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Prediction and characterisation of lantibiotic structures with molecular modelling and molecular dynamics simulations. Sci Rep 2019; 9:7169. [PMID: 31073133 PMCID: PMC6509333 DOI: 10.1038/s41598-019-42963-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 04/08/2019] [Indexed: 11/08/2022] Open
Abstract
Lantibiotics are lanthionine-containing bactericidal peptides produced by gram-positive bacteria as a defence mechanism against other bacterial species. Lantipeptides disrupt the integrity of target cells by forming pores in their cell membranes, or by preventing cell wall biosynthesis, which subsequently results in cell death. Lantibiotics are of immense importance to the food preservation and pharmaceutical industries. The rise in multidrug resistance demands the discovery of novel antimicrobials, and several authors advocate that lantibiotics hold the future of antimicrobial drug discovery. Owing to their amenability to structural modifications, novel lantibiotics with higher efficacy and antimicrobial activity can be constructed by bioengineering and nanoengineering strategies, and is opined to have immense therapeutic success in combating the rise in multidrug resistance. Understanding the structure and dynamics of lantibiotics is therefore crucial for the development of novel lantipeptides, and this study aimed to study the structural properties and dynamics of 37 lantibiotics using computational strategies. The structures of these 37 lantibiotics were constructed from homology, and their structural stability and compactness were analysed by molecular dynamics simulations. The phylogenetic relationships, physicochemical properties, disordered regions, pockets, intramolecular bonds and interactions, and structural diversity of the 37 lantipeptides were studied. The structures of the 37 lantipeptides constructed herein remained stable throughout simulation. The study revealed that the structural diversity of lantibiotics is not significantly correlated to sequence diversity, and this property could be exploited for designing novel lantipeptides with higher efficacy.
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52
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Schmitt S, Montalbán-López M, Peterhoff D, Deng J, Wagner R, Held M, Kuipers OP, Panke S. Analysis of modular bioengineered antimicrobial lanthipeptides at nanoliter scale. Nat Chem Biol 2019; 15:437-443. [PMID: 30936500 DOI: 10.1038/s41589-019-0250-5] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 02/20/2019] [Indexed: 01/22/2023]
Abstract
The rise of antibiotic resistance demands the acceleration of molecular diversification strategies to inspire new chemical entities for antibiotic medicines. We report here on the large-scale engineering of ribosomally synthesized and post-translationally modified antimicrobial peptides carrying the ring-forming amino acid lanthionine. New-to-nature variants featuring distinct properties were obtained by combinatorial shuffling of peptide modules derived from 12 natural antimicrobial lanthipeptides and processing by a promiscuous post-translational modification machinery. For experimental characterization, we developed the nanoFleming, a miniaturized and parallelized high-throughput inhibition assay. On the basis of a hit set of >100 molecules, we identified variants with improved activity against pathogenic bacteria and shifted activity profiles, and extrapolated design guidelines that will simplify the identification of peptide-based anti-infectives in the future.
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Affiliation(s)
- Steven Schmitt
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland
| | | | - David Peterhoff
- Institute of Medical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany
| | - Jingjing Deng
- Department of Molecular Genetics, University of Groningen, Groningen, The Netherlands
| | - Ralf Wagner
- Institute of Medical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany.,Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Martin Held
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland
| | - Oscar P Kuipers
- Department of Molecular Genetics, University of Groningen, Groningen, The Netherlands.
| | - Sven Panke
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland.
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53
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Qin Y, Wang Y, He Y, Zhang Y, She Q, Chai Y, Li P, Shang Q. Characterization of Subtilin L-Q11, a Novel Class I Bacteriocin Synthesized by Bacillus subtilis L-Q11 Isolated From Orchard Soil. Front Microbiol 2019; 10:484. [PMID: 30930878 PMCID: PMC6429107 DOI: 10.3389/fmicb.2019.00484] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 02/25/2019] [Indexed: 12/25/2022] Open
Abstract
Bacteriocins are peptides or proteins synthesized by bacterial ribosomes that show killing or inhibitory activities against different groups of bacteria. Bacteriocins are considered potential alternatives to traditional antibiotics, preservatives in pharmaceutical and food industries. A strain L-Q11 isolated from orchard soil was phylogenetically characterized as Bacillus subtilis based on 16S rRNA gene sequencing analysis. A novel class I bacteriocin (Subtilin L-Q11), was identified and purified from L-Q11 cell-free supernatant in a four-step procedure, including salt precipitation, cation exchange, gel filtration, and reverse-phase high-performance liquid chromatography (RP-HPLC). The molecular mass (3,552.9 Da) of this novel bacteriocin was determined by Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS). The purified Subtilin L-Q11 exhibited optimal features in pH tolerance, thermostability, and sensitivity to proteases. Further, Subtilin L-Q11 showed inhibitory activities against a number of bacteria including some human pathogens and food spoilage bacteria, in particular Staphylococcus aureus. All these important features make this novel bacteriocin a potential candidate for the development of a new antibacterial drug or food preservative in the future.
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Affiliation(s)
- Yuxuan Qin
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, Key Laboratory of Functional Dairy, China Agricultural University, Beijing, China.,Department of Biology, Northeastern University, Boston, MA, United States
| | - Yao Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, Key Laboratory of Functional Dairy, China Agricultural University, Beijing, China
| | - Yinghao He
- Department of Biology, Northeastern University, Boston, MA, United States
| | - Ying Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, Key Laboratory of Functional Dairy, China Agricultural University, Beijing, China
| | - Qianxuan She
- Department of Biology, Northeastern University, Boston, MA, United States
| | - Yunrong Chai
- Department of Biology, Northeastern University, Boston, MA, United States
| | - Pinglan Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, Key Laboratory of Functional Dairy, China Agricultural University, Beijing, China
| | - Qingmao Shang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, The Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
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54
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Paenibacillus polymyxa bioactive compounds for agricultural and biotechnological applications. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101092] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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55
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Gomes J, Barbosa J, Teixeira P. Natural Antimicrobial Agents as an Alternative to Chemical Antimicrobials in the Safety and Preservation of Food Products. ACTA ACUST UNITED AC 2019. [DOI: 10.2174/2212796812666180511115037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:Microbiological quality of food is of utmost importance in the food industry, so the use of food additives is essential to reduce microbial loads, which may result in food spoilage and poisoning.Objective:This study aimed to test the antimicrobial activity of three natural compounds – chitosan, ethanolic extract of propolis, and nisin – against 15 Gram-positive bacteria, 15 Gram-negative bacteria and two fungi and, also, to compare it with the antimicrobial activity of the chemical compound sodium nitrite, alone and in combination with sodium chloride.Methods:Antimicrobial activity was tested at different pH values and temperatures of incubation to simulate the presence of the pathogens in different food products and different storage conditions, as well as to determine their influence on the inhibition of microorganisms.Results:Most of the Gram-positive bacteria were inhibited at 25 µg/mL of nisin. Concentrations of 10 mg/mL of ethanolic extract of propolis inhibited fungi, most of the Gram-positive and some Gramnegative bacteria, and with concentrations of 0.65% (w/v) of chitosan, it was possible to inhibit most of the tested microorganisms. All the natural compounds tested had greater inhibitory effect against the various microorganisms compared with sodium nitrite alone and in combination with sodium chloride, in the different conditions of pH and temperature.Conclusion:This suggests that natural compounds could be good candidates for use as an alternative to chemical antimicrobials in food safety and preservation.
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Affiliation(s)
- Joana Gomes
- Universidade Catolica Portuguesa, Escola Superior de Biotecnologia, CBQF – Centro de Biotecnologia e Quimica Fina, Porto, Portugal
| | - Joana Barbosa
- Universidade Catolica Portuguesa, Escola Superior de Biotecnologia, CBQF – Centro de Biotecnologia e Quimica Fina, Porto, Portugal
| | - Paula Teixeira
- Universidade Catolica Portuguesa, Escola Superior de Biotecnologia, CBQF – Centro de Biotecnologia e Quimica Fina, Porto, Portugal
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56
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Lagedroste M, Reiners J, Smits SHJ, Schmitt L. Systematic characterization of position one variants within the lantibiotic nisin. Sci Rep 2019; 9:935. [PMID: 30700815 PMCID: PMC6353901 DOI: 10.1038/s41598-018-37532-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 12/04/2018] [Indexed: 11/09/2022] Open
Abstract
Lantibiotics are a growing class of natural compounds, which possess antimicrobial activity against a broad range of Gram-positive bacteria. Their high potency against human pathogenic strains such as MRSA and VRE makes them excellent candidates as substitutes for classic antibiotics in times of increasing multidrug resistance of bacterial strains. New lantibiotics are detected in genomes and can be heterologously expressed. The functionality of these novel lantibiotics requires a systematic purification and characterization to benchmark them against for example the well-known lantibiotic nisin. Here, we used a standardized workflow to characterize lantibiotics consisting of six individual steps. The expression and secretion of the lantibiotic was performed employing the promiscuous nisin modification machinery. We mutated the first amino acid of nisin into all proteinaceous amino acids and compared their bactericidal potency against sensitive strains as well as strains expressing nisin resistance proteins. Interestingly, we can highlight four distinct groups based on the residual activity of nisin against sensitive as well as resistant L. lactis strains.
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Affiliation(s)
- Marcel Lagedroste
- Institute of Biochemistry, Heinrich-Heine-University Duesseldorf, Universitaetsstrasse 1, 40225, Duesseldorf, Germany
| | - Jens Reiners
- Institute of Biochemistry, Heinrich-Heine-University Duesseldorf, Universitaetsstrasse 1, 40225, Duesseldorf, Germany
| | - Sander H J Smits
- Institute of Biochemistry, Heinrich-Heine-University Duesseldorf, Universitaetsstrasse 1, 40225, Duesseldorf, Germany.
| | - Lutz Schmitt
- Institute of Biochemistry, Heinrich-Heine-University Duesseldorf, Universitaetsstrasse 1, 40225, Duesseldorf, Germany.
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57
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Lactic Acid Bacteria (LAB) and Their Bacteriocins as Alternative Biotechnological Tools to Control Listeria monocytogenes Biofilms in Food Processing Facilities. Mol Biotechnol 2018; 60:712-726. [PMID: 30073512 DOI: 10.1007/s12033-018-0108-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Bacteriocins are antimicrobial peptides produced by bacteria Gram-negative and Gram-positive, including lactic acid bacteria (LAB), organisms that are traditionally used in food preservation practices. Bacteriocins have been shown to have an aptitude as biofilm controlling agents in Listeria monocytogenes biofilms, a major risk for consumers and the food industry. Biofilms protect pathogens from sanitization procedures, allowing them to survive and persist in processing facilities, resulting in the cross-contamination of the end products. Studies have been undertaken on bacteriocinogenic LAB, their bacteriocins, and bioengineered bacteriocin derivatives for controlling L. monocytogenes biofilms on different surfaces through inhibition, competition, exclusion, and displacement. These alternative strategies can be considered promising in preventing the development of resistance to conventional sanitizers and disinfectants. Bacteriocins are "friendly" antimicrobial agents, and with high prevalence in nature, they do not have any known associated public health risk. Most trials have been carried out in vitro, on food contact materials such as polystyrene and stainless steel, while there have been few studies performed in situ to consolidate the results observed in vitro. There are strategies that can be employed for prevention and eradication of L. monocytogenes biofilms (such as the establishment of standard cleaning procedures using the available agents at proper concentrations). However, commercial cocktails using alternatives compounds recognized as safe and environmental friendly can be an alternative approach to be applied by the industries in the future.
