werraensis (JQ964039) of genus Streptomyces. Results from TLC showed two fractions with different Rfvalues. The fraction with Rf value 0.385 and UV λmax at 241.99 nm in chloroform

exhibits antimicrobial activity against all the test microorganisms. The fraction with Rf value 0.256 and UV λmax at 278 nm in ethyl acetate showed higher inhibition toward Gram positive organism compared to Gram negative organisms. The reason of different sensitivity between Gram-positive and Gram-negative bacteria could be ascribed to the morphological differences between these microorganisms [16]. For further studies, the broad spectrum active fraction collected from chloroform was characterized. Partial purification process was carried out through column chromatography packed with silica gel. The purified fraction was soluble in ethyl www.selleckchem.com/products/AZD0530.html acetate, chloroform and DMSO whereas sparingly soluble in water. Growth medium supplementation with different carbon and nitrogen sources showed

better antibiotic production. The strain S. werraensis was cultivated in fermentation medium supplemented with various carbon and nitrogen sources and their effect on growth as well as antimicrobial activity Selleckchem CT99021 was studied. The strain was able to grow in all the tested carbon sources with maximum antibiotic production in medium supplemented with sucrose ( Table 2). The result shows that antibiotic production was higher in medium having sucrose (3.5%) as carbon source. The antibiotic FAD production is largely influenced by nature of carbon and nitrogen sources as reported by Vilches and group [17]. The growth as well as antibiotic production decreases with either increase or decrease of sucrose concentration.

Our result are similar to that of bioactive metabolite production using reported Streptomyces tanashiensis strain A2D by Singh et al. [18] where sucrose supported the production of bioactive metabolites. The production started during mid-stationary phase that confirmed the compound to be a secondary metabolite in nature. In the present study glucose does not support the production of antibacterial compounds, which was in contradiction with the previous reports in strains Streptomyces sannanensis strain RJT-1 [19], Streptomyces kanamyceticus M27 [20] where the glucose facilitates the production of secondary metabolites. The depleted growth in the glucose supplemented media was might be due to high concentration of glucose increases the cell growth and leads to inhibition of antimicrobial agent production and also repress the secondary metabolism [21] and [22]. Out of both organic and inorganic nitrogen sources, maximum antibiotic production was found in the medium consists of yeast extract (1.5%) as nitrogen source, our results are in lines with the previous reports of optimum antibiotic production using organic nitrogen sources for better yield [23] and [24]. S.