Production and Purification of a Bioactive Substance Inhibiting Multiple Drug Resistant Bacteria and Human Leukemia Cells from a Salt-Tolerant Marine Actinobacterium sp. Isolated from the Bay of Bengal |
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Authors: | Malay Saha Parasuraman Jaisankar Satadal Das Kalyan K Sarkar Soma Roy Shila E Besra Joseph R Vedasiromani Debashish Ghosh Barindra Sana Joydeep Mukherjee |
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Institution: | (1) Environmental Science Programme and Department of Life Science & Biotechnology, Jadavpur University, Kolkata, 700 032, India;(2) Indian Institute of Chemical Biology, 4, Raja S.C. Mullick Road, Kolkata, 700 032, India;(3) Microbiology and Immunology Department, Peerless Hospital and B.K. Roy Research Centre, Kolkata, 700 094, India |
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Abstract: | Four marine actinobacteria tolerant to 200 g NaCl l−1 were screened for antibacterial activity against eight patient-derived multiple drug resistant (MDR) bacteria. The active compound (MW 300.2, predicted molecular formula C20H28O2) from an actinobacterium, was inhibitory to three Gram-positive and three Gram-negative MDR bacteria, seven non-clinical Gram-positive, four Gram-negative bacteria and five fungi (MIC: 3.5–4.0 µg ml−1). Also, 54% of human leukemia (HL-60) cells were killed by the compound at 0.05 µg ml−1. Bioreactor production demonstrated unusual primary metabolite kinetics. Molecular phylogenetic analysis showed this typical intertidal inhabitant to be a member of the Streptomyces genus and distinct from other salt-tolerant actinobacteria. As no compound was found to match the properties in several electronic databases, our screening strategy should increase the possibility of discovering bioactive molecules from rare actinobacteria. |
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Keywords: | Actinobacteria Anti-leukemic Antimicrobial Bioreactor Marine Phylogeny |
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