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Shen J, Qiao L. Proteomic and metabolic analysis of Moorella thermoacetica-g-C 3N 4 nanocomposite system for artificial photosynthesis. Talanta 2024; 278:126479. [PMID: 38941811 DOI: 10.1016/j.talanta.2024.126479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 06/18/2024] [Accepted: 06/24/2024] [Indexed: 06/30/2024]
Abstract
Artificial photosynthesis by microbe-semiconductor biohybrid systems has been demonstrated as a valuable strategy in providing sustainable energy and in carbon fixation. However, most of the developed biohybrid systems for light harvesting employ heavy metal materials, especially cadmium sulfide (CdS), which normally cause environmental pollution and restrict the widespread of the systems. Herein, we constructed an environmentally friendly biohybirid system based on a typical acetogenic bacteria, Moorella thermoacetica, coupling with a carbon-based semiconductor, graphitic carbon nitride (g-C3N4), to realize light-driven carbon fixation. The proposed biohybrid system displayed outstanding acetate productivity with a quantum yield of 2.66 ± 0.43 %. Non-targeted proteomic analysis indicated that the physiological activity of the bacteria was improved, coupling with the non-toxic material. We further proposed the mechanisms of energy generation, electron transfer and CO2 fixation of the irradiated biohybrid system by proteomic and metabolomic characterization. With the photoelectron generated in g-C3N4 under illumination, CO2 is finally converted to acetate via the Wood-Ljungdahl pathway (WLP). Other associated pathways were also proved to be activated, providing extra energy or substrates for acetate production. The study reveals that the future focus of the development of biohybrid systems for light harvesting can be on the metal-free biocompatible material, which can activate the expression of the key enzymes involved in the electron transfer and carbon metabolism under light irradiation.
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Affiliation(s)
- Jiayuan Shen
- Department of Chemistry, and Minhang Hospital, Fudan University, Shanghai, 200000, China
| | - Liang Qiao
- Department of Chemistry, and Minhang Hospital, Fudan University, Shanghai, 200000, China.
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2
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Paletti Rovey MF, Sotelo JP, Carezzano ME, Huallpa C, Oliva MDLM. Hexanic extract of Achyrocline satureioides: antimicrobial activity and in vitro inhibitory effect on mechanisms related to the pathogenicity of Paenibacillus larvae. Vet Res Commun 2023; 47:1379-1391. [PMID: 36809600 DOI: 10.1007/s11259-023-10086-1] [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: 12/22/2022] [Accepted: 02/15/2023] [Indexed: 02/23/2023]
Abstract
INTRODUCTION Paenibacillus larvae is a spore-forming bacillus, the most important bacterial pathogen of honeybee larvae and the causative agent of American foulbrood (AFB). Control measures are limited and represent a challenge for both beekeepers and researchers. For this reason, many studies focus on the search for alternative treatments based on natural products. AIM The objective of this study was to determine the antimicrobial activity of the hexanic extract (HE) of Achyrocline satureioides on P. larvae and the inhibitory activity on some mechanisms related to pathogenicity. MATERIAL AND METHODS The Minimum Inhibitory Concentration (MIC) of the HE was determined by the broth microdilution technique and the Minimum Bactericidal Concentration (MBC) by the microdrop technique. Swimming and swarming motility was evaluated in plates with 0.3 and 0.5% agar, respectively. Biofilm formation was evaluated and quantified by the Congo red and crystal violet method. The protease activity was evaluated by the qualitative technique on skim milk agar plates. RESULTS It was determined that the MIC of the HE on four strains of P. larvae ranged between 0.3 and 9.37 µg/ml and the MBC between 1.17 and 150 µg/ml. On the other hand, sub-inhibitory concentrations of the HE were able to decrease swimming motility, biofilm formation and the proteases production of P. larvae.
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Affiliation(s)
- María Fernanda Paletti Rovey
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas, Fisico-Químicas y Naturales, Instituto de Biotecnología Ambiental y Salud (INBIAS), Universidad Nacional de Río Cuarto, Ruta Nacional 36 - Km. 601, X5804BYA, Río Cuarto, Córdoba, Argentina.
- CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), 2290, C1425FQB CABA, Godoy Cruz, Buenos Aires, Argentina.
| | - Jesica Paola Sotelo
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas, Fisico-Químicas y Naturales, Instituto de Biotecnología Ambiental y Salud (INBIAS), Universidad Nacional de Río Cuarto, Ruta Nacional 36 - Km. 601, X5804BYA, Río Cuarto, Córdoba, Argentina
- CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), 2290, C1425FQB CABA, Godoy Cruz, Buenos Aires, Argentina
| | - María Evangelina Carezzano
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas, Fisico-Químicas y Naturales, Instituto de Biotecnología Ambiental y Salud (INBIAS), Universidad Nacional de Río Cuarto, Ruta Nacional 36 - Km. 601, X5804BYA, Río Cuarto, Córdoba, Argentina
- CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), 2290, C1425FQB CABA, Godoy Cruz, Buenos Aires, Argentina
| | - Carlos Huallpa
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas, Fisico-Químicas y Naturales, Instituto de Biotecnología Ambiental y Salud (INBIAS), Universidad Nacional de Río Cuarto, Ruta Nacional 36 - Km. 601, X5804BYA, Río Cuarto, Córdoba, Argentina
- CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), 2290, C1425FQB CABA, Godoy Cruz, Buenos Aires, Argentina
| | - María de Las Mercedes Oliva
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas, Fisico-Químicas y Naturales, Instituto de Biotecnología Ambiental y Salud (INBIAS), Universidad Nacional de Río Cuarto, Ruta Nacional 36 - Km. 601, X5804BYA, Río Cuarto, Córdoba, Argentina
- CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), 2290, C1425FQB CABA, Godoy Cruz, Buenos Aires, Argentina
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3
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Stefanović C, Hager-Mair FF, Breslmayr E, López-Guzmán A, Lim C, Blaukopf M, Kosma P, Oostenbrink C, Ludwig R, Schäffer C. Molecular modelling and site-directed mutagenesis provide insight into saccharide pyruvylation by the Paenibacillus alvei CsaB enzyme. Sci Rep 2023; 13:13394. [PMID: 37591902 PMCID: PMC10435577 DOI: 10.1038/s41598-023-40072-1] [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: 02/26/2023] [Accepted: 08/03/2023] [Indexed: 08/19/2023] Open
Abstract
Pyruvylation is a biologically versatile but mechanistically unexplored saccharide modification. 4,6-Ketal pyruvylated N-acetylmannosamine within bacterial secondary cell wall polymers serves as a cell wall anchoring epitope for proteins possessing a terminal S-layer homology domain trimer. The pyruvyltransferase CsaB from Paenibacillus alvei served as a model to investigate the structural basis of the pyruvyltransfer reaction by a combination of molecular modelling and site-directed mutagenesis together with an enzyme assay using phosphoenolpyruvate (PEP; donor) and synthetic β-D-ManNAc-(1 → 4)-α-D-GlcNAc-diphosphoryl-11-phenoxyundecyl (acceptor). CsaB protein structure modelling was done using Phyre2 and I-Tasser based on the partial crystal structure of the Schizosaccharomyces pombe pyruvyltransferase Pvg1p and by AlphaFold. The models informed the construction of twelve CsaB mutants targeted at plausible PEP and acceptor binding sites and KM and kcat values were determined to evaluate the mutants, indicating the importance of a loop region for catalysis. R148, H308 and K328 were found to be critical to PEP binding and insight into acceptor binding was obtained from an analysis of Y14 and F16 mutants, confirming the modelled binding sites and interactions predicted using Molecular Operating Environment. These data lay the basis for future mechanistic studies of saccharide pyruvylation as a novel target for interference with bacterial cell wall assembly.
