Human Gene Set: SCHLESINGER_H3K27ME3_IN_NORMAL_AND_METHYLATED_IN_CANCER


Standard name SCHLESINGER_H3K27ME3_IN_NORMAL_AND_METHYLATED_IN_CANCER
Systematic name M16297
Brief description Genes bearing the H3K27me3 mark in normal cells; their DNA is methylated in cancer cells.
Full description or abstract Many genes associated with CpG islands undergo de novo methylation in cancer. Studies have suggested that the pattern of this modification may be partially determined by an instructive mechanism that recognizes specifically marked regions of the genome. Using chromatin immunoprecipitation analysis, here we show that genes methylated in cancer cells are specifically packaged with nucleosomes containing histone H3 trimethylated on Lys27. This chromatin mark is established on these unmethylated CpG island genes early in development and then maintained in differentiated cell types by the presence of an EZH2-containing Polycomb complex. In cancer cells, as opposed to normal cells, the presence of this complex brings about the recruitment of DNA methyl transferases, leading to de novo methylation. These results suggest that tumor-specific targeting of de novo methylation is pre-programmed by an established epigenetic system that normally has a role in marking embryonic genes for repression.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 17200670   Authors: Schlesinger Y,Straussman R,Keshet I,Farkash S,Hecht M,Zimmerman J,Eden E,Yakhini Z,Ben-Shushan E,Reubinoff BE,Bergman Y,Simon I,Cedar H
Exact source Table 1S
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Source species Homo sapiens
Contributed by Leona Saunders (MSigDB Team)
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identifier namespace		 HUMAN_GENE_SYMBOL
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Version history 3.0: First introduced

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