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Singh P, Pandit S, Mokkapati VRSS, Garnæs J, Mijakovic I. A Sustainable Approach for the Green Synthesis of Silver Nanoparticles from Solibacillus isronensis sp. and Their Application in Biofilm Inhibition. Molecules 2020; 25:E2783. [PMID: 32560208 PMCID: PMC7355478 DOI: 10.3390/molecules25122783] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 05/31/2020] [Accepted: 06/09/2020] [Indexed: 11/29/2022] Open
Abstract
The use of bacteria as nanofactories for the green synthesis of nanoparticles is considered a sustainable approach, owing to the stability, biocompatibility, high yields and facile synthesis of nanoparticles. The green synthesis provides the coating or capping of biomolecules on nanoparticles surface, which confer their biological activity. In this study, we report green synthesis of silver nanoparticles (AgNPs) by an environmental isolate; named as AgNPs1, which showed 100% 16S rRNA sequence similarity with Solibacillus isronensis. UV/visible analysis (UV/Vis), transmission electron microscopy (TEM), atomic force microscopy (AFM), dynamic light scattering (DLS), and Fourier-transform infrared spectroscopy (FTIR) were used to characterize the synthesized nanoparticles. The stable nature of nanoparticles was studied by thermogravimetric analysis (TGA) and inductively coupled plasma mass spectrometry (ICP-MS). Further, these nanoparticles were tested for biofilm inhibition against Escherichia coli and Pseudomonas aeruginosa. The AgNPs showed minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values of 3.12 µg/mL and 6.25 µg/mL for E. coli, and 1.56 µg/mL and 3.12 µg/mL for P. aeruginosa, respectively.
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Affiliation(s)
- Priyanka Singh
- The Novo Nordisk Foundation, Center for Biosustainability, Technical University of Denmark, 2800 Lyngby, Denmark;
| | - Santosh Pandit
- Systems and Synthetic Biology Division, Department of Biology and Biological Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden; (S.P.); (V.M.)
| | - VRSS Mokkapati
- Systems and Synthetic Biology Division, Department of Biology and Biological Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden; (S.P.); (V.M.)
| | - Jørgen Garnæs
- Danish Institute of Fundamental Metrology, Kogle Allé 5, DK 2970 Hoersholm, Denmark;
| | - Ivan Mijakovic
- The Novo Nordisk Foundation, Center for Biosustainability, Technical University of Denmark, 2800 Lyngby, Denmark;
- Systems and Synthetic Biology Division, Department of Biology and Biological Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden; (S.P.); (V.M.)
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Arroyo-Herrera I, Rojas-Rojas FU, Lozano-Cervantes KD, Larios-Serrato V, Vásquez-Murrieta MS, Whtiman WB, Ibarra JA, Estrada-de Los Santos P. Draft genome of five Cupriavidus plantarum strains: agave, maize and sorghum plant-associated bacteria with resistance to metals. 3 Biotech 2020; 10:242. [PMID: 32405446 DOI: 10.1007/s13205-020-02210-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 04/15/2020] [Indexed: 11/27/2022] Open
Abstract
Five strains of Cupriavidus plantarum, a metal-resistant, plant-associated bacterium, were selected for genome sequencing through the Genomic Encyclopedia of Bacteria and Archaea (GEBA) Phase IV project at the Joint Genome Institute (JGI) of the U.S. Department of Energy (DOE). The genome of the strains was in the size range of 6.2-6.4 Mbp and encoded 5605-5834 proteins; 16.9-23.7% of these genes could not be assigned to a COG-associated functional category. The G + C content was 65.83-65.99%, and the genomes encoded 59-67 stable RNAs. The strains were resistant in vitro to arsenite, arsenate, cobalt, chromium, copper, nickel and zinc, and their genomes possessed the resistance genes for these metals. The genomes also encoded the biosynthesis of potential antimicrobial compounds, such as terpenes, phosphonates, bacteriocins, betalactones, nonribosomal peptides, phenazine and siderophores, as well as the biosynthesis of cellulose and enzymes such as chitinase and trehalase. The average nucleotide identity (ANI) and DNA-DNA in silico hybridization of the genomes confirmed that C. plantarum is a single species. Moreover, the strains cluster within a single group upon multilocus sequence analyses with eight genes and a phylogenomic analyses. Noteworthy, the ability of the species to tolerate high concentrations of different metals might prove useful for bioremediation of naturally contaminated environments.
