GEO Logo
   NCBI > GEO > Accession DisplayHelp Not logged in | LoginHelp
GEO help: Mouse over screen elements for information.
Sample GSM1027478 Query DataSets for GSM1027478
Status Public on Apr 24, 2014
Title POB_Runx2Veh
Sample type SRA
Source name MC3T3-E1 cells
Organism Mus musculus
Characteristics passage number: 5 - 12
antibody: RUNX2 (Santa Cruz, M-70, sc10758, lot# D1411)
cell line: MC3T3-E1
treatment: ethanol vehicle
Treatment protocol Cells were treated with 100nM 1,25(OH)2D3 [125] or with ethanol vehicle [Veh] for 3 hours prior to ChIP assay
Growth protocol MC3T3-E1 cells were cultured in alpha MEM with 10% heat-inactivated fetal bovine serum from Hyclone (Logan, UT) and 1% penicillin-streptomycin. Differentiated cells were cultured in complete media plus 10mM glycerol-2-phosphate and 50ug/mL ascorbic acid for 15 days, changing media every 2-3 days.
Extracted molecule genomic DNA
Extraction protocol Chromatin immunoprecipitation was performed as described previously (Meyer MB. Mol Endo. 2012). Briefly, MC3T3-E1 cells were treated for 3 hrs with vehicle or 100nM 1,25(OH)2D3. Samples were subjected to immunoprecipitation using either a control IgG antibody or the indicated experimental antibody (VDR, RXR, C/EBPβ, RUNX2, H3K5Ac, H3K9Ac, H3K4me1, H3K4me3, or H3K36me3). For differentiated cells, there was substantial mineralized matrix. To remove the matrix from the assay, the cell/matrix mix was subjected to 3x 15s pulses with a Polytron Homogenizer (Power Gen 125, Fisher Scientific) while in NCP 1 buffer (Hepes 10mM pH 6.5, EDTA 10mM, EGTA 0.5mM, Triton X-100 0.25%). The resulting homogenate was centrifuged (200 x g) through a 10% sucrose buffer at a 1:1 ratio (10mM Tris-HCl, 15mM NaCl, 60mM KCl, 1mM EDTA, 10% Sucrose). Resulting cell pellet was resuspended in NCP 2 buffer (Hepes 10mM pH 6.5, EDTA 1mM, EGTA 0.5mM, NaCl 200mM) and remainder of protocol was followed (Meyer MB. Mol Endo. 2012). The isolated DNA (or Input DNA acquired prior to precipitation) was then validated by quantitative real time PCR (qPCR) and further prepared for ChIP-seq analysis. ChIP-seq libraries were prepared using the NEBNext DNA sample prep kit (NEB, #E6000L) with the Bioo NEXTflex ChIP-seq Barcodes (Bioo Scientific, Austin, TX, #514122) according to manufacturer’s protocols, with few exceptions. During the NEBNext prep, the Illumina adapters were replaced with the Bioo Scientific Barcoded adapters according to Bioo protocols. ChIP-DNA ligated libraries were cleaned up with Agencourt AMPureXP Magnetic Beads (Beckman-Coulter, #A63881). A pre-size selection PCR was performed using Phusion polymerase, NEXTflex Primer Mix and purified ligation product for 4 cycles of PCR according to the Bioo Protocol. Libraries were size selected using Invitrogen E-gels to a size of 400-500bp. Samples were then PCR amplified for 14 cycles using Phusion polymerase, NEXTflex Primer mix and the size selected DNA as per Bioo protocol, followed by Agencourt bead clean up. Libraries were validated for integrity using the Agilent Bioanalyzer 2100 (Agilent Technologies, Santa Clara, CA). Clusters were formed and sequenced on the Illumina GAIIx [for all samples sequenced before June, 2011] or the Illumina HiSeq2000 [after June, 2011] sequencers by the University of Wisconsin - Madison DNA Sequencing Facility in the University of Wisconsin- Madison Biotechnology Center. DNA clusters were generated using a cBot Single Read Cluster Generation kit (ver. 3) on an Illumina cBot (Illumina) according to the manufacturer's instructions, to obtain an average of 1.5×108 clusters for each lane on a flowcell. All sequencing runs for 50mers were performed on an Illumina HiSeq2000 using the Illumina Sequencing kit (ver. 3). Fluorescent images were analyzed using the CASAVA 1.8.2 (Illumina) to obtain FASTQ formatted sequence data. Twelve barcoded libraries were run per lane and this was repeated over 4 lanes. After which, the raw FASTQ for each sample was concatenated from the 4 lanes prior to mapping to create a single sample. Each ChIP sample was repeated in biological replicate in the same manner (minimum of 2 replicates). Sequences were mapped to the mouse genome (mm9) using BOWTIE (--best –m 1) to yield unique alignments.
