5-methylcytosine mutation of DNA (DNA methylation) leads to
DNA methylation is essential for enthralling a number of the cellular process including transcription, genomic imprinting, developmental regulation, mutagenesis, DNA repair and chromatin organization.
DNA methylation also protects DNA from bacteria's own restriction enzymes.
Deamination of 5-methylcytosine forms thymine, this can result in transition mutation.
Deamination to thymine
DNA repair
Methylation protects the host DNA from cleavage by its own restriction enzyme
All of these