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Winther AR, Salehian Z, Bøe CA, Nesdal M, Håvarstein LS, Kjos M, Straume D. Decreased susceptibility to viscosin in Streptococcus pneumoniae. Microbiol Spectr 2024; 12:e0062424. [PMID: 38958463 PMCID: PMC11302323 DOI: 10.1128/spectrum.00624-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Accepted: 05/30/2024] [Indexed: 07/04/2024] Open
Abstract
Growing numbers of infections caused by antibiotic-resistant Streptococcus pneumoniae strains are a major concern for healthcare systems that will require new antibiotics for treatment as well as preventative measures that reduce the number of infections. Lipopeptides are antimicrobial molecules, of which some are used as antibiotics, including the last resort antibiotics daptomycin and polymyxins. Here we have studied the antimicrobial effect of the cyclic lipopeptide viscosin on S. pneumoniae growth and morphology. Most lipopeptides function as surfactants that create pores in membrane layers, which is regarded as their main antimicrobial activity. We show that viscosin can inhibit growth of S. pneumoniae without disintegration of the cytoplasmic membrane. Instead, the cells developed abnormal shapes and misplaced new division sites. The cell wall of these bacteria appeared less dense in electron microscopy images, suggesting that viscosin interfered with normal cell wall synthesis. Corroborating this observation, a luciferase reporter assay was used to show that the two-component systems LiaFSR and CiaRH, which are known to be activated upon cell wall stress, were strongly induced by viscosin. Furthermore, a mutant displaying 1.8-fold decreased susceptibility to viscosin was generated by sequential exposure to increasing concentrations of the lipopeptide. The mutant suffered from significant fitness loss and had mutations in genes involved in fatty acid synthesis, teichoic acid synthesis, and cell wall synthesis as well as transcription and translation. How these mutations might be linked to decreased viscosin susceptibility is discussed.IMPORTANCEStreptococcus pneumoniae is a leading cause of bacterial pneumonia, sepsis, and meningitis in children, and the incidence of infections caused by antibiotic-resistant strains is increasing. Development of new antibiotics is therefore necessary to treat these types of infections in the future. Here, we have studied the activity of the antimicrobial lipopeptide viscosin on S. pneumoniae and show that in addition to having the typical membrane destabilizing activity of lipopeptides, viscosin inhibits pneumococcal growth by obstructing normal cell wall synthesis. This suggests a more specific mode of action than just the surfactant activity. Furthermore, we show that S. pneumoniae does not easily acquire resistance to viscosin, which makes it a promising molecule to explore further, for example, by synthesizing less toxic derivates that can be tested for therapeutic potential.
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Affiliation(s)
- Anja Ruud Winther
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
| | - Zhian Salehian
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
| | | | - Malene Nesdal
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
| | - Leiv Sigve Håvarstein
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
| | - Morten Kjos
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
| | - Daniel Straume
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
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Ma Z, Yang X, Sheng J. WLIP, WLIPβ, and WLIPγ Produced from Pseudomonas canadensis Q3-1 via Precursor-Directed Biosynthesis and Their Roles on Biocontrol of Phytophthora Blight in Peppers. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:4063-4073. [PMID: 38364207 DOI: 10.1021/acs.jafc.3c07360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
Abstract
White line-inducing principle (WLIP, 1), together with two new cyclic lipopeptides (CLPs) WLIPβ (2) and WLIPγ (3), were characterized from the supernatant of Pseudomonas canadensis Q3-1 via precursor-directed biosynthesis (PDB) in the current study. They were purified from the supernatant of P. canadensis Q3-1 by solid-phase extraction (SPE) and high-performance liquid chromatography (HPLC), and their structures were mainly determined via bioinformatic analyses, spectrometric and spectroscopic techniques, as well as single crystal X-ray diffraction (XRD). These WLIPs share (R)-3-hydroxydecanoic acid (HDA), but they differ from each other in the composition of peptidic sequences. In addition, these CLPs showed biocontrol activities against Phytophthora blight (caused by Phytophthora capsici) in peppers. Collectively, this study has shown that PDB could be used for generating new CLPs in Pseudomonas spp. Moreover, we have confirmed that WLIP, WLIPβ, and WLIPγ could be used as lead agrochemicals to control Phytophthora blight in peppers.
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Affiliation(s)
- Zongwang Ma
- College of Life Science, Northwest Normal University, East Anning Road 967, Lanzhou 730070, China
| | - Xiao Yang
- College of Life Science, Northwest Normal University, East Anning Road 967, Lanzhou 730070, China
| | - Jun Sheng
- College of Life Science, Northwest Normal University, East Anning Road 967, Lanzhou 730070, China
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Zhou L, Höfte M, Hennessy RC. Does regulation hold the key to optimizing lipopeptide production in Pseudomonas for biotechnology? Front Bioeng Biotechnol 2024; 12:1363183. [PMID: 38476965 PMCID: PMC10928948 DOI: 10.3389/fbioe.2024.1363183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 02/12/2024] [Indexed: 03/14/2024] Open
Abstract
Lipopeptides (LPs) produced by Pseudomonas spp. are specialized metabolites with diverse structures and functions, including powerful biosurfactant and antimicrobial properties. Despite their enormous potential in environmental and industrial biotechnology, low yield and high production cost limit their practical use. While genome mining and functional genomics have identified a multitude of LP biosynthetic gene clusters, the regulatory mechanisms underlying their biosynthesis remain poorly understood. We propose that regulation holds the key to unlocking LP production in Pseudomonas for biotechnology. In this review, we summarize the structure and function of Pseudomonas-derived LPs and describe the molecular basis for their biosynthesis and regulation. We examine the global and specific regulator-driven mechanisms controlling LP synthesis including the influence of environmental signals. Understanding LP regulation is key to modulating production of these valuable compounds, both quantitatively and qualitatively, for industrial and environmental biotechnology.
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Affiliation(s)
- Lu Zhou
- Laboratory of Phytopathology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Monica Höfte
- Laboratory of Phytopathology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Rosanna C. Hennessy
- Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
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Shi C, Yang X, Wang P, Zhang H, Wang Q, Wang B, Oyom W, Zhang W, Wen P. Screening of Lactiplantibacillus plantarum NML21 and Its Maintenance on Postharvest Quality of Agaricus bisporus through Anti-Browning and Mitigation of Oxidative Damage. Foods 2024; 13:168. [PMID: 38201195 PMCID: PMC10778869 DOI: 10.3390/foods13010168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 12/28/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
Browning and other undesirable effects on Agaricus bisporus (A. bisporus) during storage seriously affect its commercial value. In this study, a strain, Lactiplantibacillus plantarum NML21, that resists browning and delays the deterioration of A. bisporus was screened among 72 strains of lactic acid bacteria (LAB), and its preservative effect was analyzed. The results demonstrated that gallic acid, catechin, and protocatechuic acid promoted the growth of NML21, and the strain conversion rates of gallic acid and protocatechuic acid reached 97.16% and 95.85%, respectively. During a 15 d storage of the samples, the NML21 treatment displayed a reduction in the browning index (58.4), weight loss (2.64%), respiration rate (325.45 mg kg-1 h-1), and firmness (0.65 N). The treatment further inhibited Pseudomonas spp. growth and polyphenol oxidase activity, improved the antioxidant capacity, reduced the accumulation of reactive oxygen species, and reduced the malonaldehyde content and cell membrane conductivity. Taken together, the optimized concentrations of NML21 may extend the shelf life of A. bisporus for 3-6 d and could be a useful technique for preserving fresh produce.
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Affiliation(s)
- Chengrui Shi
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China; (C.S.); (Q.W.)
| | - Xiaoli Yang
- Gansu Institute of Business and Technology Co., Lanzhou 730070, China;
| | - Pengjie Wang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (P.W.); (H.Z.)
| | - Hao Zhang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (P.W.); (H.Z.)
| | - Qihui Wang
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China; (C.S.); (Q.W.)
| | - Bo Wang
- Lanzhou Customs Technology Center, Lanzhou 730070, China;
| | - William Oyom
- Food and Nutritional Sciences Program, North Carolina Agricultural and Technical State University, Greensboro, NC 27411, USA;
| | - Weibing Zhang
- Functional Dairy Products Engineering Lab., Gansu Agricultural University, Lanzhou 730070, China
| | - Pengcheng Wen
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China; (C.S.); (Q.W.)
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Ciurko D, Chebbi A, Kruszelnicki M, Czapor-Irzabek H, Urbanek AK, Polowczyk I, Franzetti A, Janek T. Production and characterization of lipopeptide biosurfactant from a new strain of Pseudomonas antarctica 28E using crude glycerol as a carbon source. RSC Adv 2023; 13:24129-24139. [PMID: 37577095 PMCID: PMC10415746 DOI: 10.1039/d3ra03408a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 08/07/2023] [Indexed: 08/15/2023] Open
Abstract
Pseudomonas is a cosmopolitan genus of bacteria found in soil, water, organic matter, plants and animals and known for the production of glycolipid and lipopeptide biosurfactants. In this study bacteria (laboratory collection number 28E) isolated from soil collected in Spitsbergen were used for biosurfactant production. 16S rRNA sequencing and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF) revealed that this isolate belongs to the species Pseudomonas antarctica. In the present study, crude glycerol, a raw material obtained from several industrial processes, was evaluated as a potential low-cost carbon source to reduce the costs of lipopeptide production. Among several tested glycerols, a waste product of stearin production, rich in nitrogen, iron and calcium, ensured optimal conditions for bacterial growth. Biosurfactant production was evidenced by a reduction of surface tension (ST) and an increase in the emulsification index (E24%). According to Fourier-transform infrared spectroscopy (FTIR) and electrospray ionization mass spectrometry (ESI-MS), the biosurfactant was identified as viscosin. The critical micelle concentration (CMC) of lipopeptide was determined to be 20 mg L-1. Interestingly, viscosin production has been reported previously for Pseudomonas viscosa, Pseudomonas fluorescens and Pseudomonas libanensis. To the best of our knowledge, this is the first report on viscosin production by a P. antarctica 28E. The results indicated the potential of crude glycerol as a low-cost substrate to produce a lipopeptide biosurfactant with promising tensioactive and emulsifying properties.
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Affiliation(s)
- Dominika Ciurko
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences 51-630 Wrocław Poland +48-71-320-7734
| | - Alif Chebbi
- Department of Science, Roma Tre University 00146 Rome Italy
| | - Mateusz Kruszelnicki
- Department of Process Engineering and Technology of Polymers and Carbon Materials, Wroclaw University of Science and Technology 50-370 Wrocław Poland
| | - Hanna Czapor-Irzabek
- Laboratory of Elemental Analysis and Structural Research, Wroclaw Medical University 50-556 Wroclaw Poland
| | - Aneta K Urbanek
- Faculty of Biotechnology, University of Wroclaw 50-383 Wroclaw Poland
| | - Izabela Polowczyk
- Department of Process Engineering and Technology of Polymers and Carbon Materials, Wroclaw University of Science and Technology 50-370 Wrocław Poland
| | - Andrea Franzetti
- Department of Earth and Environmental Sciences - DISAT, University of Milano-Bicocca 20126 Milano Italy
| | - Tomasz Janek
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences 51-630 Wrocław Poland +48-71-320-7734
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Steigenberger J, Mergen C, De Roo V, Geudens N, Martins JC, Heerklotz H. The effect of membrane thickness on the membrane permeabilizing activity of the cyclic lipopeptide tolaasin II. Front Mol Biosci 2022; 9:1064742. [PMID: 36619163 PMCID: PMC9817028 DOI: 10.3389/fmolb.2022.1064742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 11/21/2022] [Indexed: 12/25/2022] Open
Abstract
Tolaasin II is an amphiphilic, membrane-active, cyclic lipopeptide produced by Pseudomonas tolaasii and is responsible for brown blotch disease in mushroom. To better understand the mode of action and membrane selectivity of tolaasin II and related lipopeptides, its permeabilizing effect on liposomes of different membrane thickness was characterized. An equi-activity analysis served to distinguish between the effects of membrane partitioning and the intrinsic activity of the membrane-bound peptide. It was found that thicker membranes require higher local peptide concentrations to become leaky. More specifically, the mole ratio of membrane-bound peptide per lipid needed to induce 50% leakage of calcein within 1 h, Re 50, increased monotonically with membrane thickness from 0.0016 for the 14:1 to 0.0070 for the 20:1 lipid-chains. Moreover, fast but limited leakage kinetics in the low-lipid regime were observed implying a mode of action based on membrane asymmetry stress in this time and concentration window. While the assembly of the peptide to oligomeric pores of defined length along the bilayer z-axis can in principle explain inhibition by increasing membrane thickness, it cannot account for the observed limited leakage. Therefore, reduced intrinsic membrane-permeabilizing activity with increasing membrane thickness is attributed here to the increased mechanical strength and order of thicker membranes.
