A methyltransferase also known as a methylase is a type of transferase enzyme that transfers a methyl group from a donor to an acceptor.
Methylation often occurs on nucleic bases in DNA or amino acids in protein structures. Methytransferases use a reactive methyl group bound to sulfur in S-adenosyl methionine (SAM) as the methyl donor.
Read more about Methyltransferase: Function, Clinical Significance, Examples