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Affiliation(s)
- Ivan Arroyo-Herrera
- 1Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prol. Carpio y Plan de Ayala S/N. Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340 Cd. de México, Mexico
| | - Fernando Uriel Rojas-Rojas
- 1Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prol. Carpio y Plan de Ayala S/N. Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340 Cd. de México, Mexico
- 2Laboratorio de Ciencias AgroGenómicas, Escuela Nacional de Estudios Superiores, Universidad Nacional Autónoma de México, León, Guanajuato, Mexico
| | - Karla Daniela Lozano-Cervantes
- 1Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prol. Carpio y Plan de Ayala S/N. Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340 Cd. de México, Mexico
| | - Violeta Larios-Serrato
- 1Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prol. Carpio y Plan de Ayala S/N. Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340 Cd. de México, Mexico
| | - María Soledad Vásquez-Murrieta
- 1Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prol. Carpio y Plan de Ayala S/N. Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340 Cd. de México, Mexico
| | | | - J Antonio Ibarra
- 1Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prol. Carpio y Plan de Ayala S/N. Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340 Cd. de México, Mexico
| | - Paulina Estrada-de Los Santos
- 1Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prol. Carpio y Plan de Ayala S/N. Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340 Cd. de México, Mexico
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Mucilaginibacter xinganensis sp. nov., a phenanthrene-degrading bacterium isolated from wetland soil. Antonie van Leeuwenhoek 2018; 112:641-649. [DOI: 10.1007/s10482-018-1194-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 10/20/2018] [Indexed: 10/28/2022]
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Chen WM, Xie PB, Hsu MY, Sheu SY. Parvibium lacunae gen. nov., sp. nov., a new member of the family Alcaligenaceae isolated from a freshwater pond. Int J Syst Evol Microbiol 2018; 68:1291-1299. [PMID: 29498621 DOI: 10.1099/ijsem.0.002667] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A bacterial strain designated KMB9T was isolated from a freshwater pond in Taiwan and characterized using a polyphasic taxonomy approach. Cells of strain KMB9T were Gram-stain-negative, aerobic, poly-β-hydroxybutyrate-accumulating, motile by means of a monopolar flagellum, non-spore-forming and rods surrounded by a thick capsule and forming white-coloured colonies. Growth occurred at 20-40 °C (optimum, 25-37 °C), at pH 6.5-7.5 (optimum, pH 7.0) and with 0-0.5 % NaCl (optimum, 0 %). Phylogenetic analyses based on 16S rRNA gene and four housekeeping gene sequences (recA, rpoA, rpoB and atpD) showed that strain KMB9T forms a distinct phyletic line within the family Alcaligenaceae, and the levels of 16S rRNA gene sequence similarity to its closest relatives with validly published names were less than 93.3 %. The predominant fatty acids were summed feature 3 (comprising C16 : 1ω7c and/or C16 : 1ω6c), C16 : 0 and C18 : 1ω7c. The major isoprenoid quinone was Q-8. The major polyamine was putrescine. The polar lipid profile revealed the presence of phosphatidylethanolamine, phosphatidylglycerol and several uncharacterized aminophospholipids, aminolipids, phospholipids and lipids. The genomic DNA G+C content of strain KMB9T was 54.5 mol%. On the basis of the genotypic and phenotypic data, strain KMB9T represents a novel species of a new genus in the family Alcaligenaceae, for which the name Parvibium lacunae gen. nov., sp. nov. is proposed. The type strain is KMB9T (=BCRC 81053T=LMG 30055T=KCTC 52814T).
