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- Screening of Mutant Strain Streptomyces mediolani sp. AC37 for (-)-8-O-Methyltetrangomycin Production Enhancement
- Jakeline Trejos Jiménez , Maria Sturdíková , Vlasta Brezová , Emil Svajdlenka , Marta Novotová
- J. Microbiol. 2012;50(6):1014-1023. Published online December 30, 2012
- DOI: https://doi.org/10.1007/s12275-012-2025-5
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Abstract
- Streptomyces mediolani sp. AC37 was isolated from the root system of higher plant Taxus baccata and produced metabolite identified as (-)-8-O-methyltetrangomycin according to LC/MS/MS analysis. In our screening program for improvements of bioactive secondary metabolites from plant associate streptomycetes, mutation was used as a tool for the induction of genetic variations for selection of higher (-)-8-O-methyltetrangomycin producers of isolates. S. mediolani sp. AC37 was treated with UV irradiation and chemical mutagenic treatment (N-nitroso-N-methyl-urea). The radical scavenging and antioxidant capacity of (-)-8-O-methyltetrangomycin and extracts isolated from mutants were tested using EPR spin trapping technique and ABTS+ assay. Comparison of electron microscopic images of Streptomyces sp. AC37 and mutant strains of Streptomyces sp. AC37 revealed substantial differences in morphology and ultrastructure.
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