Summary
Recombinant lambda phages containing the genes for dnaZ protein (the γ subunit of DNA polymerse III holoenzyme), primase (dnaG protein) and dnaC protein from Escherichi coli and Salmonella typhimurium were isolated. Each gene cloned from S. typhimurium has extensive DNA sequence homology to the corresponding E. coli gene. Clones selected by complementation of a dnaA temperature-sensitive mutant appear similar to other isolated suppressors of dnaA (Projan and Wechsler 1981). Derivatives of each cloned fragment suitable for overproduction of the protein were constructed. Of those tested, only the phage containing the E. coli dnaZ gene resulted in significant overproduction.
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Abbreviations
- DTT:
-
dithiothreitol
- Ec:
-
Escherichia coli
- EDTA:
-
ethylene diamine tetra acetic acid
- kb:
-
kilobase 1,000 bases or base-pairs
- moi:
-
multiplicity of infection
- pol I:
-
E. coli DNA polymerase I
- pol III holoenzyme:
-
E. coli DNA polymerase III holoenzyme
- pri:
-
dnaG, primase-coding gene
- SSB:
-
single-strand binding protein
- St:
-
Salmonella typhimurium
- sup :
-
gene coding for suppressor
- ts:
-
temperature-sensitive
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Communicated by H.W. Boyer
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Rowen, L., Kobori, J.A. & Scherer, S. Cloning of bacterial DNA replication genes in bacteriophage λ. Molec Gen Genet 187, 501–509 (1982). https://doi.org/10.1007/BF00332635
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DOI: https://doi.org/10.1007/BF00332635