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Affiliation(s)
- Jessica Steigenberger
- Department of Pharmaceutics, Institute of Pharmaceutical Sciences, University of Freiburg, Freiburg, Germany,*Correspondence: Jessica Steigenberger, ; Heiko Heerklotz,
| | - Catherine Mergen
- Department of Pharmaceutics, Institute of Pharmaceutical Sciences, University of Freiburg, Freiburg, Germany
| | - Vic De Roo
- NMR and Structure Analysis Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Niels Geudens
- NMR and Structure Analysis Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - José C. Martins
- NMR and Structure Analysis Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Heiko Heerklotz
- Department of Pharmaceutics, Institute of Pharmaceutical Sciences, University of Freiburg, Freiburg, Germany,Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, Canada,Signaling Research Centers BIOSS and CIBSS, University of Freiburg, Freiburg, Germany,*Correspondence: Jessica Steigenberger, ; Heiko Heerklotz,
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7
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Bioactive Lipodepsipeptides Produced by Bacteria and Fungi. Int J Mol Sci 2022; 23:ijms232012342. [DOI: 10.3390/ijms232012342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/04/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022] Open
Abstract
Natural products are a vital source for agriculture, medicine, cosmetics and other fields. Lipodepsipeptides (LPDs) are a wide group of natural products distributed among living organisms such as bacteria, fungi, yeasts, virus, insects, plants and marine organisms. They are a group of compounds consisting of a lipid connected to a peptide, which are able to self-assemble into several different structures. They have shown different biological activities such as phytotoxic, antibiotic, antiviral, antiparasitic, antifungal, antibacterial, immunosuppressive, herbicidal, cytotoxic and hemolytic activities. Their biological activities seem to be due to their interactions with the plasma membrane (MP) because they are able to mimic the architecture of the native membranes interacting with their hydrophobic segment. LPDs also have surfactant properties. The review has been focused on the lipodepsipeptides isolated from fungal and bacterial sources, on their biological activity, on the structure–activity relationships of some selected LPD subgroups and on their potential application in agriculture and medicine. The chemical and biological characterization of lipodepsipeptides isolated in the last three decades and findings that resulted from SCI-FINDER research are reported. A critical evaluation of the most recent reviews dealing with the same argument has also been described.
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Castaldi S, Cimmino A, Masi M, Evidente A. Bacterial Lipodepsipeptides and Some of Their Derivatives and Cyclic Dipeptides as Potential Agents for Biocontrol of Pathogenic Bacteria and Fungi of Agrarian Plants. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:4591-4598. [PMID: 35395154 PMCID: PMC9026286 DOI: 10.1021/acs.jafc.1c08139] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 03/01/2022] [Accepted: 03/23/2022] [Indexed: 06/02/2023]
Abstract
Biotic stresses (fungi, bacteria, insects, weeds, etc.) are some of the most important causes of the decrease in the quality and quantity of crops that could become an emergency due to a noteworthy increase in the world population. Thus, to overcome these problems, massive use of chemical pesticides has been carried out with heavy consequences for environmental pollution and food safety. An eco-friendly alternative can be using natural compound-based biopesticides with high efficacy and selectivity. Some bacterial lipodepsipeptides (tolaasins I, II, A, D, and E and WLIP together with hexacetyl- and tetrahydro-tolaasin I and WLIP methyl ester) and cyclic dipeptides (cyclo(l-Pro-l-Tyr), cyclo(d-Pro-l-Tyr), cyclo(l-Pro-l-Val), and cyclo(l-Pro-l-Leu)) were assayed against several pathogenic bacteria and fungi of important agrarian plants. Lipodepsipeptides showed strong growth inhibition of all microorganisms tested in the range of 0.1-0.8 μg/mL, while cyclodipeptides, despite preserving this ability, showed a noteworthily reduced antimicrobial activity being active only in the range of 15-900 μg/mL. Among the lipodepsipeptides and cyclic dipeptides assayed, tolaasin d and cyclo(l-Pro-l-Tyr) (also named maculosin-1) appeared to be the most toxic compounds. Some structure-activity relationships of lipodepsipeptides were also discussed along with their practical application as biopesticides in agriculture.
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Affiliation(s)
- Stefany Castaldi
- Department
of Biology, University of Naples Federico
II, Complesso Universitario
Monte S. Angelo, 80126 Napoli, Italy
| | - Alessio Cimmino
- Department
of Chemical Sciences, University of Naples
Federico II, Complesso
Universitario Monte S. Angelo, 80126 Napoli, Italy
| | - Marco Masi
- Department
of Chemical Sciences, University of Naples
Federico II, Complesso
Universitario Monte S. Angelo, 80126 Napoli, Italy
| | - Antonio Evidente
- Department
of Chemical Sciences, University of Naples
Federico II, Complesso
Universitario Monte S. Angelo, 80126 Napoli, Italy
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9
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Braat N, Koster MC, Wösten HA. Beneficial interactions between bacteria and edible mushrooms. FUNGAL BIOL REV 2022. [DOI: 10.1016/j.fbr.2021.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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10
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Oni FE, Esmaeel Q, Onyeka JT, Adeleke R, Jacquard C, Clement C, Gross H, Ait Barka E, Höfte M. Pseudomonas Lipopeptide-Mediated Biocontrol: Chemotaxonomy and Biological Activity. Molecules 2022; 27:372. [PMID: 35056688 PMCID: PMC8777863 DOI: 10.3390/molecules27020372] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/29/2021] [Accepted: 01/05/2022] [Indexed: 12/14/2022] Open
Abstract
Pseudomonas lipopeptides (Ps-LPs) play crucial roles in bacterial physiology, host-microbe interactions and plant disease control. Beneficial LP producers have mainly been isolated from the rhizosphere, phyllosphere and from bulk soils. Despite their wide geographic distribution and host range, emerging evidence suggests that LP-producing pseudomonads and their corresponding molecules display tight specificity and follow a phylogenetic distribution. About a decade ago, biocontrol LPs were mainly reported from the P. fluorescens group, but this has drastically advanced due to increased LP diversity research. On the one hand, the presence of a close-knit relationship between Pseudomonas taxonomy and the molecule produced may provide a startup toolbox for the delineation of unknown LPs into existing (or novel) LP groups. Furthermore, a taxonomy-molecule match may facilitate decisions regarding antimicrobial activity profiling and subsequent agricultural relevance of such LPs. In this review, we highlight and discuss the production of beneficial Ps-LPs by strains situated within unique taxonomic groups and the lineage-specificity and coevolution of this relationship. We also chronicle the antimicrobial activity demonstrated by these biomolecules in limited plant systems compared with multiple in vitro assays. Our review further stresses the need to systematically elucidate the roles of diverse Ps-LP groups in direct plant-pathogen interactions and in the enhancement of plant innate immunity.
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Affiliation(s)
- Feyisara Eyiwumi Oni
- Université de Reims Champagne Ardenne, Unité de Recherche RIBP EA4707 USC INRAE 1488, SFR Condorcet FR CNRS 3417, 51100 Reims, France; (Q.E.); (C.J.); (C.C.); (E.A.B.)
- Department of Biological Sciences, Faculty of Science, Anchor University, Ayobo P.M.B 00001, Lagos State, Nigeria
- Unit for Environmental Sciences and Management, Faculty of Natural and Agricultural Sciences, North-West University, Potchefstroom 2520, South Africa;
| | - Qassim Esmaeel
- Université de Reims Champagne Ardenne, Unité de Recherche RIBP EA4707 USC INRAE 1488, SFR Condorcet FR CNRS 3417, 51100 Reims, France; (Q.E.); (C.J.); (C.C.); (E.A.B.)
| | - Joseph Tobias Onyeka
- Plant Pathology Unit, National Root Crops Research Institute (NRCRI), Umudike 440001, Abia State, Nigeria;
| | - Rasheed Adeleke
- Unit for Environmental Sciences and Management, Faculty of Natural and Agricultural Sciences, North-West University, Potchefstroom 2520, South Africa;
| | - Cedric Jacquard
- Université de Reims Champagne Ardenne, Unité de Recherche RIBP EA4707 USC INRAE 1488, SFR Condorcet FR CNRS 3417, 51100 Reims, France; (Q.E.); (C.J.); (C.C.); (E.A.B.)
| | - Christophe Clement
- Université de Reims Champagne Ardenne, Unité de Recherche RIBP EA4707 USC INRAE 1488, SFR Condorcet FR CNRS 3417, 51100 Reims, France; (Q.E.); (C.J.); (C.C.); (E.A.B.)
| | - Harald Gross
- Department of Pharmaceutical Biology, Institute of Pharmaceutical Sciences, University of Tubingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany;
| | - Essaid Ait Barka
- Université de Reims Champagne Ardenne, Unité de Recherche RIBP EA4707 USC INRAE 1488, SFR Condorcet FR CNRS 3417, 51100 Reims, France; (Q.E.); (C.J.); (C.C.); (E.A.B.)
| | - Monica Höfte
- Laboratory of Phytopathology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium;
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Dagher F, Nickzad A, Zheng J, Hoffmann M, Déziel E. Characterization of the biocontrol activity of three bacterial isolates against the phytopathogen Erwinia amylovora. Microbiologyopen 2021; 10:e1202. [PMID: 34180603 PMCID: PMC8182272 DOI: 10.1002/mbo3.1202] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/10/2021] [Accepted: 05/13/2021] [Indexed: 01/21/2023] Open
Abstract
Antibiotics are sprayed on apple and pear orchards to control, among other pathogens, the bacterium Erwinia amylovora, the causative agent of fire blight. As with many other pathogens, we observe the emergence of antibiotic-resistant strains of E. amylovora. Consequently, growers are looking for alternative solutions to combat fire blight. To find alternatives to antibiotics against this pathogen, we have previously isolated three bacterial strains with antagonistic and extracellular activity against E. amylovora, both in vitro and in planta, corresponding to three different bacterial genera: Here, we identified the inhibitory mode of action of each of the three isolates against E. amylovora. Isolate Bacillus amyloliquefaciens subsp. plantarum (now B. velezensis) FL50S produces several secondary metabolites including surfactins, iturins, and fengycins. Specifically, we identified oxydifficidin as the most active against E. amylovora S435. Pseudomonas poae FL10F produces an active extracellular compound against E. amylovora S435 that can be attributed to white-line-inducing principle (WLIP), a cyclic lipopeptide belonging to the viscosin subfamily (massetolide E, F, L, or viscosin). Pantoea agglomerans NY60 has a direct cell-to-cell antagonistic effect against E. amylovora S435. By screening mutants of this strain generated by random transposon insertion with decreased antagonist activity against strain S435, we identified several defective transposants. Of particular interest was a mutant in a gene coding for a Major Facilitator Superfamily (MFS) transporter corresponding to a transmembrane protein predicted to be involved in the extracytoplasmic localization of griseoluteic acid, an intermediate in the biosynthesis of the broad-spectrum phenazine antibiotic D-alanylgriseoluteic acid.
