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. 1979 Mar;29(3):840–845. doi: 10.1128/jvi.29.3.840-845.1979

Replication of bacteriophage phiK duplex replicative-form DNA in dnaB and dnaC mutants of Escherichia coli.

L B Dumas, D T Benesh
PMCID: PMC353242  PMID: 376873

Abstract

We have directly tested the effects of host cell DNA synthesis mutations on bacteriophage phiK replicative-form (RF) DNA replication in vivo. We observed that phiK RF DNA replication continued at normal rates in both dnaB and dnaC mutant hosts under conditions in which the activities of the dnaB and dnaC gene products were shown to be markedly reduced. This suggests that these two host proteins are not essential for normal phiK RF DNA replication. In control experiments we observed markedly reduced rates of phiK RF DNA replication in temperature-sensitive dnaG and dnaE host mutants, indicating that the products of these genes are essential. Thus, the mechanism of DNA chain initiation in vivo on the duplex RF DNA templates of isometric phages such as phiK apparently is different from that on the similar templates of isometric phages such as phiX174. The implications of this difference are discussed in the text.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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