Biosynthesis of copper nanoparticles using copper-resistant Bacillus cereus, a soil isolate

Mradul Tiwari, Prateek Jain, Raghu Chandrashekhar Hariharapura, Kashinathan Narayanan, Udaya Bhat K., Nayanabhirama Udupa, Josyula Venkata Rao

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Microorganisms are useful systems for the production of biocompatible metal nanoparticles. Copper, an essential element of life, has good therapeutic potential. However, copper lacks suitable form for effective in vivo delivery, which has diminished its applicability. In this study, we produced biosynthesized copper nanoparticles (BCuNps) using a copper-resistant bacterial isolate from copper mine. The organism was able to tolerate >10 mM of copper and when analysed by 16S rRNA technique, showed 100% similarity with Bacillus cereus. BCuNps, produced by this microorganism, in cell-free filtrate, were characterized for surface plasmon resonance (SPR), particle's characteristics, spectroscopic properties and morphology. SPR peaks for BCuNps were recorded between 570–620 and 350–370 nm. BCuNps characteristics, namely particle size distribution, polydispersity index and zeta potential were found to be 11–33 nm, 0.433 and (−) 19.6 mV, respectively. Scanning electron microscope (SEM), transmission electron microscope (TEM) and atomic force microscope (AFM) analyses confirmed the uniform morphology; X-ray diffraction (XRD) spectrum revealed the crystalline nature; and Fourier transform infrared (FTIR) spectrum disclosed the presence of protein with BCuNps. A comparative evaluation of BCuNps with copper sulphate to determine their antimicrobial and cell toxicity levels was undertaken. BCuNps showed better antimicrobial effect and found to be safer against normal cell lines, such as HaCat, Vero and hFOB, than the copper sulphate control.

Original languageEnglish
Pages (from-to)1348-1356
Number of pages9
JournalProcess Biochemistry
Volume51
Issue number10
DOIs
Publication statusPublished - 01-10-2016

Fingerprint

Bacillus cereus
Biosynthesis
Nanoparticles
Copper
Soil
Soils
Copper Sulfate
Surface plasmon resonance
Surface Plasmon Resonance
Microorganisms
Electron microscopes
Copper mines
Electrons
Metal Nanoparticles
Metal nanoparticles
Polydispersity
Zeta potential
Particle size analysis
Fourier Analysis
Toxicity

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biochemistry
  • Applied Microbiology and Biotechnology

Cite this

Tiwari, Mradul ; Jain, Prateek ; Chandrashekhar Hariharapura, Raghu ; Narayanan, Kashinathan ; Bhat K., Udaya ; Udupa, Nayanabhirama ; Rao, Josyula Venkata. / Biosynthesis of copper nanoparticles using copper-resistant Bacillus cereus, a soil isolate. In: Process Biochemistry. 2016 ; Vol. 51, No. 10. pp. 1348-1356.
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Biosynthesis of copper nanoparticles using copper-resistant Bacillus cereus, a soil isolate. / Tiwari, Mradul; Jain, Prateek; Chandrashekhar Hariharapura, Raghu; Narayanan, Kashinathan; Bhat K., Udaya; Udupa, Nayanabhirama; Rao, Josyula Venkata.

In: Process Biochemistry, Vol. 51, No. 10, 01.10.2016, p. 1348-1356.

Research output: Contribution to journalArticle

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AU - Tiwari, Mradul

AU - Jain, Prateek

AU - Chandrashekhar Hariharapura, Raghu

AU - Narayanan, Kashinathan

AU - Bhat K., Udaya

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AU - Rao, Josyula Venkata

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