Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

The histone modifier KDM5 functions as an insulator [Hi-C]

ABSTRACT: KDM5 family proteins are best known for their demethylation of the promoter proximal chromatin mark H3K4me3. KDM5-regulated transcription is critical in the brain, with variants in the X-linked paralog KDM5C causing the intellectual disability (ID) disorder, Claes-Jensen syndrome. Although the demethylase activity of KDM5C is known to be important for neuronal function, the contribution of non-enzymatic activities remains less characterized. We therefore used Drosophila to model the ID variant Kdm5L854F that disrupts a C5HC2 zinc finger adjacent to the enzymatic JmjC domain. Kdm5L854F causes similar transcriptional changes in the brain to a demethylase dead strain, Kdm5JmjC*, despite having little effect on enzymatic activity. KDM5L854F is also distinct from KDM5JmjC* in its reduced interactions with insulator proteins and enhancement of position effect variegation. Instead, the common transcriptional deficits likely result from both the JmjC and C5HC2 domains driving proper genomic organization through their activity in promoting proper loop architecture.

ORGANISM(S): Drosophila melanogaster

PROVIDER: GSE282536 | GEO | 2025/06/01

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

The histone modifier KDM5 functions as an insulator [Targeted DamID]

Project description:KDM5 family proteins are best known for their demethylation of the promoter proximal chromatin mark H3K4me3. KDM5-regulated transcription is critical in the brain, with variants in the X-linked paralog KDM5C causing the intellectual disability (ID) disorder, Claes-Jensen syndrome. Although the demethylase activity of KDM5C is known to be important for neuronal function, the contribution of non-enzymatic activities remains less characterized. We therefore used Drosophila to model the ID variant Kdm5L854F that disrupts a C5HC2 zinc finger adjacent to the enzymatic JmjC domain. Kdm5L854F causes similar transcriptional changes in the brain to a demethylase dead strain, Kdm5JmjC*, despite having little effect on enzymatic activity. KDM5L854F is also distinct from KDM5JmjC* in its reduced interactions with insulator proteins and enhancement of position effect variegation. Instead, the common transcriptional deficits likely result from both the JmjC and C5HC2 domains driving proper genomic organization through their activity in promoting proper loop architecture.

2025-06-01 | GSE282537 | GEO

The histone modifier KDM5 functions as an insulator [CUT&RUN]

2025-06-01 | GSE282535 | GEO

The histone modifier KDM5 functions as an insulator [ATAC-seq]

2025-06-01 | GSE282534 | GEO

Sexually Dimorphic Alterations in the Transcriptome and Behavior with Loss of Histone Demethylase KDM5C

Project description:Chromatin dysregulation has emerged as a major hallmark of neurodevelopmental disorders such as intellectual disability (ID) and autism spectrum disorders (ASD). The prevalence of ID and ASD is higher in males compared to females, with un-known mechanisms. Intellectual developmental disorder, X-linked syndromic, Claes-Jensen type (MRXSCJ), is caused by loss-of-function mutations of lysine de-methylase 5C (KDM5C), a histone H3K4 demethylase gene. KDM5C escapes X-inactivation, thereby presenting at a higher level in females. Initially, MRXSCJ was exclusively reported in males, while it is increasingly evident that females with heterozygous KDM5C mutations can show cognitive deficits. The mouse model of MRXSCJ, male Kdm5c-hemizygous knockout animals, recapitulates key features of human male patients. However, the behavioral and molecular traits of Kdm5c-heterozygous female mice remain incompletely characterized. Here, we re-port that gene expression and behavioral abnormalities are readily detectable in Kdm5c-heterozygous female mice, demonstrating the requirement for a higher KDM5C dose in females. Furthermore, we found both shared and sex-specific con-sequences of a reduced KDM5C dose in social behavior, gene expression, and ge-netic interaction with the counteracting enzyme KMT2A. These observations pro-vide an essential insight into the sex-biased manifestation of neurodevelopmental disorders and sex chromosome evolution.

2023-02-15 | GSE206346 | GEO

RNA-seq analyses of kdm5[A512P] and enzymatically inactive kdm5[JmjC*] in adult heads

Project description:The goal of this study was to generate a Drosophila model of intellectual disability caused by mutations in kdm5. RNA-seq was used to define the transcriptional defects of a mutation in Drosophila that is analogous to a human intellectual disability-associated allele, kdm5[A512p]. These data revealed a total of 1609 dysregulated genes, 778 of which were upregulated and 831 were downregulated. To determine whether these transcriptional defects were due to the loss of KDM5-induced histone demethylation, we also carried out RNA-seq from a enzymatic inactive strain, kdm5[Jmjc*]. These data revealed a striking similarity between the two datasets and suggest that the primary defect of KDM5[A512P] is loss of histone demethylase activity.

