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A novel anti-RdDM element that defends cis-regulatory element against ncRNA-dependent, siRNA-driven, and methylation-imposed transcriptional silencing in plants [ARE sRNAseq]

ABSTRACT: A novel anti-RdDM element that defends cis-regulatory element against ncRNA-dependent, siRNA-driven, and methylation-imposed transcriptional silencing in plants [ARE sRNAseq]

PROVIDER: PRJNA950093 | ENA |

REPOSITORIES: ENA

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A novel anti-RdDM element that defends cis-regulatory element against ncRNA-dependent, siRNA-driven, and methylation-imposed transcriptional silencing in plants [ARE sRNAseq]

Project description:Cis-regulatory elements (CREs) dictate spatiotemporal expression and tissue specificity of proximal genes. However, when in a transgenic state, many of them become highly vulnerable to RNA-Directed DNA Methylation (RdDM) that is often transcriptionally deleterious and biologically detrimental. This transgene-specific RdDM vulnerability suggests the existence of anti-RdDM elements (AREs) to defend CREs against de novo methylation in vivo. In this work, we identify such an ARE at the Arabidopsis AGAMOUS (AG) locus, which includes a physically separated enhancer and promoter, both of which are highly vulnerable to transgene silencing. We demonstrate that this ARE effectively represses RdDM activity at its cognate and heterologous CREs via the inhibition of transcription and processing of potent non-coding RNAs (ncRNAs), which act as substrates for the biogenesis of 24-nt small interfering RNAs (siRNAs) that guide RdDM. Furthermore, we establish that the ARE exploits hypermethylation in a 108-bp internal region (referred to as M1) as a regulatory signal to recruit methyl reader SU(VAR)3-9 homolog 1 (SUVH1), as well as Harbinger transposon-derived protein 2 (HDP2) associated with HDP1, to carry out ARE-imposed transcriptional and post-transcriptional repression, with the former mediating the repression of ncRNA transcription and the latter repressing both ncRNA transcription and processing. We also show that M1 methylation is indispensable for the repression of methylation in an adjacent, methylation-vulnerable 737-bp region (dubbed M2) to safeguard the ARE’s functional integrity. Taken together, the present study uncovers a novel anti-RdDM element that defends CREs against ncRNA-dependent, siRNA-driven, and methylation-imposed epigenetic interference to safeguard their regulatory integrity.

2023-09-21 | GSE228514 | GEO

A novel anti-RdDM element that defends cis-regulatory element against ncRNA-dependent, siRNA-driven, and methylation-imposed transcriptional silencing in plants [ARE BSseq]

2023-09-21 | GSE228513 | GEO

A novel anti-RdDM element that defends cis-regulatory element against ncRNA-dependent, siRNA-driven, and methylation-imposed transcriptional silencing in plants [ARE ssRNAseq]

2023-09-21 | GSE228515 | GEO

A novel anti-RdDM element that defends cis-regulatory element against ncRNA-dependent, siRNA-driven, and methylation-imposed transcriptional silencing in plants

Project description:A novel anti-RdDM element that defends cis-regulatory element against ncRNA-dependent, siRNA-driven, and methylation-imposed transcriptional silencing in plants

| PRJNA950084 | ENA

A novel anti-RdDM element that defends cis-regulatory element against ncRNA-dependent, siRNA-driven, and methylation-imposed transcriptional silencing in plants [ARE ssRNAseq]

Project description:A novel anti-RdDM element that defends cis-regulatory element against ncRNA-dependent, siRNA-driven, and methylation-imposed transcriptional silencing in plants [ARE ssRNAseq]

| PRJNA950092 | ENA

A novel anti-RdDM element that defends cis-regulatory element against ncRNA-dependent, siRNA-driven, and methylation-imposed transcriptional silencing in plants [ARE BSseq]

Project description:A novel anti-RdDM element that defends cis-regulatory element against ncRNA-dependent, siRNA-driven, and methylation-imposed transcriptional silencing in plants [ARE BSseq]

| PRJNA950094 | ENA

A novel anti-RdDM element that defends cis-regulatory element against ncRNA-dependent, siRNA-driven, and methylation-imposed transcriptional silencing in plants

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

2023-09-21 | GSE228518 | GEO

The MOM1 complex recruits the RdDM machinery via MORC6 to establish de novo DNA methylation.

Project description:MOM1 is an Arabidopsis factor previously shown to mediate transcriptional silencing independent of major DNA methylation changes. Here we found that MOM1 localizes with sites of RNA-directed DNA methylation (RdDM). Tethering MOM1 with artificial zinc finger to unmethylated FWA promoter led to establishment of DNA methylation and FWA silencing. This process was blocked by mutations in components of the Pol V arm of the RdDM machinery, as well as by mutation of MORC6. We found that at some endogenous RdDM sites, MOM1 is required to maintain DNA methylation and a closed chromatin state. In addition, efficient silencing of newly introduced FWA transgenes was impaired by mutation of MOM1 or mutation of genes encoding the MOM1 interacting PIAL1/2 proteins. In addition to RdDM sites, we identified a group of MOM1 peaks at active chromatin near genes that colocalized with MORC6. These findings demonstrate a multifaceted role of MOM1 in genome regulation.

2023-06-10 | PXD039991 | Pride

sRNAseq of Magnaporthe oryzae - Brachypodium distachyon pathosystems

Project description:sRNAseq of Magnaporthe oryzae - Brachypodium distachyon pathosystems

| PRJEB42392 | ENA

The SUVR2 associated proteins FRINGE1 and 2 are required for RdDM in Arabidopsis [Bisulfite-seq]

Project description:DNA methylation in Arabidopsis thaliana is maintained by at least four different enzymes MET1, CMT3, DRM2 and CMT2. However, new methylation patterns are established exclusively by the enzyme DRM2, which acts within a pathway termed RNA-directed DNA methylation (RdDM). Some RdDM components belong to gene families and have partially redundant functions (i.e. DICER LIKE 2, 3 and 4 and IDN2 PARALOG 1 and 2). Traditional screens, which usually affect single genes, usually fail to detect genes if they are redundant, since the loss of one gene is compensated by a related gene. In an effort to circumvent this caveat, we utilized co-expression data to identify closely related genes that are co-regulated with genes in the RdDM pathway. We report the discovery of two redundant proteins, SNF2-RING-HELICASE1 and 2 (FRINGE1 and 2) that are putative chromatin-related paralogous proteins. Analysis of genome–wide bisulfite sequencing shows that simultaneous mutations of FRINGE1 and 2 cause broad defects in methylation at RdDM targeted loci. We also show that FRINGE1 stably associates with Su(var)3-9-related SUVR2, a known RdDM component, in vivo. Combined our results identify FRINGE1 and FRINGE2 as novel components of the RdDM machinery. One fringe 1/2 sample analyzed.

2014-11-25 | E-GEOD-59959 | biostudies-arrayexpress

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