Multifaceted bioproperties of Streptomyces bacillaris ANS2 isolated from Andaman and Nicobar Islands, India
The rich warehouse called marine actinobacteria has enticed researchers for several decades. The assessment of their metabolites has evidenced several diverse and multiple biological properties vacillating from antibacterial, antituberculosis, antioxidant, anticancer to mosquitocidal. Therefore, the present study has been aimed to reconnoitre the isolation and portrayal of the promising marine actinobacteria named Streptomyces bacillaris ANS2 isolated from the mangrove sediment collected from Andaman and Nicobar islands. The ethyl acetate extract of ANS2 showed broad spectrum activity against various pathogens including Escherichia coli (18.0±0.3 mm), Salmonella paratyphi (16.0±0.6 mm) and Klebsiella pneumonia (14.8±0.7 mm). It showed maximum activity against drug sensitive strain of Mycobacterium tuberculosis (98.2±0.36%) followed by M. tuberculosis MDR strain (97.04±1.32%) and M. tuberculosis H37Rv (91.80±0.45%). The antioxidant activity by DPPH assay of ANS2 showed 29.9±0.38 - 61.35±0.78 % free radical scavenging at 100μg/ml - 500μg/ml as compared to the standard ascorbic acid which showed 96±1.0% at 100μg/ml concentration. The anticancer activity showed 88.12±0.9% and 89.5±0.26% inhibition against HT 29 (colon cancer) and HeLa (cervical cancer) cell line at 1000μg/ml concentration. The maximum larval mortality was recorded on Culex quinquefasciatus(LC50 =1100.134 μg/ml and r2= 0.99) and Aedes aegypti (LC50 =690.620 μg/ml and r2= 0.99).The biochemical, morphological and 16S rRNA gene analysis study clearly confirmed that the promising strain belonged to the genus Streptomyces bacillaris and the phylogenetic tree confirmed it as S. bacillaris. Results showed that S.bacillaris ANS2 showed multidimensional bioproperties.