2018-12-31 | GSE100578 | GEO

KDM5-mediated transcriptional activation of ribosomal protein genes alters translation efficiency to regulate mitochondrial metabolism

Project description:Genes encoding the KDM5 family of transcriptional regulators are disrupted in individuals with intellectual disability (ID). To understand the link between KDM5 and ID, we generated five Drosophila strains harboring missense alleles analogous to those observed in patients. These alleles showed effects on neuroanatomical development, cognition, and other behaviors, in addition to a transcriptional signature that included the downregulation of many ribosomal protein genes. A similar transcriptional profile was observed in KDM5C knockout human glutamatergic neurons derived from induced pluripotent stem cells (iPSCs), suggesting a conserved role for KDM5 proteins in regulating ribosomal protein genes. Quantifying changes to the translatome caused by reduced KDM5 in Drosophila neurons, we find that the translation of mRNAs required for mitochondrial activity was particularly affected. Altered mitochondrial activity was confirmed through metabolomic studies that revealed decreased citric acid cycle activity. KDM5 therefore plays a key role in maintaining mitochondrial function that, when altered, could contribute to cognitive and behavioral phenotypes.

2023-11-14 | PXD046963 | Pride

DNA methylation fingerprint of a KDM5C loss-of-function mutation in patients with intellectual disability

Project description:Characterization of methylation changes related do KDM5C c.807delC (p.V271X) Mutations in KDM5C (lysine (K)-specific demethylase 5C) were associated to up to 3% of the X-linked ID cases. Males carrying KDM5C mutations present reduced activity of the KDM5C protein, increasing H3K4 tri-methylation, which ultimately leads to up-regulation of KDM5C target genes. Whole-exome sequencingi n one of three brothers with intellectual disability followed by confirmation by Sanger sequencing in the family identified a frameshift mutation in the KDM5C exon 7 that devoid of the JmjC catalytic domain from the protein. Two other brothers also presenting intellectual disability as well as in their clinically normal mother, who had completely skewed X-inactivation also had the mutation. An empirical Bayesian analysis of methylation levels between cases and controls identified 399 differentially methylated positions, 288 hypomethylated and 111 hypermethylated.Among the genes associated with the hypomethylated CpGs were FBXL5 and CACYBP, both involved in the ubiquitination pathway.

2018-11-30 | GSE108423 | GEO

NO001: Kdm5c controls promoter and enhancer activities

Project description:The functional organization of eukaryotic genomes correlates with specific patterns of histone methylations. Regulatory regions in genomes like enhancers and promoters differ in their extent of methylation of histone H3 at lysine-4 (H3K4), but it is largely unknown how the different methylation states are specified and controlled. Here, we show that the Kdm5c/Jarid1c/SMCX member of the Kdm5 family of H3K4 demethylases can be recruited to both enhancer and promoter elements in embryonic stem cells and neuronal progenitor cells via gene-specific transcription factors. Knockdown of Kdm5c deregulates transcription via local increases in H3K4me3. Our data show that restricting H3K4me3 modification at core promoters dampens transcription, but Kdm5c is required at enhancers for their full activity. Remarkably, an impaired enhancer function activates the intrinsic promoter activity of Kdm5c-bound distal elements. Our results demonstrate that the Kdm5c demethylase plays a crucial and dynamic role in the functional discrimination between enhancers and core promoters. RNA from four independent cultures from each sh Kdm5c #1, sh Kdm5c #2 and non-targeting shRNA polyclonal cell lines were hybridized in dye-swap against a common reference of RNA from IB10 ES cells.

2013-04-05 | E-GEOD-38862 | biostudies-arrayexpress

Targeting transcriptional factor YY1 is synthetic lethal with loss of the histone demethylase KDM5C

Project description:In this study, we screened KDM5C-binding proteins and found that Yin Yang 1 (YY1) interacts with KDM5C. Interestingly, a synergistic antitumor effect was exerted when both KDM5C and YY1 were depleted, and targeting YY1 appeared to be a vulnerability in KDM5C-deficient cancer cells. Mechanistically, KDM5C is essential for global YY1 chromatin recruitment, especially at promoters. Moreover, an intact KDM5C JmjC domain but not KDM5C histone demethylase activity is required for KDM5C-mediated YY1 chromatin binding.Transcriptional profiling revealed that dual inhibition of KDM5C and YY1 led to significantly increased transcriptional repression of many cell cycle- and apoptosis-related genes. In summary, our work demonstrates a synthetic lethal interaction between YY1 and KDM5C and suggests a therapeutic vulnerability that can be targeted using combination therapies.

2024-06-28 | GSE270719 | GEO

Targeting transcriptional factor YY1 is synthetic lethal with loss of the histone demethylase KDM5C [CUT&Tag]

2024-09-02 | GSE275838 | GEO