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58
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Poorinmohammad N, Hamedi J, Moghaddam MHAM. Sequence-based analysis and prediction of lantibiotics: A machine learning approach. Comput Biol Chem 2018; 77:199-206. [PMID: 30342319 DOI: 10.1016/j.compbiolchem.2018.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 08/15/2018] [Accepted: 10/05/2018] [Indexed: 10/28/2022]
Abstract
Lantibiotics, an important group of ribosomally synthesized peptides, represent an important arsenal of novel promising antimicrobials showing high potency in fighting against the prevalence of antibiotic resistance among microbial pathogens. However, due to the lack of high throughput strategies for the isolation and identification of these compounds, our information regarding their structure and especially sequence-based properties is far from complete. Therefore, in the present study, a comprehensive sequence-based analysis of these peptides was performed with the help of machine learning approach together with a feature selection technique. Meanwhile, an attempt to develop an accurate computational model for prediction of lantibiotics was made via constructing two datasets of 280 and 190 lantibiotic and non-lantibiotic antimicrobial peptide sequences, respectively. Based on the conducted approach and as a result of our search for a subset of relevant features of lantibiotics, particular types of sequenced-based features were observed to be preferred in lantibiotics, the knowledge-based implementation of which can be used as strategies for lantibiotic bioengineering purposes. Moreover, a SMO-based classifier was developed for the prediction of lantibiotics with the accuracy and specificity values of 88.5% and 94%, respectively which shows the great potential of the developed algorithm for the prediction of lantibiotcs. Conclusively, the accurate predictor algorithm as well as the identified sequence-based distinctiveness properties of lantibiotics can give valuable information in both the fields of lantibiotic discovery and bioengineering.
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Affiliation(s)
- Naghmeh Poorinmohammad
- Department of Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran; Microbial Technology and Products Research Center, University of Tehran, Tehran, Iran
| | - Javad Hamedi
- Department of Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran; Microbial Technology and Products Research Center, University of Tehran, Tehran, Iran.
| | - Mohammad Hossein Abbaspour Motlagh Moghaddam
- Department of Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran; Microbial Technology and Products Research Center, University of Tehran, Tehran, Iran
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59
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De Leon Rodriguez LM, Williams ET, Brimble MA. Chemical Synthesis of Bioactive Naturally Derived Cyclic Peptides Containing Ene‐Like Rigidifying Motifs. Chemistry 2018; 24:17869-17880. [DOI: 10.1002/chem.201802533] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Indexed: 12/12/2022]
Affiliation(s)
| | - Elyse T. Williams
- School of Chemical SciencesThe University of Auckland 23 Symonds St. Auckland 1142 New Zealand
| | - Margaret A. Brimble
- School of Biological SciencesThe University of Auckland 3 Symonds St. Auckland 1142 New Zealand
- School of Chemical SciencesThe University of Auckland 23 Symonds St. Auckland 1142 New Zealand
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60
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Alkhalili RN, Canbäck B. Identification of Putative Novel Class-I Lanthipeptides in Firmicutes: A Combinatorial In Silico Analysis Approach Performed on Genome Sequenced Bacteria and a Close Inspection of Z-Geobacillin Lanthipeptide Biosynthesis Gene Cluster of the Thermophilic Geobacillus sp. Strain ZGt-1. Int J Mol Sci 2018; 19:E2650. [PMID: 30200662 PMCID: PMC6165006 DOI: 10.3390/ijms19092650] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 08/23/2018] [Accepted: 09/04/2018] [Indexed: 01/03/2023] Open
Abstract
Lanthipeptides are ribosomally synthesized and post-translationally modified polycyclic peptides. Lanthipeptides that have antimicrobial activity are known as lantibiotics. Accordingly, the discovery of novel lantibiotics constitutes a possible solution for the problem of antibiotic resistance. We utilized the publicly available genome sequences and the bioinformatic tools tailored for the detection of lanthipeptides. We designed our strategy for screening of 252 firmicute genomes and detecting class-I lanthipeptide-coding gene clusters. The designed strategy resulted in identifying 69 class-I lanthipeptide sequences, of which more than 10% were putative novel. The identified putative novel lanthipeptides have not been annotated on the original or the RefSeq genomes, or have been annotated merely as coding for hypothetical proteins. Additionally, we identified bacterial strains that have not been previously recognized as lanthipeptide-producers. Moreover, we suggest corrections for certain firmicute genome annotations, and recommend lanthipeptide records for enriching the bacteriocin genome mining tool (BAGEL) databases. Furthermore, we propose Z-geobacillin, a putative class-I lanthipeptide coded on the genome of the thermophilic strain Geobacillus sp. ZGt-1. We provide lists of putative novel lanthipeptide sequences and of the previously unrecognized lanthipeptide-producing bacterial strains, so they can be prioritized for experimental investigation. Our results are expected to benefit researchers interested in the in vitro production of lanthipeptides.
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Affiliation(s)
- Rawana N Alkhalili
- Biotechnology, Department of Chemistry, Lund University, SE-221 00 Lund, Sweden.
| | - Björn Canbäck
- Department of Biology, Lund University, SE-221 00 Lund, Sweden.
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61
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Flórez AB, Mayo B. Genome Analysis of Lactobacillus plantarum LL441 and Genetic Characterisation of the Locus for the Lantibiotic Plantaricin C. Front Microbiol 2018; 9:1916. [PMID: 30174666 PMCID: PMC6107846 DOI: 10.3389/fmicb.2018.01916] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 07/30/2018] [Indexed: 11/13/2022] Open
Abstract
Bacteriocins are ribosomally synthesized peptides produced by bacteria with antimicrobial activity. The bacteriocins produced by lactic acid bacteria (LAB) may inhibit food-borne pathogens and spoilage organisms, and therefore have potential as natural preservatives. Lactobacillus plantarum LL441 produces a lantibiotic bacteriocin known as plantaricin C, a pore-forming antimicrobial peptide containing modified amino acids that inhibits cell wall synthesis by forming a complex with the peptidoglycan precursor lipid II. The present work describes the genome sequencing of L. plantarum LL441 and the characterisation of the plantaricin C locus. The draft genome sequence of L. plantarum LL441 consisted of 170 contigs and had a total 3,124,603 bp; the GC content was 44.52%. The plantaricin C locus was found in an 18 kbp-long contig, and consisted of six genes organized in an operon-like arrangement. This locus included the bacteriocin structural gene (plnC), followed by a gene encoding a LanM-like protein thought to be involved in the maturation of plantaricin C, and four downstream genes encoding ABC-type transporter components, probably belonging to its putative immunity and export machinery. plnC encodes a precursor of the bacteriocin, i.e., a 58-amino acid peptide containing a 31-amino acid double-glycine leader peptide and a 27-amino acid core peptide. In silico analysis and hybridisation experiments placed the plantaricin C locus to be located on pLL441-1, a large plasmid of L. plantarum LL441. Joining up the gaps between the contigs by conventional PCR, sequencing of the amplicons, and sequence assemblage, allowed the complete 55.3 kbp pLL441-1 molecule to be established. A portion of pLL441-1 larger than 34 kbp, which included the plantaricin C region, was identified in a plasmid-derived contig from the L. plantarum Nizo 3893 genome. Further, the plantaricin C coding locus (about 8.7 kbp) was shown to share 91% nucleotide identity with a portion of the plasmids pPECL-6 from Pediococcus claussenii ATCC BAA-344 and pL11995-4 from Lactobacillus paracollinoides TMW 1.1995. Knowledge of the sequence of the plantaricin C coding region will help in studying its molecular components and allow their involvement in bacteriocin synthesis to be investigated, facilitating the use of the bacteriocin or its genetic elements in new biotechnological applications.
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Affiliation(s)
- Ana B Flórez
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias - Consejo Superior de Investigaciones Científicas, Villaviciosa, Spain
| | - Baltasar Mayo
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias - Consejo Superior de Investigaciones Científicas, Villaviciosa, Spain
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63
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Ongey EL, Giessmann RT, Fons M, Rappsilber J, Adrian L, Neubauer P. Heterologous Biosynthesis, Modifications and Structural Characterization of Ruminococcin-A, a Lanthipeptide From the Gut Bacterium Ruminococcus gnavus E1, in Escherichia coli. Front Microbiol 2018; 9:1688. [PMID: 30093894 PMCID: PMC6071512 DOI: 10.3389/fmicb.2018.01688] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 07/06/2018] [Indexed: 11/13/2022] Open
Abstract
Ruminococcin A (RumA) is a lanthipeptide with high activity against pathogenic clostridia and is naturally produced by the strict anaerobic bacterium Ruminococcus gnavus E1, isolated from human intestine. Cultivating R. gnavus E1 is challenging, limiting high-quality production, further biotechnological development and therapeutic exploitation of RumA. To supply an alternative production system, the gene encoding RumA-modifying enzyme (RumM) and the gene encoding the unmodified precursor peptide (preRumA) were amplified from the chromosome of R. gnavus E1 and coexpressed in Escherichia coli. Our results show that the ruminococcin-A lanthionine synthetase RumM catalyzed dehydration of threonine and serine residues and subsequently installed thioether bridges into the core structure of a mutant version of preRumA (preRumA∗). These modifications were achieved when the peptide was expressed as a fusion protein together with green fluorescence protein (GFP), demonstrating that a larger attachment to the N-terminus of the leader peptide does not obstruct in vivo processivity of RumM in modifying the core peptide. The leader peptide serves as a docking sequence which the modifying enzyme recognizes and interacts with, enabling its catalytic role. We further investigated RumM catalysis in conjunction with the formation of complexes observed between RumM and the chimeric GFP fusion protein. Results obtained suggested some insights into the catalytic mechanisms of class II lanthipeptide synthetases. Our data further indicated the presence of three thioether bridges, contradicting a previous report whose findings ruled out the possibility of forming a third ring in RumA. Modified preRumA∗ was activated in vitro by removing the leader peptide using trypsin and biological activity was achieved against Bacillus subtilis ATCC 6633. A production yield of 6 mg of pure modified preRumA∗ per liter of E. coli culture was attained and considering the size ratio of the leader-to-core segments of preRumA∗, this amount would generate a final yield of approximately 1-2 mg of active RumA when the leader peptide is removed. The yield of our system exceeds that attainable in the natural producer by several 1000-fold. The system developed herein supplies useful tools for product optimization and for performing in vivo peptide engineering to generate new analogs with superior anti-infective properties.
