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Site-specific methylation of Notch1 controls the amplitude and duration of the Notch1 response

ABSTRACT: Physiologically, Notch signal transduction plays a pivotal role in differentiation; pathologically, Notch signaling contributes to the development of cancer. Transcriptional activation of Notch target genes involves cleavage of the Notch receptor in response to ligand binding, production of the Notch intracellular domain (NICD), and NICD migration into the nucleus and assembly of a coactivator complex. Posttranslational modifications of the NICD are important for its transcriptional activity and protein turnover. Deregulation of Notch signaling and stabilizing mutations of Notch1 have been linked to leukemia development. We found that the methyltransferase CARM1 (coactivator-associated arginine methyltransferase 1; also known as PRMT4) methylated NICD at five conserved arginine residues within the C-terminal transactivation domain. CARM1 physically and functionally interacted with the NICD-coactivator complex and was found at gene enhancers in a Notch-dependent manner. Although a methylation-defective NICD mutant was biochemically more stable, this mutant was biologically less active as measured with Notch assays in embryos of Xenopus laevis and Danio rerio. Mathematical modeling indicated that full but short and transient Notch signaling required methylation of NICD. Analysis of gene expression upon inactivation and activation of Notch signaling in Beko cells.

ORGANISM(S): Mus musculus

PROVIDER: GSE62528 | GEO | 2015/03/26

SECONDARY ACCESSION(S): PRJNA264337

REPOSITORIES: GEO

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Site-specific methylation of Notch1 controls the amplitude and duration of the Notch1 response

Project description:Physiologically, Notch signal transduction plays a pivotal role in differentiation; pathologically, Notch signaling contributes to the development of cancer. Transcriptional activation of Notch target genes involves cleavage of the Notch receptor in response to ligand binding, production of the Notch intracellular domain (NICD), and NICD migration into the nucleus and assembly of a coactivator complex. Posttranslational modifications of the NICD are important for its transcriptional activity and protein turnover. Deregulation of Notch signaling and stabilizing mutations of Notch1 have been linked to leukemia development. We found that the methyltransferase CARM1 (coactivator-associated arginine methyltransferase 1; also known as PRMT4) methylated NICD at five conserved arginine residues within the C-terminal transactivation domain. CARM1 physically and functionally interacted with the NICD-coactivator complex and was found at gene enhancers in a Notch-dependent manner. Although a methylation-defective NICD mutant was biochemically more stable, this mutant was biologically less active as measured with Notch assays in embryos of Xenopus laevis and Danio rerio. Mathematical modeling indicated that full but short and transient Notch signaling required methylation of NICD. Analysis of gene expression upon inactivation and activation of Notch signaling in Beko cells. Beko cells were treated with DAPT or DMSO for 24h. Or Beko cells were infected with a DNMAML-ER or Notch1-ER fusion protein. After Selection cells were treated with 4-OHT (Tamoxifen) or Ethanol for 48h.

2015-03-26 | E-GEOD-62528 | biostudies-arrayexpress

Expression profiling of murine neonatal lung tissue from Carm1 knockouts and wild type controls

Project description:Coactivator associated arginine methyltransferase I (CARM1, also known as Protein aRginine MethylTransferase 4, or PRMT4) regulates gene expression by multiple mechanisms including methylation of histones and coactivation of steroid receptor transcription. Mice lacking CARM1 are smaller than their littermates, fail to breath, and die shortly after birth, demonstrating the critical role of CARM1 in development.We performed gene expression analysis to identify genes that are responsible for hyperproliferaion in CARM1 knockout lung. RNA extracted from murine lung at E18.5 with carm1 knockouts and wild type controls was hybridised to Affymetrix mouse430.2 GeneChips to identify differentially expressed genes in the disease state.

2010-07-07 | E-GEOD-21606 | biostudies-arrayexpress

Expression profiling of murine neonatal lung tissue from Carm1 knockouts and wild type controls

2010-07-07 | GSE21606 | GEO

Expression analysis in Carm1 and Pax3 mutant embryos

Project description:We have found that Coactivator-associated Arginine Methyltransferase 1 (Carm1) mutant mice have highly penetrant heart defects. These are similar to those found in Pax3 mutant mice and PAX3 is a target of CARM1-mediated methylation. We analyzed gene expression at mid-gestation in both mutant lines.

2022-01-16 | GSE193588 | GEO

Global tibialis anterior skeletal muscle transcript data from male Carm1 skm-/- (HSAcre Tg/0 x Floxed Carm1) and Carm1 skm+/+ mice (HSAcre 0/0 x Floxed Carm1) on a chow diet.

Project description:Transcript data from tibialis anterior muscle from male muscle-specific Coactivator-Associated Arginine Methyltransferase 1 (Carm1 ) knockout mice (Carm1 skm-/- ) and wild-type mice (Carm1 skm+/+) generated by using the Cre-loxP system (on a C57BL6J/129 background) with HSA-Cre mice (from Jackson laboratories). We used RNA-Seq to detail the effects of muscle-specific loss of Carm1 on the global program of gene expression in tibialis anterior muscle.

