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Antagonistic  Streptomyces  spp. AJ8 was isolated and identified from the Kovalam solar salt works in India. The antimicrobial NRPS cluster gene was characterized by PCR, sequencing and predict the secondary structure analysis. The secondary metabolites will be extracted from different organic solvent extraction and studied the antibacterial, antifungal, antiviral and anticancer activities. In vitro antagonistic activity results revealed that,  Streptomyces  spp. AJ8 was highly antagonistic against  Staphylococcus aureus, Aeromonas hydrophila  WPD1 and  Candida albicans.  The genomic level identification revealed that, the strain was confirmed as  Streptomyces  spp. AJ8 and submitted the NCBI database (KC603899). The NRPS gene was generated a single gene fragment of 781 bp length (KR491940) and the database analysis revealed that, the closely related to  Streptomyces  spp. SAUK6068 and  S. coeruleoprunus  NBRC15400. The secondary metabolites extracted with ethyl acetate was effectively inhibited the bacterial and fungal growth at the ranged between 7 and 19.2 mm of zone of inhibition. The antiviral activity results revealed that, the metabolite was significantly (P < 0.001) controlled the killer shrimp virus white spot syndrome virus at the level of 85 %. The metabolite also suppressed the L929 fibroblast cancer cells at 35.7 % viability in 1000 µg treatment.

Haloalkaliphilic Streptomyces spp. AJ8 isolated from solar salt works and its’ pharmacological potential