In summary, the ChIP analyses revealed the predominance of repressive histone modifications and a nearly complete loss of H3K4me3, with partial retention of H4K16ac, a modification characteristic of fixed nucleosomes, across the entire analyzed region in all urothelial carcinoma cells.
H3K27me3 represents the modification characteristic of Polycomb-silenced genes, and its prominent association with SYT-SSX2 supports a role for the oncogene in the re- activation of Polycomb-silenced genes.
Mitochondria play an essential role in metabolism, bioenergetics and cell death regulation and consequently oncogenic modifications characteristic of many cancer types mediate the array of metabolic alterations of cancer cells by impairing key mitochondrial functions.
Proteomics can be used to identify alterations in protein expression and post translational modifications characteristic of diseases during different stages of their development at the level of tissue, cell, organelle or other subcellular structures.
The 3' exons of ZNF genes have histone modifications characteristic of both silenced and active regions.
Other studies have analysed epigenetic modifications characteristic of the inactive X chromosome.
ChIP followed by quantitative PCR of the region spanning the +1 nucleosome showed significant enrichment of histone modifications characteristic of heterochromatin formation specifically in FRDA cell lines.
A number of chromatin remodeling proteins associate with the inactive X chromosome resulting in the acquisition of many histone modifications characteristic of heterochromatin (reviewed in [ 3]).
As a consequence, only new, naïve histones that do not bear the post-translational modifications characteristic of the parental chromatin would be incorporated.
Consistent with this view, FRDA patient alleles have been shown to be enriched for a variety of histone modifications characteristic of silenced genes including hypoacetylated H3 and H4 and dimethylation and trimethylation of histone H3 lysine 9 (H3K9) [ 48, 50].
