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Zhou JW, Muhammad J, Sun B, Yang R, Wadood A, Wang JS, Jia AQ. Metabolomic analysis of quorum sensing inhibitor hordenine on Pseudomonas aeruginosa. Appl Microbiol Biotechnol 2019; 103:6271-6285. [PMID: 31161392 DOI: 10.1007/s00253-019-09878-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/17/2019] [Accepted: 04/24/2019] [Indexed: 12/21/2022]
Abstract
Proton magnetic resonance-based metabolomics analysis was performed to determine the global metabolite changes in pathogenic bacterium Pseudomonas aeruginosa PAO1 following exposure to quorum sensing (QS) inhibitor hordenine. Pyocyanin inhibition assay confirmed that hordenine exhibited potent QS inhibitory activity. A total of 40 metabolites were assigned by PMR spectra. Hordenine treatment resulted in the destruction of QS system in P. aeruginosa PAO1 by downregulating the expressions of genes involved in QS. The synthesis of antioxidant enzymes was repressed and the oxidative stress was enhanced due to the dysfunctional QS system of P. aeruginosa PAO1. The enhanced oxidative stress induced by the dysfunctional QS system of P. aeruginosa PAO1 altered the membrane components, enhanced membrane permeability, and disturbed energy metabolism, amino acid metabolism, and nucleotide metabolism, and would ultimately attenuate the pathogenicity of P. aeruginosa PAO1. Hordenine may have promising potential for controlling nosocomial pathogens.
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Affiliation(s)
- Jin-Wei Zhou
- Key Laboratory of Tropical Biological Resources of Ministry Education, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, China.,School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Junaid Muhammad
- Department of Bioinformatic and Biostatistics, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Bing Sun
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Rui Yang
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Abdul Wadood
- Department of Biochemistry, Abdul Wali Khan University, Mardan, 23200, Pakistan
| | - Jun-Song Wang
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
| | - Ai-Qun Jia
- Key Laboratory of Tropical Biological Resources of Ministry Education, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, China. .,School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
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Li J, Fricks C, Rayment I, Caspar DLD. Reversible swelling of SBMV is associated with reversible disordering. J Struct Biol 2017. [PMID: 28647540 PMCID: PMC5784231 DOI: 10.1016/j.jsb.2017.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The structures of the compact and swollen southern bean mosaic virus (SBMV) particles have been compared by X-ray diffraction and proton magnetic resonance (PMR). Small-angle X-ray scattering showed that removal of divalent cations at alkaline pH causes the particle diameter to increase from 289 Å in the native SBMV by 12% in solution and by 9% in microcrystals. The swelling is fully reversible upon re-addition of Ca2+ and Mg2+ ions, as shown by the X-ray patterns at 6 Å resolution and by the 270 MHz PMR spectra. Beyond 30 Å resolution, X-ray patterns from the compact SBMV in solution and in microcrystals show fine fringes of ∼1/225 Å−1 width extending to 6 Å resolution, whereas patterns from the swollen SBMV in solution and in microcrystals show only broader fringes of ∼1/90 Å−1 width, Model calculations demonstrate that the fine fringes from compact SBMV arise from regular packing of the protein subunits on the icosahedral surface lattice; the smearing of fine fringes in the swollen virus pattern can be simulated by uncorrelated displacements of pentamers and hexamers of protein subunits, with a standard deviation of 6 Å from their mean locations. The PMR spectrum of compact SBMV is poorly resolved, whereas PMR spectrum of swollen SBMV shows sharp resonances in the methyl proton region. The line-narrowing for a fraction of the aliphatic protons upon swelling cannot be accounted for by rotational relaxation of the particle of 6 × 106 MW, but must be attributed to internal motion in small regions of the protein subunits.
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Affiliation(s)
- Jade Li
- Rosenstiel Basic Medical Sciences Research Center, Brandeis University, Waltham, MA 02254, USA.
| | - Carl Fricks
- Rosenstiel Basic Medical Sciences Research Center, Brandeis University, Waltham, MA 02254, USA
| | - Ivan Rayment
- Rosenstiel Basic Medical Sciences Research Center, Brandeis University, Waltham, MA 02254, USA
| | - Donald L D Caspar
- Rosenstiel Basic Medical Sciences Research Center, Brandeis University, Waltham, MA 02254, USA
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