Six amino acids determine the sequence-specific DNA binding and replication specificity of the initiator proteins of the pT181 family.


The replication of pT181 and related plasmids of Staphylococcus aureus proceeds by a rolling circle mechanisms. The initiator proteins encoded by the plasmids of the pT181 family have sequence-specific DNA binding and topoisomerase activities. These proteins nick one strand of the DNA at the origin of replication. The free 3'-hydroxyl end at the nick is… (More)


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