The natural expression of MGMT is a key in maintaining DNA stability of the DNA structure and repairing DNA alkylation damage.
A contrasting genomic aberration in prostate cancer is deletion of CHD1 (chromodomain helicase DNA-binding protein-1), a gene involved in maintaining DNA stability.
These findings, as well as our result may indicate that the intake of folate adequate for prevention of clinical deficiency may not be optimal for maintaining DNA stability.
Methylation of the cytosine residues of cytosine guanine dinucleotide pairs is an important epigenetic determinant of gene expression and also has a role in maintaining DNA stability.
In particular, we focus on mammalian cell cycle checkpoint functions, their role in maintaining DNA stability during the cell cycle following exposure to genotoxic agents, and the gene products that act in checkpoint function signal transduction cascades.
Having efficient methyl groups with three active methyls, betaine may reduce the consumption of folic acid in the methionine cycle, and it may play some part in maintaining DNA stability [ 42, 43].
Taken together, these results reinforce the role of this vitamin in maintaining DNA integrity and stability.
MTHFR is another central enzyme for maintaining DNA integrity and stability by regulating the folate pool.
Trp-40, Trp-54, Trp-88 and Phe-60 have been shown to play important roles in maintaining protein-DNA stability (Casas-Finet et al., 1987; Khamis et al., 1987; Ferrari et al., 1997).
The regions of highest DNA density were found to be located near the Trp-54, His-55, and Arg-56 residues, consistent with their known role in maintaining protein-DNA stability (Casas-Finet et al., 1987; Ferrari et al., 1997; Raghunathan et al., 2000).
