Epigenetic mechanisms are stable and heritable modifications responsible for regulating gene transcription without altering the DNA's nucleotide sequence [ 1].
DNA methylation is a major epigenetic modification important for regulating gene expression and suppressing spurious transcription.
It has been shown that both the histone tails and globular domains are subjected to a diverse array of the posttranslational covalent modifications (e.g. acetylation and methylation), and that such modifications are pivotal for regulating chromatin dynamics and transcriptional output of the gene/genome (1 4).
Both these post-translational modifications are critical for regulating the role of SMARCAD1 in DNA end resection, HR-mediated repair, and cell survival after DNA damage.
Post-translational modifications are crucial for regulating the functions of many eukaryotic proteins and among them, lysine acetylation has proven to be important for controlling transcription factor activity [ 45– 45].
Posttranslational modification is critical for regulating the localization, stability, and activity of proteins, as well as their ability to form macromolecular complexes (Walsh 2006).
The second well-known epigenetic mechanism is histone modification, which is critical for regulating chromatin structure and function (Jenuwein and Allis 2001; Luger et al. 1997).
Here, we looked for synthetic interactions between the splicing factors and the elongation factor TFIIS (DST1), which is synthetically lethal in combination with bur2Δ [52]; SPT4 whose activity is regulated by the Bur complex [43]; and LEO1, a nonessential member of the PAF complex [52], [53] responsible for regulating histone modifications that promote active transcription.
Post-translational modifications, including ubiquitination, are important for regulating the clock feedback mechanism.
The fact that some important features of the QS mechanism, e.g. precision, rely on the burst size of one component, opens the door to modifications of the LuxI/LuxR operon for regulating the response depending on the problem under consideration.