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Affiliation(s)
- Elvis L Ongey
- Chair of Bioprocess Engineering, Institute of Biotechnology, Technische Universität Berlin, Berlin, Germany
| | - Robert T Giessmann
- Chair of Bioprocess Engineering, Institute of Biotechnology, Technische Universität Berlin, Berlin, Germany
| | - Michel Fons
- Aix Marseille Univ, CNRS, BIP UMR 7281, Marseille, France
| | - Juri Rappsilber
- Institute of Biotechnology, Technische Universität Berlin, Berlin, Germany
| | - Lorenz Adrian
- Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany.,Chair of Geobiotechnology, Institute of Biotechnology, Technische Universität Berlin, Berlin, Germany
| | - Peter Neubauer
- Chair of Bioprocess Engineering, Institute of Biotechnology, Technische Universität Berlin, Berlin, Germany
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64
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Bioinspired Designs, Molecular Premise and Tools for Evaluating the Ecological Importance of Antimicrobial Peptides. Pharmaceuticals (Basel) 2018; 11:ph11030068. [PMID: 29996512 PMCID: PMC6161137 DOI: 10.3390/ph11030068] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/06/2018] [Accepted: 07/07/2018] [Indexed: 02/07/2023] Open
Abstract
This review article provides an overview of recent developments in antimicrobial peptides (AMPs), summarizing structural diversity, potential new applications, activity targets and microbial killing responses in general. The use of artificial and natural AMPs as templates for rational design of peptidomimetics are also discussed and some strategies are put forward to curtail cytotoxic effects against eukaryotic cells. Considering the heat-resistant nature, chemical and proteolytic stability of AMPs, we attempt to summarize their molecular targets, examine how these macromolecules may contribute to potential environmental risks vis-à-vis the activities of the peptides. We further point out the evolutional characteristics of the macromolecules and indicate how they can be useful in designing target-specific peptides. Methods are suggested that may help to assess toxic mechanisms of AMPs and possible solutions are discussed to promote the development and application of AMPs in medicine. Even if there is wide exposure to the environment like in the hospital settings, AMPs may instead contribute to prevent healthcare-associated infections so long as ecotoxicological aspects are considered.
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65
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Gherghisan-Filip C, Saalbach G, Hatziioanou D, Narbad A, Mayer MJ. Processing and Structure of the Lantibiotic Peptide Nso From the Human Gut Bacterium Blautia obeum A2-162 analysed by Mass Spectrometry. Sci Rep 2018; 8:10077. [PMID: 29973605 PMCID: PMC6031655 DOI: 10.1038/s41598-018-28248-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 06/04/2018] [Indexed: 01/02/2023] Open
Abstract
A previously reported gene cluster encoding four nisin-like peptides, three with the same sequence (NsoA1-3) and the unique NsoA4, produced antimicrobial activity in the presence of trypsin after heterologous expression in Lactococcus lactis. Protein extracts were separated by SDS gel electrophoresis or immunoprecipitation using an antibody to the NsoA2 leader. Tryptic peptides observed by LC-MS/MS covered the complete sequence of preNsoA1-3 and part of the leader sequence of preNsoA4 and confirmed the expression and the predicted sequences of the preNsoA peptides. Further, the data revealed that the preNsoA1-3 peptides were partly modified with dehydrations and formation of lanthionine rings. A certain amount of fully modified preNsoA1-3 was observed. Details of modifications of the core peptide and the C-terminal tryptic peptide TATCGCHITGK covering rings D and E indicated that 22% of these preNsoA1-3 peptides were completely modified. A lower amount of ring formation is estimated for rings A-C. Intact masses of immunoprecipitation-derived peptides determined by LC-MS accurately matched the expected preNsoA precursor peptides. The most abundant peptides detected were preNsoA2-3-8H2O followed by preNsoA1-8H2O and other states of dehydration. The results confirm incomplete processing of preNsoA peptides in the heterologous system, with the formation of a certain amount of fully modified peptides.
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Affiliation(s)
- Cristina Gherghisan-Filip
- Quadram Institute Bioscience, Gut Microbes and Health Institute Strategic Programme, Norwich Research Park, Norwich, NR4 7UA, UK.,University of East Anglia, UEA, Norwich Medical School, Norwich, NR4 7TJ, UK
| | - Gerhard Saalbach
- John Innes Centre, Department of Biological Chemistry, Norwich Research Park, Norwich, NR4 7UH, UK.
| | - Diane Hatziioanou
- Quadram Institute Bioscience, Gut Microbes and Health Institute Strategic Programme, Norwich Research Park, Norwich, NR4 7UA, UK
| | - Arjan Narbad
- Quadram Institute Bioscience, Gut Microbes and Health Institute Strategic Programme, Norwich Research Park, Norwich, NR4 7UA, UK
| | - Melinda J Mayer
- Quadram Institute Bioscience, Gut Microbes and Health Institute Strategic Programme, Norwich Research Park, Norwich, NR4 7UA, UK.
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66
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Kobayashi H, Suzuki N, Ogra Y. Mutagenicity comparison of nine bioselenocompounds in three Salmonella typhimurium strains. Toxicol Rep 2018; 5:220-223. [PMID: 29854592 PMCID: PMC5978006 DOI: 10.1016/j.toxrep.2018.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 01/11/2018] [Accepted: 01/22/2018] [Indexed: 11/30/2022] Open
Abstract
Selenium (Se) is an essential element in animals but becomes severely toxic when the amount ingested exceeds the adequate intake level. It is known that the toxicological effects of Se are highly dependent on its chemical form. In this study, we evaluated the mutagenicity of nine naturally occurring Se compounds or the so-called bioselenocompounds, including selenite, selenate, selenocyanate, selenomethionine, selenocystine, Se-methylselenocysteine, selenohomolanthionine, N-acetylgalactosamine-type selenosugar, and trimethylselenonium ion, by using the Ames test. Salmonella typhimurium TA98, TA100, and TA1535 were used for the mutagenicity evaluation in the presence or absence of S9 mix, a metabolic activator. Only selenate showed weak mutagenicity even in the absence of S9 mix. None of the bioselenocompounds except selenate exhibited mutagenicity in all the strains tested in the presence or absence of S9 mix. Selenomethionine and selenocystine reduced the number of colonies in all the strains although no other selenoamino acids exerted the same effect. These results indicate that selenate directly or indirectly injures genome. Among the bioselenocompounds tested, selenomethionine and selenocystine show antibacterial activity, but the mechanism is unclear.
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Affiliation(s)
- Hironori Kobayashi
- Laboratory of Toxicology and Environmental Health, Graduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan
| | - Noriyuki Suzuki
- Laboratory of Toxicology and Environmental Health, Graduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan
| | - Yasumitsu Ogra
- Laboratory of Toxicology and Environmental Health, Graduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan
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67
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Bartholomae M, Baumann T, Nickling JH, Peterhoff D, Wagner R, Budisa N, Kuipers OP. Expanding the Genetic Code of Lactococcus lactis and Escherichia coli to Incorporate Non-canonical Amino Acids for Production of Modified Lantibiotics. Front Microbiol 2018; 9:657. [PMID: 29681891 PMCID: PMC5897534 DOI: 10.3389/fmicb.2018.00657] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 03/21/2018] [Indexed: 12/19/2022] Open
Abstract
The incorporation of non-canonical amino acids (ncAAs) into ribosomally synthesized and post-translationally modified peptides, e.g., nisin from the Gram-positive bacterium Lactococcus lactis, bears great potential to expand the chemical space of various antimicrobials. The ncAA Nε-Boc-L-lysine (BocK) was chosen for incorporation into nisin using the archaeal pyrrolysyl-tRNA synthetase–tRNAPyl pair to establish orthogonal translation in L. lactis for read-through of in-frame amber stop codons. In parallel, recombinant nisin production and orthogonal translation were combined in Escherichia coli cells. Both organisms synthesized bioactive nisin(BocK) variants. Screening of a nisin amber codon library revealed suitable sites for ncAA incorporation and two variants displayed high antimicrobial activity. Orthogonal translation in E. coli and L. lactis presents a promising tool to create new-to-nature nisin derivatives.
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Affiliation(s)
- Maike Bartholomae
- Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, Netherlands
| | - Tobias Baumann
- Biocatalysis Group, Department of Chemistry, Technische Universität Berlin (Berlin Institute of Technology), Berlin, Germany
| | - Jessica H Nickling
- Biocatalysis Group, Department of Chemistry, Technische Universität Berlin (Berlin Institute of Technology), Berlin, Germany
| | - David Peterhoff
- Institute of Medical Microbiology and Hygiene, Universität Regensburg, Regensburg, Germany
| | - Ralf Wagner
- Institute of Medical Microbiology and Hygiene, Universität Regensburg, Regensburg, Germany
| | - Nediljko Budisa
- Biocatalysis Group, Department of Chemistry, Technische Universität Berlin (Berlin Institute of Technology), Berlin, Germany
| | - Oscar P Kuipers
- Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, Netherlands
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68
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Bengtsson T, Lönn J, Khalaf H, Palm E. The lantibiotic gallidermin acts bactericidal against Staphylococcus epidermidis and Staphylococcus aureus and antagonizes the bacteria-induced proinflammatory responses in dermal fibroblasts. Microbiologyopen 2018. [PMID: 29536668 PMCID: PMC6291784 DOI: 10.1002/mbo3.606] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Antimicrobial resistance needs to be tackled from new angles, and antimicrobial peptides could be future candidates for combating bacterial infections. This study aims to investigate in vitro the bactericidal effects of the lantibiotic gallidermin on Staphylococcus epidermidis and Staphylococcus aureus, possible cytotoxic effects and its impact on host-microbe interactions. Minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) of gallidermin were determined, and cytotoxicity and proinflammatory effects of gallidermin on fibroblasts, red blood cells (RBCs) and in whole blood were investigated. Both MIC and MBC for all four tested strains of S. epidermidis was 6.25 μg/ml. Both MIC and MBC for methicillin-sensitive S. aureus was 12.5 μg/ml and for methicillin-resistant S. aureus (MRSA) 1.56 μg/ml. Gallidermin displayed no cytotoxic effects on fibroblasts, only a high dose of gallidermin induced low levels of CXCL8 and interleukin-6. Gallidermin hemolyzed less than 1% of human RBCs, and did not induce reactive oxygen species production or cell aggregation in whole blood. In cell culture, gallidermin inhibited the cytotoxic effects of the bacteria and totally suppressed the bacteria-induced release of CXCL8 and interleukin-6 from fibroblasts. We demonstrate that gallidermin, expressing low cell cytotoxicity, is a promising candidate for treating bacterial infections caused by S. epidermidis and S. aureus, especially MRSA.