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Affiliation(s)
- Cordula Stefanović
- NanoGlycobiology Research Group, Department of Chemistry, Institute of Biochemistry, Universität für Bodenkultur Wien, Muthgasse 18, 1190, Vienna, Austria
- Department of Bionanosciences, Institute of Biologically Inspired Materials, Universität für Bodenkultur Wien, Muthgasse 11, 1190, Vienna, Austria
| | - Fiona F Hager-Mair
- NanoGlycobiology Research Group, Department of Chemistry, Institute of Biochemistry, Universität für Bodenkultur Wien, Muthgasse 18, 1190, Vienna, Austria
- Department of Bionanosciences, Institute of Biologically Inspired Materials, Universität für Bodenkultur Wien, Muthgasse 11, 1190, Vienna, Austria
| | - Erik Breslmayr
- Department of Food Science and Technology, Biocatalysis and Biosensing Laboratory, Universität für Bodenkultur Wien, Muthgasse 11, 1190, Vienna, Austria
- Department of Material Sciences and Process Engineering, Institute for Molecular Modelling and Simulation, Universität für Bodenkultur Wien, Muthgasse 18, 1190, Vienna, Austria
| | - Arturo López-Guzmán
- NanoGlycobiology Research Group, Department of Chemistry, Institute of Biochemistry, Universität für Bodenkultur Wien, Muthgasse 18, 1190, Vienna, Austria
- Department of Bionanosciences, Institute of Biologically Inspired Materials, Universität für Bodenkultur Wien, Muthgasse 11, 1190, Vienna, Austria
- Covirabio GmbH, Brehmstrasse 14a, 1110, Vienna, Austria
| | - Charlie Lim
- Department of Chemistry, Institute of Organic Chemistry, Universität für Bodenkultur Wien, Muthgasse 18, 1190, Vienna, Austria
| | - Markus Blaukopf
- Department of Chemistry, Institute of Organic Chemistry, Universität für Bodenkultur Wien, Muthgasse 18, 1190, Vienna, Austria
| | - Paul Kosma
- Department of Chemistry, Institute of Organic Chemistry, Universität für Bodenkultur Wien, Muthgasse 18, 1190, Vienna, Austria
| | - Chris Oostenbrink
- Department of Material Sciences and Process Engineering, Institute for Molecular Modelling and Simulation, Universität für Bodenkultur Wien, Muthgasse 18, 1190, Vienna, Austria
| | - Roland Ludwig
- Department of Food Science and Technology, Biocatalysis and Biosensing Laboratory, Universität für Bodenkultur Wien, Muthgasse 11, 1190, Vienna, Austria
| | - Christina Schäffer
- NanoGlycobiology Research Group, Department of Chemistry, Institute of Biochemistry, Universität für Bodenkultur Wien, Muthgasse 18, 1190, Vienna, Austria.
- Department of Bionanosciences, Institute of Biologically Inspired Materials, Universität für Bodenkultur Wien, Muthgasse 11, 1190, Vienna, Austria.
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Maurya A, Kumar R, Yadav P, Singh A, Yadav A, Chowdhary P, Raj A. Biofilm formation and extracellular polymeric substance (EPS) production by Bacillus haynesii and influence of hexavalent chromium. BIORESOURCE TECHNOLOGY 2022; 352:127109. [PMID: 35378281 DOI: 10.1016/j.biortech.2022.127109] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 06/14/2023]
Abstract
Biofilm-forming bacteria play a key role in the removal of heavy metals including hexavalent chromium [Cr(VI)] from contaminated sites. In this study, biofilm-forming B. haynesii was examined for extracellular polymeric substances (EPS) production and hexavalent chromium [Cr(VI)] reduction potential. Exposure of B. haynesii with Cr(VI) (12.5-100 mg L-1) for 48 h enhanced pellicle dry weight (20-24%), cell-size (5.1-23.2%) and cell granularity (8.5-19.2%). Also, EPS production was increased by 10-35% by promoting the synthesis of protein (94-119%) and polysaccharide (2-33%) components in EPS. Further, the reduction (27.7 %) and distribution (15.87%) of Cr(VI) were mainly mediated by EPS than the other cellular fractions. Findings of the study suggest that the EPS from B. haynesii was efficiently reduced to Cr(VI) present in aqueous medium and the potential of the organism can be further explored for the mitigation of Cr(VI) contamination.
