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Zhu H, Hu L, Rozhkova T, Wang X, Li C. Spectrophotometric analysis of bioactive metabolites and fermentation optimisation of Streptomyces sp. HU2014 with antifungal potential against Rhizoctonia solani. BIOTECHNOL BIOTEC EQ 2023. [DOI: 10.1080/13102818.2023.2178822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023] Open
Affiliation(s)
- Hongxia Zhu
- School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Plant Protection and Quarantine Department, Sumy National Agrarian University, Sumy, Sumy State, Ukraine
| | - Linfeng Hu
- School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, Henan, China
| | - Tetiana Rozhkova
- Plant Protection and Quarantine Department, Sumy National Agrarian University, Sumy, Sumy State, Ukraine
| | - Xinfa Wang
- School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, Henan, China
- Plant Protection and Quarantine Department, Sumy National Agrarian University, Sumy, Sumy State, Ukraine
| | - Chengwei Li
- College of Biological Engineering, Henan University of Technology, Zhengzhou, Henan, China
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De Silva LADS, Heo GJ. Biofilm formation of pathogenic bacteria isolated from aquatic animals. Arch Microbiol 2022; 205:36. [PMID: 36565346 DOI: 10.1007/s00203-022-03332-8] [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: 09/11/2021] [Revised: 11/06/2022] [Accepted: 11/10/2022] [Indexed: 12/25/2022]
Abstract
Bacterial biofilm formation is one of the dynamic processes, which facilitates bacteria cells to attach to a surface and accumulate as a colony. With the help of biofilm formation, pathogenic bacteria can survive by adapting to their external environment. These bacterial colonies have several resistance properties with a higher survival rate in the environment. Especially, pathogenic bacteria can grow as biofilms and can be protected from antimicrobial compounds and other substances. In aquaculture, biofilm formation by pathogenic bacteria has emerged with an increased infection rate in aquatic animals. Studies show that Vibrio anguillarum, V. parahaemolyticus, V. alginolyticus, V. harveyi, V. campbellii, V. fischeri, Aeromonas hydrophila, A. salmonicida, Yersinia ruckeri, Flavobacterium columnare, F. psychrophilum, Piscirickettsia salmonis, Edwardsiella tarda, E. ictaluri, E. piscicida, Streptococcus parauberis, and S. iniae can survive in the environment by transforming their planktonic form to biofilm form. Therefore, the present review was intended to highlight the principles behind biofilm formation, major biofilm-forming pathogenic bacteria found in aquaculture systems, gene expression of those bacterial biofilms and possible controlling methods. In addition, the possibility of these pathogenic bacteria can be a serious threat to aquaculture systems.
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Affiliation(s)
- L A D S De Silva
- Laboratory of Aquatic Animal Medicine, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Chungdae-Ro 1, Seowon-Gu, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Gang-Joon Heo
- Laboratory of Aquatic Animal Medicine, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Chungdae-Ro 1, Seowon-Gu, Cheongju, Chungbuk, 28644, Republic of Korea.
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3
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Camelo-Silva C, Verruck S, Ambrosi A, Di Luccio M. Innovation and Trends in Probiotic Microencapsulation by Emulsification Techniques. FOOD ENGINEERING REVIEWS 2022. [DOI: 10.1007/s12393-022-09315-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Muthukumaran MS, Mudgil P, Baba WN, Ayoub MA, Maqsood S. A comprehensive review on health benefits, nutritional composition and processed products of camel milk. FOOD REVIEWS INTERNATIONAL 2022. [DOI: 10.1080/87559129.2021.2008953] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- M. Selva Muthukumaran
- Department of Food Technology, Hindustan Institute of Technology and Science, Chennai, India
| | - Priti Mudgil
- Department of Food Science, College of Agriculture and Veterinary Medicine United Arab Emirates University, UAE
| | - Waqas N Baba
- Department of Food Science, College of Agriculture and Veterinary Medicine United Arab Emirates University, UAE
| | - Mohammed Akli Ayoub
- Department of Biology, College of Science, United Arab Emirates University, UAE
- Zayed Center for Health Sciences, The United Arab Emirates University, UAE
| | - Sajid Maqsood
- Department of Food Science, College of Agriculture and Veterinary Medicine United Arab Emirates University, UAE
- Zayed Center for Health Sciences, The United Arab Emirates University, UAE
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Hansen EB, Nielsen DS, LaPointe G. Editorial: microbial food and feed ingredients - functionality and health. FEMS Microbiol Lett 2021; 368:6374167. [PMID: 34551069 DOI: 10.1093/femsle/fnab120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 09/03/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Egon Bech Hansen
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 202, 2800 Kgs. Lyngby, Denmark
| | - Dennis Sandris Nielsen
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg C, Denmark
| | - Gisèle LaPointe
- Department of Food Science, Canadian Research Institute for Food Safety, University of Guelph, 43 McGilvray St, Guelph, ON N1G 2W1, Canada
