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

Tiwari, Mradul; Jain, Prateek; Hariharapura, Raghu Chandrashekar; Narayanan, K.; Bhat, K. Udaya; Udupa, N.; Rao, J. Venkata

doi:10.1016/j.procbio.2016.08.008

Cited by 83 publications

(25 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is known that the periplasmic silver-binding protein (SilE) is homologous to the copper-binding proteins PcoE and CusF found in E. coli, supporting the potential for copper binding by SilE (Ramanathan et al 2013). A copper-resistant Bacillus cereus strain that was isolated and used to produce extracellular CuNPs possessed resistance to copper concentrations greater than 10 mM and contained several copper resistance genes such as copA, copC, copD, and cutC as identified using UniProtKB (Tiwari et al 2016). It has been shown that bacterial isolates with resistance to copper in the 3.1-4.7 mM range all exhibited increased expression of copA.…”

Section: Coppermentioning

confidence: 96%

Biological links between nanoparticle biosynthesis and stress responses in bacteria

2018

View full text Add to dashboard Cite

There is rising interest in nanoparticle biosynthesis using bacteria due to the potential for applications in bioremediation, catalysis, or as antimicrobials. However, biosynthesis remains limited by the inability to control nanoparticle morphology and size due to the lack of knowledge regarding explicit molecular mechanisms. Due to their importance in nanoparticle biosynthesis and as antimicrobials, we focus our discussion on silver, gold, and copper nanoparticles. We discuss recent efforts to elucidate reduction mechanisms that have identified generic enzymes and metal resistance genes as strong candidates to facilitate nanoparticle biosynthesis. Although it is known that these enzymes and genes play significant roles in maintaining bacterial homeostasis, there are few reports discussing this topic. Thus, we discuss examples of how metal resistance genes are conserved across bacteria and have been shown to be important for both nanoparticle biosynthesis and processes such as virulence or oxidative stress responses. Overall, this review highlights biological connections between nanoparticle biosynthesis and stress responses by examining the role of reductases and metal resistance genes in both processes. This understanding provides a greater role for nanoparticle biosynthesis in bacteria and could enable a systems biology level of control over nanoparticle biosynthesis.

show abstract

Section: Coppermentioning

confidence: 96%

Biological links between nanoparticle biosynthesis and stress responses in bacteria

2018

View full text Add to dashboard Cite

show abstract

“…Nanostructured forms of heavy metals, such as silver [167], gold [168], copper [169] and others [170], are able to exhibit strong antibacterial properties by the mechanism generally known as oligodynamic effect. This effect runs in low concentrations, in which the metals react with thiol or amine groups of bacterial proteins and form a covalent bond.…”

Section: Antibacterial Propertiesmentioning

confidence: 99%

Nanostructured Materials for Artificial Tissue Replacements

Pryjmaková

Kaimlová

Hubáček

et al. 2020

IJMS

View full text Add to dashboard Cite

This paper review current trends in applications of nanomaterials in tissue engineering. Nanomaterials applicable in this area can be divided into two groups: organic and inorganic. Organic nanomaterials are especially used for the preparation of highly porous scaffolds for cell cultivation and are represented by polymeric nanofibers. Inorganic nanomaterials are implemented as they stand or dispersed in matrices promoting their functional properties while preserving high level of biocompatibility. They are used in various forms (e.g., nano- particles, -tubes and -fibers)—and when forming the composites with organic matrices—are able to enhance many resulting properties (biologic, mechanical, electrical and/or antibacterial). For this reason, this contribution points especially to such type of composite nanomaterials. Basic information on classification, properties and application potential of single nanostructures, as well as complex scaffolds suitable for 3D tissues reconstruction is provided. Examples of practical usage of these structures are demonstrated on cartilage, bone, neural, cardiac and skin tissue regeneration and replacements. Nanomaterials open up new ways of treatments in almost all areas of current tissue regeneration, especially in tissue support or cell proliferation and growth. They significantly promote tissue rebuilding by direct replacement of damaged tissues.

show abstract

“…The noble metal NPs for example silver, gold, platinum and their alloys have been frequently biosynthesized by various workers [6][7][8][9][10][11][12]. Among the coinage metal NPs, copper nanoparticles (Cu-NPs) are of great interest due to their low cost, easy availability and high electrical conductivity [13][14][15]. Borkow and Gabbay [16] and Zheng et al [17] have reported that the copper ions are used as pesticides, fungicides and fertilizers.…”

Section: Introductionmentioning

confidence: 99%

Current status of plant metabolite-based fabrication of copper/copper oxide nanoparticles and their applications: a review

2020

View full text Add to dashboard Cite

Since green mode of nanoparticles (NPs) synthesis is simple, advantageous and environment friendly relative to chemical and physical procedures, various plant species have been used to fabricate copper and copper oxide nanoparticles (Cu/CuO-NPs) owing to the presence of phytochemicals which often act as capping as well as stabilizing agent. These Cu/CuO-NPs are highly stable and used in the degradation of organic dyes like methylene blue and reduction of organic compounds such as phenols. They are also used as antibacterial, antioxidant and antifungal agent due to their cytotoxicity. They are also examined for agricultural crops growth and productivity. Cu-NPs increased the root and shoot growth of mung bean. In wheat plants, these particles reduced shoot growth; and enhanced the grain yield and stress tolerance through starch degradation. Similarly, CuO-NPs treated seedlings have shown reduced chlorophyll, carotenoid and sugar content, whereas proline and anthocyanins were increased in Brassica rapa seedlings. Overall, this review presents the recent understanding of plant-mediated Cu and CuO-NPs fabrication and their application in biomedicine, environmental remediation and agricultural practices. A comparison of the traditional/conventional method of fabrication of NPs with those of green protocols has also been made. Some misconception of copper chemistry has also been critically discussed in terms of oxidation and reduction reactions.

show abstract

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

Cited by 83 publications

References 47 publications

Biological links between nanoparticle biosynthesis and stress responses in bacteria

Biological links between nanoparticle biosynthesis and stress responses in bacteria

Nanostructured Materials for Artificial Tissue Replacements

Current status of plant metabolite-based fabrication of copper/copper oxide nanoparticles and their applications: a review

Contact Info

Product

Resources

About