<strong>Characterization and Optimization of Biosynthesis of Bioactive Secondary Metabolites Produced by <em>Streptomyces</em> sp. 8812</strong>
Journal Title: Polish Journal of Microbiology - Year 2016, Vol 65, Issue 1
Abstract
The nutritional requirements and environmental conditions for a submerged culture of [i]Streptomyces[/i] sp. 8812 were determined. Batch and fed-batch [i]Streptomyces [/i]sp. 8812 fermentations were conducted to obtain high activity of secondary metabolites. In the study several factors were examined for their influence on the biosynthesis of the active metabolites-7-hydroxy-6-oxo-2,3,4,6-tetrahydroisoquinoline-3-carboxyl acid (C[sub]10[/sub]H[sub]9[/sub]NO[sub]4[/sub]) and N-acetyl-3,4-dihydroxy-l-phenylalanine (C[sub]11[/sub]H[sub]13[/sub]NO[sub]5[/sub]): changes in medium composition, pH of production medium, various growth phases of seed culture, amino acid supplementation and addition of anion exchange resin to the submerged culture. Biological activities of secondary metabolites were examined with the use of dd-carboxypeptidase 64–575 and horseradish peroxidase. [i]Streptomyces[/i] sp. 8812 mycelium was evaluated under fluorescent microscopy and respiratory activity of the strain was analyzed. Moreover, the enzymatic profiles of the strain with the use of Api[sup]®[/sup]ZYM test were analyzed and genetic analysis made. Phylogenetic analysis of [i]Streptomyces[/i] sp. 8812 revealed that its closest relative is [i]Streptomyces capoamus[/i] JCM 4734 (98%), whereas sequence analysis for 16S rRNA gene using NCBI BLAST algorithm showed 100% homology between these two strains. Biosynthetic processes, mycelium growth and enzyme inhibitory activities of these two strains were also compared.
Authors and Affiliations
Aleksandra Rajnisz, Adam Guśpiel, Magdalena Postek, Joanna Ziemska, Anna Laskowska, Daniel Rabczenko, Jolanta Solecka
Keywords
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