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Bacteria Generated Antibacterial Gold Nanoparticles and Potential Mechanistic Insight

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Abstract

In this article, industrially useful bacteria Bacillus megaterium (MTCC 2444) have been explored in the biosynthesis of gold nanoparticles for the first time. Different parameters including pH, temperature, biomass concentration have been studied for optimization of nanoparticle synthesis. Characterizations of nanoparticles have been carried out by UV–Vis spectroscopy, XRD, FTIR and HRTEM. The average size of the nanoparticles is found to be around 16 nm. Mechanistic studies indicate that a flavin-containing reductase is possibly involved in the biosynthesis process. To the best of our knowledge, this is for the first time the participation of flavin-containing reductase domain of cytochrome P450 BM3 of B. megaterium is demonstrated in the biosynthesis of nanoparticles. Extracellular biosynthesis of gold nanoparticles has also been demonstrated by using the cell-free-extract of bacterial biomass. Moreover, biosynthesized gold nanoparticles exhibit wide spectrum of antimicrobial activities against several multidrug resistant pathogenic bacteria.

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Authors and Affiliations

  1. School of Biotechnology, KIIT University, Campus 11, Patia, Bhubaneswar, 751024, Odisha, India

    Satyapriya Jena, Bharat Das, Mrutyunjay Suar & Dindyal Mandal

  2. Central Research Facility, Indian Institute of Technology Kharagpur, Kharagpur, India

    Ranadhir Bosu

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  1. Satyapriya Jena
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  2. Bharat Das
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  3. Ranadhir Bosu
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  4. Mrutyunjay Suar
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  5. Dindyal Mandal
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Correspondence to Dindyal Mandal.

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Jena, S., Das, B., Bosu, R. et al. Bacteria Generated Antibacterial Gold Nanoparticles and Potential Mechanistic Insight. J Clust Sci 26, 1707–1721 (2015). https://doi.org/10.1007/s10876-015-0869-7

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  • DOI: https://doi.org/10.1007/s10876-015-0869-7

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