ISSN 2146-8389
 

Original Research (Original Article) 


Antimicrobial and antioxidant properties of marine actinomycetes Streptomyces sp VITSTK7

Mohankumar Thenmozhi, Krishnan Kannabiran.

Cited by (6)

Abstract
Marine actinomycetes are potential provider of novel bioactive metabolites and currently emerged as an important source for natural products with unique chemical diversity. The aim of the present study was to evaluate antimicrobial and antioxidant potential of the actinomycetes isolate <i>Streptomyces</i> sp VITSTK7 isolated from marine sediments collected at the Bay of Bengal coast of Puducherry, India. The culturing conditions such as pH, temperature, NaCl, carbon source and nitrogen source were optimized for maximal growth by dry weight method. The ethyl acetate (EA) extract showed a significant antifungal activity against <i>Aspergillus fumigatus</i> with the MIC value of 0.25 mg/ml. However, EA extract showed moderate antibacterial activity against selected bacterial pathogens. The antioxidant potential of the extract was assessed by DPPH (1,1-Diphenyl-2-picrylhydrazyl) scavenging activity, Fe+3 reducing assay, metal chelating assay and DNA inhibition protection assay. The DPPH scavenging activity was 43.2% at 10 mg/ml of EA extract and compared with ascorbic acid standard. The Fe+3 reducing assay showed 0.37 absorbance at 700 nm at 10mg/ml of EA extract. The EA extract at 10 mg/ml showed 51% metal chelation. The ability of EA extract to protect DNA (pBR322) against UV-induced photolysed H2O2-oxidative damage was also analyzed. The EA extract was able to protect the DNA significantly from oxidative damage. The results of this study indicate that the ethyl acetate extract of the isolate possess both free-radical scavenging and antimicrobial activity.

Key words: Antimicrobial activity; Antioxidant activity; Aspergillus fumigatus; Streptomyces sp. VITSTK7


 
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How to Cite this Article
Pubmed Style

Thenmozhi M, Kannabiran K. Antimicrobial and antioxidant properties of marine actinomycetes Streptomyces sp VITSTK7. Oxid Antioxid Med Sci. 2012; 1(1): 51-57. doi:10.5455/oams.270412.or.005


Web Style

Thenmozhi M, Kannabiran K. Antimicrobial and antioxidant properties of marine actinomycetes Streptomyces sp VITSTK7. http://www.ejmoams.com/?mno=17560 [Access: September 22, 2018]. doi:10.5455/oams.270412.or.005


AMA (American Medical Association) Style

Thenmozhi M, Kannabiran K. Antimicrobial and antioxidant properties of marine actinomycetes Streptomyces sp VITSTK7. Oxid Antioxid Med Sci. 2012; 1(1): 51-57. doi:10.5455/oams.270412.or.005



Vancouver/ICMJE Style

Thenmozhi M, Kannabiran K. Antimicrobial and antioxidant properties of marine actinomycetes Streptomyces sp VITSTK7. Oxid Antioxid Med Sci. (2012), [cited September 22, 2018]; 1(1): 51-57. doi:10.5455/oams.270412.or.005



Harvard Style

Thenmozhi, M. & Kannabiran, K. (2012) Antimicrobial and antioxidant properties of marine actinomycetes Streptomyces sp VITSTK7. Oxid Antioxid Med Sci, 1 (1), 51-57. doi:10.5455/oams.270412.or.005



Turabian Style

Thenmozhi, Mohankumar, and Krishnan Kannabiran. 2012. Antimicrobial and antioxidant properties of marine actinomycetes Streptomyces sp VITSTK7. Oxidants and Antioxidants in Medical Science, 1 (1), 51-57. doi:10.5455/oams.270412.or.005



Chicago Style

Thenmozhi, Mohankumar, and Krishnan Kannabiran. "Antimicrobial and antioxidant properties of marine actinomycetes Streptomyces sp VITSTK7." Oxidants and Antioxidants in Medical Science 1 (2012), 51-57. doi:10.5455/oams.270412.or.005



MLA (The Modern Language Association) Style

Thenmozhi, Mohankumar, and Krishnan Kannabiran. "Antimicrobial and antioxidant properties of marine actinomycetes Streptomyces sp VITSTK7." Oxidants and Antioxidants in Medical Science 1.1 (2012), 51-57. Print. doi:10.5455/oams.270412.or.005



APA (American Psychological Association) Style

Thenmozhi, M. & Kannabiran, K. (2012) Antimicrobial and antioxidant properties of marine actinomycetes Streptomyces sp VITSTK7. Oxidants and Antioxidants in Medical Science, 1 (1), 51-57. doi:10.5455/oams.270412.or.005





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