2022-08-24 | GSE189351 | GEO

Histone arginine methyltransferase CARM1 Is Crucial for Epigenetic Regulation of Starvation-induced Autophagy

Project description:Autophagy is a highly conserved self-digestion process, essential to maintain homeostasis and viability in response to nutrient starvation. Although the components of autophagy in the cytoplasm have been well-studied, molecular basis for the epigenetic regulation of autophagy is poorly understood. Here, we identify histone arginine methyltransferase CARM1 as a critical component of autophagy. We found that nutrient starvation increased CARM1 protein level and subsequently histone H3R17 dimethylation. Genome-wide analyses reveal that CARM1 exerts transcriptional coactivator function on autophagy-related genes and lysosomal genes through TFEB. Our findings demonstrate a previously unrecognized role of CARM1-dependent histone arginine methylation as a critical nuclear event of autophagy.

2016-06-17 | GSE72901 | GEO

A hypermethylation strategy utilized by enhancer-bound CARM1 to promote estrogen receptor a-dependent transcriptional activation and breast carcinogenesis (ChIP-Seq)

Project description:While protein arginine methyltransferases (PRMTs) and PRMT-catalyzed protein methylation have been well-known to be involved in a myriad of biological processes, their roles in carcinogenesis, particularly in estrogen receptor alpha (ERa)-positive breast cancers, remain incompletely understood. Here we focused on investigating PRMT4 (also called coactivator associated arginine methyltransferase 1, CARM1) due to its high expression and the associated poor prognosis in ERa-positive breast cancers. We first uncovered the chromatin-binding landscape and transcriptional targets of CARM1 in the presence of estrogen in ERa-positive breast cancer cells employing genomic and transcriptomics approaches. CARM1 was found to be predominantly and specifically recruited to ERa-bound active enhancers and essential for the transcriptional activation of cognate estrogen-induced gene transcriptional activation in response to estrogen. Global mapping of CARM1 substrates revealed that CARM1 methylates a large cohort of proteins with diverse biological functions, including regulation of intracellular estrogen receptor signaling, chromatin organization, chromatin remodeling and others. Intriguingly, a number of proteins were hypermethylated exclusively by CARM1 on a cluster of arginine residues. Exemplified by MED12, hypermethylation of these proteins by CARM1 served as a molecular beacon for recruiting coactivator protein, tudor domain-containing 3 (TDRD3), to ensure the full activation of estrogen/ERa target genes. In consistent with its critical role in estrogen-induced gene transcriptional activation, CARM1 was found to promote cell proliferation of ERa-positive breast cancer cells in vitro and tumor growth in mice. Taken together, our study uncovered a “hypermethylation” strategy utilized by CARM1 in gene transcriptional regulation, and suggested that CARM1 can server as a therapeutic target for breast cancer treatment.

2020-03-31 | GSE124448 | GEO

A hypermethylation strategy utilized by enhancer-bound CARM1 to promote estrogen receptor a-dependent transcriptional activation and breast carcinogenesis (RNA-seq)

2020-01-17 | GSE124447 | GEO

RNA-seq analysis CARM1 knockdown effect on MDA-MB-231 cells

Project description:Coactivator associated arginine methyltransferase 1 has been reported to play paramount roles in estrogen receptor alpha (ERα)-positive breast cancer. It promotes breast cancer development and metastasis. However, little research about CARM1 has been focused on triple-negative breast cancer (TNBC). Here, we report that CARM1 promotes proliferation, epithelial-mesenchymal transition (EMT) and stemness in TNBC. CARM1 transactivates Hypoxia-inducible factor 1 subunit alpha (HIF1A) and is physically associated with it. They function together in a concerted complex to regulate downstream targets and promote the carcinogenesis and metastasis of TNBC.

2024-02-24 | GSE167394 | GEO

CARM1 Methylates MED12 to Regulate its RNA Binding Ability

Project description:The coactivator-associated arginine methyltransferase (CARM1) functions as a regulator for transcription, splicing and chromatin regulation by methylating a diverse array of substrates. In this study, we used CARM1 substrate antibodies to perform immunoprecipitation coupled with mass spectrometry (IP-MS) in MEFs and identified Mediator Subunit 12 (MED12) as a novel substrate for CARM1. ChIP-seq analysis using CARM1, MED12 and H3R17me2a (represents ‘CARM1 activity’) antibodies revealed that MED12 targeted by CARM1 is recruited to the EREs (estrogen-responsive elements). Additionally, RT-PCR studies showed that the MED12R1899K mutation disrupting the methylation site reduced the expression of ER-target genes. Thus, MED12 methylation targets it to ER-specific enhancers and positively modulates transcription of Estrogen-driven genes.

2018-09-05 | GSE72848 | GEO

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