Document Type : Research Paper
Department of Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran.
Faculty of Medicine and Health Sciences, Macquarie University, NSW, Australia.
Department of Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran
Chemistry & Chemical Engineering Research Center of Iran (CCERCI), Pazhouhesh Blvd., 17th Km of Tehran-Karaj Highway,1496813151 Tehran, Iran.
Background: Drug discovery process is growing considerably due to the noteworthy resource of natural products. Persipeptides A and B are cyclopeptide antibiotics, which are produced by Streptomyces zagrosensis UTMC 1154. Although extraction of culture broth with the help of solvent has been optimized previously, no effort for in-situ extraction of persipeptides has been done yet.
Objective: To produce a high quantity of persipeptides for further drug evaluation, it is crucial to design approaches aimed at improvement of the extraction yield.
Materials and Methods: Amberlite XAD-16N was employed into the fermentation culture medium of S. zagrosensis in order to enhance the in-situ extraction of persipeptides. Effects of resin content (%), resin addition time (h), and fermentation time (day) were investigated by a two-level full factorial experimental design.
Results: The main factors of resin content (%) and the interaction of resin content (%) with resin addition time (day) were found to be important using ANOVA. The results showed the amount of 0.33 % (w.v-1) amberlite XAD-16N added at 27.2 h post-inoculation was the most effective combination to increase the efficiency of in-situ adsorption capacity of persipeptides.
Conclusions: The provided method requires 3.3 g resin and 200 mL methanol for the extraction of persipeptides from each liter of fermentation culture of S. zagrosensis in less than 15 min. Apart from cost-efficiently and simplicity, this procedure enhanced the recovery of persipeptides by 7 % and 3 times, compared to ISP2 medium without any resin after 4 and 7 days of fermentation, respectively. Therefore, this method can be regarded as a cost-efficient enhancement approach for the production of these newly-discovered metabolites before implementing the genetic manipulation or intensive media optimization, demanding considerable time and effort.