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Affiliation(s)
| | - Johanna Lönn
- Department of Oral Biology, Institute of Odontology, Malmö University, Malmö, Sweden.,PEAS Research Institute, Linköping, Sweden
| | - Hazem Khalaf
- Department of Medical Sciences, Örebro University, Örebro, Sweden
| | - Eleonor Palm
- Department of Medical Sciences, Örebro University, Örebro, Sweden
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69
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CerR, a Single-Domain Regulatory Protein of the LuxR Family, Promotes Cerecidin Production and Immunity in Bacillus cereus. Appl Environ Microbiol 2018; 84:AEM.02245-17. [PMID: 29247062 DOI: 10.1128/aem.02245-17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 12/12/2017] [Indexed: 12/14/2022] Open
Abstract
Cerecidins are small lantibiotics from Bacillus cereus that were obtained using a semi-in vitro biosynthesis strategy and showed prominent antimicrobial activities against certain Gram-positive bacteria. However, the parental strain B. cereus As 1.1846 is incapable of producing cerecidins, most probably due to the transcriptional repression of the cerecidin gene cluster. Located in the cerecidin gene cluster, cerR encodes a putative response regulator protein that belongs to the LuxR family transcriptional regulators. CerR (84 amino acids) contains only a conserved DNA binding domain and lacks a conventional phosphorylation domain, which is rarely found in lantibiotic gene clusters. To investigate its function in cerecidin biosynthesis, cerR was constitutively expressed in B. cereus As 1.1846. Surprisingly, Constitutive expression of cerR enabled the production of cerecidins and enhanced self-immunity of B. cereus toward cerecidins. Reverse transcription-PCR analysis and electrophoresis mobility shift assays indicated, respectively, that the cer cluster was transcribed in two transcripts (cerAM and cerRTPFE) and that CerR regulated the cerecidin gene cluster directly by binding to the two predicted promoter regions of cerA and cerR DNase I footprinting experiments further confirmed that CerR specifically bound to the two promoter regions at a conserved inverted repeat sequence that was designated a CerR binding motif (cerR box). The present study demonstrated that CerR, as the first single-domain LuxR family transcriptional regulator, serves as a transcriptional activator in cerecidin biosynthesis and activates the cerecidin gene cluster, which was otherwise cryptic in B. cereusIMPORTANCE Lantibiotics with intriguing and prominent bioactivities are potential peptide antibiotics that could be applied in many areas, including food and pharmaceutical industries. The biosynthesis of lantibiotics is generally controlled by two-component regulatory systems consisting of histidine kinases and response regulators, while some unique and interesting regulatory systems are also revealed with the ever-increasing discovery of lantibiotic gene clusters among diverse microorganisms. Dissection of diverse lantibiotic regulation machineries would permit deep understanding of the biological functions of lantibiotics in different niches and even enable genetic activation of lantibiotic gene clusters that are otherwise cryptic. The significance of our study is to illuminate the regulatory mechanism of a special single-domain protein, CerR, in regulating cerecidin biosynthesis in Bacillus cereus, providing a possible novel approach to activate cryptic lantibiotic clusters.
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70
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Bingol EB, Akkaya E, Hampikyan H, Cetin O, Colak H. Effect of nisin-EDTA combinations and modified atmosphere packaging on the survival of Salmonellaenteritidis in Turkish type meatballs. CYTA - JOURNAL OF FOOD 2018. [DOI: 10.1080/19476337.2018.1523810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Enver Baris Bingol
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Istanbul University, Avcilar, Istanbul, Turkey
| | - Esra Akkaya
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Istanbul University, Avcilar, Istanbul, Turkey
| | - Hamparsun Hampikyan
- The School of Applied Sciences, Gastronomy and Culinary Arts, Beykent University, Buyukcekmece, Istanbul, Turkey
| | - Omer Cetin
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Istanbul University, Avcilar, Istanbul, Turkey
| | - Hilal Colak
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Istanbul University, Avcilar, Istanbul, Turkey
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71
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Frattaruolo L, Lacret R, Cappello AR, Truman AW. A Genomics-Based Approach Identifies a Thioviridamide-Like Compound with Selective Anticancer Activity. ACS Chem Biol 2017; 12:2815-2822. [PMID: 28968491 DOI: 10.1021/acschembio.7b00677] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Thioviridamide is a structurally novel ribosomally synthesized and post-translational modified peptide (RiPP) produced by Streptomyces olivoviridis NA005001. It is characterized by a structure that features a series of thioamide groups and possesses potent antiproliferative activity in cancer cell lines. Its unusual structure allied to its promise as an anticancer compound led us to investigate the diversity of thioviridamide-like pathways across sequenced bacterial genomes. We have isolated and characterized three diverse members of this family of natural products. This characterization is supported by transformation-associated recombination cloning and heterologous expression of one of these compounds, thiostreptamide S4. Our work provides an insight into the diversity of this rare class of compound and indicates that the unusual N-terminus of thioviridamide is not introduced biosynthetically but is instead introduced during acetone extraction. A detailed analysis of the biological activity of one of the newly discovered compounds, thioalbamide, indicates that it is highly cytotoxic to cancer cells, while exhibiting significantly less activity toward a noncancerous epithelial cell line.
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Affiliation(s)
- Luca Frattaruolo
- Department
of Molecular Microbiology, John Innes Centre, Colney Lane, Norwich, NR4 7UH, United Kingdom
- Department
of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Rodney Lacret
- Department
of Molecular Microbiology, John Innes Centre, Colney Lane, Norwich, NR4 7UH, United Kingdom
| | - Anna Rita Cappello
- Department
of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Andrew W. Truman
- Department
of Molecular Microbiology, John Innes Centre, Colney Lane, Norwich, NR4 7UH, United Kingdom
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72
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Phage display and selection of lanthipeptides on the carboxy-terminus of the gene-3 minor coat protein. Nat Commun 2017; 8:1500. [PMID: 29138389 PMCID: PMC5686179 DOI: 10.1038/s41467-017-01413-7] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 09/14/2017] [Indexed: 12/12/2022] Open
Abstract
Ribosomally synthesized and post-translationally modified peptides (RiPPs) are an emerging class of natural products with drug-like properties. To fully exploit the potential of RiPPs as peptide drug candidates, tools for their systematic engineering are required. Here we report the engineering of lanthipeptides, a subclass of RiPPs characterized by multiple thioether cycles that are enzymatically introduced in a regio- and stereospecific manner, by phage display. This was achieved by heterologous co-expression of linear lanthipeptide precursors fused to the widely neglected C-terminus of the bacteriophage M13 minor coat protein pIII, rather than the conventionally used N-terminus, along with the modifying enzymes from distantly related bacteria. We observe that C-terminal precursor peptide fusions to pIII are enzymatically modified in the cytoplasm of the producing cell and subsequently displayed as mature cyclic peptides on the phage surface. Biopanning of large C-terminal display libraries readily identifies artificial lanthipeptide ligands specific to urokinase plasminogen activator (uPA) and streptavidin. Lanthipeptides are a class of cyclic post-translationally modified peptides with potential drug-like properties. Here the authors develop a phage display system by expressing lanthipeptide precursors as C-terminal fusions to the phage M13 coat protein pIII in E. coli along with the heterologous modifying enzymes.
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73
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Park JE, Kim HR, Park SY, Choi SK, Park SH. Identification of the biosynthesis gene cluster for the novel lantibiotic paenilan fromPaenibacillus polymyxaE681 and characterization of its product. J Appl Microbiol 2017; 123:1133-1147. [DOI: 10.1111/jam.13580] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 07/12/2017] [Accepted: 08/21/2017] [Indexed: 12/26/2022]
Affiliation(s)
- J.-E. Park
- Infectious Disease Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Yuseong-gu Daejeon Korea
- Department of Biosystems and Bioengineering; KRIBB School of Biotechnology; Korea University of Science and Technology (UST); Yuseong-gu Daejeon Korea
| | - H.-R. Kim
- Infectious Disease Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Yuseong-gu Daejeon Korea
| | - S.-Y. Park
- Infectious Disease Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Yuseong-gu Daejeon Korea
| | - S.-K. Choi
- Infectious Disease Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Yuseong-gu Daejeon Korea
- Department of Biosystems and Bioengineering; KRIBB School of Biotechnology; Korea University of Science and Technology (UST); Yuseong-gu Daejeon Korea
| | - S.-H. Park
- Infectious Disease Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Yuseong-gu Daejeon Korea
- Department of Biosystems and Bioengineering; KRIBB School of Biotechnology; Korea University of Science and Technology (UST); Yuseong-gu Daejeon Korea
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74
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Bilitewski U, Blodgett JAV, Duhme-Klair AK, Dallavalle S, Laschat S, Routledge A, Schobert R. Chemical and Biological Aspects of Nutritional Immunity-Perspectives for New Anti-Infectives that Target Iron Uptake Systems. Angew Chem Int Ed Engl 2017; 56:14360-14382. [PMID: 28439959 DOI: 10.1002/anie.201701586] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Indexed: 12/22/2022]
Abstract
Upon bacterial infection, one of the defense mechanisms of the host is the withdrawal of essential metal ions, in particular iron, which leads to "nutritional immunity". However, bacteria have evolved strategies to overcome iron starvation, for example, by stealing iron from the host or other bacteria through specific iron chelators with high binding affinity. Fortunately, these complex interactions between the host and pathogen that lead to metal homeostasis provide several opportunities for interception and, thus, allow the development of novel antibacterial compounds. This Review focuses on iron, discusses recent highlights, and gives some future perspectives which are relevant in the fight against antibiotic resistance.
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Affiliation(s)
- Ursula Bilitewski
- AG Compound Profiling and Screening, Helmholtz Zentrum für Infektionsforschung, Inhoffenstrasse 7, 38124, Braunschweig, Germany
| | - Joshua A V Blodgett
- Department of Biology, Washington University, St. Louis, MO, 63130-4899, USA
| | | | - Sabrina Dallavalle
- Department of Food, Environmental and Nutritional Sciences, Università degli Studi di Milano, I-20133, Milano, Italy
| | - Sabine Laschat
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 7, 0569, Stuttgart, Germany
| | - Anne Routledge
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Rainer Schobert
- Organische Chemie I, Universität Bayreuth, Universitätsstrasse 30, 95447, Bayreuth, Germany
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75
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Bilitewski U, Blodgett JAV, Duhme-Klair AK, Dallavalle S, Laschat S, Routledge A, Schobert R. Chemische und biologische Aspekte von “Nutritional Immunity” - Perspektiven für neue Antiinfektiva mit Fokus auf bakterielle Eisenaufnahmesysteme. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701586] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ursula Bilitewski
- AG Compound Profiling and Screening; Helmholtz-Zentrum für Infektionsforschung; Inhoffenstraße 7 38124 Braunschweig Deutschland
| | | | | | - Sabrina Dallavalle
- Department of Food, Environmental and Nutritional Sciences; Università degli Studi di Milano; I-20133 Milano Italien
| | - Sabine Laschat
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55, 7 0569 Stuttgart Deutschland
| | - Anne Routledge
- Department of Chemistry; University of York, Heslington; York YO10 5DD Großbritannien
| | - Rainer Schobert
- Organische Chemie I; Universität Bayreuth; Universitätsstraße 30 95447 Bayreuth Deutschland
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76
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Gomes KM, Duarte RS, de Freire Bastos MDC. Lantibiotics produced by Actinobacteria and their potential applications (a review). MICROBIOLOGY-SGM 2017; 163:109-121. [PMID: 28270262 DOI: 10.1099/mic.0.000397] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The phylum Actinobacteria, which comprises a great variety of Gram-positive bacteria with a high G+C content in their genomes, is known for its large production of bioactive compounds, including those with antimicrobial activity. Among the antimicrobials, bacteriocins, ribosomally synthesized peptides, represent an important arsenal of potential new drugs to face the increasing prevalence of resistance to antibiotics among microbial pathogens. The actinobacterial bacteriocins form a heterogeneous group of substances that is difficult to adapt to most proposed classification schemes. However, recent updates have accommodated efficiently the diversity of bacteriocins produced by this phylum. Among the bacteriocins, the lantibiotics represent a source of new antimicrobials to control infections caused mainly by Gram-positive bacteria and with a low propensity for resistance development. Moreover, some of these compounds have additional biological properties, exhibiting activity against viruses and tumour cells and having also potential to be used in blood pressure or inflammation control and in pain relief. Thus, lantibiotics already described in Actinobacteria exhibit potential practical applications in medical settings, food industry and agriculture, with examples at different stages of pre-clinical and clinical trials.