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Affiliation(s)
- Annapurna Maurya
- Environmental Microbiology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Rajesh Kumar
- Environmental Microbiology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Pooja Yadav
- Environmental Microbiology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India
| | - Anjali Singh
- Environmental Microbiology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India
| | - Ashutosh Yadav
- Environmental Microbiology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India
| | - Pankaj Chowdhary
- Environmental Microbiology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India
| | - Abhay Raj
- Environmental Microbiology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India.
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5
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Romeu MJ, Domínguez-Pérez D, Almeida D, Morais J, Araújo MJ, Osório H, Campos A, Vasconcelos V, Mergulhão FJ. Quantitative proteomic analysis of marine biofilms formed by filamentous cyanobacterium. ENVIRONMENTAL RESEARCH 2021; 201:111566. [PMID: 34181917 DOI: 10.1016/j.envres.2021.111566] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 06/14/2021] [Accepted: 06/18/2021] [Indexed: 06/13/2023]
Abstract
Cyanobacterial molecular biology can identify pathways that affect the adhesion and settlement of biofouling organisms and, consequently, obtain novel antifouling strategies for marine applications. Proteomic analyses can provide an essential understanding of how cyanobacteria adapt to different environmental settings. However, only a few qualitative studies have been performed in some cyanobacterial strains. Considering the limited knowledge about protein expression in cyanobacteria in different growing conditions, a quantitative proteomic analysis by LC-MS/MS of biofilm cells from a filamentous strain was performed. Biofilms were also analysed through standard methodologies for following cyanobacterial biofilm development. Biofilms were formed on glass and perspex at two relevant hydrodynamic conditions for marine environments (average shear rates of 4 s-1 and 40 s-1). Biofilm development was higher at 4 s-1 and no significant differences were found between surfaces. Proteomic analysis identified 546 proteins and 41 were differentially expressed. Differences in protein expression were more noticeable between biofilms formed on glass and perspex at 4 s-1. When comparing biofilms formed on different surfaces, results suggest that biofilm development may be related to the expression of several proteins like a beta-propeller domain-containing protein, chaperone DnaK, SLH domain-containing proteins, an OMF family outer membrane protein, and/or additional uncharacterized proteins. Regarding the hydrodynamic effect, biofilm development can be related to SOD enzyme expression, to proteins related to photosynthetic processes and to a set of uncharacterized proteins with calcium binding domains, disordered proteins, and others involved in electron transfer activity. Studies that combine distinct approaches are essential for finding new targets for antibiofilm agents. The characterisation performed in this work provides new insights into how shear rate and surface affect cyanobacterial biofilm development and how cyanobacteria adapt to these different environmental settings from a macroscopic standpoint to a proteomics context.
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Affiliation(s)
- M J Romeu
- LEPABE, Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - D Domínguez-Pérez
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal
| | - D Almeida
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal
| | - J Morais
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal
| | - M J Araújo
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal
| | - H Osório
- i3S -Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135, Porto, Portugal; Institute of Molecular Pathology and Immunology of the University of Porto, IPATIMUP, Rua Júlio Amaral de Carvalho 45, 4200-135, Porto, Portugal; Faculty of Medicine, University of Porto, Al. Prof. Hernâni Monteiro, 4200-319, Porto, Portugal
| | - A Campos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal
| | - V Vasconcelos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal
| | - F J Mergulhão
- LEPABE, Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
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6
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Simunović V. Genomic and molecular evidence reveals novel pathways associated with cell surface polysaccharides in bacteria. FEMS Microbiol Ecol 2021; 97:6355432. [PMID: 34415013 DOI: 10.1093/femsec/fiab119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 08/18/2021] [Indexed: 11/13/2022] Open
Abstract
Amino acid (acyl carrier protein) ligases (AALs) are a relatively new family of bacterial amino acid adenylating enzymes with unknown function(s). Here, genomic enzymology tools that employ sequence similarity networks and genome context analyses were used to hypothesize the metabolic function(s) of AALs. In over 50% of species, aal and its cognate acyl carrier protein (acp) genes, along with three more genes, formed a highly conserved AAL cassette. AAL cassettes were strongly associated with surface polysaccharide gene clusters in Proteobacteria and Actinobacteria, yet were prevalent among soil and rhizosphere-associated α- and β-Proteobacteria, including symbiotic α- and β-rhizobia and some Mycolata. Based on these associations, AAL cassettes were proposed to encode a noncanonical Acp-dependent polysaccharide modification route. Genomic-inferred predictions were substantiated by published experimental evidence, revealing a role for AAL cassettes in biosynthesis of biofilm-forming exopolysaccharide in pathogenic Burkholderia and expression of aal and acp genes in nitrogen-fixing Rhizobium bacteroids. Aal and acp genes were associated with dltBD-like homologs that modify cell wall teichoic acids with d-alanine, including in Paenibacillus and certain other bacteria. Characterization of pathways that involve AAL and Acp may lead to developing new plant and human disease-controlling agents as well as strains with improved nitrogen fixation capacity.
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Ravi J, Fioravanti A. S-layers: The Proteinaceous Multifunctional Armors of Gram-Positive Pathogens. Front Microbiol 2021; 12:663468. [PMID: 33889148 PMCID: PMC8056022 DOI: 10.3389/fmicb.2021.663468] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 03/08/2021] [Indexed: 01/01/2023] Open
Abstract
S-layers are self-assembled crystalline 2D lattices enclosing the cell envelopes of several bacteria and archaea. Despite their abundance, the landscape of S-layer structure and function remains a land of wonder. By virtue of their location, bacterial S-layers have been hypothesized to add structural stability to the cell envelope. In addition, S-layers are implicated in mediating cell-environment and cell-host interactions playing a key role in adhesion, cell growth, and division. Significant strides in the understanding of these bacterial cell envelope components were made possible by recent studies that have provided structural and functional insights on the critical S-layer and S-layer-associated proteins (SLPs and SLAPs), highlighting their roles in pathogenicity and their potential as therapeutic or vaccine targets. In this mini-review, we revisit the sequence-structure-function relationships of S-layers, SLPs, and SLAPs in Gram-positive pathogens, focusing on the best-studied classes, Bacilli (Bacillus anthracis) and Clostridia (Clostridioides difficile). We delineate the domains and their architectures in archetypal S-layer proteins across Gram-positive genera and reconcile them with experimental findings. Similarly, we highlight a few key "flavors" of SLPs displayed by Gram-positive pathogens to assemble and support the bacterial S-layers. Together, these findings indicate that S-layers are excellent candidates for translational research (developing diagnostics, antibacterial therapeutics, and vaccines) since they display the three crucial characteristics: accessible location at the cell surface, abundance, and unique lineage-specific signatures.
