[Cloning and localization of the replication and mobilization regions in the D-plasmid of Pseudomonas putida pBS286 (IncP-9) with a broad host range].

: Rep-mob loci of naphthalene degradative plasmid pBS286 (IncP-9) have been cloned on the Escherichia coli vectors pUC19 and pUBR322. These loci confer to recombinant plasmids pBS952 and pBS953 the ability for effective mobilization by RP4 (IncP-1) and F plasmid, as well as constant maintenance in various gram-negative bacteria. Localization of cloned sequences in the restriction fragments of conservative part of the pBS286 genome was established. The data obtained correlate with the analysis of plasmids pBS950 and pBS951 which are spontaneous mini-derivatives of pBS286 and pBS292 (delta NPL1::Tn1/Tra+ Nah-) plasmids formed during transformation of E. coli HB101 cells. Plasmids pBS952 and pBS953 retain the incompatibility properties of parental IncP-9 replicon. These recombinant derivatives can be used for construction of bhr vectors with required properties and compatible with bhr vectors constructed on the basis of plasmids from the IncP-1 and IncP-4 groups.