IncP plasmids are most effective in mediating conjugation between Escherichia coli and streptomycetes

IncP plasmids are most effective in mediating conjugation between Escherichia coli and... Mobilizable shuttle plasmids containing the origin of transfer (oriT) region of plasmid F (IncFI), ColIb-P9 (IncI1), and RP4/RP1 (IncPα) were constructed to test the ability of the cognate conjugation system to mediate gene transfer from Escherichia coli to Streptomyces. The conjugative system of the IncPα plasmids was shown to be most effective in conjugative transfer, giving peak values of (2.7 ± 0.2) × 10−2 S. lividans TK24 exconjugants per recipient cell. To assess whether the mating-pair formation system or the DNA-processing apparatus of the IncPα plasmids is crucial in conjugative transfer, an assay with an IncQ-based mobilizable plasmid (RSF1010) specifying its own DNA-processing system was developed. Only the IncPα plasmid mobilized the construct to S. lividans indicating that the mating-pair formation system is primarly responsible for the promiscuous transfer of the plasmids between E. coli and Streptomyces. Dynamic of conjugative transfer from E. coli to S. lividans was investigated and exconjugants starting from the first hour of mating were obtained. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

IncP plasmids are most effective in mediating conjugation between Escherichia coli and streptomycetes

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Publisher
Springer Journals
Copyright
Copyright © 2006 by Pleiades Publishing, Inc.
Subject
Biomedicine; Microbial Genetics and Genomics; Animal Genetics and Genomics; Human Genetics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1134/S1022795406050036
Publisher site
See Article on Publisher Site

Abstract

Mobilizable shuttle plasmids containing the origin of transfer (oriT) region of plasmid F (IncFI), ColIb-P9 (IncI1), and RP4/RP1 (IncPα) were constructed to test the ability of the cognate conjugation system to mediate gene transfer from Escherichia coli to Streptomyces. The conjugative system of the IncPα plasmids was shown to be most effective in conjugative transfer, giving peak values of (2.7 ± 0.2) × 10−2 S. lividans TK24 exconjugants per recipient cell. To assess whether the mating-pair formation system or the DNA-processing apparatus of the IncPα plasmids is crucial in conjugative transfer, an assay with an IncQ-based mobilizable plasmid (RSF1010) specifying its own DNA-processing system was developed. Only the IncPα plasmid mobilized the construct to S. lividans indicating that the mating-pair formation system is primarly responsible for the promiscuous transfer of the plasmids between E. coli and Streptomyces. Dynamic of conjugative transfer from E. coli to S. lividans was investigated and exconjugants starting from the first hour of mating were obtained.

Journal

Russian Journal of GeneticsSpringer Journals

Published: May 15, 2006

References

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