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Affiliation(s)
- Fadi Dagher
- Centre Armand‐Frappier Santé Biotechnologie, Institut national de la recherche scientifique (INRS)LavalQuébecH7V 1B7Canada
| | - Arvin Nickzad
- Centre Armand‐Frappier Santé Biotechnologie, Institut national de la recherche scientifique (INRS)LavalQuébecH7V 1B7Canada
| | - Jie Zheng
- US Food and Drug Administration Regulatory Science Center for Food Safety and Applied NutritionCollege ParkMarylandUSA
| | - Maria Hoffmann
- US Food and Drug Administration Regulatory Science Center for Food Safety and Applied NutritionCollege ParkMarylandUSA
| | - Eric Déziel
- Centre Armand‐Frappier Santé Biotechnologie, Institut national de la recherche scientifique (INRS)LavalQuébecH7V 1B7Canada
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12
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Storey N, Rabiey M, Neuman BW, Jackson RW, Mulley G. Genomic Characterisation of Mushroom Pathogenic Pseudomonads and Their Interaction with Bacteriophages. Viruses 2020; 12:E1286. [PMID: 33182769 PMCID: PMC7696170 DOI: 10.3390/v12111286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 11/02/2020] [Accepted: 11/05/2020] [Indexed: 01/16/2023] Open
Abstract
Bacterial diseases of the edible white button mushroom Agaricus bisporus caused by Pseudomonas species cause a reduction in crop yield, resulting in considerable economic loss. We examined bacterial pathogens of mushrooms and bacteriophages that target them to understand the disease and opportunities for control. The Pseudomonastolaasii genome encoded a single type III protein secretion system (T3SS), but contained the largest number of non-ribosomal peptide synthase (NRPS) genes, multimodular enzymes that can play a role in pathogenicity, including a putative tolaasin-producing gene cluster, a toxin causing blotch disease symptom. However, Pseudomonasagarici encoded the lowest number of NRPS and three putative T3SS while non-pathogenic Pseudomonas sp. NS1 had intermediate numbers. Potential bacteriophage resistance mechanisms were identified in all three strains, but only P. agarici NCPPB 2472 was observed to have a single Type I-F CRISPR/Cas system predicted to be involved in phage resistance. Three novel bacteriophages, NV1, ϕNV3, and NV6, were isolated from environmental samples. Bacteriophage NV1 and ϕNV3 had a narrow host range for specific mushroom pathogens, whereas phage NV6 was able to infect both mushroom pathogens. ϕNV3 and NV6 genomes were almost identical and differentiated within their T7-like tail fiber protein, indicating this is likely the major host specificity determinant. Our findings provide the foundations for future comparative analyses to study mushroom disease and phage resistance.
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Affiliation(s)
- Nathaniel Storey
- School of Biological Sciences, Whiteknights Campus, University of Reading, Reading RG6 6AJ, UK; (N.S.); (R.W.J.); (G.M.)
| | - Mojgan Rabiey
- School of Biological Sciences, Whiteknights Campus, University of Reading, Reading RG6 6AJ, UK; (N.S.); (R.W.J.); (G.M.)
- School of Biosciences and Birmingham Institute of Forest Research, University of Birmingham, Birmingham B15 2TT, UK
| | - Benjamin W. Neuman
- Biology Department, College of Arts, Sciences and Education, TAMUT, Texarkana, TX 75503, USA;
| | - Robert W. Jackson
- School of Biological Sciences, Whiteknights Campus, University of Reading, Reading RG6 6AJ, UK; (N.S.); (R.W.J.); (G.M.)
- School of Biosciences and Birmingham Institute of Forest Research, University of Birmingham, Birmingham B15 2TT, UK
| | - Geraldine Mulley
- School of Biological Sciences, Whiteknights Campus, University of Reading, Reading RG6 6AJ, UK; (N.S.); (R.W.J.); (G.M.)
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13
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Helper bacteria halt and disarm mushroom pathogens by linearizing structurally diverse cyclolipopeptides. Proc Natl Acad Sci U S A 2020; 117:23802-23806. [PMID: 32868430 PMCID: PMC7519232 DOI: 10.1073/pnas.2006109117] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The bacterial pathogen Pseudomonas tolaasii severely damages white button mushrooms by secretion of the pore-forming toxin tolaasin, the main virulence factor of brown blotch disease. Yet, fungus-associated helper bacteria of the genus Mycetocola (Mycetocola tolaasinivorans and Mycetocola lacteus) may protect their host by an unknown detoxification mechanism. By a combination of metabolic profiling, imaging mass spectrometry, structure elucidation, and bioassays, we found that the helper bacteria inactivate tolaasin by linearizing the lipocyclopeptide. Furthermore, we found that Mycetocola spp. impair the dissemination of the pathogen by cleavage of the lactone ring of pseudodesmin. The role of pseudodesmin as a major swarming factor was corroborated by identification and inactivation of the corresponding biosynthetic gene cluster. Activity-guided fractionation of the Mycetocola proteome, matrix-assisted laser desorption/ionization (MALDI) analyses, and heterologous enzyme production identified the lactonase responsible for toxin cleavage. We revealed an antivirulence strategy in the context of a tripartite interaction that has high ecological and agricultural relevance.
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14
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Oni FE, Geudens N, Onyeka JT, Olorunleke OF, Salami AE, Omoboye OO, Arias AA, Adiobo A, De Neve S, Ongena M, Martins JC, Höfte M. Cyclic lipopeptide-producing Pseudomonas koreensis group strains dominate the cocoyam rhizosphere of a Pythium root rot suppressive soil contrasting with P. putida prominence in conducive soils. Environ Microbiol 2020; 22:5137-5155. [PMID: 32524747 DOI: 10.1111/1462-2920.15127] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/31/2020] [Accepted: 06/08/2020] [Indexed: 11/29/2022]
Abstract
Pseudomonas isolates from tropical environments have been underexplored and may form an untapped reservoir of interesting secondary metabolites. In this study, we compared Pseudomonas and cyclic lipopeptide (CLP) diversity in the rhizosphere of a cocoyam root rot disease (CRRD) suppressive soil in Boteva, Cameroon with those from four conducive soils in Cameroon and Nigeria. Compared with other soils, Boteva andosols were characterized by high silt, organic matter, nitrogen and calcium. Besides, the cocoyam rhizosphere at Boteva was characterized by strains belonging mainly to the P. koreensis and P. putida (sub)groups, with representations in the P. fluorescens, P. chlororaphis, P. jessenii and P. asplenii (sub)groups. In contrast, P. putida isolates were prominent in conducive soils. Regarding CLP diversity, Boteva was characterized by strains producing 11 different CLP types with cocoyamide A producers, belonging to the P. koreensis group, being the most abundant. However, putisolvin III-V producers were the most dominant in the rhizosphere of conducive soils in both Cameroon and Nigeria. Furthermore, we elucidated the chemical structure of putisolvin derivatives-putisolvin III-V, and described its biosynthetic gene cluster. We show that high Pseudomonas and metabolic diversity may be driven by microbial competition, which likely contributes to soil suppressiveness to CRRD.
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Affiliation(s)
- Feyisara Eyiwumi Oni
- Phytopathology Laboratory, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.,Unit for Environmental Sciences and Management, Faculty of Natural and Agricultural Sciences, North-West University, Potchefstroom, South Africa
| | - Niels Geudens
- NMR and Structure Analysis Unit, Department of Organic and Macromolecular Chemistry, Faculty of Science, Ghent University, Ghent, Belgium
| | - Joseph T Onyeka
- Plant Pathology Unit, National Root Crops Research Institute (NRCRI), Umudike, Abia, Nigeria
| | - Oluwatoyin Faith Olorunleke
- Phytopathology Laboratory, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Ayodeji Ekundayo Salami
- Department of Crop, Horticulture and Landscape Design, Faculty of Agricultural Sciences, Ekiti State University (EKSU), Ado-Ekiti, Nigeria
| | - Olumide Owolabi Omoboye
- Phytopathology Laboratory, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Anthony Arguelles Arias
- Microbial Processes and Interactions Unit, Faculty of Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
| | - Amayana Adiobo
- Institute for Agricultural Research for Development (IRAD), Ekona, Cameroon
| | - Stefaan De Neve
- Research Group of Soil Fertility and Nutrient Management, Department of Environment, Ghent University, Ghent, Belgium
| | - Marc Ongena
- Microbial Processes and Interactions Unit, Faculty of Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
| | - José C Martins
- NMR and Structure Analysis Unit, Department of Organic and Macromolecular Chemistry, Faculty of Science, Ghent University, Ghent, Belgium
| | - Monica Höfte
- Phytopathology Laboratory, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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15
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De Vleeschouwer M, Van Kersavond T, Verleysen Y, Sinnaeve D, Coenye T, Martins JC, Madder A. Identification of the Molecular Determinants Involved in Antimicrobial Activity of Pseudodesmin A, a Cyclic Lipopeptide From the Viscosin Group. Front Microbiol 2020; 11:646. [PMID: 32373092 PMCID: PMC7187754 DOI: 10.3389/fmicb.2020.00646] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 03/20/2020] [Indexed: 12/24/2022] Open
Abstract
Cyclic lipo(depsi)peptides (CLiPs) from Pseudomonas constitute a class of natural products involved in a broad range of biological functions for their producers. They also display interesting antimicrobial potential including activity against Gram-positive bacteria. Literature has indicated that these compounds can induce membrane permeabilization, possibly through pore-formation, leading to the general view that the cellular membrane constitutes the primary target in their mode of action. In support of this view, we previously demonstrated that the enantiomer of pseudodesmin A, a member of the viscosin group of CLiPs, shows identical activity against a test panel of six Gram-positive bacterial strains. Here, a previously developed total organic synthesis route is used and partly adapted to generate 20 novel pseudodesmin A analogs in an effort to derive links between molecular constitution, structure and activity. From these, the importance of a macrocycle closed by an ester bond as well as a critical length of β-OH fatty acid chain capping the N-terminus is conclusively demonstrated, providing further evidence for the importance of peptide-membrane interactions in the mode of action. Moreover, an alanine scan is used to unearth the contribution of specific amino acid residues to biological activity. Subsequent interpretation in terms of a structural model describing the location and orientation of pseudodesmin A in a membrane environment, allows first insight in the peptide-membrane interactions involved. The biological screening also identified residue positions that appear less sensitive to conservative modifications, allowing the introduction of a non-perturbing tryptophan residue which will pave the way toward biophysical studies using fluorescence spectroscopy.
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Affiliation(s)
- Matthias De Vleeschouwer
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium.,NMR and Structure Analysis Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Tim Van Kersavond
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium.,NMR and Structure Analysis Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Yentl Verleysen
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium.,NMR and Structure Analysis Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Davy Sinnaeve
- NMR and Structure Analysis Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Tom Coenye
- Laboratory of Pharmaceutical Microbiology, Department of Pharmaceutical Analysis, Ghent University, Ghent, Belgium
| | - José C Martins
- NMR and Structure Analysis Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Annemieke Madder
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
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16
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Götze S, Stallforth P. Structure, properties, and biological functions of nonribosomal lipopeptides from pseudomonads. Nat Prod Rep 2020; 37:29-54. [DOI: 10.1039/c9np00022d] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Bacteria of the genusPseudomonasdisplay a fascinating metabolic diversity. In this review, we focus our attention on the natural product class of nonribosomal lipopeptides, which help pseudomonads to colonize a wide range of ecological niches.
