Epigenetic modifications, transcription factor (TF) availability and differences in chromatin folding influence how the genome is interpreted by the transcriptional machinery responsible for gene expression.
Finally, in phase (3), genes involved in histone modification and chromatin folding heterochromatize the DNA sequence.
Epigenetic changes occur at multiple levels, such as DNA methylation and histone modifications, both affecting chromatin folding, and non-coding microRNAs [ 144].
Our data suggest that inherited variation in MSL1 may impact risk of invasive serous ovarian cancer and are consistent with findings that irregular H4 modifications may cause errors in chromatin folding and gene expression and are widespread in cancer phenotypes [21].
Epigenetic mechanisms include chromatin folding and attachment to the nuclear matrix, packaging of DNA around nucleosomes, covalent modifications of histone tails, and DNA methylation in the whole genome and/or in specific gene promoters [ 75].
The epigenetic machinery encompasses chromatin folding and its attachment to the nuclear matrix, packaging of DNA around nucleosomes, covalent modifications of histone tails, DNA methylation, and regulatory non coding RNA (such as miRNA, snoRNA, lncRNA).
We investigated histone modifications, chromatin regulators, TFs, DHSs, and DNA sequence motifs in mESC.
We identify state-dependent promoter interactions as major drivers of chromatin folding in gene-dense regions.
Boettiger, A.N. et al. Super-resolution imaging reveals distinct chromatin folding for different epigenetic states.
As histone modifications regulate the accessibility of chromatin and gene activity [42], [43], [44], we first examined if hypertonicity induces, in vicinity of the OREs, histone acetylation, which is known to regulate chromatin folding [45] and is a hallmark of gene activation [46], [47], [48].
