Abstract
Genetic analysis of 131 independent transpositions of the tetracycline-resistance element Tn10 from a single site in phage P22 into the histidine operon of Salmonella typhimurium reveals that Tn10 insertions are not randomly distributed along this chromosomal target. The insertions occur in 22 different "clusters"; insertions within each cluster are very tightly linked in recombination tests. Tn10 insertions are not evenly distributed among the identified clusters. The existence of these clusters suggests that this chromosomal target contains particular genetic signals that guide Tn10 to particular preferred positions for insertion. Insertions within each cluster occur in both orientations with roughly equal frequency.—The relationship among different insertions within each cluster has been examined. The resolution of genetic mapping places an upper limit of about 50 basepairs on the distance between different insertions within a cluster. Different insertions within a cluster usually have the same reversion frequency; however, heterogeneity in reversion frequency has been detected in at least two clusters. For most clusters, the available data are consistent with the simple possibility that all insertions within a cluster are at identical positions; however, the data do not exclude other possibilities.
Full Text
The Full Text of this article is available as a PDF (1.1 MB).
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Botstein D. Synthesis and maturation of phage P22 DNA. I. Identification of intermediates. J Mol Biol. 1968 Jun 28;34(3):621–641. doi: 10.1016/0022-2836(68)90185-x. [DOI] [PubMed] [Google Scholar]
- Chan R. K., Botstein D., Watanabe T., Ogata Y. Specialized transduction of tetracycline resistance by phage P22 in Salmonella typhimurium. II. Properties of a high-frequency-transducing lysate. Virology. 1972 Dec;50(3):883–898. doi: 10.1016/0042-6822(72)90442-4. [DOI] [PubMed] [Google Scholar]
- Chumley F. G., Menzel R., Roth J. R. Hfr formation directed by tn10. Genetics. 1979 Apr;91(4):639–655. doi: 10.1093/genetics/91.4.639. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Daniell E., Roberts R., Abelson J. Mutations in the lactose operon caused by bacteriophage Mu. J Mol Biol. 1972 Aug 14;69(1):1–8. doi: 10.1016/0022-2836(72)90019-8. [DOI] [PubMed] [Google Scholar]
- Foster T. J. Insertion of the tetracycline resistance translocation unit Tn10 in the lac operon of Escherichia coli K12. Mol Gen Genet. 1977 Sep 9;154(3):305–309. doi: 10.1007/BF00571287. [DOI] [PubMed] [Google Scholar]
- Kleckner N. Translocatable elements in procaryotes. Cell. 1977 May;11(1):11–23. doi: 10.1016/0092-8674(77)90313-0. [DOI] [PubMed] [Google Scholar]
- Pfeifer D., Hirsch H. J., Bergmann D., Hamlaoui M. Non-random distribution of deletion endpoints in the gal operon of E. coli. Mol Gen Genet. 1974;132(3):203–213. doi: 10.1007/BF00269393. [DOI] [PubMed] [Google Scholar]
- Rubens C., Heffron F., Falkow S. Transposition of a plasmid deoxyribonucleic acid sequence that mediates ampicillin resistance: independence from host rec functions and orientation of insertion. J Bacteriol. 1976 Oct;128(1):425–434. doi: 10.1128/jb.128.1.425-434.1976. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Shimada K., Weisberg R. A., Gottesman M. E. Prophage lambda at unusual chromosomal locations. II. Mutations induced by bacteriophage lambda in Escherichia coli K12. J Mol Biol. 1973 Oct 25;80(2):297–314. doi: 10.1016/0022-2836(73)90174-5. [DOI] [PubMed] [Google Scholar]
- Smith H. O., Levine M. A phage P22 gene controlling integration of prophage. Virology. 1967 Feb;31(2):207–216. doi: 10.1016/0042-6822(67)90164-x. [DOI] [PubMed] [Google Scholar]
- Starlinger P., Saedler H. IS-elements in microorganisms. Curr Top Microbiol Immunol. 1976;75:111–152. doi: 10.1007/978-3-642-66530-1_4. [DOI] [PubMed] [Google Scholar]
- Weinstock G. M., Botstein D. Regional specificity of illegitimate recombination associated with the translocatable ampicillin-resistance element Tn1. Cold Spring Harb Symp Quant Biol. 1979;43(Pt 2):1209–1215. doi: 10.1101/sqb.1979.043.01.137. [DOI] [PubMed] [Google Scholar]