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Affiliation(s)
- Sebastian Götze
- Faculty 7: Natural and Environmental Sciences
- Institute for Environmental Sciences
- University Koblenz Landau
- 76829 Landau
- Germany
| | - Pierre Stallforth
- Junior Research Group Chemistry of Microbial Communication
- Leibniz Institute for Natural Product Research and Infection Biology Hans Knöll Institute (HKI)
- 07745 Jena
- Germany
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17
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Azu Okorley B, Leo Sossah F, Dai D, Xu S, Liu Z, Song B, Sheng H, Fu Y, Li Y. Resistance Sources to Brown Blotch Disease ( Pseudomonas tolaasii) in a Diverse Collection of Pleurotus Mushroom Strains. Pathogens 2019; 8:pathogens8040227. [PMID: 31717568 PMCID: PMC6963638 DOI: 10.3390/pathogens8040227] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/06/2019] [Accepted: 11/07/2019] [Indexed: 11/25/2022] Open
Abstract
Brown blotch disease (BBD) caused by Pseudomonas tolaasii is one of the most devastating diseases of Pleurotus spp. worldwide. Breeding for resistant strains is the most effective method for controlling BBD. To identify resistant germplasm for BBD management, 97 strains comprising 21 P. cf. floridanus, 20 P. ostreatus, and 56 P. pulmonarius were screened by two different methods; namely, inoculation of the pathogen on the mushroom pileus (IMP) and on the spawned substrate (IMSS) under controlled conditions. Out of the 97 strains screened, 22 P. pulmonarius, and four P. cf. floridanus were moderately resistant to BBD using the IMP method. Eleven P. pulmonarius, six P. cf. florida, and one P. ostreatus strains were highly resistant to BBD using the IMSS method. All of the 97 strains showed varying degrees of susceptibility using the IMP method, but eight strains were completely resistant using the IMSS method. Combining these two methods, five strains were highly resistant (four P. pulmonarius and one P. cf. floridanus) and 11 were moderately resistant (eight P. pulmonarius and three P. cf. floridanus). The resistance sources to P. tolaasii identified in P. pulmonarius and P. cf. floridanus could be used for further breeding of Pleurotus spp.
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Affiliation(s)
- Benjamin Azu Okorley
- International Cooperation Research Center of China for New Germplasm and Breeding of Edible Mushrooms, Jilin Agricultural University, Changchun 130118, China
- Department of Plant Pathology, Jilin Agricultural University, Changchun 130118, China
| | - Frederick Leo Sossah
- International Cooperation Research Center of China for New Germplasm and Breeding of Edible Mushrooms, Jilin Agricultural University, Changchun 130118, China
- Department of Plant Pathology, Jilin Agricultural University, Changchun 130118, China
| | - Dan Dai
- International Cooperation Research Center of China for New Germplasm and Breeding of Edible Mushrooms, Jilin Agricultural University, Changchun 130118, China
- Department of Plant Pathology, Jilin Agricultural University, Changchun 130118, China
| | - Shuai Xu
- International Cooperation Research Center of China for New Germplasm and Breeding of Edible Mushrooms, Jilin Agricultural University, Changchun 130118, China
- Department of Plant Pathology, Jilin Agricultural University, Changchun 130118, China
| | - Zhenghui Liu
- International Cooperation Research Center of China for New Germplasm and Breeding of Edible Mushrooms, Jilin Agricultural University, Changchun 130118, China
| | - Bing Song
- International Cooperation Research Center of China for New Germplasm and Breeding of Edible Mushrooms, Jilin Agricultural University, Changchun 130118, China
- Department of Plant Pathology, Jilin Agricultural University, Changchun 130118, China
| | - Hongyan Sheng
- Department of Plant Pathology, Washington State University, Pullman, WA 99164-6430, USA
| | - Yongping Fu
- International Cooperation Research Center of China for New Germplasm and Breeding of Edible Mushrooms, Jilin Agricultural University, Changchun 130118, China
- Department of Plant Pathology, Jilin Agricultural University, Changchun 130118, China
- Correspondence: (Y.F.); (Y.L.)
| | - Yu Li
- International Cooperation Research Center of China for New Germplasm and Breeding of Edible Mushrooms, Jilin Agricultural University, Changchun 130118, China
- Department of Plant Pathology, Jilin Agricultural University, Changchun 130118, China
- Correspondence: (Y.F.); (Y.L.)
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18
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Lin X, Sun DW. Research advances in browning of button mushroom (Agaricus bisporus): Affecting factors and controlling methods. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2019.05.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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19
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Geudens N, Kovács B, Sinnaeve D, Oni FE, Höfte M, Martins JC. Conformation and Dynamics of the Cyclic Lipopeptide Viscosinamide at the Water-Lipid Interface. Molecules 2019; 24:E2257. [PMID: 31213011 PMCID: PMC6630293 DOI: 10.3390/molecules24122257] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 06/11/2019] [Accepted: 06/13/2019] [Indexed: 12/19/2022] Open
Abstract
Cyclic lipodepsipeptides or CLiPs from Pseudomonas are secondary metabolites that mediate a wide range of biological functions for their producers, and display antimicrobial and anticancer activities. Direct interaction of CLiPs with the cellular membranes is presumed to be essential in causing these. To understand the processes involved at the molecular level, knowledge of the conformation and dynamics of CLiPs at the water-lipid interface is required to guide the interpretation of biophysical investigations in model membrane systems. We used NMR and molecular dynamics to study the conformation, location and orientation of the Pseudomonas CLiP viscosinamide in a water/dodecylphosphocholine solution. In the process, we demonstrate the strong added value of combining uniform, isotope-enriched viscosinamide and protein NMR methods. In particular, the use of techniques to determine backbone dihedral angles and detect and identify long-lived hydrogen bonds, establishes that the solution conformation previously determined in acetonitrile is maintained in water/dodecylphosphocholine solution. Paramagnetic relaxation enhancements pinpoint viscosinamide near the water-lipid interface, with its orientation dictated by the amphipathic distribution of hydrophobic and hydrophilic residues. Finally, the experimental observations are supported by molecular dynamics simulations. Thus a firm structural basis is now available for interpreting biophysical and bioactivity data relating to this class of compounds.
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Affiliation(s)
- Niels Geudens
- NMR and Structural Analysis Unit, Department of Organic and Macromolecular Chemistry, GhentUniversity, Campus Sterre, S4, Krijgslaan 281, B-9000 Gent, Belgium.
| | - Benjámin Kovács
- NMR and Structural Analysis Unit, Department of Organic and Macromolecular Chemistry, GhentUniversity, Campus Sterre, S4, Krijgslaan 281, B-9000 Gent, Belgium.
| | - Davy Sinnaeve
- NMR and Structural Analysis Unit, Department of Organic and Macromolecular Chemistry, GhentUniversity, Campus Sterre, S4, Krijgslaan 281, B-9000 Gent, Belgium.
| | - Feyisara Eyiwumi Oni
- Laboratory of Phytopathology, Department of Plants and Crops, Ghent University, Coupure Links 653, B-9000 Gent, Belgium.
| | - Monica Höfte
- Laboratory of Phytopathology, Department of Plants and Crops, Ghent University, Coupure Links 653, B-9000 Gent, Belgium.
| | - José C Martins
- NMR and Structural Analysis Unit, Department of Organic and Macromolecular Chemistry, GhentUniversity, Campus Sterre, S4, Krijgslaan 281, B-9000 Gent, Belgium.
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20
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Jahanshah G, Yan Q, Gerhardt H, Pataj Z, Lämmerhofer M, Pianet I, Josten M, Sahl HG, Silby MW, Loper JE, Gross H. Discovery of the Cyclic Lipopeptide Gacamide A by Genome Mining and Repair of the Defective GacA Regulator in Pseudomonas fluorescens Pf0-1. JOURNAL OF NATURAL PRODUCTS 2019; 82:301-308. [PMID: 30666877 DOI: 10.1021/acs.jnatprod.8b00747] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Genome mining of the Gram-negative bacterium Pseudomonas fluorescens Pf0-1 showed that the strain possesses a silent NRPS-based biosynthetic gene cluster encoding a new lipopeptide; its activation required the repair of the global regulator system. In this paper, we describe the genomics-driven discovery and characterization of the associated secondary metabolite gacamide A, a lipodepsipeptide that forms a new family of Pseudomonas lipopeptides. The compound has a moderate, narrow-spectrum antibiotic activity and facilitates bacterial surface motility.
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Affiliation(s)
- Gahzaleh Jahanshah
- Pharmaceutical Institute, Department of Pharmaceutical Biology , University of Tübingen , 72076 Tübingen , Germany
- German Centre for Infection Research (DZIF) , partner site Tübingen , 72076 Tübingen , Germany
| | - Qing Yan
- Department of Botany and Plant Pathology , Oregon State University , Corvallis , Oregon 97331 , United States
| | - Heike Gerhardt
- Pharmaceutical Institute, Department of Pharmaceutical Analysis and Bioanalysis , University of Tübingen , 72076 Tübingen , Germany
- UMR 5060, IRAMAT-CRP2A, Esplanade des Antilles , F-33600 Pessac , France
| | - Zoltán Pataj
- Pharmaceutical Institute, Department of Pharmaceutical Analysis and Bioanalysis , University of Tübingen , 72076 Tübingen , Germany
- UMR 5060, IRAMAT-CRP2A, Esplanade des Antilles , F-33600 Pessac , France
| | - Michael Lämmerhofer
- Pharmaceutical Institute, Department of Pharmaceutical Analysis and Bioanalysis , University of Tübingen , 72076 Tübingen , Germany
- UMR 5060, IRAMAT-CRP2A, Esplanade des Antilles , F-33600 Pessac , France
| | - Isabelle Pianet
- CESAMO-ISM, UMR 5255, CNRS , Université Bordeaux I , 351 Cours de la Libération , F-33405 Talence , France
| | - Michaele Josten
- Institute for Medical Microbiology, Immunology and Parasitology (IMMIP), Pharmaceutical Microbiology Unit , University of Bonn , 53115 Bonn , Germany
- German Centre for Infection Research (DZIF) , partner site Bonn-Cologne , 53115 Bonn , Germany
| | - Hans-Georg Sahl
- Institute for Medical Microbiology, Immunology and Parasitology (IMMIP), Pharmaceutical Microbiology Unit , University of Bonn , 53115 Bonn , Germany
- German Centre for Infection Research (DZIF) , partner site Bonn-Cologne , 53115 Bonn , Germany
| | - Mark W Silby
- Department of Biology , University of Massachusetts Dartmouth , North Dartmouth , Massachusetts 02747 , United States
| | - Joyce E Loper
- Department of Botany and Plant Pathology , Oregon State University , Corvallis , Oregon 97331 , United States
- Agricultural Research Service , U.S. Department of Agriculture , Corvallis , Oregon 97331 , United States
| | - Harald Gross
- Pharmaceutical Institute, Department of Pharmaceutical Biology , University of Tübingen , 72076 Tübingen , Germany
- German Centre for Infection Research (DZIF) , partner site Tübingen , 72076 Tübingen , Germany
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21
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Geudens N, Martins JC. Cyclic Lipodepsipeptides From Pseudomonas spp. - Biological Swiss-Army Knives. Front Microbiol 2018; 9:1867. [PMID: 30158910 PMCID: PMC6104475 DOI: 10.3389/fmicb.2018.01867] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 07/25/2018] [Indexed: 12/20/2022] Open
Abstract
Cyclic lipodepsipeptides produced by Pseudomonas spp. (Ps-CLPs) are biosurfactants that constitute a diverse class of versatile bioactive natural compounds with promising application potential. While chemically diverse, they obey a common structural blue-print, allowing the definition of 14 distinct groups with multiple structurally homologous members. In addition to antibacterial and antifungal properties the reported activity profile of Ps-CLPs includes their effect on bacterial motility, biofilm formation, induced defense responses in plants, their insecticidal activity and anti-proliferation effects on human cancer cell-lines. To further validate their status of potential bioactive substances, we assessed the results of 775 biological tests on 51 Ps-CLPs available from literature. From this, a fragmented view emerges. Taken as a group, Ps-CLPs present a broad activity profile. However, reports on individual Ps-CLPs are often much more limited in the scope of organisms that are challenged or activities that are explored. As a result, our analysis shows that the available data is currently too sparse to allow biological function to be correlated to a particular group of Ps-CLPs. Consequently, certain generalizations that appear in literature with respect to the biological activities of Ps-CLPs should be nuanced. This notwithstanding, the data for the two most extensively studied Ps-CLPs does indicate they can display activities against various biological targets. As the discovery of novel Ps-CLPs accelerates, current challenges to complete and maintain a useful overview of biological activity are discussed.