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Affiliation(s)
- Janani Ravi
- Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, MI, United States
| | - Antonella Fioravanti
- Structural and Molecular Microbiology, VIB-VUB Center for Structural Biology, Brussels, Belgium
- Structural Biology Brussels, Vrije Universiteit Brussel, Brussels, Belgium
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8
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Muszewska A, Okrasińska A, Steczkiewicz K, Drgas O, Orłowska M, Perlińska-Lenart U, Aleksandrzak-Piekarczyk T, Szatraj K, Zielenkiewicz U, Piłsyk S, Malc E, Mieczkowski P, Kruszewska JS, Bernat P, Pawłowska J. Metabolic Potential, Ecology and Presence of Associated Bacteria Is Reflected in Genomic Diversity of Mucoromycotina. Front Microbiol 2021; 12:636986. [PMID: 33679672 PMCID: PMC7928374 DOI: 10.3389/fmicb.2021.636986] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 01/25/2021] [Indexed: 11/13/2022] Open
Abstract
Mucoromycotina are often considered mainly in pathogenic context but their biology remains understudied. We describe the genomes of six Mucoromycotina fungi representing distant saprotrophic lineages within the subphylum (i.e., Umbelopsidales and Mucorales). We selected two Umbelopsis isolates from soil (i.e., U. isabellina, U. vinacea), two soil-derived Mucor isolates (i.e., M. circinatus, M. plumbeus), and two Mucorales representatives with extended proteolytic activity (i.e., Thamnidium elegans and Mucor saturninus). We complement computational genome annotation with experimental characteristics of their digestive capabilities, cell wall carbohydrate composition, and extensive total lipid profiles. These traits inferred from genome composition, e.g., in terms of identified encoded enzymes, are in accordance with experimental results. Finally, we link the presence of associated bacteria with observed characteristics. Thamnidium elegans genome harbors an additional, complete genome of an associated bacterium classified to Paenibacillus sp. This fungus displays multiple altered traits compared to the remaining isolates, regardless of their evolutionary distance. For instance, it has expanded carbon assimilation capabilities, e.g., efficiently degrades carboxylic acids, and has a higher diacylglycerol:triacylglycerol ratio and skewed phospholipid composition which suggests a more rigid cellular membrane. The bacterium can complement the host enzymatic capabilities, alter the fungal metabolism, cell membrane composition but does not change the composition of the cell wall of the fungus. Comparison of early-diverging Umbelopsidales with evolutionary younger Mucorales points at several subtle differences particularly in their carbon source preferences and encoded carbohydrate repertoire. Nevertheless, all tested Mucoromycotina share features including the ability to produce 18:3 gamma-linoleic acid, use TAG as the storage lipid and have fucose as a cell wall component.
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Affiliation(s)
- Anna Muszewska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Alicja Okrasińska
- Institute of Evolutionary Biology, Faculty of Biology, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
| | - Kamil Steczkiewicz
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Olga Drgas
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Małgorzata Orłowska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | | | | | - Katarzyna Szatraj
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Urszula Zielenkiewicz
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Sebastian Piłsyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Ewa Malc
- High Throughput Sequencing Facility of UNC, Chapel Hill, NC, United States
| | - Piotr Mieczkowski
- High Throughput Sequencing Facility of UNC, Chapel Hill, NC, United States
| | - Joanna S. Kruszewska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Przemysław Bernat
- Department of Industrial Microbiology and Biotechnology, Faculty of Biology and Environmental Protection, University of Łódź, Łódź, Poland
| | - Julia Pawłowska
- Institute of Evolutionary Biology, Faculty of Biology, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
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9
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Ali S, Jenkins B, Cheng J, Lobb B, Wei X, Egan S, Charles TC, McConkey BJ, Austin J, Doxey AC. Slr4, a newly identified S-layer protein from marine Gammaproteobacteria, is a major biofilm matrix component. Mol Microbiol 2020; 114:979-990. [PMID: 32804439 PMCID: PMC7821379 DOI: 10.1111/mmi.14588] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 08/06/2020] [Indexed: 01/03/2023]
Abstract
S‐layers are paracrystalline proteinaceous lattices that surround prokaryotic cells, forming a critical interface between the cells and their extracellular environment. Here, we report the discovery of a novel S‐layer protein present in the Gram‐negative marine organism, Pseudoalteromonas tunicata D2. An uncharacterized protein (EAR28894) was identified as the most abundant protein in planktonic cultures and biofilms. Bioinformatic methods predicted a beta‐helical structure for EAR28894 similar to the Caulobacter S‐layer protein, RsaA, despite sharing less than 20% sequence identity. Transmission electron microscopy revealed that purified EAR28894 protein assembled into paracrystalline sheets with a unique square lattice symmetry and a unit cell spacing of ~9.1 nm. An S‐layer was found surrounding the outer membrane in wild‐type cells and completely removed from cells in an EAR28894 deletion mutant. S‐layer material also appeared to be “shed” from wild‐type cells and was highly abundant in the extracellular matrix where it is associated with outer membrane vesicles and other matrix components. EAR28894 and its homologs form a new family of S‐layer proteins that are widely distributed in Gammaproteobacteria including species of Pseudoalteromonas and Vibrio, and found exclusively in marine metagenomes. We propose the name Slr4 for this novel protein family.
