Crystal structure of MboIIA methyltransferase.
Osipiuk, J., Walsh, M.A., Joachimiak, A.(2003) Nucleic Acids Res 31: 5440-5448
- PubMed: 12954781 
- DOI: 10.1093/nar/gkg713
- Primary Citation of Related Structures:  
1G60 - PubMed Abstract: 
DNA methyltransferases (MTases) are sequence-specific enzymes which transfer a methyl group from S-adenosyl-L-methionine (AdoMet) to the amino group of either cytosine or adenine within a recognized DNA sequence. Methylation of a base in a specific DNA sequence protects DNA from nucleolytic cleavage by restriction enzymes recognizing the same DNA sequence ...