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Wójcik P, Glanowski M, Wojtkiewicz AM, Rohman A, Szaleniec M. Universal capability of 3-ketosteroid Δ 1-dehydrogenases to catalyze Δ 1-dehydrogenation of C17-substituted steroids. Microb Cell Fact 2021; 20:119. [PMID: 34162386 PMCID: PMC8220720 DOI: 10.1186/s12934-021-01611-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 06/11/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND 3-Ketosteroid Δ1-dehydrogenases (KSTDs) are the enzymes involved in microbial cholesterol degradation and modification of steroids. They catalyze dehydrogenation between C1 and C2 atoms in ring A of the polycyclic structure of 3-ketosteroids. KSTDs substrate spectrum is broad, even though most of them prefer steroids with small substituents at the C17 atom. The investigation of the KSTD's substrate specificity is hindered by the poor solubility of the hydrophobic steroids in aqueous solutions. In this paper, we used 2-hydroxpropyl-β-cyclodextrin (HBC) as a solubilizing agent in a study of the KSTDs steady-state kinetics and demonstrated that substrate bioavailability has a pivotal impact on enzyme specificity. RESULTS Molecular dynamics simulations on KSTD1 from Rhodococcus erythropolis indicated no difference in ΔGbind between the native substrate, androst-4-en-3,17-dione (AD; - 8.02 kcal/mol), and more complex steroids such as cholest-4-en-3-one (- 8.40 kcal/mol) or diosgenone (- 6.17 kcal/mol). No structural obstacle for binding of the extended substrates was also observed. Following this observation, our kinetic studies conducted in the presence of HBC confirmed KSTD1 activity towards both types of steroids. We have compared the substrate specificity of KSTD1 to the other enzyme known for its activity with cholest-4-en-3-one, KSTD from Sterolibacterium denitrificans (AcmB). The addition of solubilizing agent caused AcmB to exhibit a higher affinity to cholest-4-en-3-one (Ping-Pong bi bi KmA = 23.7 μM) than to AD (KmA = 529.2 μM), a supposedly native substrate of the enzyme. Moreover, we have isolated AcmB isoenzyme (AcmB2) and showed that conversion of AD and cholest-4-en-3-one proceeds at a similar rate. We demonstrated also that the apparent specificity constant of AcmB for cholest-4-en-3-one (kcat/KmA = 9.25∙106 M-1 s-1) is almost 20 times higher than measured for KSTD1 (kcat/KmA = 4.71∙105 M-1 s-1). CONCLUSIONS We confirmed the existence of AcmB preference for a substrate with an undegraded isooctyl chain. However, we showed that KSTD1 which was reported to be inactive with such substrates can catalyze the reaction if the solubility problem is addressed.
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Affiliation(s)
- Patrycja Wójcik
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30239, Krakow, Poland
| | - Michał Glanowski
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30239, Krakow, Poland
| | - Agnieszka M Wojtkiewicz
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30239, Krakow, Poland
| | - Ali Rohman
- Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Surabaya, 60115, Indonesia
- Laboratory of Proteomics, Research Center for Bio-Molecule Engineering (BIOME), Universitas Airlangga, Surabaya, 60115, Indonesia
- Laboratory of Biophysical Chemistry, University of Groningen, 9747 AG, Groningen, The Netherlands
| | - Maciej Szaleniec
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30239, Krakow, Poland.
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Robbins SJ, Song W, Engelberts JP, Glasl B, Slaby BM, Boyd J, Marangon E, Botté ES, Laffy P, Thomas T, Webster NS. A genomic view of the microbiome of coral reef demosponges. THE ISME JOURNAL 2021; 15:1641-1654. [PMID: 33469166 PMCID: PMC8163846 DOI: 10.1038/s41396-020-00876-9] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 11/23/2020] [Accepted: 12/07/2020] [Indexed: 01/30/2023]
Abstract
Sponges underpin the productivity of coral reefs, yet few of their microbial symbionts have been functionally characterised. Here we present an analysis of ~1200 metagenome-assembled genomes (MAGs) spanning seven sponge species and 25 microbial phyla. Compared to MAGs derived from reef seawater, sponge-associated MAGs were enriched in glycosyl hydrolases targeting components of sponge tissue, coral mucus and macroalgae, revealing a critical role for sponge symbionts in cycling reef organic matter. Further, visualisation of the distribution of these genes amongst symbiont taxa uncovered functional guilds for reef organic matter degradation. Genes for the utilisation of sialic acids and glycosaminoglycans present in sponge tissue were found in specific microbial lineages that also encoded genes for attachment to sponge-derived fibronectins and cadherins, suggesting these lineages can utilise specific structural elements of sponge tissue. Further, genes encoding CRISPR and restriction-modification systems used in defence against mobile genetic elements were enriched in sponge symbionts, along with eukaryote-like gene motifs thought to be involved in maintaining host association. Finally, we provide evidence that many of these sponge-enriched genes are laterally transferred between microbial taxa, suggesting they confer a selective advantage within the sponge niche and therefore play a critical role in host ecology and evolution.