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Affiliation(s)
- Sura Ali
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
| | - Benjamin Jenkins
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
| | - Jiujun Cheng
- Department of Biology, University of Waterloo, Waterloo, ON, Canada.,Metagenom Bio Life Science Inc., Waterloo, ON, Canada
| | - Briallen Lobb
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
| | - Xin Wei
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
| | - Suhelen Egan
- Centre for Marine Science and Innovation and School of Biological, Earth and Environmental Sciences, The University of New South Wales Sydney, Sydney, NSW, Australia
| | - Trevor C Charles
- Department of Biology, University of Waterloo, Waterloo, ON, Canada.,Metagenom Bio Life Science Inc., Waterloo, ON, Canada
| | | | - John Austin
- Bureau of Microbial Hazards, Health Products and Food Branch, Health Canada, Ottawa, ON, Canada
| | - Andrew C Doxey
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
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10
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Blackler RJ, López-Guzmán A, Hager FF, Janesch B, Martinz G, Gagnon SML, Haji-Ghassemi O, Kosma P, Messner P, Schäffer C, Evans SV. Structural basis of cell wall anchoring by SLH domains in Paenibacillus alvei. Nat Commun 2018; 9:3120. [PMID: 30087354 PMCID: PMC6081394 DOI: 10.1038/s41467-018-05471-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 06/19/2018] [Indexed: 12/20/2022] Open
Abstract
Self-assembling protein surface (S-) layers are common cell envelope structures of prokaryotes and have critical roles from structural maintenance to virulence. S-layers of Gram-positive bacteria are often attached through the interaction of S-layer homology (SLH) domain trimers with peptidoglycan-linked secondary cell wall polymers (SCWPs). Here we present an in-depth characterization of this interaction, with co-crystal structures of the three consecutive SLH domains from the Paenibacillus alvei S-layer protein SpaA with defined SCWP ligands. The most highly conserved SLH domain residue SLH-Gly29 is shown to enable a peptide backbone flip essential for SCWP binding in both biophysical and cellular experiments. Furthermore, we find that a significant domain movement mediates binding by two different sites in the SLH domain trimer, which may allow anchoring readjustment to relieve S-layer strain caused by cell growth and division. Gram-positive bacterial envelopes comprise proteinaceous surface layers (S-layers) important for survival and virulence that are often anchored to the cell wall through secondary cell wall polymers. Here the authors use a structural and biophysical approach to define the molecular mechanism of this important interaction.
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Affiliation(s)
- Ryan J Blackler
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, V8W 3P6, Canada.,Zymeworks Inc., Vancouver, BC, V6H 3V9, Canada
| | - Arturo López-Guzmán
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, 1190, Vienna, Austria
| | - Fiona F Hager
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, 1190, Vienna, Austria
| | - Bettina Janesch
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, 1190, Vienna, Austria
| | - Gudrun Martinz
- Department of Chemistry, Universität für Bodenkultur Wien, 1190, Vienna, Austria
| | - Susannah M L Gagnon
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, V8W 3P6, Canada
| | - Omid Haji-Ghassemi
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, V8W 3P6, Canada.,Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - Paul Kosma
- Department of Chemistry, Universität für Bodenkultur Wien, 1190, Vienna, Austria
| | - Paul Messner
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, 1190, Vienna, Austria
| | - Christina Schäffer
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, 1190, Vienna, Austria.
| | - Stephen V Evans
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, V8W 3P6, Canada.
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11
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Klychnikov OI, Shamorkina TM, Weeks SD, van Leeuwen HC, Corver J, Drijfhout JW, van Veelen PA, Sluchanko NN, Strelkov SV, Hensbergen PJ. Discovery of a new Pro-Pro endopeptidase, PPEP-2, provides mechanistic insights into the differences in substrate specificity within the PPEP family. J Biol Chem 2018; 293:11154-11165. [PMID: 29794027 DOI: 10.1074/jbc.ra118.003244] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 05/22/2018] [Indexed: 12/20/2022] Open
Abstract
Pro-Pro endopeptidases (PPEPs) belong to a recently discovered family of proteases capable of hydrolyzing a Pro-Pro bond. The first member from the bacterial pathogen Clostridium difficile (PPEP-1) cleaves two C. difficile cell-surface proteins involved in adhesion, one of which is encoded by the gene adjacent to the ppep-1 gene. However, related PPEPs may exist in other bacteria and may shed light on substrate specificity in this enzyme family. Here, we report on the homolog of PPEP-1 in Paenibacillus alvei, which we denoted PPEP-2. We found that PPEP-2 is a secreted metalloprotease, which likewise cleaved a cell-surface protein encoded by an adjacent gene. However, the cleavage motif of PPEP-2, PLP↓PVP, is distinct from that of PPEP-1 (VNP↓PVP). As a result, an optimal substrate peptide for PPEP-2 was not cleaved by PPEP-1 and vice versa. To gain insight into the specificity mechanism of PPEP-2, we determined its crystal structure at 1.75 Å resolution and further confirmed the structure in solution using small-angle X-ray scattering (SAXS). We show that a four-amino-acid loop, which is distinct in PPEP-1 and -2 (GGST in PPEP-1 and SERV in PPEP-2), plays a crucial role in substrate specificity. A PPEP-2 variant, in which the four loop residues had been swapped for those from PPEP-1, displayed a shift in substrate specificity toward PPEP-1 substrates. Our results provide detailed insights into the PPEP-2 structure and the structural determinants of substrate specificity in this new family of PPEP proteases.
