title: Initiation of lambda DNA replication in vitro promoted by isolated P-gene product.
abstract: The product of the P gene of bacteriophage lambda was isolated from heat-induced lambda-lysogenic Escherichia coli cells. It was found to bind to DNA, to be devoid of nuclease activity acting on double-stranded lambda DNA and of nicking/closing activity. Initiation of lambda DNA replication promoted by the P-gene product in a complementation assay in vitro was sensitive to rifampicin. Sedimentation analysis of the products and their hybridization to separated lambda DNA strands indicate that lambda DNA was formed in a reaction similar to ring-to-ring replication in vivo. The reaction was symmetric from the beginning, i.e. both lambda DNA strands were copied without delay.
mesh_terms: D003090:Coliphages / Q000378:metabolism*; D004261:DNA Replication; D004279:DNA, Viral / Q000096:biosynthesis*; D004926:Escherichia coli / Q000378:metabolism; D005814:Genes, Viral; D005816:Genetic Complementation Test; D007700:Kinetics; D008242:Lysogeny; D008970:Molecular Weight; D014764:Viral Proteins / Q000378:metabolism*; D014779:Virus Replication
chemical_list: D004279:DNA, Viral; D014764:Viral Proteins