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Sample GSM2041076 Query DataSets for GSM2041076
Status Public on Sep 15, 2016
Title ChIP-Seq 2-cell K27Me3 rep2
Sample type SRA
Source name Preimplantation embryo
Organism Mus musculus
Characteristics strain: C57BL/6N x PWK
tissue/cell type: Preimplantation embryo
chip antibody: H3K27Me3
chip antibody vendor: Diagenode
chip antibody cat. #: C15410069; pAb-069-050
Treatment protocol Embryos were collected from C57BL/6N mice induced to superovulation by injections of 5 IU of pregnant mare’s serum gonadotrophin(Ningbo Sansheng Pharmaceutical Co, Ltd) and 5 IU of human chorionic gonadotrophin(Ningbo Sansheng Pharmaceutical Co, Ltd) 44-48 hours apart and mated to PWK males. Each set of embryos at a particular stage was flushed from the reproductive tract at defined time periods after hCG administration: 20h (MII oocyte), 27-28h (PN5 zygote), 30h (early 2-cell), 43h (late 2-cell), 54-56 h (4-cell), 68-70 h (8-cell) and 92-94 h (blastocysts) in Hepes-buffered CZB medium. The zona pellucida of embryos selected by cell number or morphology was gently removed by treatment of 10 IU/ml pronase (Sigma P8811) for several minutes. The embryos were then manually picked and treated with the lysis buffer for STAR ChIP-seq or Smart-seq2.
Extracted molecule genomic DNA
Extraction protocol After removing the zona pellucida, embryonic cells were washed with PBS and incubated in lysis buffer.
ChIP-Seq libraries were prepared using TELP developed by PengXu et al. (PMID: 25223787) with slightly modification.
Library strategy ChIP-Seq
Library source genomic
Library selection ChIP
Instrument model Illumina HiSeq 1500
Description processed data file: 2cell_k27me3.bed.gz; 2cell_K27me3_maternal.bed.gz
2cell_k27me3_broadpeak.bed.gz, 2cell_k27me3_maternal_broadpeak.bed.gz, 2cell_k27me3_paternal_broadpeak.bed.gz
Data processing Basecalls performed using CASAVA version 1.8
ChIP-seq reads were aligned to the mm9 genome using bowtie 2.2.2, replicates of same stage were pooled together and rpkm in wiggle files were counted by the number of reads falling into 100bp bin in the genome
RNA-Seq reads were aligned to the mm9 genome assembly using Tophat version 2.0.11, then replicates were merged together, and transcript abundance (FPKM) were calculated based on Refseq annotation using cufflinks version 2.0.2
Genome_build: mm9
Supplementary_files_format_and_content: The bed files include RPKM values in 100bp bins for each ChIP-seq sample. Bed files labeled maternal or paternal contain RPKM values for two parental alleles, allelic reads were normalized to total reads number. Tab-delimited text files include FPKM values RNA-seq sample.
Submission date Jan 18, 2016
Last update date May 15, 2019
Contact name Bingjie Zhang
Organization name Tsinghua University
Street address 30 Shuangqing Rd
City Beijing
State/province Beijing
ZIP/Postal code 100190
Country China
Platform ID GPL18480
Series (1)
GSE76687 Resetting epigenetic memory by reprogramming of histone modifications in mammals
BioSample SAMN04419965
SRA SRX1533825

Supplementary file Size Download File type/resource
GSM2041076_2cell_k27me3_rep2.bed.gz 72.3 Mb (ftp)(http) BED
SRA Run SelectorHelp
Raw data are available in SRA
Processed data are available on Series record

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