Journal of Microbiology

The Microbiological Society of Korea (한국미생물학회)
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Meroparamycin Production by Newly Isolated Streptomyces sp. Strain MAR01: Taxonomy, Fermentation, Purification and Structural Elucidation

  • El-Naggar Moustafa Y. (Botany Department, Microbiology Division, Faculty of Science, Alexandria University) ;
  • El-Assar Samy A. (Botany Department, Microbiology Division, Faculty of Science, Alexandria University) ;
  • Abdul-Gawad Sahar M. (Botany Department, Microbiology Division, Faculty of Science, Alexandria University)
  • Published : 2006.08.01
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Abstract

Twelve actinomycete strains were isolated from Egyptian soil. The isolated actinomycete strains were then screened with regard to their potential to generate antibiotics. The most potent of the producer strains was selected and identified. The cultural and physiological characteristics of the strain identified. the strain as a member of the genus Streptomyces. The nucleotide sequence of the 16S rRNA gene (1.5kb) of the most potent strain evidenced a 99% similarity with Streptomyces spp. and S. aureofaciens 16S rRNA genes, and the isolated strain was ultimately identified as Streptomyces sp. MAR01. The extraction of the fermentation broth of this strain resulted in the isolation of one major compound, which was active in vitro against gram-positive, gram-negative representatives and Candida albicans. The chemical structure of this bioactive compound was elucidated based on the spectroscopic data obtained from the application of MS, IR, UV, $^1H$ NMR, $^{13}C$ NMR, and elemental analysis techniques. Via comparison to the reference data in the relevant literature and in the database search, this antibiotic, which had a molecular formula of $C_{19}H_{29}NO_2$ and a molecular weight of 303.44, was determined to differ from those produced by this genus as well as the available known antibiotics. Therefore, this antibiotic was designated Meroparamycin.

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