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Lin C, Liang H, Yang X, Zhan J, Yang Q. Voltage recovery from frozen microbial fuel cells in the laboratory and outdoor field reactors. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 942:173751. [PMID: 38839000 DOI: 10.1016/j.scitotenv.2024.173751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 05/21/2024] [Accepted: 06/02/2024] [Indexed: 06/07/2024]
Abstract
Extreme temperature variations are a problem that must be faced in the practical application of microbial fuel cells (MFCs), but MFCs are not extensively described for low and even freezing temperatures. This study assessed the effect of low-temperature shock on the power generation performance and microbial community structure of MFCs. Two scales of MFCs, the small (mL-MFC) and the large (L-MFC), were constructed in the laboratory and their performance was evaluated before and after freezing at -18 °C. The experimental results demonstrate that both MFCs were capable of rapidly restoring their voltage to the previous level after thawing. For the mL-MFC (rGO/Ag), the power density recovered from 194.30 ± 10.84 mW/m2 to 195.57 ± 4.02 mW/m2 after thawing. For L-MFC (carbon felt electrodes), the power density increased significantly from the initial 1.79 mW/m2 to 173.90 mW/m2 after thawing, but the performance degradation problem after reactor amplification still needs to be solved. The sediment microbial fuel cell (SMFC) was successfully constructed and operated in a natural outdoor environment to maintain high voltage output after the period of frost. Microbial analysis indicated after the frost period, psychrotolerant microorganisms enriched on the anode, such as Flavobacterium and Psychrobacter, while the relative abundance of anaerobic methanogenic bacterium decreased. Overall, freeze-thaw operations had a non-negative impact on the performance of MFCs and provided some references for their practical applications.
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Affiliation(s)
- Chunyang Lin
- School of Chemical Engineering, Ocean and Life Sciences, Dalian University of Technology, Panjin 124221, China
| | - Haoran Liang
- School of Chemical Engineering, Ocean and Life Sciences, Dalian University of Technology, Panjin 124221, China
| | - Xiaojing Yang
- School of Chemical Engineering, Ocean and Life Sciences, Dalian University of Technology, Panjin 124221, China
| | - Jingjing Zhan
- School of Chemical Engineering, Ocean and Life Sciences, Dalian University of Technology, Panjin 124221, China
| | - Qiao Yang
- School of Chemical Engineering, Ocean and Life Sciences, Dalian University of Technology, Panjin 124221, China.
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Gong Z, Guo J, Li Q, Xie H. Molecular mechanism of lipopolysaccharide (LPS) in promoting biomineralization on bacterial surface. Biochim Biophys Acta Gen Subj 2023; 1867:130305. [PMID: 36621513 DOI: 10.1016/j.bbagen.2023.130305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/07/2023]
Abstract
Biomineralization on bacterial surface is affected by biomolecules of bacterial cell surface. Lipopolysaccharide (LPS) is the main and outermost component on the extracellular membrane of Gram-negative bacteria. In the present study, the molecular mechanism of LPS in affecting biomineralization of Ag+/Cl- colloids was investigated by taking advantages of two LPS structural deficient mutants of Escherichia coli. The two mutants were generated by impairing the expression of waaP or wbbH genes with CRISPR/Cas9 technology and it induced deficient polysaccharide chain of O-antigen (ΔwbbH) or phosphate groups of core oligosaccharide (ΔwaaP) in LPS structures. There were significant changes of the cell morphology and surface charge of the two mutants in comparing with that of wild type cells. LPS from ΔwaaP mutant showed increased ΔHITC upon interacting with free Ag+ ions than LPS from wild type cells or ΔwbbH mutant, implying the binding affinity of LPS to Ag+ ions is affected by the phosphate groups in core oligosaccharide. LPS from ΔwbbH mutant showed decreased endotherm (ΔQ) upon interacting with Ag+/Cl- colloids than LPS from wild type or ΔwaaP mutant cells, implying LPS polysaccharide chain structure is critical for stabilizing Ag+/Cl- colloids. Biomineralization of Ag+/Cl- colloids on ΔwbbH mutant cell surface showed distinctive morphology in comparison with that of wild type or ΔwaaP mutant cells, which confirmed the critical role of O-antigen of LPS in biomineralization. The present work provided molecular evidence of the relationship between LPS structure, ions, and ionic colloids in biomineralization on bacterial cell surface.