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Affiliation(s)
- S J Robbins
- Australian Centre for Ecogenomics, University of Queensland, Brisbane, QLD, 4072, Australia
| | - W Song
- Centre for Marine Science & Innovation, University of New South Wales, Kensington, NSW, 2052, Australia
| | - J P Engelberts
- Australian Centre for Ecogenomics, University of Queensland, Brisbane, QLD, 4072, Australia
| | - B Glasl
- Australian Institute of Marine Science, Townsville, QLD, 4810, Australia
| | - B M Slaby
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105, Kiel, Germany
| | - J Boyd
- Australian Centre for Ecogenomics, University of Queensland, Brisbane, QLD, 4072, Australia
| | - E Marangon
- Australian Institute of Marine Science, Townsville, QLD, 4810, Australia
- College of Science and Engineering, James Cook University, Townsville, QLD, 4810, Australia
| | - E S Botté
- Australian Institute of Marine Science, Townsville, QLD, 4810, Australia
| | - P Laffy
- Australian Institute of Marine Science, Townsville, QLD, 4810, Australia
| | - T Thomas
- Centre for Marine Science & Innovation, University of New South Wales, Kensington, NSW, 2052, Australia
| | - N S Webster
- Australian Centre for Ecogenomics, University of Queensland, Brisbane, QLD, 4072, Australia.
- Australian Institute of Marine Science, Townsville, QLD, 4810, Australia.
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Interplay of two transcription factors for recruitment of the chromatin remodeling complex modulates fungal nitrosative stress response. Nat Commun 2021; 12:2576. [PMID: 33958593 PMCID: PMC8102577 DOI: 10.1038/s41467-021-22831-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 03/25/2021] [Indexed: 02/03/2023] Open
Abstract
Nitric oxide (NO) is a diffusible signaling molecule that modulates animal and plant immune responses. In addition, reactive nitrogen species derived from NO can display antimicrobial activities by reacting with microbial cellular components, leading to nitrosative stress (NS) in pathogens. Here, we identify FgAreB as a regulator of the NS response in Fusarium graminearum, a fungal pathogen of cereal crops. FgAreB serves as a pioneer transcription factor for recruitment of the chromatin-remodeling complex SWI/SNF at the promoters of genes involved in the NS response, thus promoting their transcription. FgAreB plays important roles in fungal infection and growth. Furthermore, we show that a transcription repressor (FgIxr1) competes with the SWI/SNF complex for FgAreB binding, and negatively regulates the NS response. NS, in turn, promotes the degradation of FgIxr1, thus enhancing the recruitment of the SWI/SNF complex by FgAreB.
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Mar MJ, Andersen JM, Kandasamy V, Liu J, Solem C, Jensen PR. Synergy at work: linking the metabolism of two lactic acid bacteria to achieve superior production of 2-butanol. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:45. [PMID: 32180827 PMCID: PMC7065357 DOI: 10.1186/s13068-020-01689-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 02/26/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND The secondary alcohol 2-butanol has many important applications, e.g., as a solvent. Industrially, it is usually made by sulfuric acid-catalyzed hydration of butenes. Microbial production of 2-butanol has also been attempted, however, with little success as witnessed by the low titers and yields reported. Two important reasons for this, are the growth-hampering effect of 2-butanol on microorganisms, and challenges associated with one of the key enzymes involved in its production, namely diol dehydratase. RESULTS We attempt to link the metabolism of an engineered Lactococcus lactis strain, which possesses all enzyme activities required for fermentative production of 2-butanol from glucose, except for diol dehydratase, which acts on meso-2,3-butanediol (mBDO), with that of a Lactobacillus brevis strain which expresses a functional dehydratase natively. We demonstrate growth-coupled production of 2-butanol by the engineered L. lactis strain, when co-cultured with L. brevis. After fine-tuning the co-culture setup, a titer of 80 mM (5.9 g/L) 2-butanol, with a high yield of 0.58 mol/mol is achieved. CONCLUSIONS Here, we demonstrate that it is possible to link the metabolism of two bacteria to achieve redox-balanced production of 2-butanol. Using a simple co-cultivation setup, we achieved the highest titer and yield from glucose in a single fermentation step ever reported. The data highlight the potential that lies in harnessing microbial synergies for producing valuable compounds.