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Affiliation(s)
- Oleg I Klychnikov
- From the Laboratory for Biocrystallography, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, 3000 Leuven, Belgium
| | | | - Stephen D Weeks
- From the Laboratory for Biocrystallography, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, 3000 Leuven, Belgium
| | | | | | - Jan W Drijfhout
- Immunohematology and Blood Transfusion, Leiden University Medical Center, 2300 Leiden, The Netherlands
| | | | - Nikolai N Sluchanko
- the A. N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia, and.,the Department of Biophysics, Faculty of Biology, M. V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Sergei V Strelkov
- From the Laboratory for Biocrystallography, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, 3000 Leuven, Belgium
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12
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Hager FF, López-Guzmán A, Krauter S, Blaukopf M, Polter M, Brockhausen I, Kosma P, Schäffer C. Functional Characterization of Enzymatic Steps Involved in Pyruvylation of Bacterial Secondary Cell Wall Polymer Fragments. Front Microbiol 2018; 9:1356. [PMID: 29997588 PMCID: PMC6030368 DOI: 10.3389/fmicb.2018.01356] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 06/05/2018] [Indexed: 12/15/2022] Open
Abstract
Various mechanisms of protein cell surface display have evolved during bacterial evolution. Several Gram-positive bacteria employ S-layer homology (SLH) domain-mediated sorting of cell-surface proteins and concomitantly engage a pyruvylated secondary cell-wall polymer as a cell-wall ligand. Specifically, pyruvate ketal linked to β-D-ManNAc is regarded as an indispensable epitope in this cell-surface display mechanism. That secondary cell wall polymer (SCWP) pyruvylation and SLH domain-containing proteins are functionally coupled is supported by the presence of an ortholog of the predicted pyruvyltransferase CsaB in bacterial genomes, such as those of Bacillus anthracis and Paenibacillus alvei. The P. alvei SCWP, consisting of pyruvylated disaccharide repeats [→4)-β-D-GlcNAc-(1→3)-4,6-Pyr-β-D-ManNAc-(1→] serves as a model to investigate the widely unexplored pyruvylation reaction. Here, we reconstituted the underlying enzymatic pathway in vitro in combination with synthesized compounds, used mass spectrometry, and nuclear magnetic resonance spectroscopy for product characterization, and found that CsaB-catalyzed pyruvylation of β-D-ManNAc occurs at the stage of the lipid-linked repeat. We produced the P. alvei TagA (PAV_RS07420) and CsaB (PAV_RS07425) enzymes as recombinant, tagged proteins, and using a synthetic 11-phenoxyundecyl-diphosphoryl-α-GlcNAc acceptor, we uncovered that TagA is an inverting UDP-α-D-ManNAc:GlcNAc-lipid carrier transferase, and that CsaB is a pyruvyltransferase, with synthetic UDP-α-D-ManNAc and phosphoenolpyruvate serving as donor substrates. Next, to substitute for the UDP-α-D-ManNAc substrate, the recombinant UDP-GlcNAc-2-epimerase MnaA (PAV_RS07610) of P. alvei was included in this in vitro reconstitution system. When all three enzymes, their substrates and the lipid-linked GlcNAc primer were combined in a one-pot reaction, a lipid-linked SCWP repeat precursor analog was obtained. This work highlights the biochemical basis of SCWP biosynthesis and bacterial pyruvyl transfer.
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Affiliation(s)
- Fiona F Hager
- NanoGlycobiology Unit, Department of NanoBiotechnology, Universität für Bodenkultur Wien, Vienna, Austria
| | - Arturo López-Guzmán
- NanoGlycobiology Unit, Department of NanoBiotechnology, Universität für Bodenkultur Wien, Vienna, Austria
| | - Simon Krauter
- Division of Organic Chemistry, Department of Chemistry, Universität für Bodenkultur Wien, Vienna, Austria
| | - Markus Blaukopf
- Division of Organic Chemistry, Department of Chemistry, Universität für Bodenkultur Wien, Vienna, Austria
| | - Mathias Polter
- NanoGlycobiology Unit, Department of NanoBiotechnology, Universität für Bodenkultur Wien, Vienna, Austria
| | - Inka Brockhausen
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Paul Kosma
- Division of Organic Chemistry, Department of Chemistry, Universität für Bodenkultur Wien, Vienna, Austria
| | - Christina Schäffer
- NanoGlycobiology Unit, Department of NanoBiotechnology, Universität für Bodenkultur Wien, Vienna, Austria
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13
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Fünfhaus A, Göbel J, Ebeling J, Knispel H, Garcia-Gonzalez E, Genersch E. Swarming motility and biofilm formation of Paenibacillus larvae, the etiological agent of American Foulbrood of honey bees (Apis mellifera). Sci Rep 2018; 8:8840. [PMID: 29892084 PMCID: PMC5995878 DOI: 10.1038/s41598-018-27193-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 05/29/2018] [Indexed: 12/19/2022] Open
Abstract
American Foulbrood is a worldwide distributed, fatal disease of the brood of the Western honey bee (Apis mellifera). The causative agent of this fatal brood disease is the Gram-positive, spore-forming bacterium Paenibacillus larvae, which can be classified into four different genotypes (ERIC I-IV), with ERIC I and II being the ones isolated from contemporary AFB outbreaks. P. larvae is a peritrichously flagellated bacterium and, hence, we hypothesized that P. larvae is capable of coordinated and cooperative multicellular behaviors like swarming motility and biofilm formation. In order to analyze these behaviors of P. larvae, we firstly established appropriate functional assays. Using these assays we demonstrated that P. larvae ERIC II, but not P. larvae ERIC I, was capable of swarming. Swarming motility was hampered in a P. larvae ERIC II-mutant lacking production of paenilarvin, an iturin-like lipopeptide exclusively expressed by this genotype. Both genotypes were able to form free floating biofilm aggregates loosely attached to the walls of the culture wells. Visualizing the biofilms by Congo red and thioflavin S staining suggested structural differences between the biofilms formed. Biofilm formation was shown to be independent from paenilarvin production because the paenilarvin deficient mutant was comparably able to form a biofilm.
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Affiliation(s)
- Anne Fünfhaus
- Institute for Bee Research, Department of Molecular Microbiology and Bee Diseases, Hohen Neuendorf, Germany
| | - Josefine Göbel
- Institute for Bee Research, Department of Molecular Microbiology and Bee Diseases, Hohen Neuendorf, Germany
| | - Julia Ebeling
- Institute for Bee Research, Department of Molecular Microbiology and Bee Diseases, Hohen Neuendorf, Germany
| | - Henriette Knispel
- Institute for Bee Research, Department of Molecular Microbiology and Bee Diseases, Hohen Neuendorf, Germany
| | - Eva Garcia-Gonzalez
- Institute for Bee Research, Department of Molecular Microbiology and Bee Diseases, Hohen Neuendorf, Germany
| | - Elke Genersch
- Institute for Bee Research, Department of Molecular Microbiology and Bee Diseases, Hohen Neuendorf, Germany.
