Replication of M13 duplex DNA in soluble extracts of Escherichia coli. Effect of helix-destabilising proteins.
Soluble extracts of M13-am5-infected Escherichia coli cells can carry out multiple rounds of M13 duplex DNA replication when supplemented with helix-destabilising protein of E. coli. Similarly addition of the helix-destabilising M13 gene 5 protein in low concentrations (up to 30 micrograms/ml) stimulates the replication of double-stranded M13 DNA. In contrast, higher concentrations of gene 5 protein (but not of E. coli helix-destabilising protein) cause a preferential inhibition of complementary strand synthesis resulting in a switch from double-strand replication to single-strand synthesis. Depending on the addition of the appropriate amounts of these two helix-destabilising proteins either stage of M13 DNA replication can now be studied with cell-free preparations.
D003090:Coliphages / Q000378:metabolism*; D004265:DNA Helicases / Q000378:metabolism*; D004261:DNA Replication; D004279:DNA, Viral / Q000096:biosynthesis*; D004926:Escherichia coli / Q000378:metabolism*; D007700:Kinetics
D004279:DNA, Viral; D004265:DNA Helicases