| Literature DB >> 9023958 |
V Sanchis1, H Agaisse, J Chaufaux, D Lereclus.
Abstract
A TnpI-mediated site-specific recombination system to construct genetically modified Bacillus thuringiensis strains was developed. Recombinant B. thuringiensis strains from which antibiotic resistance genes can be selectively eliminated were obtained in vivo with a new vector based on the specific resolution site of transposon Tn4430. For example, a cryIC gene, whose product is active against Spodoptera littoralis, was introduced into B. thuringiensis Kto harboring a cryIA(c) gene active against Ostrinia nubilalis. The resulting strain had a broader activity spectrum than that of the parental strain. It contained only B. thuringiensis DNA and was free of antibiotic resistance genes. This should facilitate regulatory approval for its development as a commercial biopesticide.Entities:
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Year: 1997 PMID: 9023958 PMCID: PMC168370 DOI: 10.1128/aem.63.2.779-784.1997
Source DB: PubMed Journal: Appl Environ Microbiol ISSN: 0099-2240 Impact factor: 4.792