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Sample GSM2563171 Query DataSets for GSM2563171
Status Public on Jun 02, 2017
Title 260Fish_D_E4_input_GATCAG_L005_R1_001
Sample type SRA
Source name experiment_diencephalon_30min
Organism Gasterosteus aculeatus
Characteristics brain region: Diencephalon
timepoint (min after the flask was introduced): 30
sample group: Experiment
chip antibody: none
Extracted molecule genomic DNA
Extraction protocol For tissue intended for ChIP-Seq, brain tissue from regions of interest was pooled and kept at 4° C until homogenization in PBS with protease inhibitor cocktail (PIC, Roche, Basel, Switzerland). Fresh brains were homogenized in pools of five on ice by motorized pestle. Homogenized brains were fixed in PBS with 1% formaldehyde for 10 minutes. Fixing reaction was stopped with addition of Glycine to 0.125M. Fixed cells were washed 3x with PBS+PIC to remove formaldehyde. Washed cells were lysed to nuclei with lysis solution – 50 mM Tris-HCl (pH 8.0), 2 mM EDTA, 0.1% v/v NP-40, 10% v/v glycerol, and PIC – for 30 minutes on ice. Cell debris was washed away with PBS with PIC. Nuclei were pelleted and flash-frozen on dry ice. Frozen nuclei were thawed on ice in lysis solution (1% SDS, 10mM EDTA, 50mM Tris, pH 8.1 with protease inhibitor cocktail). Nuclei were counted using a hemocytometer. Nuclei were sonicated at high power for 7 x 7 minute cycles (30 s on, 30 s off) in a BiorupterTM UCD-200 (Diagenode, Liège, Belgium) sonicator. Remaining cellular debris was pelleted by centrifugation for 10 minutes at 13,000 x g.
Fragmented chromatin was processed for histone H3K27Ac ChIP (Abcam ab4729) with Diagenode iDeal ChIP kits (Diagenode #C01010051, Liège, Belgium), according to manufacturer’s specifications with minor adjustments. One million nuclei were used for each IP. 25 µl of each IP was reserved for input samples. Technical replicate inputs were pooled to 50 µl. 2 ug of h3k27ac antibody was used for each IP. An additional wash in TE buffer was performed after the initial four IP washes. Chromatin was processed for ESRRA ChIP using a customized protocol. Briefly, sonicated samples were pre-incubated with Protein G Dynabeads (Invitrogen 10009D) for three hours. Beads were removed and 10 µg of ESRRA antibody (SC-66882, Santa Cruz Biotechnology, Dallas, TX, USA) was added overnight with rotation at 4° C. Protein G beads were added for 3 hours to bind antibodies. Beads were washed with high salt, low salt, LiCl, and TE buffers for 5 minutes each in succession. Precipitated chromatin was eluted in ChIP elution buffer (1% SDS, 0.1 M NaHCO3) for 15 minutes twice in 25 µl. Samples were reverse cross-linked at 65° C with 1,300 rpm rotation overnight. Samples were phenol-chloroform extracted with standard methods and eluted into 20 µl of nuclease-free water. After ChIP, immunoprecipitated DNA was quantified using a Qubit 2.0 (Life Technologies, Carlsbad, CA, USA) with a dsDNA HS Assay kit (Life Technologies #Q32854). Libraries were prepared using KAPA LTP library kits (KK8230), with protocol as written, using Bioo Scientific index adapters. Libraries were size selected using AmpureXP beads (Beckman Coulter, Brea, CA, USA), with protocol as written, selecting for DNA between 200-500bp in size. Library quality was checked by Qubit 2.0 and Bioanalyzer (Agilent 2100). Samples were sequenced with an Illumina HiSeq 2500 sequencer using a TruSeq SBS sequencing kit, version 4. All samples were sequenced in single end format with fragment length of 100 bp.
Library strategy ChIP-Seq
Library source genomic
Library selection ChIP
Instrument model Illumina HiSeq 2500
Data processing Base calling and demultiplexing into FASTQ files was done using bcl2fastq v1.8.4 software (Illumina, San Diego, CA, USA).
Sequence data were aligned with Bowtie2 (Langmead and Salzberg 2012) to the stickleback genome (v. 75), using default settings.
Aligned sequence data were analyzed for peaks using HOMER (Hypergeometric Optimization of Motif EnRichment) v4.7 (Heinz et al. 2010).
After peak calling, peak files were annotated to the stickleback genome using HOMER’s annotation script to assign peaks to genes, and associate peaks with differential expression data.
BigWiggle pileup files were generated using HOMER’s script with default settings.
Genome_build: Gasterosteus aculeatus reference genome (the repeat masked reference genome, Ensembl release 75).
Supplementary_files_format_and_content: BigWig files were generated using HOMER's script with default settings. Scores represent read depth. BigWig files for inputs represent single samples. The remaining BigWig files represent the pooled read depth for the two samples with the same brain region, timepoint, control or treatment, and ChIP antibody.
Submission date Apr 04, 2017
Last update date May 15, 2019
Contact name Alison Bell
Organization name University of Illinois at Urbana Champaign
Department Animal Biology
Lab Alison Bell Lab
Street address Justin Smith Morrill Hall, 505 S Goodwin Ave #393
City Urbana
State/province Illinois
ZIP/Postal code 61801
Country USA
Platform ID GPL21984
Series (2)
GSE97370 Temporal Dynamics of Neurogenomic Plasticity in Response to Social Interactions in Male Threespined Sticklebacks [ChIP-Seq]
GSE97383 Temporal Dynamics of Neurogenomic Plasticity in Response to Social Interactions in Male Threespined Sticklebacks
BioSample SAMN06680004
SRA SRX2704356

Supplementary file Size Download File type/resource
GSM2563171_260_Fish_D_E4_30_input_S1.ucsc.bigWig 52.1 Mb (ftp)(http) BIGWIG
SRA Run SelectorHelp
Raw data are available in SRA
Processed data provided as supplementary file

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