In AGAP009604, the DM9 motif is associated with a domain homologous to the farnesoic methyl transferases of crustaceans [19].
The latter belong to a family of S-adenosyl-methionine-dependent methyl transferases, of which several have been well studied in Mycobacterium tuberculosis, namely, MmaA1 through A4, PcaA and CmaA2.
Ketoconazole inhibits the C24alpha demethylase, while 22,26-azasterol 22,26-azasterol-epiminolandsterol block the δ24- R)—sterol methyl transferase of T. cruzi amastigotes.
A third attenuating knockout vector targeted PBANKA_140160, a putative methyl transferase of unknown function, which emerged as a slow-growing mutant from a preliminary screen of metabolic enzymes (data not shown).
Other protective processes include modulation of DNA methyl transferases to prevent or reverse the hypermethylation-induced inactivation of tumour suppressor genes.
CpG sites around the transcription start site (TSS) are targets of DNA methyl transferases: the methylation of cytosine residues represses transcription [ 37].
Methylation at position 5 of the cytosine ring in a CpG dyad is initiated and maintained by a set of DNA methyl transferases (DNMT), some of which are de-novo (DNMT3A, DNMT3B), while another (DNMT1) is a maintenance enzyme [1].
In previous studies, using inhibitors of methyl guanine methyl transferase to prevent DNA repair during cytotoxic therapy, the dose of chemotherapy needed to be reduced because of enhanced toxicity with the treatment combination [ 32- 34].
Neuronal differentiation is a very dynamic process that involves epigenetic mechanisms such as DNA methylation, which is governed by DNA methyl transferases (DNMTs), recruitment of the methyl-CpG binding domain (MBD), and histone modification.
At least three H3K9-specific methyl transferases mediate the methylation of H3K9 in Drosophila: Su var)3 9, SETDB1, and G9a.
Among acetyl transferases, demethylases and methyl transferases, the majority of genes showed a decrease in expression at M5 (Additional file 5), and while genes encoding the subunits of DNA- and RNA-polymerases were downregulated, other non-catalytic subunits common to nuclear DNA-dependent RNA polymerases showed the opposite profile (Additional file 6 and 7).
