Spontaneous deamination of cytosine and 5-methylcytosine residues in DNA and replacement of 5-methylcytosine residues with cytosine residues
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2021, Journal of Structural BiologyCitation Excerpt :The mispairing of the bases cause damage to the DNA. The base pair mismatches can be introduced in the DNA through various mechanisms such as spontaneous deamination, methylation, replication errors, etc. (Ehrlich et al., 1990; Goodman et al., 1993; Kunz et al., 2009). There are eight possible ways the 4 bases can mispair among themselves and form base pair mismatches which destabilize the DNA duplex structure due to their nonisostericity with respect to the flanking canonical base pairs (Ananth et al., 2013).
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2015, Marine GenomicsCitation Excerpt :Deamination of cytosine yields uracil (Fig. 3c), and deamination of 5-methyl-cytosine yields thymine. Similarly to depurination, cytosine deamination rates have been measured in vitro, and increase with increasing temperature and under acidic conditions (Ehrlich et al., 1990; Frederico et al., 1990; Lindahl, 1979; Lindahl and Nyberg, 1974). In single-stranded DNA, cytosine deamination and depurination proceed at similar rates.