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Affiliation(s)
- Mette J. Mar
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 201, 2800 Kgs. Lyngby, Denmark
| | - Joakim M. Andersen
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 201, 2800 Kgs. Lyngby, Denmark
| | - Vijayalakshmi Kandasamy
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 201, 2800 Kgs. Lyngby, Denmark
| | - Jianming Liu
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 201, 2800 Kgs. Lyngby, Denmark
| | - Christian Solem
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 201, 2800 Kgs. Lyngby, Denmark
| | - Peter R. Jensen
- National Food Institute, Technical University of Denmark, Kemitorvet, Building 201, 2800 Kgs. Lyngby, Denmark
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Bajić SS, Đokić J, Dinić M, Tomić S, Popović N, Brdarić E, Golić N, Tolinački M. GABA potentiate the immunoregulatory effects of Lactobacillus brevis BGZLS10-17 via ATG5-dependent autophagy in vitro. Sci Rep 2020; 10:1347. [PMID: 31992761 PMCID: PMC6987229 DOI: 10.1038/s41598-020-58177-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 01/13/2020] [Indexed: 01/11/2023] Open
Abstract
The characterization of mechanisms involved in the positive effects of probiotic bacteria in various pathophysiological conditions is a prerogative for their safe and efficient application in biomedicine. We have investigated the immunological effects of live bacteria-free supernatant collected from GABA-producing Lactobacillus brevis BGZLS10-17 on Concanavalin A-stimulated mesenteric lymph node cells (MLNC), an in vitro model of activated immune cells. We have shown that GABA containing and GABA-free supernatant of Lactobacillus brevis BGZLS10-17 have strong immunoregulatory effects on MLNC. Further, GABA produced by this strain exhibit additional inhibitory effects on proliferation, IFN-γ and IL-17 production by MLNC, and the expression of MHCII and CD80 on antigen presenting cells. At the other hand, GABA-containing supernatants displayed the strongest stimulatory effects on the expression of immunoregulatory molecules, such as Foxp3+, IL-10, TGF-β, CTLA4 and SIRP-α. By looking for the mechanisms of actions, we found that supernatants produced by BGZLS10-17 induce autophagy in different MLNC, such as CD4+ and CD8+ T lymphocytes, NK and NKT cells, as well as antigen presenting cells. Further, we showed that the stimulation of Foxp3+, IL-10 and TGF-β expression by BGZLS10-17 produced GABA is completely mediated by the induction of ATG5 dependent autophagy, and that other molecules in the supernatants display GABA-, ATG5-, Foxp3+-, IL-10- and TGF-β- independent, immunoregulatory effects.
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Affiliation(s)
- Svetlana Soković Bajić
- Laboratory for Molecular Microbiology (LMM), Institute of Molecular Genetics and Genetic Engineering (IMGGI), University of Belgrade, Belgrade, Serbia
| | - Jelena Đokić
- Laboratory for Molecular Microbiology (LMM), Institute of Molecular Genetics and Genetic Engineering (IMGGI), University of Belgrade, Belgrade, Serbia.
| | - Miroslav Dinić
- Laboratory for Molecular Microbiology (LMM), Institute of Molecular Genetics and Genetic Engineering (IMGGI), University of Belgrade, Belgrade, Serbia
| | - Sergej Tomić
- Department for Immunology and Immunoparasitology, Institute for the Application of Nuclear Energy, University of Belgrade, Belgrade, Serbia
| | - Nikola Popović
- Laboratory for Molecular Microbiology (LMM), Institute of Molecular Genetics and Genetic Engineering (IMGGI), University of Belgrade, Belgrade, Serbia
| | - Emilija Brdarić
- Laboratory for Molecular Microbiology (LMM), Institute of Molecular Genetics and Genetic Engineering (IMGGI), University of Belgrade, Belgrade, Serbia
| | - Nataša Golić
- Laboratory for Molecular Microbiology (LMM), Institute of Molecular Genetics and Genetic Engineering (IMGGI), University of Belgrade, Belgrade, Serbia
| | - Maja Tolinački
- Laboratory for Molecular Microbiology (LMM), Institute of Molecular Genetics and Genetic Engineering (IMGGI), University of Belgrade, Belgrade, Serbia
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