We describe here the construction of a new version of the Escherichia coli-Streptomyces shuttle
cloning vector pIJ6902, which carries the original thiostrepton-inducible PtipA as well as the
integrative and cloning systems, but with the E. coli low copy number replication control of the F
(fertility) factor. The rationale of this construct was to provide a shuttle cloning vector enabling the
cloning of genes whose expression is toxic in E. coli while keeping the efficient regulated expression
system for Streptomyces as its ascendant vector pIJ6902. This new vector named pDYN6902
(10,975 bp) showed a copy-number reduced 12 times compared to that of pIJ6902 and indeed a
decreased expression of the cloned gene. It was also shown to allow the successful cloning in E. coli
of a deleterious gene, i.e. I-SceI meganuclease encoding gene.