Biosynthesis of gold nanoparticles by the extreme bacterium Deinococcus radiodurans and an evaluation of their antibacterial properties

Jiulong Li,1,* Qinghao Li,1,* Xiaoqiong Ma,2,* Bing Tian,1 Tao Li,1 Jiangliu Yu,1 Shang Dai,1 Yulan Weng,1 Yuejin Hua1 1Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Institute of Nuclear-Agricultural Sciences, Zhejiang University, 2Centra...

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Autores principales:	Li J, Li Q, Ma X, Tian B, Li T, Yu J, Dai S, Weng Y, Hua Y
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2016
Materias:	Deinococcus radiodurans gold nanoparticles biosynthesis antibacterial. Medicine (General) R5-920
Acceso en línea:	https://doaj.org/article/88fdbe23760e425588c49bb5f40505cc
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spelling	oai:doaj.org-article:88fdbe23760e425588c49bb5f40505cc2021-12-02T06:34:33ZBiosynthesis of gold nanoparticles by the extreme bacterium Deinococcus radiodurans and an evaluation of their antibacterial properties1178-2013https://doaj.org/article/88fdbe23760e425588c49bb5f40505cc2016-11-01T00:00:00Zhttps://www.dovepress.com/biosynthesis-of-gold-nanoparticles-by-the-extreme-bacterium-deinococcu-peer-reviewed-article-IJNhttps://doaj.org/toc/1178-2013Jiulong Li,1,* Qinghao Li,1,* Xiaoqiong Ma,2,* Bing Tian,1 Tao Li,1 Jiangliu Yu,1 Shang Dai,1 Yulan Weng,1 Yuejin Hua1 1Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Institute of Nuclear-Agricultural Sciences, Zhejiang University, 2Central Laboratory, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China *These authors contributed equally to this work Abstract: Deinococcus radiodurans is an extreme bacterium known for its high resistance to stresses including radiation and oxidants. The ability of D. radiodurans to reduce Au(III) and biosynthesize gold nanoparticles (AuNPs) was investigated in aqueous solution by ultraviolet and visible (UV/Vis) absorption spectroscopy, electron microscopy, X-ray diffraction (XRD), dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). D. radiodurans efficiently synthesized AuNPs from 1 mM Au(III) solution in 8 h. The AuNPs were of spherical, triangular and irregular shapes with an average size of 43.75 nm and a polydispersity index of 0.23 as measured by DLS. AuNPs were distributed in the cell envelope, across the cytosol and in the extracellular space. XRD analysis confirmed the crystallite nature of the AuNPs from the cell supernatant. Data from the FTIR and XPS showed that upon binding to proteins or compounds through interactions with carboxyl, amine, phospho and hydroxyl groups, Au(III) may be reduced to Au(I), and further reduced to Au(0) with the capping groups to stabilize the AuNPs. Biosynthesis of AuNPs was optimized with respect to the initial concentration of gold salt, bacterial growth period, solution pH and temperature. The purified AuNPs exhibited significant antibacterial activity against both Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria by damaging their cytoplasmic membrane. Therefore, the extreme bacterium D. radiodurans can be used as a novel bacterial candidate for efficient biosynthesis of AuNPs, which exhibited potential in biomedical application as an antibacterial agent. Keywords: Deinococcus radiodurans, gold nanoparticles, gold ions, reduction, antibacterial  Li JLi QMa XTian BLi TYu JDai SWeng YHua YDove Medical PressarticleDeinococcus radioduransgold nanoparticlesbiosynthesisantibacterial.Medicine (General)R5-920ENInternational Journal of Nanomedicine, Vol Volume 11, Pp 5931-5944 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	Deinococcus radiodurans gold nanoparticles biosynthesis antibacterial. Medicine (General) R5-920
spellingShingle	Deinococcus radiodurans gold nanoparticles biosynthesis antibacterial. Medicine (General) R5-920 Li J Li Q Ma X Tian B Li T Yu J Dai S Weng Y Hua Y Biosynthesis of gold nanoparticles by the extreme bacterium Deinococcus radiodurans and an evaluation of their antibacterial properties
description	Jiulong Li,1,* Qinghao Li,1,* Xiaoqiong Ma,2,* Bing Tian,1 Tao Li,1 Jiangliu Yu,1 Shang Dai,1 Yulan Weng,1 Yuejin Hua1 1Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Institute of Nuclear-Agricultural Sciences, Zhejiang University, 2Central Laboratory, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China *These authors contributed equally to this work Abstract: Deinococcus radiodurans is an extreme bacterium known for its high resistance to stresses including radiation and oxidants. The ability of D. radiodurans to reduce Au(III) and biosynthesize gold nanoparticles (AuNPs) was investigated in aqueous solution by ultraviolet and visible (UV/Vis) absorption spectroscopy, electron microscopy, X-ray diffraction (XRD), dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). D. radiodurans efficiently synthesized AuNPs from 1 mM Au(III) solution in 8 h. The AuNPs were of spherical, triangular and irregular shapes with an average size of 43.75 nm and a polydispersity index of 0.23 as measured by DLS. AuNPs were distributed in the cell envelope, across the cytosol and in the extracellular space. XRD analysis confirmed the crystallite nature of the AuNPs from the cell supernatant. Data from the FTIR and XPS showed that upon binding to proteins or compounds through interactions with carboxyl, amine, phospho and hydroxyl groups, Au(III) may be reduced to Au(I), and further reduced to Au(0) with the capping groups to stabilize the AuNPs. Biosynthesis of AuNPs was optimized with respect to the initial concentration of gold salt, bacterial growth period, solution pH and temperature. The purified AuNPs exhibited significant antibacterial activity against both Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria by damaging their cytoplasmic membrane. Therefore, the extreme bacterium D. radiodurans can be used as a novel bacterial candidate for efficient biosynthesis of AuNPs, which exhibited potential in biomedical application as an antibacterial agent. Keywords: Deinococcus radiodurans, gold nanoparticles, gold ions, reduction, antibacterial
format	article
author	Li J Li Q Ma X Tian B Li T Yu J Dai S Weng Y Hua Y
author_facet	Li J Li Q Ma X Tian B Li T Yu J Dai S Weng Y Hua Y
author_sort	Li J
title	Biosynthesis of gold nanoparticles by the extreme bacterium Deinococcus radiodurans and an evaluation of their antibacterial properties
title_short	Biosynthesis of gold nanoparticles by the extreme bacterium Deinococcus radiodurans and an evaluation of their antibacterial properties
title_full	Biosynthesis of gold nanoparticles by the extreme bacterium Deinococcus radiodurans and an evaluation of their antibacterial properties
title_fullStr	Biosynthesis of gold nanoparticles by the extreme bacterium Deinococcus radiodurans and an evaluation of their antibacterial properties
title_full_unstemmed	Biosynthesis of gold nanoparticles by the extreme bacterium Deinococcus radiodurans and an evaluation of their antibacterial properties
title_sort	biosynthesis of gold nanoparticles by the extreme bacterium deinococcus radiodurans and an evaluation of their antibacterial properties
publisher	Dove Medical Press
publishDate	2016
url	https://doaj.org/article/88fdbe23760e425588c49bb5f40505cc
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Biosynthesis of gold nanoparticles by the extreme bacterium Deinococcus radiodurans and an evaluation of their antibacterial properties

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