024-04-18 | E-MTAB-13956 | biostudies-arrayexpress

DELLA protein direct targets in Arabidopsis

2007-11-21 | GSE8741 | GEO

Identification of target genes of the DELLA protein RGL2 during the repression of seed germination

Project description:To shed light on the genetic events downstream of DELLA proteins, we have employed a microarray expression profiling of Arabidopsis thaliana seeds to identify target genes of the DELLA protein RGL2. Seeds of the germinating ga1-3 rga-t2 rgl2-1 and the non-germinating ga1-3 rga-t2 mutant were stratified, and RNA was extracted after five days. Transcript profiles of the non-germinating seeds closely resemble profiles of dormant seeds, and several transcription factors involved in light- and phytohormone-regulated signalling pathways appear to be up-regulated, suggesting that RGL2 controls various physiological aspects to inhibit seed germination. Gene expression five days after stratification was measured in ga1-3 rga-t2 seeds, using seeds of the ga1-3 rga-t2 rgl2-1 mutant as reference. Two biological replicates were performed for each sample.

2012-08-31 | E-GEOD-40485 | biostudies-arrayexpress

Identification of target genes of the DELLA protein RGL2 during the repression of seed germination

2012-08-31 | GSE40485 | GEO

Transcription profiling of Arabidopsis transgenic lines with a gibberellin non responsive DELLA protein vs control to identify DELLA protein direct targets

Project description:The aim of this study is to identify early DELLA protein-responsive genes using a Dexamethasone (DEX)-inducible system. Two transgenic lines were used: one induces the expression of a dominant, gibberellin non-responsive DELLA protein (rga-delta17); the other is a control line that carries the same vector, but lacks the rga-delta17 transgene. By comparing the gene expression changes in the line that expresses the rga-delta17 protein in the presence or absence of DEX it is possible to identify putative targets of DELLA proteins. An empty vector transgenic line was included in this study to identify genes that might be regulated by the DEX inducible system that are not dependent on the DELLA protein. Experiment Overall Design: Seedlings of both transgenic lines were pretreated for 16 h with 2 uM GA4 to enhance gibberellin responses. Because DELLA proteins are strong signaling repressors, this pretreatment should maximize the effect of DELLA induction. Eight-day old seedlings were treated with 2 uM GA4 or a combination of 2 uM GA4 plus 10 uM DEX to induce the rga-delta17 transgene. Three biological replicas for the transgenic line that carries the DEX-inducible rga-delta17 transgene were generated at 2h and 4h. For the empty vector line, only 2 biological replicas were generated at 4h of treatment with 2 uM GA with or without 10 uM DEX.

2008-06-16 | E-GEOD-8741 | biostudies-arrayexpress

Genome-wide binding sites for RGA in Arabidopsis inflorescence apices

Project description:The Arabidopsis thaliana REPRESSOR OF GA gene (RGA) encodes a DELLA protein that associates with multiple transcription factors to control plant growth in response to the hormone gibberellin (GA) (1). As part of a screen for genes that mediate the function of RGA in stem growth and shoot meristem function, we performed ChIP-seq to identify genome-wide loci associated with RGA in inflorescence apices. To detect genes controlled by RGA in a gain-of-function semi-dwarf background, we used a GFP-tagged, gibberellin-insensitive version of RGA (RGAp:GFP-rga-delta17) (2). (1) J.-M. Daviere, P. Achard, Gibberellin signaling in plants. Development 140, 1147-1151 (2013). (2) A. Dill, T. P. Sun, Synergistic derepression of gibberellin signaling by removing RGA and GAI function in Arabidopsis thaliana. Genetics 159, 777-785 (2001).

2017-08-15 | GSE94926 | GEO

Transcriptomic changes upon NaCl treatment dependent on GA biosynthesis and signaling.

Project description:Distinct transcriptome changes upon salt exposure are dependent on DELLA and GA-signaling. We performed RNA-sequencing on mock and NaCl- treated Arabidopsis plants to investigate the role of GA-levels and signaling, in particular DELLAs, on gene expression changes upon salt exposure

2022-02-08 | GSE195912 | GEO

Transcriptomic analysis of regulatory gene expression profiles by DELLA and LEC1 during embryo development in Arabidopsis thaliana.

Project description:To understand how GA functions in regulating embryo development, a genome-wide transcriptomic analysis was carried out using 9DAF seeds dissected from siliques of dellaq (rga28 gai rgl1 rgl2) and the wild-type (col-0-2) grown in full-spectrum white fluorescent light at 22°C under long day conditions (16 h light/8 h dark). Then we found that GA regulates embryo development via DELLA-LEC1interaction, a subsequent genome-wide transcriptomic analysis was carried out using 9DAF seeds dissected from siliques of lec1-4 and the wild-type (col-0-1) in the same growth condition. Basing on the criteria of 1.5-fold cutoff for the genes with 5% false discovery rate, we first identified the differentially expressed genes in dellaq vs col-0-2, lec1-4 vs Col-0-1 subsets, which are referred to as DELLA and LEC1 regulated genes. These data reveal that DELLAs and LEC1 co-target a set of common genes in late embryogenesis, strongly supporting the role of DELLA-LEC1 in embryo development.

2018-02-15 | GSE108544 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

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