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Affiliation(s)
- Karen Machado Gomes
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, UFRJ, Rio de Janeiro, Brazil
| | - Rafael Silva Duarte
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, UFRJ, Rio de Janeiro, Brazil
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77
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Lopes R, Cerdeira L, Tavares GS, Ruiz JC, Blom J, Horácio ECA, Mantovani HC, Queiroz MVD. Genome analysis reveals insights of the endophytic Bacillus toyonensis BAC3151 as a potentially novel agent for biocontrol of plant pathogens. World J Microbiol Biotechnol 2017; 33:185. [DOI: 10.1007/s11274-017-2347-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 09/19/2017] [Indexed: 02/02/2023]
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78
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Bartholomae M, Buivydas A, Viel JH, Montalbán-López M, Kuipers OP. Major gene-regulatory mechanisms operating in ribosomally synthesized and post-translationally modified peptide (RiPP) biosynthesis. Mol Microbiol 2017; 106:186-206. [DOI: 10.1111/mmi.13764] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 08/02/2017] [Accepted: 08/03/2017] [Indexed: 02/06/2023]
Affiliation(s)
- Maike Bartholomae
- Department of Molecular Genetics; University of Groningen, Nijenborgh 7; 9747AG Groningen The Netherlands
| | - Andrius Buivydas
- Department of Molecular Genetics; University of Groningen, Nijenborgh 7; 9747AG Groningen The Netherlands
| | - Jakob H. Viel
- Department of Molecular Genetics; University of Groningen, Nijenborgh 7; 9747AG Groningen The Netherlands
| | - Manuel Montalbán-López
- Department of Microbiology; University of Granada, C. Fuentenueva s/n; 18071 Granada Spain
| | - Oscar P. Kuipers
- Department of Molecular Genetics; University of Groningen, Nijenborgh 7; 9747AG Groningen The Netherlands
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79
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Hatziioanou D, Gherghisan-Filip C, Saalbach G, Horn N, Wegmann U, Duncan SH, Flint HJ, Mayer MJ, Narbad A. Discovery of a novel lantibiotic nisin O from Blautia obeum A2-162, isolated from the human gastrointestinal tract. MICROBIOLOGY-SGM 2017; 163:1292-1305. [PMID: 28857034 DOI: 10.1099/mic.0.000515] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A novel lanC-like sequence was identified from the dominant human gut bacterium Blautia obeum strain A2-162. This sequence was extended to reveal a putative lantibiotic operon with biosynthetic and transport genes, two sets of regulatory genes, immunity genes, three identical copies of a nisin-like lanA gene with an unusual leader peptide, and a fourth putative lanA gene. Comparison with other nisin clusters showed that the closest relationship was to nisin U. B. obeum A2-162 demonstrated antimicrobial activity against Clostridium perfringens when grown on solid medium in the presence of trypsin. Fusions of predicted nsoA structural sequences with the nisin A leader were expressed in Lactococcus lactis containing the nisin A operon without nisA. Expression of the nisA leader sequence fused to the predicted structural nsoA1 produced a growth defect in L. lactis that was dependent upon the presence of biosynthetic genes, but failed to produce antimicrobial activity. Insertion of the nso cluster into L. lactis MG1614 gave an increased immunity to nisin A, but this was not replicated by the expression of nsoI. Nisin A induction of L. lactis containing the nso cluster and nisRK genes allowed detection of the NsoA1 pre-peptide by Western hybridization. When this heterologous producer was grown with nisin induction on solid medium, antimicrobial activity was demonstrated in the presence of trypsin against C. perfringens, Clostridium difficile and L. lactis. This research adds to evidence that lantibiotic production may be an important trait of gut bacteria and could lead to the development of novel treatments for intestinal diseases.
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Affiliation(s)
- Diane Hatziioanou
- Gut Health and Food Safety Institute Strategic Programme, Quadram Institute Bioscience, Colney, Norwich, NR4 7UA, UK
| | - Cristina Gherghisan-Filip
- Gut Health and Food Safety Institute Strategic Programme, Quadram Institute Bioscience, Colney, Norwich, NR4 7UA, UK
| | | | - Nikki Horn
- Gut Health and Food Safety Institute Strategic Programme, Quadram Institute Bioscience, Colney, Norwich, NR4 7UA, UK
| | - Udo Wegmann
- Gut Health and Food Safety Institute Strategic Programme, Quadram Institute Bioscience, Colney, Norwich, NR4 7UA, UK
| | - Sylvia H Duncan
- Gut Health Group, Rowett Institute, University of Aberdeen, Foresterhill, Aberdeen, UK
| | - Harry J Flint
- Gut Health Group, Rowett Institute, University of Aberdeen, Foresterhill, Aberdeen, UK
| | - Melinda J Mayer
- Gut Health and Food Safety Institute Strategic Programme, Quadram Institute Bioscience, Colney, Norwich, NR4 7UA, UK
| | - Arjan Narbad
- Gut Health and Food Safety Institute Strategic Programme, Quadram Institute Bioscience, Colney, Norwich, NR4 7UA, UK
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80
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Dong B, Yi Y, Liang L, Shi Q. High Throughput Identification of Antimicrobial Peptides from Fish Gastrointestinal Microbiota. Toxins (Basel) 2017; 9:toxins9090266. [PMID: 28867788 PMCID: PMC5618199 DOI: 10.3390/toxins9090266] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 08/25/2017] [Accepted: 08/28/2017] [Indexed: 12/22/2022] Open
Abstract
Antimicrobial peptides (AMPs) are a group of small peptides, which are secreted by almost all creatures in nature. They have been explored in therapeutic and agricultural aspects as they are toxic to many bacteria. A considerable amount of work has been conducted in analyzing 16S and metagenomics of the gastrointestinal (GI) microbiome of grass carp (Ctenopharyngodon idellus). However, these datasets are still untapped resources. In this present study, a homologous search was performed to predict AMPs from our newly generated metagenome of grass carp. We identified five AMPs with high similarities to previously reported bacterial toxins, such as lantibiotic and class II bacteriocins. In addition, we observed that the top abundant genus in the GI microbiota of the grass carp was generally consistent with the putative AMP-producing strains, which are mainly from Lactobacillales. Furthermore, we constructed the phylogenetic relationship of these putative AMP-producing bacteria existing in the GI of grass carp and some popular commercial probiotics (commonly used for microecologics), demonstrating that they are closely related. Thus, these strains have the potential to be developed into novel microecologics. In a word, we provide a high-throughput way to discover AMPs from fish GI microbiota, which can be developed as alternative pathogen antagonists (toxins) for microecologics or probiotic supplements.
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Affiliation(s)
- Bo Dong
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen 518083, China.
| | - Yunhai Yi
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen 518083, China.
- Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen 518083, China.
| | - Lifeng Liang
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen 518083, China.
| | - Qiong Shi
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen 518083, China.
- Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen 518083, China.
- Laboratory of Aquatic Genomics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China.
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81
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Reiners J, Lagedroste M, Ehlen K, Leusch S, Zaschke-Kriesche J, Smits SHJ. The N-terminal Region of Nisin Is Important for the BceAB-Type ABC Transporter NsrFP from Streptococcus agalactiae COH1. Front Microbiol 2017; 8:1643. [PMID: 28912758 PMCID: PMC5583591 DOI: 10.3389/fmicb.2017.01643] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 08/15/2017] [Indexed: 11/13/2022] Open
Abstract
Lantibiotics are (methyl)-lanthionine-containing antimicrobial peptides produced by several Gram-positive bacteria. Some human pathogenic bacteria express specific resistance proteins that counteract this antimicrobial activity of lantibiotics. In Streptococcus agalactiae COH1 resistance against the well-known lantibiotic nisin is conferred by, the nisin resistance protein (NSR), a two-component system (NsrRK) and a BceAB-type ATP-binding cassette (ABC) transporter (NsrFP). The present study focuses on elucidating the function of NsrFP via its heterologous expression in Lactococcus lactis. NsrFP is able to confer a 16-fold resistance against wild type nisin as determined by growth inhibition experiments and functions as a lantibiotic exporter. Several C-terminal nisin mutants indicated that NsrFP recognizes the N-terminal region of nisin. The N-terminus harbors three (methyl)-lanthionine rings, which are conserved in other lantibiotics.
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Affiliation(s)
- Jens Reiners
- Institute of Biochemistry, Heinrich Heine University DüsseldorfDüsseldorf, Germany
| | - Marcel Lagedroste
- Institute of Biochemistry, Heinrich Heine University DüsseldorfDüsseldorf, Germany
| | - Katja Ehlen
- Institute of Biochemistry, Heinrich Heine University DüsseldorfDüsseldorf, Germany
| | - Selina Leusch
- Institute of Biochemistry, Heinrich Heine University DüsseldorfDüsseldorf, Germany
| | | | - Sander H J Smits
- Institute of Biochemistry, Heinrich Heine University DüsseldorfDüsseldorf, Germany
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82
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Manzor K, Proinsias KÓ, Kelleher F. Solid-phase peptide synthesis of analogues of the N -terminus A-ring fragment of the lantibiotic nisin: Replacements for the dehydroalanine (Dha) residue at position 5 and the first incorporation of a thioamide residue. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.06.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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83
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Carboxyl Analogue of Mutacin 1140, a Scaffold for Lead Antibacterial Discovery. Appl Environ Microbiol 2017; 83:AEM.00668-17. [PMID: 28500042 DOI: 10.1128/aem.00668-17] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Accepted: 05/01/2017] [Indexed: 11/20/2022] Open
Abstract
Mutacin 1140 belongs to the epidermin group of lantibiotics. Epidermin class lantibiotics are ribosomally synthesized and posttranslationally modified antibiotics with potent activity against Gram-positive bacteria. In particular, this class is effective at targeting drug-resistant Streptococcus pneumoniae, methicillin-resistant Staphylococcus aureus (MRSA), Mycobacterium tuberculosis, and Clostridium difficile A C-terminal S-[(Z)-2-aminovinyl]-d-cysteine (AviCys) residue is derived from a decarboxylation of a terminal cysteine that is involved in lanthionine ring formation. Studies on mutacin 1140 have revealed new insight into the structural importance of the C-terminal AviCys residue. A C-terminal carboxyl analogue of mutacin 1140 was engineered. Capping the C-terminal carboxyl group with a primary amine restores bioactivity and affords a novel opportunity to synthesize new analogues. A C-terminal fluorescein-labeled mutacin 1140 analogue traps lipid II into a large lipid II lantibiotic complex, similar to that observed in vivo for the lantibiotic nisin. A C-terminal carboxyl analogue of mutacin 1140 competitively inhibits the activity of native mutacin 1140 and nisin. The presence of a C-terminal carboxyl group prevents the formation of the large lipid II lantibiotic complexes but does not prevent the binding of the lantibiotic to lipid II.IMPORTANCE This study addressed the importance of the C-terminal S-[(Z)-2-aminovinyl]-d-cysteine (AviCys) residue for antibacterial activity. We have learned that the posttranslational modification for making the AviCys residue is presumably important for the lateral assembly mechanism of activity that traps lipid II into a large complex. The C-terminal carboxyl analogue of this class of lantibiotics is agreeable to the addition of a wide variety of substrates. The addition of fluorescein enabled in vivo visualization of the epidermin class of lantibiotics in action. These results are significant because, as we demonstrate, the presence of the AviCys residue is not essential for bioactivity, but, more importantly, the removal of the carboxyl group is essential. The ability to make a C-terminal carboxyl analogue that is modifiable will facilitate the synthesis of novel analogues of the epidermin class of lantibiotics that can be developed for new applications.
