Genetic analysis of the DnaA-dependent priming in the initiation of lagging strand DNA synthesis of plasmid pUB110 in Bacillus subtilis.
Derivatives of Bacillus subtilis plasmid pUB110 lacking the major lagging strand replication origin (ssoU-) accumulate intracellular single-strand circular (SS(c)) DNA intermediates and are unable to propagate in dnaB and dnaD hosts. DnaA-dependent priming requires a DnaA box in a stable hairpin form; a higher copy number of a DnaA box is not sufficient as a signal for the conversion of the SS(c) into its dsDNA form. The introduction into the plasmid of a hairpin structure, whose stem carries a DnaA box, mediates conversion of SS(c) into dsDNA and makes plasmid replication independent of the B. subtilis dnaB function. This conversion signal has been termed ssoA.
Max-Planck-Institut für molekulare Genetik, Berlin, FRG.
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Langer
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JC
Alonso
D001412:Bacillus subtilis / Q000235:genetics*; D001426:Bacterial Proteins / Q000502:physiology*; D001483:Base Sequence; D004261:DNA Replication; D004269:DNA, Bacterial / Q000096:biosynthesis*; D004268:DNA-Binding Proteins / Q000502:physiology*; D008969:Molecular Sequence Data; D010957:Plasmids
D001426:Bacterial Proteins; D004269:DNA, Bacterial; D004268:DNA-Binding Proteins; C066312:DnaA protein, Bacteria