Project description:SEM cells were established from the peripheral blood of a 5-year-old girl in relapse with acute lymphoblastic leukaemia (ALL). SEM cells exhibit the t(4;11) chromosomal rearrangement, which leads to production of the MLL-AF4 fusion protein. Hematopoietic transcription factors including HOXA9 and MEIS1 are highly expressed in ALL. ChIP-seq was performed against HoxA9 and MEIS1 in SEM cells. DNA was enriched by chromatin immunoprecipitation (ChIP) and analyzed by Solexa sequencing.
Project description:modENCODE_submission_3606 This submission comes from a modENCODE project of Michael Snyder. For full list of modENCODE projects, see http://www.genome.gov/26524648 Project Goal: We are identifying the DNA binding sites for 300 transcription factors in C. elegans. Each transcription factor gene is tagged with the same GFP fusion protein, permitting validation of the gene's correct spatio-temporal expression pattern in transgenic animals. Chromatin immunoprecipitation on each strain is peformed using an anti-GFP antibody, and any bound DNA is deep-sequenced using Solexa GA2 technology. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf EXPERIMENT TYPE: CHIP-seq. BIOLOGICAL SOURCE: Strain: OP57(official name : OP57 genotype : unc-119(ed3); wgIs57(sem-4::TY1 EGFP FLAG; unc-119) outcross : 3 mutagen : Bombard tags : GFP::3xFlag description : This strain's transgene was constructed by Mihail Sarov at the Max Planck Institute for Cell Biology and Genetics in Dresden using Tony Hyman's recombineering pipeline. The resulting plasmid was used for bombardment transformation of an unc-119(ed3) strain. The SEM-4::EGFP fusion protein is expressed in the correct sem-4 spatio-temporal expression pattern. This strain was used for ChIP-seq experiments to map the in vivo binding sites for the sem-4 transcription factor. made_by : Bob Waterston's lab from UW ); Developmental Stage: L2; Genotype: unc-119(ed3); wgIs57(sem-4::TY1 EGFP FLAG; unc-119); Sex: Hermaphrodite; EXPERIMENTAL FACTORS: Developmental Stage L2; Target gene sem-4; Strain OP57(official name : OP57 genotype : unc-119(ed3); wgIs57(sem-4::TY1 EGFP FLAG; unc-119) outcross : 3 mutagen : Bombard tags : GFP::3xFlag description : This strain's transgene was constructed by Mihail Sarov at the Max Planck Institute for Cell Biology and Genetics in Dresden using Tony Hyman's recombineering pipeline. The resulting plasmid was used for bombardment transformation of an unc-119(ed3) strain. The SEM-4::EGFP fusion protein is expressed in the correct sem-4 spatio-temporal expression pattern. This strain was used for ChIP-seq experiments to map the in vivo binding sites for the sem-4 transcription factor. made_by : Bob Waterston's lab from UW ); temp (temperature) 20 degree celsius
Project description:Genome-wide DNA methylation profiling of human B-ALL cell line SEM after 48 h incubation with DMSO (control), CX-4945 (Silmitasertib), Decitabine (DEC) or combined CX-4945 + DEC treatment. The Infinium MethylationEPIC BeadChip was used to obtain DNA methylation profiles across approximately 866,895 CpG islands.
Project description:MLL-fusion proteins are potent inducers of cancer in hematopoietic cells, where they are known to cause changes in global gene expression. How MLL-fusion proteins interact with the genome has not been established, so we have limited understanding of the pathway by which these proteins generate aberrant gene expression programs. Here we describe how the MLL-AF4 protein occupies the genome in human leukemia cells and its striking effects on chromatin states. We find that the MLL-AF4 fusion protein selectively occupies regions of the genome that contain developmental regulatory genes important for hematopoietic stem cell identity and self-renewal. These MLL-AF4 bound regions have grossly altered chromatin structure, with histone modifications catalyzed by Trithorax Group (TrxG) proteins and Dot1 extending across unusually large domains. This indicates that a key feature of MLL-associated leukemogenesis is aberrant targeting of chromatin modifiers to regions of the genome controlling hematopoietic development. Our results define the direct targets of the MLL-fusion protein, reveal the global role of epigenetic misregulation in leukemia, and identify new targets for therapeutic intervention in human cancer. This dataset includes expression data for two replicates each of SEM and REH leukemia cell lines, ChIP-chip data targeting RNAP2, H3K4me3, H3K79me2, ENL, AF4-C, and MLL-N in SEM and REH leukemia cell lines, and ChIP-Seq data of H3K79me2, H3K4me3, ans WCE in SEM and REH cell lines. This Series contains the ChIP-Seq data only. The expression and ChIP-chip data are provided in GEO Series GSE13313.