title: In vitro replication of a dam methylated and non-methylated ori-C plasmid.
abstract: We have examined the replication of a dam methylated and non-methylated ori-C plasmid in an in vitro ori-C dependent replication system. The results show that the non-methylated plasmid is 50% to 80% less efficient in the initiation of DNA synthesis; that the methylation state of the plasmid does not change the site of initiation at ori-C, and that in both cases initiation at this region requires the presence of exogenously furnished dnaA protein.
mesh_terms: D001426:Bacterial Proteins / Q000378:metabolism; D004261:DNA Replication; D004262:DNA Restriction Enzymes; D004269:DNA, Bacterial / Q000096:biosynthesis*; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000235:genetics; D008745:Methylation; D009154:Mutation; D010957:Plasmids; D014176:Protein Biosynthesis
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial; D004262:DNA Restriction Enzymes