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Affiliation(s)
- Zechuan Gong
- Institute of Aix-marseille (AMU-WHU), Wuhan University of Technology, Wuhan 430070, China
| | - Junhui Guo
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China.
| | - Qichang Li
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
| | - Hao Xie
- Institute of Aix-marseille (AMU-WHU), Wuhan University of Technology, Wuhan 430070, China; School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China.
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2019-2020. MASS SPECTROMETRY REVIEWS 2022:e21806. [PMID: 36468275 DOI: 10.1002/mas.21806] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
This review is the tenth update of the original article published in 1999 on the application of matrix-assisted laser desorption/ionization (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2020. Also included are papers that describe methods appropriate to analysis by MALDI, such as sample preparation techniques, even though the ionization method is not MALDI. The review is basically divided into three sections: (1) general aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, fragmentation, quantification and the use of arrays. (2) Applications to various structural types such as oligo- and polysaccharides, glycoproteins, glycolipids, glycosides and biopharmaceuticals, and (3) other areas such as medicine, industrial processes and glycan synthesis where MALDI is extensively used. Much of the material relating to applications is presented in tabular form. The reported work shows increasing use of incorporation of new techniques such as ion mobility and the enormous impact that MALDI imaging is having. MALDI, although invented nearly 40 years ago is still an ideal technique for carbohydrate analysis and advancements in the technique and range of applications show little sign of diminishing.
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Affiliation(s)
- David J Harvey
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford, UK
- Department of Chemistry, University of Oxford, Oxford, Oxfordshire, United Kingdom
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Kokoulin MS, Dmitrenok PS, Romanenko LA. Structure of the Lipooligosaccharide from the Deep-Sea Marine Bacterium Idiomarina zobellii KMM 231 T, Isolated at a Depth of 4000 Meters. Mar Drugs 2022; 20:700. [PMID: 36355023 PMCID: PMC9695755 DOI: 10.3390/md20110700] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/06/2022] [Accepted: 11/06/2022] [Indexed: 05/31/2024] Open
Abstract
The structural characterization of lipopolysaccharides has critical implications for some biomedical applications, and marine bacteria are an inimitable source of new glyco-structures potentially usable in medicinal chemistry. On the other hand, lipopolysaccharides of marine Gram-negative bacteria present certain structural features that can help the understanding of the adaptation processes. The deep-sea marine Gram-negative bacterium Idiomarina zobellii KMM 231T, isolated from a seawater sample taken at a depth of 4000 m, represents an engaging microorganism to investigate in terms of its cell wall components. Here, we report the structural study of the R-type lipopolysaccharide isolated from I. zobellii KMM 231T that was achieved through a multidisciplinary approach comprising chemical analyses, NMR spectroscopy, and MALDI mass spectrometry. The lipooligosaccharide turned out to be characterized by a novel and unique pentasaccharide skeleton containing a very short mono-phosphorylated core region and comprising terminal neuraminic acid. The lipid A was revealed to be composed of a classical disaccharide backbone decorated by two phosphate groups and acylated by i13:0(3-OH) in amide linkage, i11:0 (3-OH) as primary ester-linked fatty acids, and i11:0 as a secondary acyl chain.
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Affiliation(s)
- Maxim S. Kokoulin
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159/2, Prospect 100 let Vladivostoku, Vladivostok 690022, Russia
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Casillo A, D’Angelo C, Parrilli E, Tutino ML, Corsaro MM. Membrane and Extracellular Matrix Glycopolymers of Colwellia psychrerythraea 34H: Structural Changes at Different Growth Temperatures. Front Microbiol 2022; 13:820714. [PMID: 35283851 PMCID: PMC8914368 DOI: 10.3389/fmicb.2022.820714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 01/11/2022] [Indexed: 11/13/2022] Open
Abstract
Colwellia psychrerythraea 34H is a marine Gram-negative psychrophile; it was isolated from Arctic marine sediments, but it is considered cosmopolitan in cold environments. This microorganism is considered a model to study adaptive strategies to sub-zero temperatures, and its lifestyle has been the object of numerous studies. In the last few years, we focused our studies on the glycoconjugates produced by C. psychrerythraea 34H at 4°C, resulting in the isolation and characterization of very interesting molecules. It produces an unusual lipooligosaccharide molecule and both capsular and medium released polysaccharides. In this study, we described the response of these glycoconjugates in terms of production and chemical structure produced by C. psychrerythraea 34H grown in planktonic conditions at −2, 4, and 8°C. The glycopolymers have been detected by chemical methods and spectroscopic analyses. Moreover, the glycopolymer content of the biofilm matrix of C. psychrerythraea 34H has been evaluated, through confocal microscopy and glycosyl analysis. The results highlighted that C. psychrerythraea 34H adjusts both the production and the typology of its glyconjugates in response to temperature fluctuations.
