Metabolite profile of marine-derived endophytic Streptomyces sundarbansensis WR1L1S8 by liquid chromatography–mass spectrometry and evaluation of culture conditions on antibacterial activity and mycelial growth
Article first published online: 11 NOV 2013
© 2013 The Society for Applied Microbiology
Journal of Applied Microbiology
Volume 116, Issue 1, pages 39–50, January 2014
How to Cite
Djinni, I., Defant, A., Kecha, M. and Mancini, I. (2014), Metabolite profile of marine-derived endophytic Streptomyces sundarbansensis WR1L1S8 by liquid chromatography–mass spectrometry and evaluation of culture conditions on antibacterial activity and mycelial growth. Journal of Applied Microbiology, 116: 39–50. doi: 10.1111/jam.12360
- Issue published online: 16 DEC 2013
- Article first published online: 11 NOV 2013
- Accepted manuscript online: 7 OCT 2013 03:05AM EST
- Manuscript Accepted: 1 OCT 2013
- Manuscript Revised: 26 SEP 2013
- Manuscript Received: 19 JUL 2013
- Erasmus Mundus–Averroes
- LC-MS analysis;
This study was designed to investigate whether culture conditions (media, seawater concentration and pH) could lead Streptomyces sundarbansensis strain (isolated from marine brown algae Fucus sp. collected from Algerian coastline) to produce bioactive secondary metabolites. The most favourable condition for the production of anti-MRSA compound 1 [2-hydroxy-5-((6-hydroxy-4-oxo-4H-pyran-2-yl)methyl)-2-propylchroman-4-one] was determined.
Methods and Results
The profile of metabolites present in the crude extracts was carried out by HPLC analysis equipped with a diode array detector evaporative light scattering detection (DAD-ELSD) or online coupled to electrospray ionization–mass spectrometry (ESI-MS). Compound 1 was the most abundant secondary metabolite by culturing the strains on starch casein agar (SCA) medium in freshwater or 50% seawater at pH 7 or 9 using agar-state fermentation method.
The study has shown the efficiency of HPLC/ESI-MS technique in the analysis of polyketides produced by the strain under investigation. It was possible to establish the best culture conditions for obtaining the most bioactive compound 1, previously isolated by the same strain.
Significance and Impact of the Study
Marine algae–actinobacteria associations are a particularly promising renewable system for the production of new antibacterial metabolites. Based on the promising bioactivity of the chemically characterized compound 1, the analytical methodology here applied has resulted as an effective approach for establishing its optimized production.