title: DNA methyltransferases affecting the sequence 5'CCGG.
abstract: B. subtilis phage SPbeta and Moraxella sp. code for DNA methyltransferases which methylate both cytosines of the sequence 5'CCGG. Experiments using a B. subtilis strain whose DNA is sensitive to HpaII and resistant to MspI degradation, indicated that methylation of the outer C of this sequence provides protection against the restriction enzyme MspI.
mesh_terms: D001412:Bacillus subtilis / Q000201:enzymology* / Q000235:genetics; D001435:Bacteriophages / Q000201:enzymology* / Q000235:genetics; D001483:Base Sequence; D004248:DNA (Cytosine-5-)-Methyltransferases / Q000235:genetics*; D004262:DNA Restriction Enzymes; D004269:DNA, Bacterial / Q000235:genetics*; D008780:Methyltransferases / Q000235:genetics*; D009016:Moraxella / Q000201:enzymology* / Q000235:genetics; D013379:Substrate Specificity
chemical_list: D004269:DNA, Bacterial; D008780:Methyltransferases; D004248:DNA (Cytosine-5-)-Methyltransferases; D004262:DNA Restriction Enzymes