Synthesis of N-acyl homoserine lactones and phenazines, some enzymatic activities, and fungicidal activity in the cells of Pseudomonas chlororaphis 449 with inactivated rpoS gene
| Autor: | E. E. Atamova, V. A. Lipasova, Inessa A. Khmel |
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| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
Acyl-Homoserine Lactones biology Homoserine Pseudomonas chlororaphis biology.organism_classification Microbiology chemistry.chemical_compound Infectious Diseases Enzyme chemistry Biochemistry Virology RNA polymerase Genetics biology.protein Lipase Molecular Biology rpoS Bacteria |
| Zdroj: | Molecular Genetics, Microbiology and Virology. 24:7-11 |
| ISSN: | 1934-841X 0891-4168 |
| DOI: | 10.3103/s0891416809010029 |
| Popis: | The inactivation of the rpoS gene, which encodes the sigma S subunit of RNA polymerase of rhizospheric strain Pseudomonas chlororaphis 449 results in a drastic (5–8-fold) decrease in the synthesis of phenazine antibiotics, a decline in the acid and alkaline phosphatase activities (pH 2.5 and 8.8, respectively), and the antagonistic activity of this strain against phytopathogenic fungus Rhizoctonia solani. A mutation in the rpoS gene also causes a minor decrease of lipase and proteolytic activity in the supernatants of Pseudomonas chlororaphis 449 and has no substantial effect on the synthesis of three types of N-acyl homoserine lactones, the signal molecules of quarum sensing regulation, and the ability of bacteria to migrate over the medium surface (swarming). |
| Databáze: | OpenAIRE |
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