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Complete Lipooligosaccharide Structure from Pseudoalteromonas nigrifaciens Sq02-Rif r and Study of Its Immunomodulatory Activity. Mar Drugs 2021; 19:md19110646. [PMID: 34822517 PMCID: PMC8623723 DOI: 10.3390/md19110646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 11/16/2021] [Accepted: 11/17/2021] [Indexed: 02/06/2023] Open
Abstract
Lipopolysaccharides (LPS) are surface glycoconjugates embedded in the external leaflet of the outer membrane (OM) of the Gram-negative bacteria. They consist of three regions: lipid A, core oligosaccharide (OS), and O-specific polysaccharide or O-antigen. Lipid A is the glycolipid endotoxin domain that anchors the LPS molecule to the OM, and therefore, its chemical structure is crucial in the maintenance of membrane integrity in the Gram-negative bacteria. In this paper, we reported the characterization of the lipid A and OS structures from Pseudoalteromonas nigrifaciens Sq02-Rifr, which is a psychrotrophic Gram-negative bacterium isolated from the intestine of Seriola quinqueradiata. The immunomodulatory activity of both LPS and lipid A was also examined.
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Kokoulin MS, Kuzmich AS, Romanenko LA, Chikalovets IV. Structure and in vitro antiproliferative activity of the acidic capsular polysaccharide from the deep-sea bacterium Psychrobacter submarinus KMM 225 T. Carbohydr Polym 2021; 262:117941. [PMID: 33838818 DOI: 10.1016/j.carbpol.2021.117941] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/10/2021] [Accepted: 03/11/2021] [Indexed: 12/27/2022]
Abstract
Psychrobacter submarinus KMM 225T is a Gram-negative bacterium isolated from a sea-water sample collected at a depth of 300 m in the Northwest Pacific Ocean. Here we report the structure of the capsular polysaccharide from P. submarinus KMM 225T and its effect on the viability and colony formation of cancer cells. The glycopolymer was purified by ultracentrifugation and chromatography methods, and the structure was elucidated using NMR spectroscopy and composition analyses. The following structure of the acidic capsular polysaccharide, containing 2-acetamido-2,4,6-trideoxy-4-[(S)-3-hydroxybutyramido]-d-glucose [d-QuipNAc4N(S-Hb)] and 4,6-O-[(S)-1-carboxyethylidene]-2-acetamido-2-deoxy-d-glucose [d-GlcpNAc4,6(S-Pyr)] was established: The capsular polysaccharide slightly reduced the viability but effectively suppressed the colony formation of different types of cancer cells, of which the most pronounced inhibition was shown for the human chronic myelogenous leukemia K-562 cells.
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Affiliation(s)
- Maxim S Kokoulin
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159/2, Prospect 100 let Vladivostoku, Vladivostok, 690022, Russia.
| | - Alexandra S Kuzmich
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159/2, Prospect 100 let Vladivostoku, Vladivostok, 690022, Russia
| | - Lyudmila A Romanenko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159/2, Prospect 100 let Vladivostoku, Vladivostok, 690022, Russia
| | - Irina V Chikalovets
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159/2, Prospect 100 let Vladivostoku, Vladivostok, 690022, Russia; Far Eastern Federal University, 8, Sukhanova Str., Vladivostok, 690950, Russia
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Cary C, Cowan DA, McMinn A, Häggblom MM. Editorial: Thematic issue on polar and alpine microbiology. FEMS Microbiol Ecol 2020; 96:5875089. [PMID: 32697840 DOI: 10.1093/femsec/fiaa136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 07/07/2020] [Indexed: 11/12/2022] Open
Affiliation(s)
- Craig Cary
- International Centre for Terrestrial Antarctic Research, University of Waikato - Te Whare Wānanga o Waikato, Hamilton 3240, New Zealand
| | - Don A Cowan
- Centre for Microbial Ecology and Genomics, University of Pretoria, Hatfield 0028, Pretoria, South Africa
| | - Andrew McMinn
- Institute for Marine and Antarctic Studies, College of Science and Engineering, University of Tasmania, Battery Point, Tasmania, Australia
| | - Max M Häggblom
- Department of Biochemistry and Microbiology, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ 08901, USA
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