- Freie Universität Berlin, Fachbereich Veterinärmedizin, Institut für Mikrobiologie und Tierseuchen, Berlin, Germany.
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14
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Yegorenkova IV, Tregubova KV, Schelud’ko AV. Motility in liquid and semisolid media of Paenibacillus polymyxa associative rhizobacteria differing in exopolysaccharide yield and properties. Symbiosis 2017. [DOI: 10.1007/s13199-017-0492-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Kobayashi K, Kanesaki Y, Yoshikawa H. Genetic Analysis of Collective Motility of Paenibacillus sp. NAIST15-1. PLoS Genet 2016; 12:e1006387. [PMID: 27764113 PMCID: PMC5072692 DOI: 10.1371/journal.pgen.1006387] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 09/26/2016] [Indexed: 11/18/2022] Open
Abstract
Bacteria have developed various motility mechanisms to adapt to a variety of solid surfaces. A rhizosphere isolate, Paenibacillus sp. NAIST15-1, exhibited unusual motility behavior. When spotted onto 1.5% agar media, Paenibacillus sp. formed many colonies, each of which moved around actively at a speed of 3.6 μm/sec. As their density increased, each moving colony began to spiral, finally forming a static round colony. Despite its unusual motility behavior, draft genome sequencing revealed that both the composition and organization of flagellar genes in Paenibacillus sp. were very similar to those in Bacillus subtilis. Disruption of flagellar genes and flagellar stator operons resulted in loss of motility. Paenibacillus sp. showed increased transcription of flagellar genes and hyperflagellation on hard agar media. Thus, increased flagella and their rotation drive Paenibacillus sp. motility. We also identified a large extracellular protein, CmoA, which is conserved only in several Paenibacillus and related species. A cmoA mutant could neither form moving colonies nor move on hard agar media; however, motility was restored by exogenous CmoA. CmoA was located around cells and enveloped cell clusters. Comparison of cellular behavior between the wild type and cmoA mutant indicated that extracellular CmoA is involved in drawing water out of agar media and/or smoothing the cell surface interface. This function of CmoA probably enables Paenibacillus sp. to move on hard agar media.
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Affiliation(s)
- Kazuo Kobayashi
- Graduate School of Biological Sciences, Nara Institute of Science & Technology, Ikoma, Japan
- * E-mail:
| | - Yu Kanesaki
- NODAI Genome Research Center, Tokyo University of Agriculture, Setagaya-ku, Japan
| | - Hirofumi Yoshikawa
- NODAI Genome Research Center, Tokyo University of Agriculture, Setagaya-ku, Japan
- Department of Bioscience, Tokyo University of Agriculture, Setagaya-ku, Japan
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16
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Zhu C, Guo G, Ma Q, Zhang F, Ma F, Liu J, Xiao D, Yang X, Sun M. Diversity in S-layers. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2016; 123:1-15. [PMID: 27498171 DOI: 10.1016/j.pbiomolbio.2016.08.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 06/16/2016] [Accepted: 08/02/2016] [Indexed: 01/29/2023]
Abstract
Surface layers, referred simply as S-layers, are the two-dimensional crystalline arrays of protein or glycoprotein subunits on cell surface. They are one of the most common outermost envelope components observed in prokaryotic organisms (Archaea and Bacteria). Over the past decades, S-layers have become an issue of increasing interest due to their ubiquitousness, special features and functions. Substantial work in this field provides evidences of an enormous diversity in S-layers. This paper reviews and illustrates the diversity from several different aspects, involving the S-layer-carrying strains, the structure of S-layers, the S-layer proteins and genes, as well as the functions of S-layers.
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Affiliation(s)
- Chaohua Zhu
- College of Environment and Plant protection, Hainan University/Key Laboratory of Protection and Development Utilization of Tropical Crop Germplasm Resources (Hainan University), Ministry of Education, Haikou, 570228, Hainan, PR China
| | - Gang Guo
- Haikou Experimental Station/Hainan Key Laboratory of Banana Genetic Improvement, Chinese Academy of Tropical Agricultural Sciences, Haikou, 570102, Hainan, PR China; State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, PR China
| | - Qiqi Ma
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, PR China
| | - Fengjuan Zhang
- Haikou Experimental Station/Hainan Key Laboratory of Banana Genetic Improvement, Chinese Academy of Tropical Agricultural Sciences, Haikou, 570102, Hainan, PR China
| | - Funing Ma
- Haikou Experimental Station/Hainan Key Laboratory of Banana Genetic Improvement, Chinese Academy of Tropical Agricultural Sciences, Haikou, 570102, Hainan, PR China
| | - Jianping Liu
- Division of Functional Genomics, Department of Medical Biochemistry and Biophysics (MBB), Karolinska Institutet, Stockholm 17177, Sweden
| | - Dao Xiao
- Haikou Experimental Station/Hainan Key Laboratory of Banana Genetic Improvement, Chinese Academy of Tropical Agricultural Sciences, Haikou, 570102, Hainan, PR China
| | - Xiaolin Yang
- College of Environment and Plant protection, Hainan University/Key Laboratory of Protection and Development Utilization of Tropical Crop Germplasm Resources (Hainan University), Ministry of Education, Haikou, 570228, Hainan, PR China
| | - Ming Sun
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, PR China.
