Skip to main content
NCBI home page
Journal of Bacteriology logoLink to Journal of Bacteriology
. 1978 Feb;133(2):485–491. doi: 10.1128/jb.133.2.485-491.1978

Requirements for suppression of a dnaG mutation by an I-type plasmid.

C Sasakawa, M Yoshikawa
PMCID: PMC222049  PMID: 342493

Abstract

We have confirmed and further characterized the phenomenon of suppression of a dnaG mutation by an I plasmid and determined the requirements for the complete expression of suppressibility. The authentic derepressed mutation of the conjugal fertility system, described earlier, was shown to be one of the requirements. The second requirement is a previously undescribed type of mutation leading to a far higher degree of derepression of this system than the authentic drd mutation. This second mutation leads to extremely high conjugal fertility and pilus production. A third requirement for the complete expression of suppressibility is that the host recA function remain intact. recA function is required not merely for the fulfillment of the other two requirements described above, but also for an additional step or steps leading to its complete expression. The nature of this step(s) is unknown, but it is not insertion of the plasmid into the host genome.

Full text

PDF
485

Selected References

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

  1. Ames B. N., Durston W. E., Yamasaki E., Lee F. D. Carcinogens are mutagens: a simple test system combining liver homogenates for activation and bacteria for detection. Proc Natl Acad Sci U S A. 1973 Aug;70(8):2281–2285. doi: 10.1073/pnas.70.8.2281. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Bachmann B. J., Low K. B., Taylor A. L. Recalibrated linkage map of Escherichia coli K-12. Bacteriol Rev. 1976 Mar;40(1):116–167. doi: 10.1128/br.40.1.116-167.1976. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Bouché J. P., Zechel K., Kornberg A. dnaG gene product, a rifampicin-resistant RNA polymerase, initiates the conversion of a single-stranded coliphage DNA to its duplex replicative form. J Biol Chem. 1975 Aug 10;250(15):5995–6001. [PubMed] [Google Scholar]
  4. Chen P. L., Carl P. L. Genetic map location of the Escherichia coli dnaG gene. J Bacteriol. 1975 Dec;124(3):1613–1614. doi: 10.1128/jb.124.3.1613-1614.1975. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Edwards S., Meynell G. G. General method for isolating de-repressed bacterial sex factors. Nature. 1968 Aug 24;219(5156):869–870. doi: 10.1038/219869a0. [DOI] [PubMed] [Google Scholar]
  6. Hirota Y. THE EFFECT OF ACRIDINE DYES ON MATING TYPE FACTORS IN ESCHERICHIA COLI. Proc Natl Acad Sci U S A. 1960 Jan;46(1):57–64. doi: 10.1073/pnas.46.1.57. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Hughes C., Meynell G. G. Rapid screening for plasmid DNA. Mol Gen Genet. 1977 Mar 7;151(2):175–179. doi: 10.1007/BF00338692. [DOI] [PubMed] [Google Scholar]
  8. LENNOX E. S. Transduction of linked genetic characters of the host by bacteriophage P1. Virology. 1955 Jul;1(2):190–206. doi: 10.1016/0042-6822(55)90016-7. [DOI] [PubMed] [Google Scholar]
  9. Lark K. G. Genetic control over the initiation of the synthesis of the short deoxynucleotide chains in E. coli. Nat New Biol. 1972 Dec 20;240(103):237–240. doi: 10.1038/newbio240237a0. [DOI] [PubMed] [Google Scholar]
  10. Louarn J. M. Size distribution and molecular polarity of nascent DNA in a temperature-sensitive dna G mutant of Escherichia coli. Mol Gen Genet. 1974;133(3):193–200. doi: 10.1007/BF00267668. [DOI] [PubMed] [Google Scholar]
  11. MacPhee D. G. Effect of rec mutations on the ultraviolet protecting and mutation-enhancing properties of the plasmid R-Utrecht in Salmonella typhimurium. Mutat Res. 1973 Sep;19(3):357–359. doi: 10.1016/0027-5107(73)90237-6. [DOI] [PubMed] [Google Scholar]
  12. McCann J., Spingarn N. E., Kobori J., Ames B. N. Detection of carcinogens as mutagens: bacterial tester strains with R factor plasmids. Proc Natl Acad Sci U S A. 1975 Mar;72(3):979–983. doi: 10.1073/pnas.72.3.979. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Meynell E., Datta N. Mutant drug resistant factors of high transmissibility. Nature. 1967 May 27;214(5091):885–887. doi: 10.1038/214885a0. [DOI] [PubMed] [Google Scholar]
  14. Nishimura Y., Caro L., Berg C. M., Hirota Y. Chromosome replication in Escherichia coli. IV. Control of chromosome replication and cell division by an integrated episome. J Mol Biol. 1971 Feb 14;55(3):441–456. doi: 10.1016/0022-2836(71)90328-7. [DOI] [PubMed] [Google Scholar]
  15. Novick R. P., Clowes R. C., Cohen S. N., Curtiss R., 3rd, Datta N., Falkow S. Uniform nomenclature for bacterial plasmids: a proposal. Bacteriol Rev. 1976 Mar;40(1):168–189. doi: 10.1128/br.40.1.168-189.1976. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Wechsler J. A., Gross J. D. Escherichia coli mutants temperature-sensitive for DNA synthesis. Mol Gen Genet. 1971;113(3):273–284. doi: 10.1007/BF00339547. [DOI] [PubMed] [Google Scholar]
  17. Wickner S., Wright M., Hurwitz J. Studies on in vitro DNA synthesis. Purification of the dna G gene product from Escherichia coli. Proc Natl Acad Sci U S A. 1973 May;70(5):1613–1618. doi: 10.1073/pnas.70.5.1613. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Wilkins B. M. Partial suppression of the phenotype of Escherichia coli K-12 dnaG mutants by some I-like conjugative plasmids. J Bacteriol. 1975 Jun;122(3):899–904. doi: 10.1128/jb.122.3.899-904.1975. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Witkin E. M. Thermal enhancement of ultraviolet mutability in a dnaB uvrA derivative of Escherichia coli B/r: evidence for inducible error-prone repair. Basic Life Sci. 1975;5A:369–378. doi: 10.1007/978-1-4684-2895-7_49. [DOI] [PubMed] [Google Scholar]
  20. Witkin E. M. Ultraviolet mutagenesis and inducible DNA repair in Escherichia coli. Bacteriol Rev. 1976 Dec;40(4):869–907. doi: 10.1128/br.40.4.869-907.1976. [DOI] [PMC free article] [PubMed] [Google Scholar]

Articles from Journal of Bacteriology are provided here courtesy of American Society for Microbiology (ASM)

RESOURCES