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84
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Lewis BB, Pamer EG. Microbiota-Based Therapies for Clostridium difficile and Antibiotic-Resistant Enteric Infections. Annu Rev Microbiol 2017; 71:157-178. [PMID: 28617651 DOI: 10.1146/annurev-micro-090816-093549] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Bacterial pathogens are increasingly antibiotic resistant, and development of clinically effective antibiotics is lagging. Curing infections increasingly requires antimicrobials that are broader spectrum, more toxic, and more expensive, and mortality attributable to antibiotic-resistant pathogens is rising. The commensal microbiota, comprising microbes that colonize the mammalian gastrointestinal tract, can provide high levels of resistance to infection, and the contributions of specific bacterial species to resistance are being discovered and characterized. Microbiota-mediated mechanisms of colonization resistance and pathogen clearance include bactericidal activity, nutrient depletion, immune activation, and manipulation of the gut's chemical environment. Current research is focusing on development of microbiota-based therapies to reduce intestinal colonization with antibiotic-resistant pathogens, with the goal of reducing pathogen transmission and systemic dissemination.
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Affiliation(s)
- Brittany B Lewis
- Infectious Diseases Service, Immunology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065; ,
| | - Eric G Pamer
- Infectious Diseases Service, Immunology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065; ,
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85
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García-Cayuela T, Requena T, Martínez-Cuesta MC, Peláez C. Rapid detection of Lactococcuslactis isolates producing the lantibiotics nisin, lacticin 481 and lacticin 3147 using MALDI-TOF MS. J Microbiol Methods 2017; 139:138-142. [PMID: 28583849 DOI: 10.1016/j.mimet.2017.06.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 05/29/2017] [Accepted: 06/01/2017] [Indexed: 01/17/2023]
Abstract
The aim of the study was to evaluate the potential use of Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS) for fast and reliable detection of strains producing the lantibiotics nisin, lacticin 481 and lacticin 3147 in a large collection of lactococci. A total of one hundred lactococcal isolates from traditional ewe's and goat's raw milk cheeses were identified to the species level as Lactococcuslactis by MALDI-TOF MS based on comparison with lactococcal entries in the BioTyper database. Mass spectra in the range 2000-4000Da of the identified isolates were compared to reference spectra of three lactococcal strains producing lacticin 481 (IFPL 330), lacticin 3147 (IFPL 105) and nisin (IFPL 503). Only eight isolates had mass spectra with peaks that could be unequivocally identified as lacticin 481 (2900.47Da) or nisin (3330.31Da). None of the assayed isolates matched the mass spectra corresponding to the two-peptide lacticin 3147 (2847.97 and 3306.29Da). The results obtained by MALDI-TOF MS were genetically validated by amplification of the corresponding structural gene coding for lacticin 481, nisin and lacticin 3147. MALDI-TOF MS can be used as a fast and reliable technique to screen a large number of lactococcal isolates for the ability to produce the lantibiotics nisin, lacticin 481 and lacticin 3147.
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Affiliation(s)
- Tomás García-Cayuela
- Departamento de Biotecnología y Microbiología de Alimentos, Instituto de Investigación en Ciencias de la Alimentación CIAL (CSIC), Madrid, Spain.
| | - Teresa Requena
- Departamento de Biotecnología y Microbiología de Alimentos, Instituto de Investigación en Ciencias de la Alimentación CIAL (CSIC), Madrid, Spain
| | - M Carmen Martínez-Cuesta
- Departamento de Biotecnología y Microbiología de Alimentos, Instituto de Investigación en Ciencias de la Alimentación CIAL (CSIC), Madrid, Spain
| | - Carmen Peláez
- Departamento de Biotecnología y Microbiología de Alimentos, Instituto de Investigación en Ciencias de la Alimentación CIAL (CSIC), Madrid, Spain
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86
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Carlin Fagundes P, Nascimento de Sousa Santos I, Silva Francisco M, Mattos Albano R, de Freire Bastos MDC. Genetic and biochemical characterization of hyicin 3682, the first bacteriocin reported for Staphylococcus hyicus. Microbiol Res 2017; 198:36-46. [DOI: 10.1016/j.micres.2017.02.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 02/05/2017] [Accepted: 02/09/2017] [Indexed: 10/20/2022]
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87
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Baumann T, Nickling JH, Bartholomae M, Buivydas A, Kuipers OP, Budisa N. Prospects of In vivo Incorporation of Non-canonical Amino Acids for the Chemical Diversification of Antimicrobial Peptides. Front Microbiol 2017; 8:124. [PMID: 28210246 PMCID: PMC5288337 DOI: 10.3389/fmicb.2017.00124] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 01/18/2017] [Indexed: 12/14/2022] Open
Abstract
The incorporation of non-canonical amino acids (ncAA) is an elegant way for the chemical diversification of recombinantly produced antimicrobial peptides (AMPs). Residue- and site-specific installation methods in several bacterial production hosts hold great promise for the generation of new-to-nature AMPs, and can contribute to tackle the ongoing emergence of antibiotic resistance in pathogens. Especially from a pharmacological point of view, desirable improvements span pH and protease resistance, solubility, oral availability and circulation half-life. Although the primary focus of this report is on ribosomally synthesized and post-translationally modified peptides (RiPPs), we have included selected cases of peptides produced by solid phase peptide synthesis to comparatively show the potential and impact of ncAA introduction. Generally speaking, the introduction of ncAAs in recombinant AMPs delivers novel levels of chemical diversification. Cotranslationally incorporated, they can take part in AMP biogenesis either through direction interaction with elements of the post-translational modification (PTM) machinery or as untargeted sites with unique physicochemical properties and chemical handles for further modification. Together with genetic libraries, genome mining and processing by PTM machineries, ncAAs present not a mere addition to this process, but a highly diverse pool of building blocks to significantly broaden the chemical space of this valuable class of molecules. This perspective summarizes new developments of ncAA containing peptides. Challenges to be resolved in order to reach large-scale pharmaceutical production of these promising compounds and prospects for future developments are discussed.
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Affiliation(s)
- Tobias Baumann
- Biocatalysis Group, Department of Chemistry, Technische Universität Berlin (Berlin Institute of Technology) Berlin, Germany
| | - Jessica H Nickling
- Biocatalysis Group, Department of Chemistry, Technische Universität Berlin (Berlin Institute of Technology) Berlin, Germany
| | - Maike Bartholomae
- Molecular Genetics Group, Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, Rijksuniversiteit Groningen (University of Groningen) Groningen, Netherlands
| | - Andrius Buivydas
- Molecular Genetics Group, Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, Rijksuniversiteit Groningen (University of Groningen) Groningen, Netherlands
| | - Oscar P Kuipers
- Molecular Genetics Group, Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, Rijksuniversiteit Groningen (University of Groningen) Groningen, Netherlands
| | - Nediljko Budisa
- Biocatalysis Group, Department of Chemistry, Technische Universität Berlin (Berlin Institute of Technology) Berlin, Germany
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88
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Ongey EL, Yassi H, Pflugmacher S, Neubauer P. Pharmacological and pharmacokinetic properties of lanthipeptides undergoing clinical studies. Biotechnol Lett 2017; 39:473-482. [PMID: 28044226 DOI: 10.1007/s10529-016-2279-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Accepted: 12/20/2016] [Indexed: 11/29/2022]
Abstract
The intrinsic qualities of lanthipeptides for their use as therapeutic drugs present several challenges because of their properties, which include stability, solubility and bioavailability, which, under physiological conditions, are very low. Researches have encouraged clinical evaluation of a few compounds, such as mutacin 1140, microbisporicin, actagardine and duramycin, with pharmacokinetic profiles showing rapid distribution and elimination rates, good bioavailability and fecal excretion, as well as high protein binding. Local and parenteral administration are currently suitable to minimize environmental influences on lanthipeptides and ensure efficient activity. Nevertheless, valuable improvements on pharmacodynamic and pharmacokinetic properties may also permit systemic applications via enteral routes. Understanding how rational modifications influence the desired pharmacological and pharmacokinetic properties of these biomolecules would help to answer some specific questions about their susceptibility to environmental changes, mechanism of action and how to engineer other peptides of the same group to improve their clinical relevance.
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Affiliation(s)
- Elvis Legala Ongey
- Chair of Bioprocess Engineering, Department of Biotechnology, Technische Universität Berlin, Ackerstraße 76, ACK24, 13355, Berlin, Germany. .,Department of Biotechnology, Technische Universität Berlin, Ackerstraße 76, ACK24, 13355, Berlin, Germany.
