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Methyl-CpG-binding domain 9 (MBD9) is required for H2A.Z incorporation into chromatin at a subset of H2A.Z-enriched regions in the Arabidopsis genome

ABSTRACT: Methyl-CpG-binding domain 9 (MBD9) is required for H2A.Z incorporation into chromatin at a subset of H2A.Z-enriched regions in the Arabidopsis genome

PROVIDER: PRJNA481969 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7542710.fastq.gz	Fastqsanger.gz
	SRR7542720.fastq.gz	Fastqsanger.gz
	SRR7542711.fastq.gz	Fastqsanger.gz
	SRR7542721.fastq.gz	Fastqsanger.gz
	SRR7542712.fastq.gz	Fastqsanger.gz

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Methyl-CpG-binding domain 9 (MBD9) is required for H2A.Z incorporation into chromatin at a subset of H2A.Z-enriched regions in the Arabidopsis genome

Project description:The SWR1 chromatin remodeling complex, which deposits the histone variant H2A.Z into nucleosomes, has been characterized in yeast and animals but had not been purified from plants. We used the conserved SWR1 subunit ACTIN RELATED PROTEIN 6 (ARP6) as bait in tandem affinity purification experiments to isolate associated proteins from Arabidopsis thaliana. We identified all 11 subunits found in yeast SWR1 and the homologous mammalian SRCAP complexes, demonstrating that this complex is conserved in plants. We also identified several additional proteins not previously associated with SWR1, including Methyl-CpG-BINDING DOMAIN 9 (MBD9). Since mbd9 mutant plants were phenotypically similar to arp6 mutants, we further explored a potential role for MBD9 in H2A.Z deposition. We found that MBD9 is required for proper H2A.Z incorporation at thousands of discrete sites, which represent a subset of the regions normally enriched with H2A.Z. Genetic analyses showed that arp6;mbd9 double mutants have far more severe phenotypes than either single mutant. In conjunction with the finding that MBD9 does not appear to be a core subunit of the Arabidopsis SWR1 complex, this suggests that MBD9 also has important roles beyond H2A.Z deposition. Our data establish the SWR1 complex as being conserved across eukaryotes and also provide new insights into the mechanisms that target H2A.Z to chromatin.

2018-08-31 | GSE117391 | GEO

Arabidopsis SWR1-associated protein methyl-CpG-binding domain 9 is required for histone H2A.Z deposition. [ChIPSeq_MBD9]

Project description:Deposition of histone variant H2A.Z by the SWR1 chromatin-remodeling complex is critical for the appropriate expression of many genes in eukaryotes, yet, despite its importance, the composition of the Arabidopsis SWR1 complex has not been thoroughly analyzed. Here we have identified the interacting partners of a conserved Arabidopsis SWR1 subunit, actin-related protein 6 (ARP6). We isolated 9 predicted components, identifying subunits implicated in histone acetylation and interacting partners implicated in chromatin biology. We found that the methyl-CpG-binding domain 9 (MBD9) subunit functioned synergistically with ARP6 to control flowering time. MBD9, in combination with ARP6, was involved in the SWR1-mediated incorporation of the majority of H2A.Z. MBD6 was further required for deposition of H2A.Z at a distinct subset of loci. MBD9 was preferentially bound to nucleosome-depleted regions at the 5’ of genes containing high levels of activating histone marks. Our data suggests a model for MBD9 in recruiting the SWR1 complex to open chromatin of actively transcribing genes.

2019-06-21 | GSE123261 | GEO

Arabidopsis SWR1-associated protein methyl-CpG-binding domain 9 is required for histone H2A.Z deposition. [ChIPSeq_H3Ac]

2019-06-21 | GSE123260 | GEO

Arabidopsis SWR1-associated protein methyl-CpG-binding domain 9 is required for histone H2A.Z deposition. [ChIPSeq_H2AZ]

2019-06-21 | GSE123259 | GEO

Arabidopsis SWR1-associated protein methyl-CpG-binding domain 9 is required for histone H2A.Z deposition. [RNA-Seq]

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Arabidopsis SWR1-associated protein methyl-CpG-binding domain 9 is required for histone H2A.Z deposition. [ATAC-Seq]

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Methyl-CpG-binding domain 9 (MBD9) is required for H2A.Z incorporation into chromatin at a subset of H2A.Z-enriched regions in the Arabidopsis genome.

Project description:The SWR1 chromatin remodeling complex, which deposits the histone variant H2A.Z into nucleosomes, has been well characterized in yeast and animals, but its composition in plants has remained uncertain. We used the conserved SWR1 subunit ACTIN RELATED PROTEIN 6 (ARP6) as bait in tandem affinity purification experiments to isolate associated proteins from Arabidopsis thaliana. We identified all 11 subunits found in yeast SWR1 and the homologous mammalian SRCAP complexes, demonstrating that this complex is conserved in plants. We also identified several additional proteins not previously associated with SWR1, including Methyl-CpG-BINDING DOMAIN 9 (MBD9) and three members of the Alfin1-like protein family, all of which have been shown to bind modified histone tails. Since mbd9 mutant plants were phenotypically similar to arp6 mutants, we explored a potential role for MBD9 in H2A.Z deposition. We found that MBD9 is required for proper H2A.Z incorporation at thousands of discrete sites, which represent a subset of the genomic regions normally enriched with H2A.Z. We also discovered that MBD9 preferentially interacts with acetylated histone H4 peptides, as well as those carrying mono- or dimethylated H3 lysine 4, or dimethylated H3 arginine 2 or 8. Considering that MBD9-dependent H2A.Z sites show a distinct histone modification profile, we propose that MBD9 recognizes particular nucleosome modifications via its PHD- and Bromo-domains and thereby guides SWR1 to these sites for H2A.Z deposition. Our data establish the SWR1 complex as being conserved across eukaryotes and suggest that MBD9 may be involved in targeting the complex to specific genomic sites through nucleosomal interactions. The finding that MBD9 does not appear to be a core subunit of the Arabidopsis SWR1 complex, along with the synergistic phenotype of arp6;mbd9 double mutants, suggests that MBD9 also has important roles beyond H2A.Z deposition.

| S-EPMC6695207 | biostudies-literature

Chromatin-remodeling factor OsINO80 regulate H2A.Z incorporation [anti-H2A.Z & H3 ChIP-seq]

Project description:Chromatin-remodeling factor OsINO80 regulate H2A.Z incorporation [anti-H2A.Z & H3 ChIP-seq]

| PRJNA753508 | ENA

Arabidopsis SWR1-associated protein methyl-CpG-binding domain 9 is required for histone H2A.Z deposition.

Project description:Arabidopsis SWR1-associated protein methyl-CpG-binding domain 9 is required for histone H2A.Z deposition.

| PRJNA507977 | ENA

Arabidopsis SWR1-associated protein methyl-CpG-binding domain 9 is required for histone H2A.Z deposition. [ChIPSeq_H3Ac]

Project description:Arabidopsis SWR1-associated protein methyl-CpG-binding domain 9 is required for histone H2A.Z deposition. [ChIPSeq_H3Ac]

| PRJNA507981 | ENA