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A host-vector system for Pseudomonas aeruginosa PAO was developed. Scattered regions of the strain PAO chromosome were cloned by direct selection for complementation of auxotrophs or from a DNA gene bank which contains over 1,000 independently isolated chromosome-vector recombinant plasmids. The use of partially digested chromosomal DNA facilitated the selection of a variety of strain PAO chromosomal markers. The progenitor of the vector was a small, multicopy plasmid, pRO1600, found in a PAO strain which had acquired RP1 in a mating experiment. The bacterial host range that could be determined by transformation of vectors produced from pRO1600 resembles that for plasmid RP1. Two derivative plasmids were formed: pRO1613, for cloning DNA cleaved with restriction endonuclease PstI, and pRO1614, which was formed by deleting part of pRO1613 and fusion with plasmid pBR322. Plasmid pRO1614 utilizes known cloning sites within the tetracycline resistance region of pBR322.

Development of broad-host-range vectors and gene banks: self-cloning of the Pseudomonas aeruginosa PAO chromosome