TOL plasmid in Pseudomonas aeruginosa PAO: thermosensitivity of self-maintenance and inhibition of host cell growth.
AUTOR(ES)
Nakazawa, T
RESUMO
The TOL plasmid originally isolated in Pseudomonas putida (arvilla) mt-2 was transmissible to strains of the fluorescens group of Pseudomonas, i.e., P. putida, P. fluorescens, and P. aeruginosa, except for a strain of P. aeruginosa, strain PAO. The same strain, however, could accept the plasmid when its restriction and modification abilities were lost by mutations or by growing at high temperature. In addition, the transmissibility of the TOL plasmid from strain PAO to P. putida was low when the plasmid was modified by the donor. By using P. aeruginosa PAO carrying the TOL plasmid, the stability and genetic expression of the plasmid as well as its effect on the host cell growth were examined. Thus the self-maintenance of the plasmid was found to be thermosensitive. Furthermore, the TOL plasmid inhibited the growth of strain PAO at high temperature, accompanied by the formation of some filamentous cells. These thermosensitive properties of the TOL plasmid were host dependent and not exhibited in another strain of P. aeruginosa.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=222054Documentos Relacionados
- Plasmid mutations affecting self-maintenance and host growth in Escherichia coli.
- Indirect selection for plasmid mutants: isolation of ColVBtrp mutants defective in self-maintenance in Escherichia coli.
- Imipenem resistance in pseudomonas aeruginosa PAO: mapping of the OprD2 gene.
- Development of broad-host-range vectors and gene banks: self-cloning of the Pseudomonas aeruginosa PAO chromosome.
- Substrate specificity of catechol 2,3-dioxygenase encoded by TOL plasmid pWW0 of Pseudomonas putida and its relationship to cell growth.