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Affiliation(s)
- Wen-Ming Chen
- Department of Seafood Science, Laboratory of Microbiology, National Kaohsiung Marine University, No. 142, Hai-Chuan Rd. Nan-Tzu, Kaohsiung City 811, Taiwan, ROC
| | - Pei-Bei Xie
- Department of Marine Biotechnology, National Kaohsiung Marine University, No. 142, Hai-Chuan Rd. Nan-Tzu, Kaohsiung City 811, Taiwan, ROC
| | - Ming-Yuan Hsu
- Department of Marine Biotechnology, National Kaohsiung Marine University, No. 142, Hai-Chuan Rd. Nan-Tzu, Kaohsiung City 811, Taiwan, ROC
| | - Shih-Yi Sheu
- Department of Marine Biotechnology, National Kaohsiung Marine University, No. 142, Hai-Chuan Rd. Nan-Tzu, Kaohsiung City 811, Taiwan, ROC
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Ramachandran H, Shafie NAH, Sudesh K, Azizan MN, Majid MIA, Amirul AAA. Cupriavidus malaysiensis sp. nov., a novel poly(3-hydroxybutyrate-co-4-hydroxybutyrate) accumulating bacterium isolated from the Malaysian environment. Antonie van Leeuwenhoek 2017; 111:361-372. [DOI: 10.1007/s10482-017-0958-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 10/04/2017] [Indexed: 10/18/2022]
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Singh P, Kim YJ, Singh H, Farh MEA, Yang DC. Achromobacter panacis sp. nov., isolated from rhizosphere of Panax ginseng. J Microbiol 2017; 55:428-434. [PMID: 28551873 DOI: 10.1007/s12275-017-6612-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 01/26/2017] [Accepted: 01/27/2017] [Indexed: 11/28/2022]
Abstract
A novel strain DCY105T was isolated from soil collected from the rhizosphere of ginseng (Panax ginseng), in Gochang, Republic of Korea. Strain DCY105T is Gram-reaction-negative, white, non-motile, non-flagellate, rod-shaped and aerobic. The bacteria grow optimally at 30°C, pH 6.5-7.0 and in the absence of NaCl. Phylogenetically, strain DCY105T is most closely related to Achromobacter marplatensis LMG 26219T (96.81%). The DNA G+C content of strain DCY105T was 64.4 mol%. Ubiquinone 8 was the major respiratory quinone, and phosphatidylethanolamine, phosphatidylglycerol, and diphosphatidylglycerol were amongst the major polar lipids. C16:00, C8:03OH and iso-C17:03OH were identified as the major fatty acids present in DCY105T. The results of physiological and biochemical tests allowed strain DCY105T to be differentiated phenotypically from other recognized species belonging to the genus Achromobacter. Therefore, it is suggested that the newly isolated organism represents a novel species, for which the name Achromobacter panacis sp. nov. is proposed with the type strain designated as DCY105T (=CCTCCAB 2015193T =KCTC 42751T).
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Affiliation(s)
- Priyanka Singh
- Department of Oriental Medicine Biotechnology, Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea. .,Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea.
| | - Yeon Ju Kim
- Department of Oriental Medicine Biotechnology, Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea.
| | - Hina Singh
- Department of Oriental Medicine Biotechnology, Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Mohamed El-Agamy Farh
- Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Deok-Chun Yang
- Department of Oriental Medicine Biotechnology, Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea. .,Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Yongin, 17104, Republic of Korea.
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Balakrishna Pillai A, Jaya Kumar A, Thulasi K, Kumarapillai H. Evaluation of short-chain-length polyhydroxyalkanoate accumulation in Bacillus aryabhattai. Braz J Microbiol 2017; 48:451-460. [PMID: 28359856 PMCID: PMC5498450 DOI: 10.1016/j.bjm.2017.01.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 10/27/2016] [Accepted: 01/10/2017] [Indexed: 01/09/2023] Open
Abstract
This study was focused on the polyhydroxybutyrate (PHB) accumulation property of Bacillus aryabhattai isolated from environment. Twenty-four polyhydroxyalkanoate (PHA) producers were screened out from sixty-two environmental bacterial isolates based on Sudan Black B colony staining. Based on their PHA accumulation property, six promising isolates were further screened out. The most productive isolate PHB10 was identified as B. aryabhattai PHB10. The polymer production maxima were 3.264 g/L, 2.181 g/L, 1.47 g/L, 1.742 g/L and 1.786 g/L in glucose, fructose, maltose, starch and glycerol respectively. The bacterial culture reached its stationary and declining phases at 18 h and 21 h respectively and indicated growth-associated PHB production. Nuclear Magnetic Resonance (NMR) spectra confirmed the material as PHB. The material has thermal stability between 30 and 140 °C, melting point at 170 °C and maximum thermal degradation at 287 °C. The molecular weight and poly dispersion index of the polymer were found as 199.7 kDa and 2.67 respectively. The bacterium B. aryabhattai accumulating PHB up to 75% of cell dry mass utilizing various carbon sources is a potential candidate for large scale production of bacterial polyhydroxybutyrate.
