Characteristics of selenium nanoparticles synthesized by cell-free supernatant Cupriavidus sp. SHE.

Ying Yang; Shuzhen LI; Shuling Fan; Jing Yang; Zheng LI; Henglin Zhang; Yuanyuan QU

Return

Characteristics of selenium nanoparticles synthesized by cell-free supernatant Cupriavidus sp. SHE.

Author: Ying YANG ¹ ; Shuzhen LI ¹ ; Shuling FAN ¹ ; Jing YANG ¹ ; Zheng LI ¹ ; Henglin ZHANG ¹ ; Yuanyuan QU ¹
Author Information

1. Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China.
Publication Type:Journal Article
Keywords: Cupriavidus sp. SHE; antibacterial properties; green synthesis; selenium nanoparticles
MeSH: Anti-Bacterial Agents; pharmacology; Bacteria; drug effects; Cupriavidus; metabolism; Nanoparticles; Selenious Acid; analysis; Selenium; chemistry; pharmacology
From: Chinese Journal of Biotechnology 2020;36(6):1162-1169
CountryChina
Language:Chinese
Abstract: In recent years, selenium nanoparticles (SeNPs) have been widely used in many fields such as nanotechnology, biomedicine and environmental remediation due to their good electrical conductivity, photothermal properties and anticancer properties. In this study, the cell-free supernatant, whole cell and the cell-free extracts of the strain Cupriavidus sp. SHE were used to synthesize SeNPs, and several methods were applied to analyze the crystal structure and surface functional groups of the nanoparticles. Finally, Pseudomonas sp. PI1 (G⁺) and Escherichia coli BL21 (G⁻) were selected to investigate the antibacterial properties of SeNPs. Cell-free supernatant, whole cell and cell-free extracts of the strain could synthesize SeNPs. As for the cell-free supernatant, selenite concentration of 5 mmol/L and pH=7 were favorable for the synthesis of SeNPs. TEM images show that the average size of nanospheres synthesized by the supernatant was 196 nm. XRD analysis indicates the hexagonal crystals structure of SeNPs. FTIR and SDS-PAGE confirmed the proteins bound to the surfaces of SeNPs. SeNPs synthesized by cell-free supernatant showed no antimicrobial activities against Pseudomonas sp. PI1 and Escherichia coli BL21 (DE3). These results suggest that proteins played an important role in biotransformation of SeNPs in an eco-friendly process, and SeNPs synthesized in this study were non-toxic and biologically compatible, which might be applied in other fields in the future.