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Affiliation(s)
- Niels Geudens
- NMR and Structure Analysis Unit, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - José C Martins
- NMR and Structure Analysis Unit, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
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22
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de Frias UA, Pereira GKB, Guazzaroni ME, Silva-Rocha R. Boosting Secondary Metabolite Production and Discovery through the Engineering of Novel Microbial Biosensors. BIOMED RESEARCH INTERNATIONAL 2018; 2018:7021826. [PMID: 30079350 PMCID: PMC6069586 DOI: 10.1155/2018/7021826] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 02/11/2018] [Indexed: 01/05/2023]
Abstract
Bacteria are a source of a large number of secondary metabolites with several biomedical and biotechnological applications. In recent years, there has been tremendous progress in the development of novel synthetic biology approaches both to increase the production rate of secondary metabolites of interest in native producers and to mine and reconstruct novel biosynthetic gene clusters in heterologous hosts. Here, we present the recent advances toward the engineering of novel microbial biosensors to detect the synthesis of secondary metabolites in bacteria and in the development of synthetic promoters and expression systems aiming at the construction of microbial cell factories for the production of these compounds. We place special focus on the potential of Gram-negative bacteria as a source of biosynthetic gene clusters and hosts for pathway assembly, on the construction and characterization of novel promoters for native hosts, and on the use of computer-aided design of novel pathways and expression systems for secondary metabolite production. Finally, we discuss some of the potentials and limitations of the approaches that are currently being developed and we highlight new directions that could be addressed in the field.
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Affiliation(s)
| | | | - María-Eugenia Guazzaroni
- Faculty of Philosophy, Science and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Rafael Silva-Rocha
- Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
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23
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Shahid I, Malik KA, Mehnaz S. A decade of understanding secondary metabolism in Pseudomonas spp. for sustainable agriculture and pharmaceutical applications. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/s42398-018-0006-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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24
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Masschelein J, Jenner M, Challis GL. Antibiotics from Gram-negative bacteria: a comprehensive overview and selected biosynthetic highlights. Nat Prod Rep 2017. [PMID: 28650032 DOI: 10.1039/c7np00010c] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Covering: up to 2017The overwhelming majority of antibiotics in clinical use originate from Gram-positive Actinobacteria. In recent years, however, Gram-negative bacteria have become increasingly recognised as a rich yet underexplored source of novel antimicrobials, with the potential to combat the looming health threat posed by antibiotic resistance. In this article, we have compiled a comprehensive list of natural products with antimicrobial activity from Gram-negative bacteria, including information on their biosynthetic origin(s) and molecular target(s), where known. We also provide a detailed discussion of several unusual pathways for antibiotic biosynthesis in Gram-negative bacteria, serving to highlight the exceptional biocatalytic repertoire of this group of microorganisms.
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Affiliation(s)
- J Masschelein
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, UK.
| | - M Jenner
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, UK.
| | - G L Challis
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, UK.
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25
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Geudens N, Nasir MN, Crowet JM, Raaijmakers JM, Fehér K, Coenye T, Martins JC, Lins L, Sinnaeve D, Deleu M. Membrane Interactions of Natural Cyclic Lipodepsipeptides of the Viscosin Group. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:331-339. [DOI: 10.1016/j.bbamem.2016.12.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 12/12/2016] [Accepted: 12/16/2016] [Indexed: 11/16/2022]
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26
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De Vleeschouwer M, Sinnaeve D, Matthijs N, Coenye T, Madder A, Martins JC. Synthesis of N-Methylated Pseudodesmin A Analogues: on the Structural Importance of N-H Hydrogen Bonds. ChemistrySelect 2017. [DOI: 10.1002/slct.201601791] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Matthias De Vleeschouwer
- Organic and Biomimetic Chemistry Research Group; Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 9000 Ghent Belgium
- NMR and structure analysis unit; Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 9000 Ghent Belgium
| | - Davy Sinnaeve
- NMR and structure analysis unit; Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 9000 Ghent Belgium
| | - Nele Matthijs
- Laboratory of Pharmaceutical Microbiology; Ghent University; Ottergemsesteenweg 460 9000 Ghent
| | - Tom Coenye
- Laboratory of Pharmaceutical Microbiology; Ghent University; Ottergemsesteenweg 460 9000 Ghent
| | - Annemieke Madder
- Organic and Biomimetic Chemistry Research Group; Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 9000 Ghent Belgium
| | - José C. Martins
- NMR and structure analysis unit; Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 9000 Ghent Belgium
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27
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De Vleeschouwer M, Martins JC, Madder A. First total synthesis of WLIP: on the importance of correct protecting group choice. J Pept Sci 2016; 22:149-55. [PMID: 26856688 DOI: 10.1002/psc.2852] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 12/08/2015] [Accepted: 12/14/2015] [Indexed: 02/06/2023]
Abstract
Cyclic lipodepsipeptides (CLPs) are a group of metabolites produced by Pseudomonas bacteria, involved in various biological functions and displaying a wide range of properties, including antibacterial and antifungal activities. The white line-inducing principle (WLIP) is a member of the viscosin group featuring a Glu2 amino acid. Recently, a total synthesis of pseudodesmin A - the Gln2 counterpart of WLIP - was described, and we here expand this route to Glu2 containing CLPs. We report the first total synthesis of WLIP and at the same time establish that the Gln2 to Glu2 substitution has an adverse impact on the crude purity and overall yield. A comparative study of different CLP analogues reveals the importance of the nature of the Glx2 protecting group in determining these outcomes. Replacement of the conventional tBu protecting group by the larger benzyl group for the Glu residue in our synthesis strategy indeed resulted in an improved conversion. Next to achieving the first WLIP total synthesis, we thus show the importance of a careful choice of protecting groups for the success of this type of solid-phase synthesis approaches towards CLPs.
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Affiliation(s)
- Matthias De Vleeschouwer
- Department of Organic and Macromolecular Chemistry, Organic and Biomimetic Chemistry Research Group, Ghent University, Krijgslaan 281 S4, 9000, Ghent, Belgium.,Department of Organic and Macromolecular Chemistry, NMR and Structure Analysis Unit, Ghent University, Krijgslaan 281 S4, 9000, Ghent, Belgium
| | - José C Martins
- Department of Organic and Macromolecular Chemistry, NMR and Structure Analysis Unit, Ghent University, Krijgslaan 281 S4, 9000, Ghent, Belgium
| | - Annemieke Madder
- Department of Organic and Macromolecular Chemistry, Organic and Biomimetic Chemistry Research Group, Ghent University, Krijgslaan 281 S4, 9000, Ghent, Belgium
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28
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Elshafie HS, Racioppi R, Bufo SA, Camele I. In vitro study of biological activity of four strains of Burkholderia gladioli pv. agaricicola and identification of their bioactive metabolites using GC-MS. Saudi J Biol Sci 2016; 24:295-301. [PMID: 28149165 PMCID: PMC5272957 DOI: 10.1016/j.sjbs.2016.04.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 03/31/2016] [Accepted: 04/24/2016] [Indexed: 11/08/2022] Open
Abstract
This research was carried out to study in vitro antibacterial activity of 4 strains of Burkholderia gladioli pv. agaricicola (Bga) against G+ve Bacillus megaterium and G−ve Escherichia coli, haemolytic activity against the cell membrane of erythrocytes, the production of extracellular hydrolytic enzymes and finally, the pathogenicity against Agaricus bisporus flesh blocks. Chemical structure of bioactive substances of the most bioactive strain (ICMP 11096) was established using gas chromatography–mass spectrometry (GC–MS). All the studied Bga strains inhibited the growth of the two tested bacteria although some growing substrates negatively influenced the antimicrobial substance production. The same Bga strains showed highly haemolytic activity and were able to produce 3 hydrolytic enzymes, i.e. chitinase, glucanase and protease. In pathogenicity assays, the considered Bga strains resulted virulent for A. bisporus. The GC–MS for compounds from Bga ICMP 11096 were compatible with the structure of two bioactive fatty acids identified as methyl stearate and ethanol 2-butoxy phosphate with mass spectrum m/e 298 and 398, respectively.
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Affiliation(s)
- Hazem S Elshafie
- School of Agricultural, Forestry, Food and Environmental Sciences, University of Basilicata, Viale Ateneo Lucano, 85100 Potenza, Italy
| | - Rocco Racioppi
- Department of Science, University of Basilicata, Viale dell'Ateneo Lucano, 85100 Potenza, Italy
| | - Sabino A Bufo
- Department of Science, University of Basilicata, Viale dell'Ateneo Lucano, 85100 Potenza, Italy
| | - Ippolito Camele
- School of Agricultural, Forestry, Food and Environmental Sciences, University of Basilicata, Viale Ateneo Lucano, 85100 Potenza, Italy
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29
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Lo Cantore P, Giorgio A, Iacobellis NS. Bioactivity of volatile organic compounds produced by Pseudomonas tolaasii. Front Microbiol 2015; 6:1082. [PMID: 26500627 PMCID: PMC4594034 DOI: 10.3389/fmicb.2015.01082] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 09/22/2015] [Indexed: 01/16/2023] Open
Abstract
Pseudomonas tolaasii is the main bacterial pathogen of several mushroom species. In this paper we report that strains of P. tolaasii produce volatile substances inducing in vitro mycelia growth inhibition of Pleurotus ostreatus and P. eryngii, and Agaricus bisporus and P. ostreatus basidiome tissue blocks brown discoloration. P. tolaasii strains produced the volatile ammonia but not hydrogen cyanide. Among the volatiles detected by GC-MS, methanethiol, dimethyl disulfide (DMDS), and 1-undecene were identified. The latter, when assayed individually as pure compounds, led to similar effects noticed when P. tolaasii volatiles natural blend was used on mushrooms mycelia and basidiome tissue blocks. Furthermore, the natural volatile mixture resulted toxic toward lettuce and broccoli seedling growth. In contrast, pure volatiles showed different activity according to their nature and/or doses applied. Indeed, methanethiol resulted toxic at all the doses used, while DMDS toxicity was assessed till a quantity of 1.25 μg, below which it caused, together with 1-undecene (≥10 μg), broccoli growth increase.
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Affiliation(s)
- Pietro Lo Cantore
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata Potenza, Italy
| | - Annalisa Giorgio
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata Potenza, Italy
| | - Nicola S Iacobellis
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata Potenza, Italy
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Giorgio A, De Stradis A, Lo Cantore P, Iacobellis NS. Biocide effects of volatile organic compounds produced by potential biocontrol rhizobacteria on Sclerotinia sclerotiorum. Front Microbiol 2015; 6:1056. [PMID: 26500617 PMCID: PMC4594563 DOI: 10.3389/fmicb.2015.01056] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 09/14/2015] [Indexed: 01/21/2023] Open
Abstract
Six rhizobacteria isolated from common bean and able to protect bean plants from the common bacterial blight (CBB) causal agent, were in vitro evaluated for their potential antifungal effects toward different plant pathogenic fungi, mostly soil-borne. By dual culture assays, the above bacteria resulted producing diffusible and volatile metabolites which inhibited the growth of the majority of the pathogens under study. In particular, the latter substances highly affected the mycelium growth of Sclerotinia sclerotiorum strains, one of which was selected for further studies either on mycelium or sclerotia. Gas chromatographic analysis of the bacterial volatiles led to the identification of an array of volatile organic compounds (VOCs). Time course studies showed the modification of the VOCs profile along a period of 5 days. In order to evaluate the single detected VOC effects on fungal growth, some of the pure compounds were tested on S. sclerotiorum mycelium and their minimal inhibitory quantities were determined. Similarly, the minimal inhibitory quantities on sclerotia germination were also defined. Moreover, observations by light and transmission electron microscopes highlighted hyphae cytoplasm granulation and ultrastructural alterations at cell organelles, mostly membranes, mitochondria, and endoplasmic reticulum. The membranes appeared one of the primary targets of bacterial volatiles, as confirmed by hemolytic activity observed for the majority of pure VOCs. However, of interest is the alteration observed on mitochondria as well.