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Affiliation(s)
- Aneesh Balakrishna Pillai
- Rajiv Gandhi Centre for Biotechnology (RGCB), Environmental Biology Laboratory, Thiruvananthapuram, Kerala, India
| | - Arjun Jaya Kumar
- Rajiv Gandhi Centre for Biotechnology (RGCB), Environmental Biology Laboratory, Thiruvananthapuram, Kerala, India
| | - Kavitha Thulasi
- Rajiv Gandhi Centre for Biotechnology (RGCB), Environmental Biology Laboratory, Thiruvananthapuram, Kerala, India
| | - Harikrishnan Kumarapillai
- Rajiv Gandhi Centre for Biotechnology (RGCB), Environmental Biology Laboratory, Thiruvananthapuram, Kerala, India.
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Formosimonas limnophila gen. nov., sp. nov., a new member of the family Burkholderiaceae isolated from a freshwater lake. Int J Syst Evol Microbiol 2017; 67:17-24. [DOI: 10.1099/ijsem.0.001561] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Singh P, Singh H, Kim YJ, Yang DC. Pedobacter panacis sp. nov., isolated from Panax ginseng soil. Antonie van Leeuwenhoek 2016; 110:235-244. [PMID: 27798744 DOI: 10.1007/s10482-016-0794-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 10/19/2016] [Indexed: 11/30/2022]
Abstract
A novel strain, DCY108T was isolated from soil of a Panax ginseng field, Yeoncheon province (38°04'N 126°57'E), Republic of Korea. Strain DCY108T is Gram-negative, non-motile, non-flagellate, rod-shaped, and aerobic. The bacterium grows optimally at 25-30 °C, pH 6.5-7.0 and 1 % NaCl. Phylogenetically, strain DCY108T is closely related to Pedobacter jejuensis JCM 18824T, Pedobacter aquatilis JCM 13454T, Pedobacter kyungheensis LMG 26577T and the type strain of the genus Pedobacter heparinus DSM 2366T. The DNA-DNA relatedness values between strain DCY108T and its close phylogenetic neighbors were below 30.0 %. The DNA G+C content of strain DCY108T was determined to be 45.1 mol%. The predominant quinone was menaquinone 7 (MK-7). The major polar lipids were identified as phosphatidylethanolamine and three unidentified aminolipids AL1, AL13 and AL17. Iso-C15:00, iso-C17:03OH and summed feature 3 (C16:1 ω7c/C16:1 ω6c) were identified as the major fatty acids present in strain DCY108T. The results of physiological and biochemical tests allowed strain DCY108T to be differentiated phenotypically from other recognized species belonging to the genus Pedobacter. Therefore, it is suggested that the newly isolated organism represents a novel species, for which the name Pedobacter panacis sp. nov is proposed with the type strain designated as DCY108T (=CCTCCAB 2015196T = KCTC 42748T).
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Affiliation(s)
- Priyanka Singh
- Department of Oriental Medicine Biotechnology, Ginseng Bank, College of Life Science, Kyung Hee University, Seocheon-dong, Giheung-gu, Yongin-Si, Gyeonggi-do, 446-701, Republic of Korea. .,Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Yongin-Si, Gyeonggi-do, 446-701, Republic of Korea.
| | - Hina Singh
- Department of Oriental Medicine Biotechnology, Ginseng Bank, College of Life Science, Kyung Hee University, Seocheon-dong, Giheung-gu, Yongin-Si, Gyeonggi-do, 446-701, Republic of Korea
| | - Yeon-Ju Kim
- Department of Oriental Medicine Biotechnology, Ginseng Bank, College of Life Science, Kyung Hee University, Seocheon-dong, Giheung-gu, Yongin-Si, Gyeonggi-do, 446-701, Republic of Korea
| | - Deok-Chun Yang
- Department of Oriental Medicine Biotechnology, Ginseng Bank, College of Life Science, Kyung Hee University, Seocheon-dong, Giheung-gu, Yongin-Si, Gyeonggi-do, 446-701, Republic of Korea. .,Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Yongin-Si, Gyeonggi-do, 446-701, Republic of Korea.
