Further evidence that transposition of Tn5 in Escherichia coli is strongly enhanced by constitutively activated RecA proteins.

Journal Article (Journal Article)

We have shown that excision and transposition of Tn5 in Escherichia coli are greatly increased by recA(Prtc) genes, which encode constitutively activated RecA proteins (C.-T. Kuan, S.-K. Liu, and I. Tessman, Genetics 128:45-57, 1991). Contrary results, showing a significant decrease in Tn5 transposition under SOS conditions, were subsequently reported (M. D. Weinreich, J. C. Makris, and W. S. Reznikoff, J. Bacteriol. 173:6910-6918, 1991). We have extended our studies to examine the following: (i) transposition of Tn5 from sites in the phoA, phoB, proC, trpD, and ilvD genes; (ii) the effect of gene transcription; (iii) the comparative effect of dinD+ and dinD(Def) alleles; (iv) the use of a mating-out assay of transposition; (v) the effect of a recA(Prtc) allele located at the normal chromosomal site; and (vi) the effect at 41.5 degrees C of the recA441(Prtc) allele. The new results fully confirm our previous conclusions, including the fact that the frequency of Tn5 transposition under constitutive SOS conditions is site dependent.

Full Text

Duke Authors

Cited Authors

  • Kuan, CT; Tessman, I

Published Date

  • November 1992

Published In

Volume / Issue

  • 174 / 21

Start / End Page

  • 6872 - 6877

PubMed ID

  • 1328165

Pubmed Central ID

  • PMC207365

International Standard Serial Number (ISSN)

  • 0021-9193

Digital Object Identifier (DOI)

  • 10.1128/jb.174.21.6872-6877.1992


  • eng

Conference Location

  • United States