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Affiliation(s)
- Annalisa Giorgio
- Scuola di Scienze Agrarie, Forestali, Alimentari ed Ambientali, Università degli Studi della Basilicata Potenza, Italy
| | - Angelo De Stradis
- Istituto per la Protezione Sostenibile delle Piante, Consiglio Nazionale delle Ricerche Bari, Italy
| | - Pietro Lo Cantore
- Scuola di Scienze Agrarie, Forestali, Alimentari ed Ambientali, Università degli Studi della Basilicata Potenza, Italy
| | - Nicola S Iacobellis
- Scuola di Scienze Agrarie, Forestali, Alimentari ed Ambientali, Università degli Studi della Basilicata Potenza, Italy
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31
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Geudens N, De Vleeschouwer M, Fehér K, Rokni-Zadeh H, Ghequire MGK, Madder A, De Mot R, Martins JC, Sinnaeve D. Impact of a stereocentre inversion in cyclic lipodepsipeptides from the viscosin group: a comparative study of the viscosinamide and pseudodesmin conformation and self-assembly. Chembiochem 2014; 15:2736-46. [PMID: 25382202 DOI: 10.1002/cbic.201402389] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Indexed: 01/21/2023]
Abstract
The viscosin group covers a series of cyclic lipodepsipeptides (CLPs) produced by Pseudomonas bacteria, with a range of biological functions and antimicrobial activities. Their oligopeptide moieties are composed of both L- and D-amino acids. Remarkably, the Leu5 amino acid-centrally located in the nonapeptide sequence-is the sole residue found to possess either an L or D configuration, depending on the producing strain. The impact of this D/L switch on the solution conformation was investigated by NMR-restrained molecular modelling of the epimers pseudodesmin A and viscosinamide A. Although the backbone fold remained unaffected, the D/L switch adjusted the segregation between hydrophobic and hydrophilic residues, and thus the amphipathicity. It also influenced the self-assembly capacity in organic solvents. Additionally, several new minor variants of viscosinamide A from Pseudomonas fluorescens DR54 were identified, and an NMR assay is proposed to assess the presence of either an L- or D-Leu5.
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Affiliation(s)
- Niels Geudens
- NMR and Structure Analysis Unit, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Ghent (Belgium)
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Henkels MD, Kidarsa TA, Shaffer BT, Goebel NC, Burlinson P, Mavrodi DV, Bentley MA, Rangel LI, Davis EW, Thomashow LS, Zabriskie TM, Preston GM, Loper JE. Pseudomonas protegens Pf-5 causes discoloration and pitting of mushroom caps due to the production of antifungal metabolites. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2014; 27:733-746. [PMID: 24742073 DOI: 10.1094/mpmi-10-13-0311-r] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Bacteria in the diverse Pseudomonas fluorescens group include rhizosphere inhabitants known for their antifungal metabolite production and biological control of plant disease, such as Pseudomonas protegens Pf-5, and mushroom pathogens, such as Pseudomonas tolaasii. Here, we report that strain Pf-5 causes brown, sunken lesions on peeled caps of the button mushroom (Agaricus bisporus) that resemble brown blotch symptoms caused by P. tolaasii. Strain Pf-5 produces six known antifungal metabolites under the control of the GacS/GacA signal transduction system. A gacA mutant produces none of these metabolites and did not cause lesions on mushroom caps. Mutants deficient in the biosynthesis of the antifungal metabolites 2,4-diacetylphloroglucinol and pyoluteorin caused less-severe symptoms than wild-type Pf-5 on peeled mushroom caps, whereas mutants deficient in the production of lipopeptide orfamide A caused similar symptoms to wild-type Pf-5. Purified pyoluteorin and 2,4-diacetylphloroglucinol mimicked the symptoms caused by Pf-5. Both compounds were isolated from mushroom tissue inoculated with Pf-5, providing direct evidence for their in situ production by the bacterium. Although the lipopeptide tolaasin is responsible for brown blotch of mushroom caused by P. tolaasii, P. protegens Pf-5 caused brown blotch-like symptoms on peeled mushroom caps through a lipopeptide-independent mechanism involving the production of 2,4-diacetylphloroglucinol and pyoluteorin.
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33
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Reybroeck W, De Vleeschouwer M, Marchand S, Sinnaeve D, Heylen K, De Block J, Madder A, Martins JC, Heyndrickx M. Cyclic lipodepsipeptides produced by Pseudomonas spp. naturally present in raw milk induce inhibitory effects on microbiological inhibitor assays for antibiotic residue screening. PLoS One 2014; 9:e98266. [PMID: 24853676 PMCID: PMC4031126 DOI: 10.1371/journal.pone.0098266] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 04/30/2014] [Indexed: 11/23/2022] Open
Abstract
Two Pseudomonas strains, identified as closely related to Pseudomonas tolaasii, were isolated from milk of a farm with frequent false-positive Delvotest results for screening putative antibiotic residues in raw milk executed as part of the regulatory quality programme. Growth at 5 to 7°C of these isolates in milk resulted in high lipolysis and the production of bacterial inhibitors. The two main bacterial inhibitors have a molecular weight of 1168.7 and 1140.7 Da respectively, are heat-tolerant and inhibit Geobacillus stearothermophilus var. calidolactis, the test strain of most of the commercially available microbiological inhibitor tests for screening of antibiotic residues in milk. Furthermore, these bacterial inhibitors show antimicrobial activity against Staphylococcus aureus, Bacillus cereus and B. subtilis and also interfere negatively with yoghurt production. Following their isolation and purification with RP-HPLC, the inhibitors were identified by NMR analysis as cyclic lipodepsipeptides of the viscosin group. Our findings bring to light a new challenge for quality control in the dairy industry. By prolonging the refrigerated storage of raw milk, the keeping quality of milk is influenced by growth and metabolic activities of psychrotrophic bacteria such as pseudomonads. Besides an increased risk of possible spoilage of long shelf-life milk, the production at low temperature of natural bacterial inhibitors may also result in false-positive results for antibiotic residue screening tests based on microbial inhibitor assays thus leading to undue production loss.
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Affiliation(s)
- Wim Reybroeck
- Institute for Agricultural and Fisheries Research (ILVO), Technology and Food Science Unit, Melle, Belgium
| | - Matthias De Vleeschouwer
- Ghent University (UGent), Department of Organic Chemistry, NMR and Structure Analysis Unit, Gent, Belgium
- Ghent University (UGent), Department of Organic Chemistry, Organic and Biomimetic Chemistry Research Unit, Gent, Belgium
| | - Sophie Marchand
- Institute for Agricultural and Fisheries Research (ILVO), Technology and Food Science Unit, Melle, Belgium
| | - Davy Sinnaeve
- Ghent University (UGent), Department of Organic Chemistry, NMR and Structure Analysis Unit, Gent, Belgium
| | - Kim Heylen
- Ghent University (UGent), Department of Biochemistry and Microbiology, Laboratory of Microbiology, Gent, Belgium
| | - Jan De Block
- Institute for Agricultural and Fisheries Research (ILVO), Technology and Food Science Unit, Melle, Belgium
| | - Annemieke Madder
- Ghent University (UGent), Department of Organic Chemistry, Organic and Biomimetic Chemistry Research Unit, Gent, Belgium
| | - José C. Martins
- Ghent University (UGent), Department of Organic Chemistry, NMR and Structure Analysis Unit, Gent, Belgium
| | - Marc Heyndrickx
- Institute for Agricultural and Fisheries Research (ILVO), Technology and Food Science Unit, Melle, Belgium
- Ghent University (UGent), Department of Pathology, Bacteriology and Poultry Diseases, Merelbeke, Belgium
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34
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De Vleeschouwer M, Sinnaeve D, Van den Begin J, Coenye T, Martins JC, Madder A. Rapid Total Synthesis of Cyclic Lipodepsipeptides as a Premise to Investigate their Self‐Assembly and Biological Activity. Chemistry 2014; 20:7766-75. [DOI: 10.1002/chem.201402066] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Indexed: 12/16/2022]
Affiliation(s)
- Matthias De Vleeschouwer
- Department of Organic Chemistry, Organic and Biomimetic Chemistry Research Group, Ghent University, Krijgslaan 281 S4, 9000 Ghent (Belgium)
- Department of Organic Chemistry, NMR and Structure Analysis Unit, Ghent University, Krijgslaan 281 S4, 9000 Ghent (Belgium)
| | - Davy Sinnaeve
- Department of Organic Chemistry, NMR and Structure Analysis Unit, Ghent University, Krijgslaan 281 S4, 9000 Ghent (Belgium)
| | - Jos Van den Begin
- Department of Organic Chemistry, Organic and Biomimetic Chemistry Research Group, Ghent University, Krijgslaan 281 S4, 9000 Ghent (Belgium)
| | - Tom Coenye
- Laboratory of Pharmaceutical Microbiology, Ghent University, Harelbekestraat 72, 9000 Ghent (Belgium)
| | - José C. Martins
- Department of Organic Chemistry, NMR and Structure Analysis Unit, Ghent University, Krijgslaan 281 S4, 9000 Ghent (Belgium)
| | - Annemieke Madder
- Department of Organic Chemistry, Organic and Biomimetic Chemistry Research Group, Ghent University, Krijgslaan 281 S4, 9000 Ghent (Belgium)
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35
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D'aes J, Kieu NP, Léclère V, Tokarski C, Olorunleke FE, De Maeyer K, Jacques P, Höfte M, Ongena M. To settle or to move? The interplay between two classes of cyclic lipopeptides in the biocontrol strain Pseudomonas CMR12a. Environ Microbiol 2014; 16:2282-300. [PMID: 24673852 DOI: 10.1111/1462-2920.12462] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2013] [Revised: 02/14/2014] [Accepted: 02/15/2014] [Indexed: 12/15/2022]
Abstract
Pseudomonas CMR12a is a biocontrol strain that produces phenazine antibiotics and as yet uncharacterized cyclic lipopeptides (CLPs). The CLPs of CMR12a were studied by chemical structure analysis and in silico analysis of the gene clusters encoding the non-ribosomal peptide synthetases responsible for CLP biosynthesis. CMR12a produces two different classes of CLPs: orfamides B, D and E, whereby the latter two represent new derivatives of the orfamide family, and sessilins A-C. The orfamides are made up of a 10 amino acid peptide coupled to a β-hydroxydodecanoyl or β-hydroxytetradecanoyl fatty acid moiety, and are related to orfamides produced by biocontrol strain Pseudomonas protegens Pf-5. The sessilins consist of an 18-amino acid peptide linked to a β-hydroxyoctanoyl fatty acid and differ in one amino acid from tolaasins, toxins produced by the mushroom pathogen Pseudomonas tolaasii. CLP biosynthesis mutants were constructed and tested for biofilm formation and swarming motility. Orfamides appeared indispensable for swarming while sessilin mutants showed reduced biofilm formation, but enhanced swarming motility. The interplay between the two classes of CLPs fine tunes these processes. The presence of sessilins in wild type CMR12a interferes with swarming by hampering the release of orfamides and by co-precipitating orfamides to form a white line in agar.