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Kim DH, Singh P, Farh MEA, Kim YJ, Nguyen NL, Lee HA, Yang DC. Flavobacterium panacis sp. nov., isolated from rhizosphere of Panax ginseng. Antonie van Leeuwenhoek 2016; 109:1199-208. [DOI: 10.1007/s10482-016-0720-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 05/25/2016] [Indexed: 11/29/2022]
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Sun LN, Wang DS, Yang ED, Fang LC, Chen YF, Tang XY, Hua RM. Cupriavidus nantongensis sp. nov., a novel chlorpyrifos-degrading bacterium isolated from sludge. Int J Syst Evol Microbiol 2016; 66:2335-2341. [PMID: 27001671 DOI: 10.1099/ijsem.0.001034] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-negative, aerobic, coccoid to small rod-shaped bacterium, designated X1T, was isolated from sludge collected from the vicinity of a pesticide manufacturer in Nantong, Jiangsu Province, China. Based on 16S rRNA gene sequence analysis, strain X1T belonged to the genus Cupriavidus, and was most closely related to Cupriavidus taiwanensis LMG 19424T (99.1 % 16S rRNA gene sequence similarity) and Cupriavidus alkaliphilus LMG 26294T (98.9 %). Strain X1T showed 16S rRNA gene sequence similarities of 97.2-98.2 % with other species of the genus Cupriavidus. The major cellular fatty acids of strain X1T were C16 : 0, C16 : 1ω7c and/or iso-C15 : 0 2-OH (summed feature 3), C18 : 1ω7c and C17 : 0 cyclo, and the major respiratory quinone was ubiquinone Q-8. The major polar lipids of strain X1T were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, aminophospholipid, phospholipid and hydroxyphosphatidylethanolamine. The DNA G+C content was 66.6 mol%. The DNA-DNA relatedness values of strain X1T with the five reference strains C. taiwanensis LMG 19424T, C. alkaliphilus LMG 26294T, Cupriavidus necator LMG 8453T, Cupriavidus gilardii LMG 5886T and 'Cupriavidus yeoncheonense' KCTC 42053 were lower than 70 %. The results obtained from phylogenetic analysis, phenotypic characterization and DNA-DNA hybridization indicated that strain X1T should be proposed to represent a novel species of the genus Cupriavidus, for which the name Cupriavidus nantongensis sp. nov. is proposed. The type strain is X1T (=KCTC 42909T=LMG 29218T).