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17
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Janesch B, Schirmeister F, Maresch D, Altmann F, Messner P, Kolarich D, Schäffer C. Flagellin glycosylation in Paenibacillus alvei CCM 2051T. Glycobiology 2015; 26:74-87. [PMID: 26405108 DOI: 10.1093/glycob/cwv087] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 09/21/2015] [Indexed: 12/21/2022] Open
Abstract
Flagellin glycosylation impacts, in several documented cases, the functionality of bacterial flagella. The basis of flagellin glycosylation has been studied for various Gram-negative bacteria, but less is known about flagellin glycans of Gram-positive bacteria including Paenibacillus alvei, a secondary invader of honeybee colonies diseased with European foulbrood. Paenibacillus alvei CCM 2051(T) swarms vigorously on solidified culture medium, with swarming relying on functional flagella as evidenced by abolished biofilm formation of a non-motile P. alvei mutant defective in the flagellin protein Hag. Here, the glycobiology of the polar P. alvei flagella was investigated. Analysis on purified flagellin demonstrated that the 30-kDa Hag protein (PAV_2c01710) is modified with an O-linked trisaccharide comprised of one hexose and two N-acetyl-hexosamine residues, at three sites of glycosylation. Downstream of the hag gene on the bacterial chromosome, two open reading frames (PAV_2c01630, PAV_2c01640) encoding putative glycosyltransferases were shown to constitute a flagellin glycosylation island. Mutants defective in these genes exhibited altered migration in sodium dodecyl sulfate polyacrylamide gel electrophoresis as well as loss of extracellular flagella production and bacterial motility. This study reveals that flagellin glycosylation in P. alvei is pivotal to flagella formation and bacterial motility in vivo, and simultaneously identifies flagella glycosylation as a second protein O-glycosylation system in this bacterium, in addition to the well-investigated S-layer tyrosine O-glycosylation pathway.
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Affiliation(s)
- Bettina Janesch
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, Muthgasse 11, Vienna A-1190, Austria
| | - Falko Schirmeister
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Potsdam 14424, Germany Institute of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, Berlin 14195, Germany
| | - Daniel Maresch
- Department of Chemistry, Division of Biochemistry, Universität für Bodenkultur Wien, Muthgasse 18, Vienna A-1190, Austria
| | - Friedrich Altmann
- Department of Chemistry, Division of Biochemistry, Universität für Bodenkultur Wien, Muthgasse 18, Vienna A-1190, Austria
| | - Paul Messner
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, Muthgasse 11, Vienna A-1190, Austria
| | - Daniel Kolarich
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Potsdam 14424, Germany
| | - Christina Schäffer
- Department of NanoBiotechnology, NanoGlycobiology Unit, Universität für Bodenkultur Wien, Muthgasse 11, Vienna A-1190, Austria
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18
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Anzengruber J, Courtin P, Claes IJJ, Debreczeny M, Hofbauer S, Obinger C, Chapot-Chartier MP, Vanderleyden J, Messner P, Schäffer C. Biochemical characterization of the major N-acetylmuramidase from Lactobacillus buchneri. Microbiology (Reading) 2014; 160:1807-1819. [DOI: 10.1099/mic.0.078162-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Bacterial cell wall hydrolases are essential for peptidoglycan remodelling in regard to bacterial cell growth and division. In this study, peptidoglycan hydrolases (PGHs) of different Lactobacillus buchneri strains were investigated. First, the genome sequence of L. buchneri CD034 and L. buchneri NRRL B-30929 was analysed in silico for the presence of PGHs. Of 23 putative PGHs with different predicted hydrolytic specificities, the glycosyl hydrolase family 25 domain-containing homologues LbGH25B and LbGH25N from L. buchneri CD034 and NRRL B-30929, respectively, were selected and characterized in detail. Zymogram analysis confirmed hydrolysing activity on bacterial cell walls for both enzymes. Subsequent reversed-phase HPLC and MALDI-TOF MS analysis of the peptidoglycan breakdown products from L. buchneri strains CD034 and NRRL B-30929, and from Lactobacillus rhamnosus GG, which served as a reference, revealed that LbGH25B and LbGH25N have N-acetylmuramidase activity. Both enzymes were identified as cell wall-associated proteins by means of immunofluorescence microscopy and cellular fractionation, as well as by the ability of purified recombinant LbGH25B and LbGH25N to bind to L. buchneri cell walls in vitro. Moreover, similar secondary structures mainly composed of β-sheets and nearly identical thermal stabilities with T
m values around 49 °C were found for the two N-acetylmuramidases by far-UV circular dichroism spectroscopy. The functional and structural data obtained are discussed and compared to related PGHs. In this study, a major N-acetylmuramidase from L. buchneri was characterized in detail for the first time.
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Affiliation(s)
- Julia Anzengruber
- Department of NanoBiotechnology, NanoGlycobiology unit, Universität für Bodenkultur Wien, Muthgasse 11, 1190 Vienna, Austria
| | - Pascal Courtin
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
- INRA and AgroParisTech, UMR1319 Micalis, 78350 Jouy-en-Josas, France
| | - Ingmar J. J. Claes
- Center of Microbial and Plant Genetics, K.U. Leuven, 3001 Leuven, Belgium
| | - Monika Debreczeny
- VIBT Imaging Centre, Universität für Bodenkultur Wien, Muthgasse 11, 1190 Vienna, Austria
| | - Stefan Hofbauer
- Department of Chemistry, Universität für Bodenkultur Wien, Muthgasse 18, 1190 Vienna, Austria
| | - Christian Obinger
- Department of Chemistry, Universität für Bodenkultur Wien, Muthgasse 18, 1190 Vienna, Austria
| | - Marie-Pierre Chapot-Chartier
- AgroParisTech, UMR Micalis, Jouy-en-Josas, France
- INRA and AgroParisTech, UMR1319 Micalis, 78350 Jouy-en-Josas, France
| | - Jos Vanderleyden
- Center of Microbial and Plant Genetics, K.U. Leuven, 3001 Leuven, Belgium
| | - Paul Messner
- Department of NanoBiotechnology, NanoGlycobiology unit, Universität für Bodenkultur Wien, Muthgasse 11, 1190 Vienna, Austria
| | - Christina Schäffer
- Department of NanoBiotechnology, NanoGlycobiology unit, Universität für Bodenkultur Wien, Muthgasse 11, 1190 Vienna, Austria
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