MTH1 Proteins and Enzymes

Oxygen radicals damage chromosomal DNA causing cell death and inducing mutations. Among the various classes of DNA damage caused by oxygen radicals, an oxidized form of guanine base (8-oxoguanine) appears to be important as it can pair with cytosine and adenine and G:C to T:A transversion mutation occurs. A significant amount of 8-OxoG is formed in the chromosomal DNA of mammalian cells, with most damaged nucleotides excised from the DNA and excreted in the urine. Along with 8-oxoG being ...