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. 1983 Mar 11;11(5):1309–1323. doi: 10.1093/nar/11.5.1309

Factors involved in the initiation of phage phi 29 DNA replication in vitro: requirement of the gene 2 product for the formation of the protein p3-dAMP complex.

L Blanco, J A Garcìa, M A Peñalva, M Salas
PMCID: PMC325798  PMID: 6402761

Abstract

To study the requirements for the in vitro formation of the protein p3-dAMP complex, the first step in phi29 DNA replication, extracts from B. subtilis infected with phi29 mutants in genes 2, 3, 5, 6 and 17, involved in DNA synthesis, have been used. The formation of the initiation complex is completely dependent on the presence of a functional gene 2 product, in addition to protein p3 and phi29 DNA-protein p3 as template. ATP is also required, although it can be replaced by other nucleotides. The products of genes 5, 6 and 17 do not seem to be needed in the formation of the initiation complex. Inhibitors of the host DNA polymerase III, DNA gyrase or RNA polymerase had no effect on the formation of the protein p3-dAMP complex, suggesting that these proteins are not involved in the initiation of phi29 DNA replication. ddATP or aphidicolin, inhibitors of DNA chain elongation, had also no effect on the formation of the initiation complex.

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Selected References

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