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Affiliation(s)
- Jolien D'aes
- Laboratory of Phytopathology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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36
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Meng J, Fan Y, Su M, Chen C, Ren T, Wang J, Zhao Q. WLIP derived from Lasiosphaera fenzlii Reich exhibits anti-tumor activity and induces cell cycle arrest through PPAR-γ associated pathways. Int Immunopharmacol 2014; 19:37-44. [PMID: 24401848 DOI: 10.1016/j.intimp.2013.12.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Revised: 12/15/2013] [Accepted: 12/24/2013] [Indexed: 11/17/2022]
Abstract
White-line-inducing principle (WLIP), a lipodepsipeptide isolated from Lasiosphaera fenzlii Reich., which is one of the puffballs, for the first time, has been reported to exhibit anti-microbial activity. However, there are no reports regarding the anti-tumor effects of WLIP. In this study, we reported the anti-cancer effects of WLIP on K562 cells, and its potential effect on the PPAR-γ activation pathway. The obtained results showed that WLIP exerted strong anti-proliferative effect on K562 cells. Moreover, WLIP was found to increase apoptosis and induce G0/Gl arrest. Modeling results from the Surflex-Dock program suggested that PPAR-γ might be the potential anti-tumor target of WLIP, which was confirmed by the experiments that WLIP increased the activity in luciferase reporter assay and the expression of PPAR-γ in Western blot. Besides, WLIP was able to down-regulate the expression of Bcl-xL, Cyclin-D1 in K562 cells. In summary, our novel observations suggested that WLIP might have a potential implication in cancer prevention and treatment, and also showed for the first time that the anti-tumor effect of WLIP might be mediated through modulation of the PPAR-γ activation pathway.
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Affiliation(s)
- Jingjing Meng
- Department of Pharmacy, General Hospital of Shenyang Military Area Command, Shenyang 110840, China; School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Yanhua Fan
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Mingzhi Su
- Department of Pharmacy, General Hospital of Shenyang Military Area Command, Shenyang 110840, China
| | - Congqin Chen
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Tianshu Ren
- Department of Pharmacy, General Hospital of Shenyang Military Area Command, Shenyang 110840, China
| | - Jinhui Wang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Qingchun Zhao
- Department of Pharmacy, General Hospital of Shenyang Military Area Command, Shenyang 110840, China.
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Scherlach K, Graupner K, Hertweck C. Molecular Bacteria-Fungi Interactions: Effects on Environment, Food, and Medicine. Annu Rev Microbiol 2013; 67:375-97. [DOI: 10.1146/annurev-micro-092412-155702] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kirstin Scherlach
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, 07745 Jena, Germany;
| | - Katharina Graupner
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, 07745 Jena, Germany;
| | - Christian Hertweck
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, 07745 Jena, Germany;
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38
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Zhang F, Huang YH, Liu SZ, Zhang L, Li BT, Zhao XX, Fu Y, Liu JJ, Zhang XX. Pseudomonas reactans, a bacterial strain isolated from the intestinal flora of Blattella germanica with anti-Beauveria bassiana activity. ENVIRONMENTAL ENTOMOLOGY 2013; 42:453-9. [PMID: 23726054 DOI: 10.1603/en12347] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Anti-Beauveria bassiana activity of aqueous fecal extracts from conventional German cockroaches [Blattella germanica (L.)] was detected, but was not detected in samples from germ-free German cockroaches. Subsequently, bacterial strain BGI-14 was isolated from the gut of conventional German cockroaches and was identified as Pseudomonas reactans based on 16S rDNA sequence. The strain BGI-14 not only inhibited the germination of conidia, but also inhibited the growth of B. bassiana hyphae. Further studies demonstrated that B. bassiana infections in German cockroaches orally treated with the extracts of BGI-14 fermentation were significantly weakened. Compared with the control group, the cumulative mortality rate of treatment group was reduced by 10.3% at 20 d postinoculation. These studies imply that intestinal flora with anti-B. bassiana activity might contribute to resistance of infection by entomopathogenic fungi.
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Affiliation(s)
- Fan Zhang
- Key Laboratory of Animal Resistance Research, College of Life Science, Shandong Normal University, 88 East Wenhua Rd., Jinan 250014, PR China
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39
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Li W, Rokni-Zadeh H, De Vleeschouwer M, Ghequire MGK, Sinnaeve D, Xie GL, Rozenski J, Madder A, Martins JC, De Mot R. The antimicrobial compound xantholysin defines a new group of Pseudomonas cyclic lipopeptides. PLoS One 2013; 8:e62946. [PMID: 23690965 PMCID: PMC3656897 DOI: 10.1371/journal.pone.0062946] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Accepted: 03/27/2013] [Indexed: 12/17/2022] Open
Abstract
The rhizosphere isolate Pseudomonas putida BW11M1 produces a mixture of cyclic lipopeptide congeners, designated xantholysins. Properties of the major compound xantholysin A, shared with several other Pseudomonas lipopeptides, include antifungal activity and toxicity to Gram-positive bacteria, a supportive role in biofilm formation, and facilitation of surface colonization through swarming. Atypical is the lipopeptide’s capacity to inhibit some Gram-negative bacteria, including several xanthomonads. The lipotetradecadepsipeptides are assembled by XtlA, XtlB and XtlC, three co-linearly operating non-ribosomal peptide synthetases (NRPSs) displaying similarity in modular architecture with the entolysin-producing enzymes of the entomopathogenic Pseudomonas entomophila L48. A shifted serine-incorporating unit in the eight-module enzyme XtlB elongating the central peptide moiety not only generates an amino acid sequence differing at several equivalent positions from entolysin, but also directs xantholysin’s macrocyclization into an octacyclic structure, distinct from the pentacyclic closure in entolysin. Relaxed fatty acid specificity during lipoinitiation by XtlA (acylation with 3-hydroxydodec-5-enoate instead of 3-hydroxydecanoate) and for incorporation of the ultimate amino acid by XtlC (valine instead of isoleucine) account for the production of the minor structural variants xantholysin C and B, respectively. Remarkably, the genetic backbones of the xantholysin and entolysin NRPS systems also bear pronounced phylogenetic similarity to those of the P. putida strains PCL1445 and RW10S2, albeit generating the seemingly structurally unrelated cyclic lipopeptides putisolvin (undecapeptide containing a cyclotetrapeptide) and WLIP (nonapeptide containing a cycloheptapeptide), respectively. This similarity includes the linked genes encoding the cognate LuxR-family regulator and tripartite export system components in addition to individual modules of the NRPS enzymes, and probably reflects a common evolutionary origin. Phylogenetic scrutiny of the modules used for selective amino acid activation by these synthetases indicates that bacteria such as pseudomonads recruit and reshuffle individual biosynthetic units and blocks thereof to engineer reorganized or novel NRPS assembly lines for diversified synthesis of lipopeptides.
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Affiliation(s)
- Wen Li
- Centre of Microbial and Plant Genetics, Department of Microbial and Molecular Systems, University of Leuven, Heverlee-Leuven, Belgium
| | - Hassan Rokni-Zadeh
- Centre of Microbial and Plant Genetics, Department of Microbial and Molecular Systems, University of Leuven, Heverlee-Leuven, Belgium
| | - Matthias De Vleeschouwer
- NMR and Structure Analysis Unit, Department of Organic Chemistry, Ghent University, Gent, Belgium
- Organic and Biomimetic Chemistry Research Group, Department of Organic Chemistry, Ghent University, Gent, Belgium
| | - Maarten G. K. Ghequire
- Centre of Microbial and Plant Genetics, Department of Microbial and Molecular Systems, University of Leuven, Heverlee-Leuven, Belgium
| | - Davy Sinnaeve
- NMR and Structure Analysis Unit, Department of Organic Chemistry, Ghent University, Gent, Belgium
| | - Guan-Lin Xie
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Jef Rozenski
- Laboratory of Medicinal Chemistry, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Annemieke Madder
- Organic and Biomimetic Chemistry Research Group, Department of Organic Chemistry, Ghent University, Gent, Belgium
| | - José C. Martins
- NMR and Structure Analysis Unit, Department of Organic Chemistry, Ghent University, Gent, Belgium
| | - René De Mot
- Centre of Microbial and Plant Genetics, Department of Microbial and Molecular Systems, University of Leuven, Heverlee-Leuven, Belgium
- * E-mail:
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Rokni-Zadeh H, Li W, Yilma E, Sanchez-Rodriguez A, De Mot R. Distinct lipopeptide production systems for WLIP (white line-inducing principle) in Pseudomonas fluorescens and Pseudomonas putida. ENVIRONMENTAL MICROBIOLOGY REPORTS 2013; 5:160-9. [PMID: 23757145 DOI: 10.1111/1758-2229.12015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 10/29/2012] [Accepted: 11/02/2012] [Indexed: 05/11/2023]
Abstract
The interaction of WLIP (white line-inducing principle), a member of the viscosin group of Pseudomonas lipopeptides, with tolaasin, a lipopeptide mycotoxin secreted by Pseudomonas tolaasii, enables identification of the mushroom pathogen relying on formation of a lipopeptide coprecipitate between confronted colonies of an indicator strain (designated Pseudomonas 'reactans') and P. tolaasii. The WLIP non-ribosomal lipopeptide synthesis system of the mushroom isolate P. 'reactans' LMG 5329 (Wip) was identified and shown to be most similar to the Pseudomonas fluorescens SBW25 viscosin system (Visc), but remarkably different from the WLIP-generating Wlp system previously identified in the rice rhizosphere isolate Pseudomonas putida RW10S2. The Wlp machinery is composed of modules most similar to those recruited for biosynthesis of the non-viscosin-type lipopeptides putisolvin and entolysin by strains from the P. putida clade. In line with the pronounced synteny between the wip and visc flanking regions, strain LMG 5329 was identified as an authentic P. fluorescens closely related to strain SBW25. In both P. putida and P. fluorescens, WLIP production confers similar phenotypes of microbial antagonism and surface colonization. Genotypes other than wlp or wip were not identified among WLIP producers isolated from mushroom, maize rhizosphere or water.
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Affiliation(s)
- Hassan Rokni-Zadeh
- Centre of Microbial and Plant Genetics, KU Leuven, Kasteelpark Arenberg 20, B-3001 Heverlee-Leuven, Belgium
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Abou-Zeid MA. Pathogenic variation in isolates of Pseudomonas causing the brown blotch of cultivated mushroom, Agaricus bisporus. Braz J Microbiol 2012; 43:1137-46. [PMID: 24031938 PMCID: PMC3768897 DOI: 10.1590/s1517-838220120003000041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2010] [Indexed: 11/21/2022] Open
Abstract
Twenty seven bacterial isolates were isolated from superficial brown discolorations on the caps of cultivated Agaricus bisporus. After White Line Assay (WLA) and the assist of Biolog computer-identification system, isolates were divided into groups: (I) comprised ninteen bacterial isolates that positively responded to a Pseudomonas “reactans” reference strain (NCPPB1311) in WLA and were identified as Pseudomonas tolaasii, (II) comprised two isolates which were WLA+ towards the reference strain (JCM21583) of P. tolaasii and were proposed to be P. “reactans”. The third group comprised six isolates, two of which weakly responded to the strain of P. tolaasii and were identified as P. gingeri whereas the other four were WLA-and identified as P. fluorescens (three isolates) and P. marginalis (one isolate). Isolates of P. tolaasii showed high aggressiveness compared with those of P. “reactans” in pathogenicity tests. Cubes of 1 cm3 of A. bisporus turned brown and decreased in size when were inoculated with 10 µl of P. tolaasii suspension containing 108 CFU ml-1, whereas a similar concentration of P. “reactans” caused only light browning. Fifty µl of the same concentration of P. tolaasii isolates gave typical brown blotch symptoms on fresh mushroom sporophores whereas the two P. “reactans” isolates caused superficial light discoloration only after inoculation with 100 µl of the same concentration. Mixture from both bacterial suspensions increased the brown areas formed on the pileus. This is the first pathogenicity report of P. tolasii and P. “reactans” isolated from cultivated A. bisporus in Egypt.