| | - Hüseyin Yassi
- Chair of Bioprocess Engineering, Department of Biotechnology, Technische Universität Berlin, Ackerstraße 76, ACK24, 13355, Berlin, Germany
| | - Stephan Pflugmacher
- Department Ecological Impact Research and Ecotoxicology, Institute of Ecology, Berlin Institute of Technology (BIT), 10538, Berlin, Germany
| | - Peter Neubauer
- Chair of Bioprocess Engineering, Department of Biotechnology, Technische Universität Berlin, Ackerstraße 76, ACK24, 13355, Berlin, Germany
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89
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Murphy D, Ricci A, Auce Z, Beechinor JG, Bergendahl H, Breathnach R, Bureš J, Duarte Da Silva JP, Hederová J, Hekman P, Ibrahim C, Kozhuharov E, Kulcsár G, Lander Persson E, Lenhardsson JM, Mačiulskis P, Malemis I, Markus-Cizelj L, Michaelidou-Patsia A, Nevalainen M, Pasquali P, Rouby JC, Schefferlie J, Schlumbohm W, Schmit M, Spiteri S, Srčič S, Taban L, Tiirats T, Urbain B, Vestergaard EM, Wachnik-Święcicka A, Weeks J, Zemann B, Allende A, Bolton D, Chemaly M, Fernandez Escamez PS, Girones R, Herman L, Koutsoumanis K, Lindqvist R, Nørrung B, Robertson L, Ru G, Sanaa M, Simmons M, Skandamis P, Snary E, Speybroeck N, Ter Kuile B, Wahlström H, Baptiste K, Catry B, Cocconcelli PS, Davies R, Ducrot C, Friis C, Jungersen G, More S, Muñoz Madero C, Sanders P, Bos M, Kunsagi Z, Torren Edo J, Brozzi R, Candiani D, Guerra B, Liebana E, Stella P, Threlfall J, Jukes H. EMA and EFSA Joint Scientific Opinion on measures to reduce the need to use antimicrobial agents in animal husbandry in the European Union, and the resulting impacts on food safety (RONAFA). EFSA J 2017; 15:e04666. [PMID: 32625259 PMCID: PMC7010070 DOI: 10.2903/j.efsa.2017.4666] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
EFSA and EMA have jointly reviewed measures taken in the EU to reduce the need for and use of antimicrobials in food-producing animals, and the resultant impacts on antimicrobial resistance (AMR). Reduction strategies have been implemented successfully in some Member States. Such strategies include national reduction targets, benchmarking of antimicrobial use, controls on prescribing and restrictions on use of specific critically important antimicrobials, together with improvements to animal husbandry and disease prevention and control measures. Due to the multiplicity of factors contributing to AMR, the impact of any single measure is difficult to quantify, although there is evidence of an association between reduction in antimicrobial use and reduced AMR. To minimise antimicrobial use, a multifaceted integrated approach should be implemented, adapted to local circumstances. Recommended options (non-prioritised) include: development of national strategies; harmonised systems for monitoring antimicrobial use and AMR development; establishing national targets for antimicrobial use reduction; use of on-farm health plans; increasing the responsibility of veterinarians for antimicrobial prescribing; training, education and raising public awareness; increasing the availability of rapid and reliable diagnostics; improving husbandry and management procedures for disease prevention and control; rethinking livestock production systems to reduce inherent disease risk. A limited number of studies provide robust evidence of alternatives to antimicrobials that positively influence health parameters. Possible alternatives include probiotics and prebiotics, competitive exclusion, bacteriophages, immunomodulators, organic acids and teat sealants. Development of a legislative framework that permits the use of specific products as alternatives should be considered. Further research to evaluate the potential of alternative farming systems on reducing AMR is also recommended. Animals suffering from bacterial infections should only be treated with antimicrobials based on veterinary diagnosis and prescription. Options should be reviewed to phase out most preventive use of antimicrobials and to reduce and refine metaphylaxis by applying recognised alternative measures.
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90
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Wang J, Ge X, Zhang L, Teng K, Zhong J. One-pot synthesis of class II lanthipeptide bovicin HJ50 via an engineered lanthipeptide synthetase. Sci Rep 2016; 6:38630. [PMID: 27924934 PMCID: PMC5141572 DOI: 10.1038/srep38630] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 05/17/2016] [Indexed: 02/08/2023] Open
Abstract
Lanthipeptides are a large class of bacteria-produced, ribosomally-synthesized and post-translationally modified peptides. They are recognized as peptide antibiotics because most of them exhibit potent antimicrobial activities against Gram-positive bacteria especially those that are phylogenetically related to producers. Maturation of class II lanthipeptide like bovicin HJ50 undergoes precursor modification by LanM and a subsequent leader peptide cleavage by LanT. Herein, via co-expression of precursor gene bovA, modification gene bovM and transporter gene bovT in Escherichia coli C43 (DE3), bioactive bovicin HJ50 was successfully produced and secreted. To further achieve in vitro one-pot synthesis of bovicin HJ50, an engineered bovicin HJ50 synthetase BovT150M was obtained by fusing the peptidase domain of BovT (BovT150) to the N-terminus of BovM. BovT150M exhibited dual functions of precursor modification and leader peptide cleavage to release mature bovicin HJ50. Under the guidance of BovA leader peptide, BovT150M exhibited substrate tolerance to modify non-native substrates including suicin and lacticin 481. This work exemplifies the feasibility of enzyme chimera of peptidase domain (LanT150) and modification enzyme (LanM) as a one-pot lanthipeptide synthetase.
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Affiliation(s)
- Jian Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100039, P. R. China
| | - Xiaoxuan Ge
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100039, P. R. China
| | - Li Zhang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100039, P. R. China
| | - Kunling Teng
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, P. R. China
| | - Jin Zhong
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100039, P. R. China
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91
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Elsayed KM, Islam MR, Abdullah-Al-Mahin, Nagao JI, Zendo T, Sonomoto K. LiaRS reporter assay: A simple tool to identify lipid II binding moieties in lantibiotic nukacin ISK-1. J Biosci Bioeng 2016; 123:398-401. [PMID: 27856233 DOI: 10.1016/j.jbiosc.2016.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/08/2016] [Accepted: 10/01/2016] [Indexed: 12/27/2022]
Abstract
Binding to lipid II is an important step in the mode of action of most lantibiotics targeting the bacterial cell wall. We applied the Bacillus subtilis two-component system, LiaRS, that is known to respond to antibiotics interfering with lipid II cycle, in order to evaluate lipid II binding activity of known bacteriocins and also to identify lipid II binding moieties in lantibiotic nukacin ISK-1. Using this method, we confirmed that the methyllanthionine ring in nukacin ISK-1 is crucial for lipid II binding as previously indicated. In this study, we further identified that the three N-terminal lysine residues (K1, K2, and K3) and the glycine (G5) residue in nukacin ISK-1 are also important in lipid II binding.
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Affiliation(s)
- Khaled M Elsayed
- Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Mohammad R Islam
- Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan; Department of Biochemistry and Molecular Biology, Faculty of Biological Sciences, University of Dhaka, Dhaka 1000, Bangladesh
| | - Abdullah-Al-Mahin
- Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan; Microbiology and Industrial Irradiation Division, Institute of Food and Radiation Biology, Atomic Energy Research Establishment, Savar, Dhaka 1349, Bangladesh
| | - Jun-Ichi Nagao
- Section of Infection Biology, Department of Functional Bioscience, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 814-0913, Japan
| | - Takeshi Zendo
- Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Kenji Sonomoto
- Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan.
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92
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van Heel AJ, Kloosterman TG, Montalban-Lopez M, Deng J, Plat A, Baudu B, Hendriks D, Moll GN, Kuipers OP. Discovery, Production and Modification of Five Novel Lantibiotics Using the Promiscuous Nisin Modification Machinery. ACS Synth Biol 2016; 5:1146-1154. [PMID: 27294279 DOI: 10.1021/acssynbio.6b00033] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
To find the right conditions to isolate natively expressed antimicrobial peptides from a wide range of different microorganisms can be a challenge. Here, we exploited a heterologous expression system to produce and characterize several novel lantibiotics. We identified 54 novel putative class I and class II lantibiotics after inspecting all publicly available prokaryotic genomes using the in-house developed mining tool BAGEL3. The genes encoding these new lantibiotics fused to the nisin leader peptide gene sequence were synthesized, and the constructs were plugged into the nisin expression and modification system. Using this approach 30 peptides could be expressed, 27 of which were dehydrated by NisBC on at least 1 predicted position. Good antimicrobial activity against several pathogenic bacteria could be demonstrated for 5 novel heterologously modified lantibiotics. Lantibiotics from Corynebacterium lipophiloflavum DSM 44291 and Streptococcus agalactiae ATCC 13813, named flavucin and agalacticin, respectively, were fully modified and displayed high antimicrobial activity. The efficiency of functional expression was significantly enhanced when we made use of the native nisin leader cleavage site, instead of an artificial factor Xa site. Thus, we describe an efficient way for heterologous production of active lantibiotics, facilitating a rapid identification of promising molecules.
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Affiliation(s)
- Auke J. van Heel
- University of Groningen, Linnaeusborg, Nijenborgh
7, 9747AG Groningen, The Netherlands
| | - Tomas G. Kloosterman
- University of Groningen, Linnaeusborg, Nijenborgh
7, 9747AG Groningen, The Netherlands
| | | | - Jingjing Deng
- University of Groningen, Linnaeusborg, Nijenborgh
7, 9747AG Groningen, The Netherlands
| | - Annechien Plat
- University of Groningen, Linnaeusborg, Nijenborgh
7, 9747AG Groningen, The Netherlands
| | - Baptiste Baudu
- University of Groningen, Linnaeusborg, Nijenborgh
7, 9747AG Groningen, The Netherlands
| | - Djoke Hendriks
- University of Groningen, Linnaeusborg, Nijenborgh
7, 9747AG Groningen, The Netherlands
| | - Gert N. Moll
- University of Groningen, Linnaeusborg, Nijenborgh
7, 9747AG Groningen, The Netherlands
| | - Oscar P. Kuipers
- University of Groningen, Linnaeusborg, Nijenborgh
7, 9747AG Groningen, The Netherlands
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93
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Montalbán-López M, van Heel AJ, Kuipers OP. Employing the promiscuity of lantibiotic biosynthetic machineries to produce novel antimicrobials. FEMS Microbiol Rev 2016; 41:5-18. [PMID: 27591436 DOI: 10.1093/femsre/fuw034] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 03/07/2016] [Accepted: 07/28/2016] [Indexed: 12/30/2022] Open
Abstract
As the number of new antibiotics that reach the market is decreasing and the demand for them is rising, alternative sources of novel antimicrobials are needed. Lantibiotics are potent peptide antimicrobials that are ribosomally synthesized and stabilized by post-translationally introduced lanthionine rings. Their ribosomal synthesis and enzymatic modifications provide excellent opportunities to design and engineer a large variety of novel antimicrobial compounds. The research conducted in this area demonstrates that the modularity present in both the peptidic rings as well as in the combination of promiscuous modification enzymes can be exploited to further increase the diversity of lantibiotics. Various approaches, where the modifying enzymes and corresponding leader peptides are decoupled from their natural core peptide and integrated in designed plug-and-play production systems, enable the production of modified peptides that are either derived from vast genomic data or designed using functional parts from a wide diversity of core peptides. These approaches constitute a powerful discovery platform to develop novel antimicrobials with high therapeutic potential.
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Affiliation(s)
- Manuel Montalbán-López
- Department of Molecular Genetics, University of Groningen, Nijenborgh 7, 9747AG Groningen, the Netherlands
| | - Auke J van Heel
- Department of Molecular Genetics, University of Groningen, Nijenborgh 7, 9747AG Groningen, the Netherlands
| | - Oscar P Kuipers
- Department of Molecular Genetics, University of Groningen, Nijenborgh 7, 9747AG Groningen, the Netherlands
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94
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Rai R, Kaur B, Singh S, Di Falco M, Tsang A, Chadha BS. Evaluation of secretome of highly efficient lignocellulolytic Penicillium sp. Dal 5 isolated from rhizosphere of conifers. BIORESOURCE TECHNOLOGY 2016; 216:958-67. [PMID: 27341464 DOI: 10.1016/j.biortech.2016.06.040] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 06/04/2016] [Accepted: 06/06/2016] [Indexed: 05/23/2023]
Abstract
Penicillium sp. (Dal 5) isolated from rhizosphere of conifers from Dalhousie (Himachal Pradesh, India) was found to be an efficient cellulolytic strain. The culture under shake flask on CWR (cellulose, wheat bran and rice straw) medium produced appreciably higher levels of endoglucanase (35.69U/ml), β-glucosidase (4.20U/ml), cellobiohydrolase (2.86U/ml), FPase (1.2U/ml) and xylanase (115U/ml) compared to other Penicillium strains reported in literature. The mass spectroscopy analysis of Penicillium sp. Dal 5 secretome identified 108 proteins constituting an array of CAZymes including glycosyl hydrolases (GH) belonging to 24 different families, polysaccharide lyases (PL), carbohydrate esterases (CE), lytic polysaccharide mono-oxygenases (LPMO) in addition to swollenin and a variety of carbohydrate binding modules (CBM) indicating an elaborate genetic potential of this strain for hydrolysis of lignocellulosics. Further, the culture extract was evaluated for hydrolysis of alkali treated rice straw, wheat straw, bagasse and corn cob at 10% substrate loading rate.
