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Sample GSM2197723 Query DataSets for GSM2197723
Status Public on Jun 15, 2016
Title 989_NocMPM2pos_H3K27Ac
Sample type SRA
 
Source name 989_NocMPM2pos_H3K27Ac
Organism Mus musculus
Characteristics cell line: G1E ER4
treatment: estradiol 13h
transgene: stably expressing YFP-MD
nocodazole: Nocodazole blocked
cell sorting: MPM2 positive
chip antibody: anti-H3K27Ac antibody (ActiveMotif, cat# 39685, lot# 30615010)
Treatment protocol We induced cells to mature with 100nM estradiol to activate GATA1-ER. During estradiol induction, we simultaneously treated cells with nocodazole (200ng/ml) for 7h and collected them (for nocodazole blocked samples), or washed once and replated into fresh medium lacking nocodazole for the indicated time (40min). ensuring all samples are exposed to estradiol for the same duration of 13h. We fixed cells with 1% formaldehyde, stained with DAPI, and sorted on a BD FACSAria based on YFP-MD and DAPI signal. Sorting of MPM2-positive prometaphase populations and MPM2-negative interphase populations was carried out as described in (Campbell, Hsiung, and Blobel 2014).
Growth protocol G1E erythroblasts were previously derived through deletion of GATA1 in mouse embryonic stem cells, followed by in vitro differentiation (Weiss, Yu, and Orkin 1997). We cultured a sub-line of G1E cells, G1E-ER4, in which GATA1-ER was retrovirally transduced (referred to in main text as “G1E GATA1-ER"), as previously described (Weiss, Yu, and Orkin 1997). We retrovirally transduced G1E-ER4 cells with the YFP-MD construct (Kadauke et al. 2012) and sorted for a pool of YFP-positive cells.
Extracted molecule genomic DNA
Extraction protocol All samples were processed for library construction for Illumina sequencing using Illumina’s TruSeq ChIP Sample Preparation Kit (Illumina cat# IP-202- 1012). In brief, DNA fragments were repaired to generate blunt ends, purified using Agencourt AMPure XP Beads (Beckman Coulter cat# A63881), and a single “A” nucleotide was added to each end. Double-stranded Illumina adaptors were ligated to the fragments. Ligation products were purified using Agencourt AMPure XP Beads, and subject to size selection using SPRIselect Beads (Beckman Coulter cat# B23318)in which both a left side size selection was performed at 0.9x volume, and a right side size selection was performed at 0.6x volume according to manufacturer’s specifications. Library fragments were then amplified for 16 cycles of PCR and products were purified using Agencourt AMPure XP Beads. Constructed libraries were run on the Agilent Bioananlyzer 2100 (Agilent Technologies) using either the DNA 7500 kit (cat# 5067-1504) or the High Sensitivity DNA kit (cat# 5067-4626) as appropriate to determine the average size and confirm the absence of unligated adaptors. The mean library size is approximately 330 bp. The ChIP-seq libraries were quantitated by qPCR using the Kapa SYBR FAST Universal kit (Kapa Biosystems) according to the Illumina’s Sequencing Library qPCR Quantification Guide. Libraries were multiplexed and sequenced on the Illumina HiSeq 2000 using Illumina’s kits and reagents as appropriate.
 
Library strategy ChIP-Seq
Library source genomic
Library selection ChIP
Instrument model Illumina HiSeq 2000
 
Data processing Basecalls using bcl2fastq-1.8.4 for HiSeq and bcl2fastq-2.0 for NextSeq and parameters --no-eamss --mismatches 1
Mapping to reference genome mm9 canon with Bowtie 1.0.0 using parameters --chunkmbs 1024 -y -n 2 --best -k 1 --maxbts 800 -l 28 -e 80 --sam-nohead --sam
Wiggle generated with MACS using parameters --nomodel --shiftsize=120--format BAM --gsize 1870000000 --tsize 36 --bw 120 --mfold 12 --wig --space 1
Peaks called with Sicer V1.1 using parameters mm9 1 200 150 0.74 600 0.01
Filter blacklist regions from peaks, and convert to broadpeak format (see UCSC Genome Browser for format specs)
Genome_build: mm9
Supplementary_files_format_and_content: .bigwig files containing read coverage (not normalized to total library size)
 
Submission date Jun 13, 2016
Last update date May 15, 2019
Contact name Ross Hardison
E-mail(s) rch8@psu.edu
Organization name Pennsylvania State University
Street address 303 Wartik Lab
City University Park
State/province PA
ZIP/Postal code 16802
Country USA
 
Platform ID GPL13112
Series (2)
GSE83255 A hyperactive transcriptional state marks genome reactivation at the mitosis-G1 transition [Hist]
GSE83293 A hyperactive transcriptional state marks genome reactivation at the mitosis-G1 transition
Relations
BioSample SAMN05232024
SRA SRX1838185

Supplementary file Size Download File type/resource
GSM2197723_989.bw 2.9 Gb (ftp)(http) BW
SRA Run SelectorHelp
Raw data are available in SRA
Processed data provided as supplementary file

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