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Sample GSM2101766 Query DataSets for GSM2101766
Status Public on May 01, 2016
Title 3691_H3K27Ac
Sample type SRA
Source name Primary Patient Derived Tumor Model
Organism Homo sapiens
Characteristics tumor model: 3691
antibody: Abcam ab4729
Growth protocol Cells were cultured in Neurobasal medium supplemented with B27, L-glutamine, sodium pyruvate (Invitrogen, Waltham, MA), 10 ng/ml basic fibroblast growth factor (bFGF), and 10 ng/ml epidermal growth factor (EGF) (R&D Systems, Minneapolis, MN)
Extracted molecule genomic DNA
Extraction protocol For histone modification and transcription factor ChIP-Seq, 2 million cells (H3K27Ac) or 10 million cells (RBPJ) were crosslinked in PBS + 1% fresh formaldehyde for 10 minutes at 37 C, quenched for 5 minutes with 125 mM glycine, washed twice in cold PBS with protease inhibitors (complete PI, Roche), and stored at -80 C. Pellets were thawed and lysed in cold cytoplasmic lysis buffer (20 mM Tris-HCl ph8.0, 85 mM KCl, 0.5% NP 40 + PI). Nuclei were pelleted at 3000g , resuspended in cold SDS lysis buffer (1% SDS, 10mM EDTA, 50mM Tris-HCl, pH 8.1 + PI) for 10 minutes, sonicated to an average fragment size of 200-400 bp on a Branson sonifier, and cleared of debris by centrifugation. Samples were diluted 1:10 in ChIP dilution buffer (0.01% SDS, 0.25% Triton X-100, 1.2mM EDTA, 16.7mM Tris-HCl, pH 8.1, 167mM NaCl +PI), and rotated at 4 C overnight with 2-5 ug of antibody towards H3K27ac (Abcam, ab4729) or RBPJ (Abcam, no. 25949 ). Antigen-antibody complexes were collected with protein G Dynabeads (Life technologies) for 4 hours at 4 C, and sequentially washed with RIPA buffer (0.1% Na deoxycholate, 0.1% SDS, 1% Triton x-100, 10mM Tris-HCl pH 8.0, 1mM EDTA, 140 Mm NaCl), RIPA/High salt (0.1% Na deoxycholate, 0.1% SDS, 1% Triton x-100, 10mM Tris-HCl pH 8.0, 1mM EDTA, 360 mM NaCl), LiCl Wash Buffer (250mM LiCl, 0.5% NP40, 0.5% deoxycholate, 1mM EDTA, 10mM Tris-HCl, pH 8.0), and TE Buffer (10mM Tris-HCl pH 8.0, 1mM EDTA). Beads were resuspended in Low SDS ChIP elution buffer (10mM Tris-HCl pH 8.0, 0.5M EDTA, 300mM NaCl, 0.1% SDS, 5mM DTT) and incubated for 6 hours at 65 C to elute DNA and reverse crosslinking. Samples were treated with RNAase for 30 minutes and proteinase K for 2 hours at 37 C. ChIP DNA was then purified from supernatants with AMPure beads (Beckman-Coulter). Input DNA was prepared in parallel by adding unenriched, diluted chromatin directly into the elution / reverse crosslinking step.
ChIP DNA was end-repaired (End-It, Epicentre), A-tailed (Klenow fragment 3'-->5' exo-, New England Biolabs), and ligated to barcoded illumina adaptors (Quick T4 DNA ligase, NEB). Each reaction was followed by clean-up with AMPure beads (Beckman-Coulter). Ligation products were amplified by PCR for 14-18 cycles with illumina primers and PFU Ultra II HS PCR mix (Agilent). Library size selection to 300-600 bp was performed by two-step AMPure bead selection or gel purification (E-Gel SizeSelect 2%, Life technologies).
Library strategy ChIP-Seq
Library source genomic
Library selection ChIP
Instrument model Illumina NextSeq 500
Data processing Sequencing of H3K27ac and RBPJ ChIP and an unenriched chromatin control library (input) was performed on a NextSeq, with read lengths of 50bp
Reads were aligned to hg19 using BWA (Li, et. al., 2009)
Identical ChIP-seq sequence reads were collapsed to a single read to avoid PCR duplicates.
Peaks were called using HOMER v4.6 (Heinz, et. al., 2010) using matched inputs with the following parameters : H3K27ac, –histone –tagThreshold 50; RBPJ, –factor .
Genome_build: Hg19
Supplementary_files_format_and_content: Peak file (bed file) and bigwig file was generated for each sample by HOMER v4.6.
Submission date Mar 30, 2016
Last update date May 15, 2019
Contact name Tyler E Miller
Organization name Cleveland Clinic Lerner Research Institute
Department Stem Cell Biology and Regenerative Medicine
Lab Jeremy Rich Lab
Street address 2111 E 96th Street, NE3-256
City Cleveland
State/province Ohio
ZIP/Postal code 44106
Country USA
Platform ID GPL18573
Series (2)
GSE79734 Epigenetic Profile in RBPJ Maintains Brain Tumor Initiating Cells through CDK9-mediated Transcriptional Elongation
GSE79736 RBPJ Maintains Brain Tumor Initiating Cells through CDK9-mediated Transcriptional Elongation
BioSample SAMN04590814
SRA SRX1670480

Supplementary file Size Download File type/resource
GSM2101766_3691_H3K27ac_All_sites.bed.gz 311.6 Kb (ftp)(http) BED
SRA Run SelectorHelp
Raw data are available in SRA
Processed data provided as supplementary file

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