Library strategy ChIP-Seq
Library source genomic
Library selection ChIP
Instrument model Illumina HiSeq 2000
Data processing ChIP-seq runs were all 50bp. Barcoded samples were run over 4 lanes total and the fastq data were concatenated prior to BOWTIE mapping. 12 barcoded samples were run in each lane, over 4 lanes total. Barcodes were decoded by Illumina HiSeq2000 software automatically. All samples were mapped from fastq files using BOWTIE [-m 1 -- best] to mm9 [UCSCmouse genome build 9]. Replicate lanes were analyzed separately for reproducibility and normalization of the peak calls.
Peaks were called by using HOMER [] and QuEST [].
QuEST 2.4 was run using the recommend settings for transcription factor (TF) like binding with the following exceptions: kde_bandwith=30, region_size=600, ChIP threshold=30, enrichment fold=3, rescue fold=3
HOMER analysis was run using the default settings for peak finding. Histone peaks were called with a 2-fold enrichment over input instead of 4-fold (for transcription factors) given the nature of histone chip-seq.
False Discovery Rate (FDR) cut off was 0.001 (0.1%) for all peaks.
Genome_build: mm9
Supplementary_files_format_and_content: fastq files are the raw sequence files [barcoded lanes (4 each) were concatenated for each sample for simplicity, no other modification was made], bedGraph files are for display in the UCSC genome browser, *replicate_overlap.bed are the resulting peaks found with QuEST and HOMER after normalization between both replicates
Submission date Oct 30, 2012
Last update date May 15, 2019
Contact name Mark B Meyer
Phone 608-890-0857
Organization name University of Wisconsin-Madison
Department Nutritional Sciences
Lab Meyer Lab
Street address 1415 Linden Dr.
City Madison
State/province WI
ZIP/Postal code 53706
Country USA
Platform ID GPL13112
Series (2)
GSE41920 The RUNX2 Cistrome in Osteoblasts: Characterization, Downregulation Following Differentiation and Relationship to Gene Expression [ChIP-Seq]
GSE41955 The RUNX2 Cistrome in Osteoblasts: Characterization, Downregulation Following Differentiation and Relationship to Gene Expression
SRA SRX201981
BioSample SAMN01797394

Supplementary file Size Download File type/resource
GSM1027478_MC3T3_Runx2Veh_rep1.tagdirnew.ucsc.bedGraph.gz 95.6 Mb (ftp)(http) BEDGRAPH
GSM1027478_MC3T3_Runx2Veh_rep2.tagdirnew.ucsc.bedGraph.gz 84.4 Mb (ftp)(http) BEDGRAPH
GSM1027478_MC3T3_Runx2Veh_replicate_overlaps.bed.gz 193.9 Kb (ftp)(http) BED
SRA Run SelectorHelp
Raw data are available in SRA
Processed data provided as supplementary file

| NLM | NIH | GEO Help | Disclaimer | Accessibility |
NCBI Home NCBI Search NCBI SiteMap