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Series GSE59087 Query DataSets for GSE59087
Status Public on Jan 01, 2015
Title ChIP-seq analysis of PRC2 core subunits in primary human erythroid progenitor cells
Organism Homo sapiens
Experiment type Genome binding/occupancy profiling by high throughput sequencing
Summary Polycomb Repressive Complex 2 (PRC2) plays crucial roles in transcriptional regulation and stem cell development. However, the context-specific functions associated with alternative subunits remain largely unexplored. Here we show that the related enzymatic subunits EZH1 and EZH2 undergo an expression switch during hematopoiesis. We examine the in vivo stoichiometry of the PRC2 complexes by quantitative proteomics and reveal the existence of an EZH1-SUZ12 sub-complex lacking EED. We provide evidence that EZH1 together with SUZ12 form a non-canonical PRC2 complex, occupy active chromatin domains in the absence of H3K27me3, and positively regulate gene expression. Loss of EZH2 expression leads to global repositioning of EZH1 chromatin occupancy to EZH2 targets. Moreover, we demonstrate that an erythroid-specific enhancer mediates transcriptional activation of EZH1, and a switch from GATA2 to GATA1 controls the developmental EZH1/2 switch by differential association with EZH1 enhancers during erythropoiesis. Thus, the lineage- and developmental stage-specific regulation of PRC2 expression and subunit composition leads to a switch from canonical silencing to non-canonical PRC2 functions during blood stem cell specification.
Overall design Analysis of genomic occupancy of EZH1, EZH2, EED, SUZ12, various histone marks and transcription factors in primary human fetal liver proerythroblasts by ChIP-seq. Sample GSM970262 was used as the input DNA sample.
Contributor(s) Xu J, Shao Z, Orkin SH
Citation(s) 25578878
Submission date Jul 03, 2014
Last update date May 15, 2019
Contact name Jian Xu
Phone 214-648-6125
Organization name UT Southwestern Medical Center
Department Children's Research Institute
Street address 6000 Harry Hines Blvd. NL12.108B
City Dallas
State/province TX
ZIP/Postal code 75235
Country USA
Platforms (1)
GPL11154 Illumina HiSeq 2000 (Homo sapiens)
Samples (15)
GSM1427063 H3K27me1
GSM1427064 H3K27me3
GSM1427065 H3K4me3
This SubSeries is part of SuperSeries:
GSE59090 ChIP-seq and RNA-seq analysis of PRC2 core subunits in primary human erythroid progenitor cells
BioProject PRJNA254354
SRA SRP044054

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Supplementary file Size Download File type/resource
GSE59087_RAW.tar 12.1 Gb (http)(custom) TAR (of BED, WIG)
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Raw data are available in SRA
Processed data provided as supplementary file

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