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Affiliation(s)
- Rohit Rai
- Department of Microbiology, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Baljit Kaur
- Department of Microbiology, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Surender Singh
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Macros Di Falco
- Centre for Structural and Functional Genomics, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec H4B 1R6, Canada
| | - Adrian Tsang
- Centre for Structural and Functional Genomics, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec H4B 1R6, Canada
| | - B S Chadha
- Department of Microbiology, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
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95
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Xin B, Zheng J, Liu H, Li J, Ruan L, Peng D, Sajid M, Sun M. Thusin, a Novel Two-Component Lantibiotic with Potent Antimicrobial Activity against Several Gram-Positive Pathogens. Front Microbiol 2016; 7:1115. [PMID: 27486447 PMCID: PMC4949975 DOI: 10.3389/fmicb.2016.01115] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 07/04/2016] [Indexed: 12/28/2022] Open
Abstract
Due to the rapidly increasing prevalence of multidrug-resistant bacterial strains, the need for new antimicrobial drugs to treat infections has become urgent. Bacteriocins, which are antimicrobial peptides of bacterial origin, are considered potential alternatives to conventional antibiotics and have attracted widespread attention in recent years. Among these bacteriocins, lantibiotics, especially two-component lantibiotics, exhibit potent antimicrobial activity against some clinically relevant Gram-positive pathogens and have potential applications in the pharmaceutical industry. In this study, we characterized a novel two-component lantibiotic termed thusin that consists of Thsα, Thsβ, and Thsβ' (mutation of Thsβ, A14G) and that was isolated from a B. thuringiensis strain BGSC 4BT1. Thsα and Thsβ (or Thsβ') exhibit optimal antimicrobial activity at a 1:1 ratio and act sequentially to affect target cells, and they are all highly thermostable (100°C for 30 min) and pH tolerant (pH 2.0 to 9.0). Thusin shows remarkable efficacy against all tested Gram-positive bacteria and greater activities than two known lantibiotics thuricin 4A-4 and ticin A4, and one antibiotic vancomycin against various bacterial pathogens (Bacillus cereus, Listeria monocytogenes, Staphylococcus aureus (MRSA), Staphylococcus sciuri, Enterococcus faecalis, and Streptococcus pneumoniae). Moreover, thusin is also able to inhibit the outgrowth of B. cereus spores. The potent antimicrobial activity of thusin against some Gram-positive pathogens indicates that it has potential for the development of new drugs.
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Affiliation(s)
- Bingyue Xin
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Jinshui Zheng
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Hualin Liu
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Junhua Li
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Lifang Ruan
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Donghai Peng
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Muhammad Sajid
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Ming Sun
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University Wuhan, China
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96
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Ongey EL, Neubauer P. Lanthipeptides: chemical synthesis versus in vivo biosynthesis as tools for pharmaceutical production. Microb Cell Fact 2016; 15:97. [PMID: 27267232 PMCID: PMC4897893 DOI: 10.1186/s12934-016-0502-y] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 06/01/2016] [Indexed: 01/15/2023] Open
Abstract
Lanthipeptides (also called lantibiotics for those with antibacterial activities) are ribosomally synthesized post-translationally modified peptides having thioether cross-linked amino acids, lanthionines, as a structural element. Lanthipeptides have conceivable potentials to be used as therapeutics, however, the lack of stable, high-yield, well-characterized processes for their sustainable production limit their availability for clinical studies and further pharmaceutical commercialization. Though many reviews have discussed the various techniques that are currently employed to produce lanthipeptides, a direct comparison between these methods to assess industrial applicability has not yet been described. In this review we provide a synoptic comparison of research efforts on total synthesis and in vivo biosynthesis aimed at fostering lanthipeptides production. We further examine current applications and propose measures to enhance product yields. Owing to their elaborate chemical structures, chemical synthesis of these biomolecules is economically less feasible for large-scale applications, and hence biological production seems to be the only realistic alternative.
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Affiliation(s)
- Elvis Legala Ongey
- Chair of Bioprocess Engineering, Department of Biotechnology, Technische Universität Berlin, Ackerstraße 76, ACK24, 13355, Berlin, Germany.
| | - Peter Neubauer
- Chair of Bioprocess Engineering, Department of Biotechnology, Technische Universität Berlin, Ackerstraße 76, ACK24, 13355, Berlin, Germany
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97
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Antibacterial activity of the novel semisynthetic lantibiotic NVB333 in vitro and in experimental infection models. J Antibiot (Tokyo) 2016; 69:850-857. [PMID: 27189121 DOI: 10.1038/ja.2016.47] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 02/26/2016] [Accepted: 04/03/2016] [Indexed: 12/19/2022]
Abstract
NVB333 is a novel semisynthetic lantibiotic derived from the amide coupling of 3,5-dichlorobenzylamine to the C-terminal of deoxyactagardine B. The in vitro activity of NVB333 includes efficacy against clinically relevant pathogens including methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus spp. NVB333 shows no cross-resistance with other antibiotics tested and a very low propensity for resistance development. After intravenous dosing NVB333 has high exposure in mouse plasma and shows generally improved in vivo activity compared with vancomycin in mouse infection models despite modest MIC values. In thigh infection models, promising efficacy was demonstrated against several strains of S. aureus including methicillin-resistant S. aureus (MRSA) and vancomycin-intermediate S. aureus (VISA) strains, and against Enterococcus faecalis UNT126-3. Area under the concentration curve (AUC)/MIC was shown to be the best predictor of efficacy against S. aureus UNT103-3 with an AUC/MIC of 138 (uncorrected for protein binding) achieving a static effect. NVB333 was also effective in a disseminated infection model where it conferred complete survival from the MRSA strain ATCC 33591. NVB333 showed rather modest lung penetration after intravenous dosing (AUC in lung 2-3% of plasma AUC), but because of very high plasma exposure, therapeutic levels of compound were achieved in the lung. Efficacy at least equal to vancomycin was demonstrated against an MRSA strain (UNT084-3) in a bronchoalveolar infection model. The impressive in vivo efficacy of NVB333 and strong resistance prognosis makes this compound an interesting candidate for development for treating systemic Gram-positive infections.
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98
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Lactococcus lactis LMG2081 Produces Two Bacteriocins, a Nonlantibiotic and a Novel Lantibiotic. Appl Environ Microbiol 2016; 82:2555-2562. [PMID: 26896142 DOI: 10.1128/aem.03988-15] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 02/11/2016] [Indexed: 11/20/2022] Open
Abstract
Bacteriocin producers normally possess dedicated immunity systems to protect themselves from their own bacteriocins.Lactococcus lactis strains LMG2081 and BGBM50 are known as lactococcin G producers. However, BGBM50 was sensitive to LMG2081, which indicated that LMG2081 might produce additional bacteriocins that are not present in BGBM50. Therefore, whole-genome sequencing of the two strains was performed, and a lantibiotic operon (called lctLMG) was identified in LMG2081 but not in BGBM50. The lctLMG operon contains six open reading frames; the first three genes,lmgA ,lmgM, and lmgT, are involved in the biosynthesis and export of bacteriocin, while the other three genes,lmgF,lmgE, and lmgG, are involved in lantibiotic immunity. Mutational analysis confirmed that the lctLMG operon is responsible for the additional antimicrobial activity. Specifically, site-directed mutation within this operon rendered LMG2081 inactive toward BGBM50. Subsequent purification and electrospray ionization-time of flight mass spectrometric analysis confirmed that the lantibiotic bacteriocin called lacticin LMG is exported as a 25-amino-acid peptide. Lacticin LMG is highly similar to the lacticin 481 group. It is interesting that a bacteriocin producer produces two different classes of bacteriocins, whose operons are located in the chromosome and a plasmid.
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99
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Prudêncio CV, Mantovani HC, Cecon PR, Prieto M, Vanetti MCD. Temperature and pH influence the susceptibility of Salmonella Typhimurium to nisin combined with EDTA. Food Control 2016. [DOI: 10.1016/j.foodcont.2015.09.042] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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100
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Khosa S, Hoeppner A, Gohlke H, Schmitt L, Smits SHJ. Structure of the Response Regulator NsrR from Streptococcus agalactiae, Which Is Involved in Lantibiotic Resistance. PLoS One 2016; 11:e0149903. [PMID: 26930060 PMCID: PMC4773095 DOI: 10.1371/journal.pone.0149903] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 02/05/2016] [Indexed: 01/22/2023] Open
Abstract
Lantibiotics are antimicrobial peptides produced by Gram-positive bacteria. Interestingly, several clinically relevant and human pathogenic strains are inherently resistant towards lantibiotics. The expression of the genes responsible for lantibiotic resistance is regulated by a specific two-component system consisting of a histidine kinase and a response regulator. Here, we focused on a response regulator involved in lantibiotic resistance, NsrR from Streptococcus agalactiae, and determined the crystal structures of its N-terminal receiver domain and C-terminal DNA-binding effector domain. The C-terminal domain exhibits a fold that classifies NsrR as a member of the OmpR/PhoB subfamily of regulators. Amino acids involved in phosphorylation, dimerization, and DNA-binding were identified and demonstrated to be conserved in lantibiotic resistance regulators. Finally, a model of the full-length NsrR in the active and inactive state provides insights into protein dimerization and DNA-binding.
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Affiliation(s)
- Sakshi Khosa
- Institute of Biochemistry, Heinrich Heine University Duesseldorf, Universitaetsstr. 1, 40225, Duesseldorf, Germany
| | - Astrid Hoeppner
- X-Ray Facility and Crystal Farm, Heinrich Heine University Duesseldorf, Universitaetsstr. 1, 40225, Duesseldorf, Germany
| | - Holger Gohlke
- Institute of Pharmaceutical and Medicinal Chemistry, Heinrich Heine University Duesseldorf, Universitaetsstr. 1, 40225, Duesseldorf, Germany
| | - Lutz Schmitt
- Institute of Biochemistry, Heinrich Heine University Duesseldorf, Universitaetsstr. 1, 40225, Duesseldorf, Germany
| | - Sander H. J. Smits
- Institute of Biochemistry, Heinrich Heine University Duesseldorf, Universitaetsstr. 1, 40225, Duesseldorf, Germany
- * E-mail:
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