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Series GSE124447 Query DataSets for GSE124447
Status Public on Jan 17, 2020
Title A hypermethylation strategy utilized by enhancer-bound CARM1 to promote estrogen receptor a-dependent transcriptional activation and breast carcinogenesis (RNA-seq)
Organism Homo sapiens
Experiment type Expression profiling by high throughput sequencing
Summary 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.
Overall design RNA-seq performed in this study was designed to understand the molecular mechanisms underlying CARM1 regulation of breast cancer
Contributor(s) Liu W, Peng B, Ding J
Citation(s) 32206101
Submission date Dec 27, 2018
Last update date Mar 30, 2020
Contact name Jiancheng Ding
Organization name Xiamen University
Street address School of Pharmaceutical Sciences, Xiamen University Xiang`an South Road
City Xiamen
State/province Fujian
ZIP/Postal code 361102
Country China
Platforms (1)
GPL21290 Illumina HiSeq 3000 (Homo sapiens)
Samples (14)
GSM3533454 RNA-Seq_MCF7_siCTL_CTL_rep1
GSM3533455 RNA-Seq_MCF7_siCTL_E2_rep1
GSM3533456 RNA-Seq_MCF7_siCARM1-1_CTL_rep1
This SubSeries is part of SuperSeries:
GSE124449 A hypermethylation strategy utilized by enhancer-bound CARM1 to promote estrogen receptor a-dependent transcriptional activation and breast carcinogenesis
BioProject PRJNA512031
SRA SRP174618

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Supplementary file Size Download File type/resource
GSE124447_RAW.tar 2.3 Gb (http)(custom) TAR (of BIGWIG)
SRA Run SelectorHelp
Raw data are available in SRA
Processed data provided as supplementary file

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