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Minor splicing factor 65K/RNPC3 interacts with ANKRD11 and mediates HDAC3-regulated histone deacetylation and transcription

ABSTRACT: Minor splicing factor 65K/RNPC3 interacts with ANKRD11 and mediates HDAC3-regulated histone deacetylation and transcription

PROVIDER: PRJNA1019690 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26140012_1.fastq.gz	Fastqsanger.gz
	SRR26140012_2.fastq.gz	Fastqsanger.gz
	SRR26140013_1.fastq.gz	Fastqsanger.gz
	SRR26140013_2.fastq.gz	Fastqsanger.gz
	SRR26140014_1.fastq.gz	Fastqsanger.gz

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Minor splicing factor 65K/RNPC3 interacts with ANKRD11 and mediates HDAC3-regulated histone deacetylation and transcription

Project description:Pre-mRNA splicing is coupled with DNA- and other RNA-processing machineries in the nucleus to form multilayer networks for accurate regulation of gene expression. However, those established couplings are major spliceosome-related, whether the minor spliceosome is involved remains unclear. Here, we first identified a direct interaction between a minor-specific protein 65K/RNPC3 and the histone deacetylase HDAC3 cofactor ANKRD11 through affinity co-purification using Drosophila lysate. In vivo assays revealed that the head of both DmAnkrd11Δ/Δ and Dm65KΔ/Δ mutants exhibited increased histone acetylation at H3K9 and H4K5, consistent with the high level of ANKRD11 in the central nervous systems. We then found that the 65K-ANKRD11 interaction is conserved in human, in which the HsANKRD11 middle-stretched domain mediates Hs65K association with HDAC3. CUT&Tag assays demonstrated that HDAC3 and Hs65K synergistically bind on chromatin, and the knockdown of ANKRD11 simultaneously decreased their bindings at the same chromatin locations and also increased nearby acetylation of H3K9. Sequencing of mRNAs revealed that the deficiency of HsANKRD11 or Hs65K caused changes in gene expression correlated with their chromatin-binding changes of HDAC3 and Hs65K and the levels of H3K9ac. This study provides a novel strategy for the regulation of histone deacetylation and gene expression through a minor spliceosome-specific component.

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Minor Spliceosomal 65K/RNPC3 Interacts with ANKRD11 and Mediates HDAC3-Regulated Histone Deacetylation and Transcription.

Project description:RNA splicing is crucial in the multilayer regulatory networks for gene expression, making functional interactions with DNA- and other RNA-processing machineries in the nucleus. However, these established couplings are all major spliceosome-related; whether the minor spliceosome is involved remains unclear. Here, through affinity purification using Drosophila lysates, an interaction is identified between the minor spliceosomal 65K/RNPC3 and ANKRD11, a cofactor of histone deacetylase 3 (HDAC3). Using a CRISPR/Cas9 system, Deletion strains are constructed and found that both Dm65KΔ/Δ and Dmankrd11Δ/Δ mutants have reduced histone deacetylation at Lys9 of histone H3 (H3K9) and Lys5 of histone H4 (H4K5) in their heads, exhibiting various neural-related defects. The 65K-ANKRD11 interaction is also conserved in human cells, and the HsANKRD11 middle-uncharacterized domain mediates Hs65K association with HDAC3. Cleavage under targets and tagmentation (CUT&Tag) assays revealed that HsANKRD11 is a bridging factor, which facilitates the synergistic common chromatin-binding of HDAC3 and Hs65K. Knockdown (KD) of HsANKRD11 simultaneously decreased their common binding, resulting in reduced deacetylation of nearby H3K9. Ultimately, this study demonstrates that expression changes of many genes caused by HsANKRD11-KD are due to the decreased common chromatin-binding of HDAC3 and Hs65K and subsequently reduced deacetylation of H3K9, illustrating a novel and conserved coupling mechanism that links the histone deacetylation with minor spliceosome for the regulation of gene expression.

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CPSF6-RARγ Interacts with HDAC3 to Promote Myeloid Transformation

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CPSF6-RARγ Interacts with HDAC3 to Promote Myeloid Transformation [RNA-seq]

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Nuclear Receptor Corepressors are Required for the Histone Deacetylase Activity of HDAC3 In Vivo

Project description:Histone deacetylase 3 (HDAC3) is an epigenome-modifying enzyme that is required for normal mouse development and tissue-specific functions. In vitro, HDAC3 protein itself has minimal enzyme activity, but gains its histone deacetylation function from stable association with the conserved deacetylase activation domain (DAD) contained in nuclear receptor corepressors NCOR1 and SMRT. Here we show that HDAC3 enzyme activity is undetectable in mice bearing point mutations in the DAD of both NCOR1 and SMRT (NS-DADm), despite normal levels of HDAC3 protein. Local histone acetylation is increased, and genomic HDAC3 recruitment is reduced though not abrogated. Remarkably, the NS-DADm mice are born and live to adulthood, whereas genetic deletion of HDAC3 is embryonic lethal. These findings demonstrate that nuclear receptor corepressors are required for HDAC3 enzyme activity in vivo, and suggest that a deacetylase-independent function of HDAC3 may be required for life. This SuperSeries is composed of the SubSeries listed below. Refer to individual Series.

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Drosophila Ebi mediates Snail-dependent transcriptional repression through HDAC3-induced histone deacetylation.

Project description:The Drosophila Snail protein is a transcriptional repressor that is necessary for mesoderm formation. Here, we identify the Ebi protein as an essential Snail co-repressor. In ebi mutant embryos, Snail target genes are derepressed in the presumptive mesoderm. Ebi and Snail interact both genetically and physically. We identify a Snail domain that is sufficient for Ebi binding, and which functions independently of another Snail co-repressor, Drosophila CtBP. This Ebi interaction domain is conserved among all insect Snail-related proteins, is a potent repression domain and is required for Snail function in transgenic embryos. In mammalian cells, the Ebi homologue TBL1 is part of the NCoR/SMRT-HDAC3 (histone deacetylase 3) co-repressor complex. We found that Ebi interacts with Drosophila HDAC3, and that HDAC3 knockdown or addition of a HDAC inhibitor impairs Snail-mediated repression in cells. In the early embryo, Ebi is recruited to a Snail target gene in a Snail-dependent manner, which coincides with histone hypoacetylation. Our results demonstrate that Snail requires the combined activities of Ebi and CtBP, and indicate that histone deacetylation is a repression mechanism in early Drosophila development.

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