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Affiliation(s)
- Le-Ni Sun
- School of Life Science, Anhui Agricultural University, Hefei 230036, PR China
| | - Dao-Sheng Wang
- School of Life Science, Anhui Agricultural University, Hefei 230036, PR China
| | - En-Dong Yang
- School of Life Science, Anhui Agricultural University, Hefei 230036, PR China
| | - Lian-Cheng Fang
- Key Laboratory for Agri-Food Safety, School of Resource & Environment, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Yi-Fei Chen
- Key Laboratory for Agri-Food Safety, School of Resource & Environment, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Xin-Yun Tang
- School of Life Science, Anhui Agricultural University, Hefei 230036, PR China
| | - Ri-Mao Hua
- Key Laboratory for Agri-Food Safety, School of Resource & Environment, Anhui Agricultural University, Hefei, Anhui 230036, PR China
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Singh P, Singh H, Kim YJ, Mathiyalagan R, Wang C, Yang DC. Extracellular synthesis of silver and gold nanoparticles by Sporosarcina koreensis DC4 and their biological applications. Enzyme Microb Technol 2016; 86:75-83. [PMID: 26992796 DOI: 10.1016/j.enzmictec.2016.02.005] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 02/09/2016] [Accepted: 02/11/2016] [Indexed: 10/22/2022]
Abstract
The present study highlights the microbial synthesis of silver and gold nanoparticles by Sporosarcina koreensis DC4 strain, in an efficient way. The synthesized nanoparticles were characterized by ultraviolet-visible spectrophotometry, which displayed maximum absorbance at 424nm and 531nm for silver and gold nanoparticles, respectively. The spherical shape of nanoparticles was characterized by field emission transmission electron microscopy. The energy dispersive X-ray spectroscopy and elemental mapping were displayed the purity and maximum elemental distribution of silver and gold elements in the respective nanoproducts. The X-ray diffraction spectroscopy results demonstrate the crystalline nature of synthesized nanoparticles. The particle size analysis demonstrate the nanoparticles distribution with respect to intensity, volume and number of nanoparticles. For biological applications, the silver nanoparticles have been explored in terms of MIC and MBC against pathogenic microorganisms such as Vibrio parahaemolyticus, Escherichia coli, Salmonella enterica, Bacillus anthracis, Bacillus cereus and Staphylococcus aureus. Moreover, the silver nanoparticles in combination with commercial antibiotics, such as vancomycin, rifampicin, oleandomycin, penicillin G, novobiocin, and lincomycin have been explored for the enhancement of antibacterial activity and the obtained results showed that 3μg concentration of silver nanoparticles sufficiently enhance the antimicrobial efficacy of commercial antibiotics against pathogenic microorganism. Furthermore, the silver nanoparticles potential has been reconnoitered for the biofilm inhibition by S. aureus, Pseudomonas aeruginosa and E. coli and the results revealed sufficient activity at 6μg concentration. In addition, gold nanoparticles have been applied for catalytic activity, for the reduction of 4-nitrophenol to 4-aminophenol using sodium borohydride and positive results were attained.
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Affiliation(s)
- Priyanka Singh
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin 446-701, Republic of Korea
| | - Hina Singh
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin 446-701, Republic of Korea
| | - Yeon Ju Kim
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin 446-701, Republic of Korea.
| | - Ramya Mathiyalagan
- Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, Republic of Korea
| | - Chao Wang
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin 446-701, Republic of Korea
| | - Deok Chun Yang
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin 446-701, Republic of Korea; Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, Republic of Korea.
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List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2015; 65:3763-3767. [DOI: 10.1099/ijsem.0.000632] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The purpose of this announcement is to effect the valid publication of the following effectively published new names and new combinations under the procedure described in the Bacteriological Code (1990 Revision). Authors and other individuals wishing to have new names and/or combinations included in future lists should send three copies of the pertinent reprint or photocopies thereof, or an electronic copy of the published paper to the IJSEM Editorial Office for confirmation that all of the other requirements for valid publication have been met. It is also a requirement of IJSEM and the ICSP that authors of new species, new subspecies and new combinations provide evidence that types are deposited in two recognized culture collections in two different countries. It should be noted that the date of valid publication of these new names and combinations is the date of publication of this list, not the date of the original publication of the names and combinations. The authors of the new names and combinations are as given below. Inclusion of a name on these lists validates the publication of the name and thereby makes it available in the nomenclature of prokaryotes. The inclusion of a name on this list is not to be construed as taxonomic acceptance of the taxon to which the name is applied. Indeed, some of these names may, in time, be shown to be synonyms, or the organisms may be transferred to another genus, thus necessitating the creation of a new combination.
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Singh P, Kim YJ, Wang C, Mathiyalagan R, Yang DC. Weissella oryzae DC6-facilitated green synthesis of silver nanoparticles and their antimicrobial potential. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2015. [DOI: 10.3109/21691401.2015.1064937] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Priyanka Singh
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin, Republic of Korea
| | - Yeon J. Kim
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin, Republic of Korea
| | - Chao Wang
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin, Republic of Korea
| | - Ramya Mathiyalagan
- Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, Republic of Korea
| | - Deok C. Yang
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin, Republic of Korea
- Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, Republic of Korea
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