Efficient expression of the mosquito larvicidal binary toxin gene from Bacillus sphaericus in Escherichia coli
| Autor: | Sutipa Tanapongpipat, Patcharee Promdonkoy, Plearnpis Luxananil, Boonhiang Promdonkoy, Sakol Panyim, Mongkon Audtho, Namchai Chewawiwat |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Insecticides
Operon Recombinant Fusion Proteins Bacterial Toxins Immunoblotting Gene Expression medicine.disease_cause Applied Microbiology and Biotechnology Microbiology Bacillus sphaericus Gene expression medicine Escherichia coli Animals Cloning Molecular Pest Control Biological Pore-forming toxin Bacillaceae biology Toxin General Medicine biology.organism_classification Molecular biology Bacillales Recombinant Proteins Culex Protein Subunits Larva Transformation Bacterial |
| Zdroj: | Current microbiology. 47(5) |
| ISSN: | 0343-8651 |
| Popis: | The binary toxin gene encoding BinA (42 kDa) and BinB (51 kDa) from Bacillus sphaericus strain 2297 was cloned and expressed in E. coli. Low expression level was found when both proteins were expressed from a single operon. High expression was observed when the gene encoding an individual protein was placed downstream of the T7 promoter. The expression level of BinB was not different when expressed alone (non-fusion) or as a fusion form with T7 peptide (T7-BinB). Both forms of BinB were equally stable. Unlike BinB, the non-fusion form of BinA was less stable than T7-BinA. The mosquito larvicidal test showed that BinA or BinB alone was not toxic to mosquito larvae, but high toxicity was found when both BinA and BinB were applied. The results suggest that a short peptide of T7 linked to the N-terminus of either BinA or BinB does not affect their toxicity, but may make the toxin, especially BinA, more stable. |
| Databáze: | OpenAIRE |
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