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Affiliation(s)
- Mohamed A Abou-Zeid
- Microbiology Department, Faculty of Science, Ain Shams University , Coimbatore , India
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Genetic and functional characterization of cyclic lipopeptide white-line-inducing principle (WLIP) production by rice rhizosphere isolate Pseudomonas putida RW10S2. Appl Environ Microbiol 2012; 78:4826-34. [PMID: 22544260 DOI: 10.1128/aem.00335-12] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The secondary metabolite mediating the GacS-dependent growth-inhibitory effect exerted by the rice rhizosphere isolate Pseudomonas putida RW10S2 on phytopathogenic Xanthomonas species was identified as white-line-inducing principle (WLIP), a member of the viscosin group of cyclic lipononadepsipeptides. WLIP producers are commonly referred to by the taxonomically invalid name "Pseudomonas reactans," based on their capacity to reveal the presence of a nearby colony of Pseudomonas tolaasii by inducing the formation of a visible precipitate ("white line") in agar medium between both colonies. This phenomenon is attributed to the interaction of WLIP with a cyclic lipopeptide of a distinct structural group, the fungitoxic tolaasin, and has found application as a diagnostic tool to identify tolaasin-producing bacteria pathogenic to mushrooms. The genes encoding the WLIP nonribosomal peptide synthetases WlpA, WlpB, and WlpC were identified in two separate genomic clusters (wlpR-wlpA and wlpBC) with an operon organization similar to that of the viscosin, massetolide, and entolysin biosynthetic systems. Expression of wlpR is dependent on gacS, and the encoded regulator of the LuxR family (WlpR) activates transcription of the biosynthetic genes and the linked export genes, which is not controlled by the RW10S2 quorum-sensing system PmrR/PmrI. In addition to linking the known phenotypes of white line production and hemolytic activity of a WLIP producer with WLIP biosynthesis, additional properties of ecological relevance conferred by WLIP production were identified, namely, antagonism against Xanthomonas and involvement in swarming and biofilm formation.
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Raaijmakers JM, De Bruijn I, Nybroe O, Ongena M. Natural functions of lipopeptides fromBacillusandPseudomonas: more than surfactants and antibiotics. FEMS Microbiol Rev 2010; 34:1037-62. [DOI: 10.1111/j.1574-6976.2010.00221.x] [Citation(s) in RCA: 719] [Impact Index Per Article: 51.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Cho KH, Wang HS, Kim YK. Temperature-dependent hemolytic activity of membrane pore-forming peptide toxin, tolaasin. J Pept Sci 2010; 16:85-90. [PMID: 19960443 DOI: 10.1002/psc.1199] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Tolaasin, a pore-forming peptide toxin produced by Pseudomonas tolaasii, causes brown blotch disease on cultivated mushrooms. Hemolysis using red blood cells was measured to evaluate the cytotoxicity of tolaasin. To investigate the mechanism of tolaasin-induced cell disruption, we studied the effect of temperature on the hemolytic process. At 4 degrees Celsius, poor binding of the tolaasin molecules to the erythrocyte membrane was observed and most of the tolaasin molecules stayed in the solution. However, once tolaasin bound to erythrocytes at 37 degrees Celsius and the temperature was decreased, complete hemolysis was observed even at 4 degrees Celsius. These results indicate that tolaasin binding to cell membrane is temperature-sensitive while tolaasin-induced membrane disruption is less sensitive to temperature change. The effect of erythrocyte concentration was measured to understand the membrane binding and pore-forming properties of tolaasin. The percentage of hemolysis measured by both hemoglobin release and cell lysis decreased as erythrocyte concentration increased in the presence of a fixed amount of tolaasin. The result shows that hemolysis is dependent on the amount of tolaasin and multiple binding of tolaasin is required for the hemolysis of a single cell. In analysis of dose-dependence, the hemolysis was proportional to the tenth power of the amount of tolaasin, implying that tolaasin-induced hemolysis can be explained by a multi-hit model.
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Affiliation(s)
- Kwang-Hyun Cho
- Department of Agricultural Chemistry, Chungbuk National University, Cheongju, Chungbuk, 361-763, Korea
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Sinnaeve D, Hendrickx PMS, Van Hemel J, Peys E, Kieffer B, Martins JC. The solution structure and self-association properties of the cyclic lipodepsipeptide pseudodesmin A support its pore-forming potential. Chemistry 2010; 15:12653-62. [PMID: 19839018 DOI: 10.1002/chem.200901885] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Pseudodesmin A is a cyclic lipodepsipeptide (CLP) of the viscosin group with a moderate in vitro biological activity. For several CLPs, including members of this group, this activity has been related to the ability to form ion pores in cellular membranes. As their size does not allow individual CLPs to span the membrane bilayer, individual monomers must somehow assemble into a larger structure. NMR spectroscopy has been used to demonstrate that in chloroform and other apolar organic solvents, pseudodesmin A monomers assemble into a supramolecular structure. These self-assembled structures can become sufficiently large to span the membrane bilayer as demonstrated with translational diffusion NMR spectroscopic measurements. With the aim to obtain more insight into the structural nature of this assembly, the solution conformation of pseudodesmin A was first determined by using ROESY (rOe) restraints measured in acetonitrile, in which no self-association occurs. The structure, which is found to be mostly similar to the previously described crystal structure, is shown to be retained within the supramolecular complex. Intermolecular rOe contacts obtained in chloroform together with chemical shift perturbation data provides structural insight into the organization of the self-associated complex. Based upon this analysis, a model for the organization of pseudodesmin A monomers in the supramolecular assembly is proposed, which is in agreement with the formation of bilayer spanning hydrophilic pores and provides the basis for a structure-function relationship for this type of CLPs. Finally, it is demonstrated that the differences previously reported between the crystal and solution conformation of the white line inducing principle (WLIP), a close analogue of pseudodesmin A, are the result of the use of dimethyl sulfoxide as solvent, whose strong hydrogen-bonding capacity induces conformational exchange.
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Affiliation(s)
- Davy Sinnaeve
- NMR and Structure Analysis Unit, Department of Organic Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Gent, lgium.
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Largeteau ML, Savoie JM. Microbially induced diseases of Agaricus bisporus: biochemical mechanisms and impact on commercial mushroom production. Appl Microbiol Biotechnol 2010; 86:63-73. [PMID: 20127233 DOI: 10.1007/s00253-010-2445-2] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Revised: 01/06/2010] [Accepted: 01/06/2010] [Indexed: 11/24/2022]
Abstract
The button mushroom, Agaricus bisporus (Lange) Imbach, the most common cultivated mushroom, is susceptible to a wide range of virus, bacterial, and fungal diseases. However, only some diseases were studied for the mechanisms involved in the host-microorganism interaction. This review deals with biochemical mechanisms related to cavity disease (Burkholderia gladioli) and to the interaction between A. bisporus and the causal agents responsible for the most severe diseases, namely the bacteria Pseudomonas tolaasii and Pseudomonas reactans and the fungi Trichoderma aggressivum and Lecanicillium fungicola.
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Affiliation(s)
- Michèle L Largeteau
- INRA, UR1264, Mycologie et Sécurité des Aliments, BP81, 33883 Villenave d'Ornon Cedex, France.
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Cellular responses of the late blight pathogen Phytophthora infestans to cyclic lipopeptide surfactants and their dependence on G proteins. Appl Environ Microbiol 2009; 75:4950-7. [PMID: 19502443 DOI: 10.1128/aem.00241-09] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Oomycete pathogens cause major yield losses for many crop plants, and their control depends heavily on agrochemicals. Cyclic lipopeptides (CLPs) were recently discovered as a new class of natural compounds with strong activities against oomycetes. The CLP massetolide A (Mass A), produced by Pseudomonas fluorescens, has zoosporicidal activity, induces systemic resistance, and reduces late blight in tomato. To gain further insight into the modes of action of CLPs, the effects of Mass A on pore formation, mycelial growth, sporangium formation, and zoospore behavior were investigated, as was the involvement of G proteins in the sensitivity of Phytophthora infestans to Mass A. The results showed that Mass A induced the formation of transmembrane pores with an estimated size of between 1.2 and 1.8 nm. Dose-response experiments revealed that zoospores were the most sensitive to Mass A, followed by mycelium and cysts. Mass A significantly reduced sporangium formation and caused increased branching and swelling of hyphae. At relatively low concentrations, Mass A induced encystment of zoospores. It had no effect on the chemotactic response of zoospores but did adversely affect zoospore autoaggregation. A loss-of-function transformant of P. infestans lacking the G-protein alpha subunit was more sensitive to Mass A, whereas a gain-of-function transformant required a higher Mass A concentration to interfere with zoospore aggregation. Results indicate that Mass A disturbs various developmental stages in the life cycle of P. infestans and suggest that the cellular responses of P. infestans to this CLP are, in part, dependent on G-protein signaling.
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48
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Sinnaeve D, Michaux C, Van hemel J, Vandenkerckhove J, Peys E, Borremans FA, Sas B, Wouters J, Martins JC. Structure and X-ray conformation of pseudodesmins A and B, two new cyclic lipodepsipeptides from Pseudomonas bacteria. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.03.045] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tarkka MT, Sarniguet A, Frey-Klett P. Inter-kingdom encounters: recent advances in molecular bacterium-fungus interactions. Curr Genet 2009; 55:233-43. [PMID: 19337734 DOI: 10.1007/s00294-009-0241-2] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Revised: 03/04/2009] [Accepted: 03/16/2009] [Indexed: 01/20/2023]
Abstract
Interactions between bacteria and fungi are well known, but it is often underestimated how intimate and decisive such associations can be with respect to behaviour and survival of each participating organism. In this article we review recent advances in molecular bacterium-fungus interactions, combining the data of different model systems. Emphasis is given to the positive or negative consequences these interactions have on the microbe accommodating plants and animals. Intricate mechanisms of antagonism and tolerance have emerged, being as important for the biological control of plants against fungal diseases as for the human body against fungal infections. Bacterial growth promoters of fungal mycelium have been characterized, and these may as well assist plant-fungus mutualism as disease development in animals. Some of the toxins that have been previously associated with fungi are actually produced by endobacteria, and the mechanisms that lie behind the maintenance of such exquisite endosymbioses are fascinating. Bacteria do cause diseases in fungi, and a synergistic action between bacterial toxins and extracellular enzymes is the hallmark of such diseases. The molecular study of bacterium-fungus associations has expanded our view on microbial communication, and this promising field shows now great potentials in medicinal, agricultural and biotechnological applications.
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Affiliation(s)
- Mika T Tarkka
- UFZ, Department of Soil Ecology, Helmholtz Centre for Environmental Research, Halle, Germany.
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50
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Kobayashi DY, Crouch JA. Bacterial/Fungal interactions: from pathogens to mutualistic endosymbionts. ANNUAL REVIEW OF PHYTOPATHOLOGY 2009; 47:63-82. [PMID: 19400650 DOI: 10.1146/annurev-phyto-080508-081729] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
A fundamental issue in biology is the question of how bacteria initiate and maintain pathogenic relationships with eukaryotic hosts. Despite billions of years of coexistence, far less is known about bacterial/fungal interactions than the equivalent associations formed by either of these types of microorganisms with higher eukaryotes. This review highlights recent research advances in the field of bacterial/fungal interactions, and provides examples of the various forms such interactions may assume, ranging from simple antagonism and parasitism to more intimate associations of pathogenesis and endosymbiosis. Information derived from the associations of bacteria and fungi in the context of natural and agronomic ecosystems is emphasized, including interactions observed from biological control systems, endosymbiotic relationships, diseases of cultivated mushrooms, and model systems that expand our understanding of human disease. The benefits of studying these systems at the molecular level are also emphasized.
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Affiliation(s)
- Donald Y Kobayashi
- Department of Plant Biology & Pathology, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901-8520, USA.
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