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Kimmelshue C, Goggi AS, Cademartiri R. The use of biological seed coatings based on bacteriophages and polymers against Clavibacter michiganensis subsp. nebraskensis in maize seeds. Sci Rep 2019; 9:17950. [PMID: 31784552 PMCID: PMC6884569 DOI: 10.1038/s41598-019-54068-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 11/05/2019] [Indexed: 12/21/2022] Open
Abstract
Biological control of bacteria with bacteriophages is a viable alternative to antibiotics. To be successful, biological control bacteriophages must be stable when exposed to the environment. Stabilization can be achieved through incorporation of bacteriophages into polymers and stabilizers that will be coated onto the seed. For this study, bacteriophages against Clavibacter michiganensis subsp. nebraskensis (Cmn), the causal agent of Goss's wilt, were incorporated into polyvinyl polymers with alcohol, ether and pyrrolidone functional groups and coated onto maize (Zea mays L.) seeds. The objectives of this study were to evaluate polymers and stabilizers that can protect Clavibacter michiganensis subsp. nebraskensis (CN8) bacteriophages against dehydration during storage. Bacteriophages stability when coated on seed depended on the glass transition temperature (Tg), functional groups of the polymer, and the presence of stabilizers such as sugars and proteins. Polyvinyl alcohol (PVOH) provided the greatest stability for CN8 bacteriophages on seed when coatings did not contain a stabilizer. A possible reason for the greater stability of this coating is having a glass transition temperature (Tg) very close to ambient temperature. PVOH combined with whey protein isolate (WPI) maintained CN8 bacteriophage activity in storage for four months at 26 °C and seven months at 10 °C. This coating also significantly reduced bacterial loads in seedlings grown from contaminated seeds, without affecting seed germination. Bacteriophage-polymer coatings which are stable during drying and storage, and are compatible with biological systems, not only provide an alternative to traditional antibiotics in agriculture, but also provide options for food, environmental and medical applications.
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Affiliation(s)
- Chad Kimmelshue
- Department of Agronomy, Iowa State University, Ames, Iowa, United States of America
- Seed Science Center, Iowa State University, Ames, Iowa, United States of America
| | - A Susana Goggi
- Department of Agronomy, Iowa State University, Ames, Iowa, United States of America.
- Seed Science Center, Iowa State University, Ames, Iowa, United States of America.
| | - Rebecca Cademartiri
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa, United States of America.
- Department of Material Science and Engineering, Iowa State University, Ames, Iowa, United States of America.
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52
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Chaudhry V, Patil PB. Evolutionary insights into adaptation of Staphylococcus haemolyticus to human and non-human niches. Genomics 2019; 112:2052-2062. [PMID: 31785311 DOI: 10.1016/j.ygeno.2019.11.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 11/16/2019] [Accepted: 11/26/2019] [Indexed: 11/16/2022]
Abstract
Staphylococcus haemolyticus is a well-known member of human skin microbiome and an emerging opportunistic human pathogen. Presently, evolutionary studies are limited to human isolates even though it is reported from plants with beneficial properties and in environmental settings. In the present study, we report isolation of novel S. haemolyticus strains from surface sterilized rice seeds and compare their genome to other isolates from diverse niches available in public domain. The study showed expanding nature of pan-genome and revealed set of genes with putative functions related to its adaptability. This is seen by presence of type II lanthipeptide cluster in rice isolates, metal homeostasis genes in an isolate from copper coin and gene encoding methicillin resistance in human isolates. The present study on differential genome dynamics and role of horizontal gene transfers has provided novel insights into capability for ecological diversification of a bacterium of significance to human health.
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Affiliation(s)
- Vasvi Chaudhry
- Bacterial Genomics and Evolution Laboratory, CSIR-Institute of Microbial Technology, Sector - 39A, Chandigarh 160036, India
| | - Prabhu B Patil
- Bacterial Genomics and Evolution Laboratory, CSIR-Institute of Microbial Technology, Sector - 39A, Chandigarh 160036, India.
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53
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Tyagi A, Pankaj V, Singh S, Roy S, Semwal M, Shasany AK, Sharma A. PlantAFP: a curated database of plant-origin antifungal peptides. Amino Acids 2019; 51:1561-1568. [PMID: 31612325 DOI: 10.1007/s00726-019-02792-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 10/01/2019] [Indexed: 12/13/2022]
Abstract
Emerging infectious diseases (EIDs) are a severe problem caused by fungi in human and plant species across the world. They pose a worldwide threat to food security as well as human health. Fungal infections are increasing now day by day worldwide, and the current antimycotic drugs are not effective due to the emergence of resistant strains. Therefore, it is an urgent need for the finding of new plant-origin antifungal peptides (PhytoAFPs). Huge numbers of peptides were extracted from different plant species which play a protective role against fungal infection. Hundreds of plant-origin peptides with antifungal activity have already been reported. So there is a requirement of a dedicated platform which systematically catalogs plant-origin peptides along with their antifungal properties. PlantAFP database is a resource of experimentally verified plant-origin antifungal peptides, collected from research articles, patents, and public databases. The current release of PlantAFP database contains 2585 peptide entries among which 510 are unique peptides. Each entry provides comprehensive information of a peptide that includes its peptide sequence, peptide name, peptide class, length of the peptide, molecular mass, antifungal activity, and origin of peptides. Besides this primary information, PlantAFP stores peptide sequences in SMILES format. In order to facilitate the user, many tools have been integrated into this database that includes BLAST search, peptide search, SMILES search, and peptide-mapping is also included in the database. PlantAFP database is accessible at http://bioinformatics.cimap.res.in/sharma/PlantAFP/.
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Affiliation(s)
- Atul Tyagi
- Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O.-CIMAP, Lucknow, Uttar Pradesh, 226 015, India.
| | - Vaishali Pankaj
- Amity Institute of Biotechnology, Amity University, Lucknow, Uttar Pradesh, 226010, India
| | - Sanjay Singh
- Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O.-CIMAP, Lucknow, Uttar Pradesh, 226 015, India
| | - Sudeep Roy
- Department of Biomedical Engineering, Faculty of Electrical Engineering and communication, Brno University of Technology-Techicka-10, 61600, Brno, Czech Republic
| | - Manoj Semwal
- Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O.-CIMAP, Lucknow, Uttar Pradesh, 226 015, India
| | - Ajit K Shasany
- Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O.-CIMAP, Lucknow, Uttar Pradesh, 226 015, India
| | - Ashok Sharma
- Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O.-CIMAP, Lucknow, Uttar Pradesh, 226 015, India.
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54
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Sarkar S, Singh PC. Mechanistic Aspects of Fungicide-Induced DNA Damage: Spectroscopic and Molecular Dynamics Simulation Studies. J Phys Chem B 2019; 123:8653-8661. [DOI: 10.1021/acs.jpcb.9b06009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Sunipa Sarkar
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Prashant Chandra Singh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
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55
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Mirakhorli N, Norolah Z, Foruzandeh S, Shafizade F, Nikookhah F, Saffar B, Ansari O. Multi-functionPlantDefensin,AntimicrobialandHeavyMetal Adsorbent Peptide. IRANIAN JOURNAL OF BIOTECHNOLOGY 2019; 17:e1562. [PMID: 32195280 PMCID: PMC7080970 DOI: 10.29252/ijb.1562] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background: Defensin peptide isolated from plants are often heterogeneous in length, sequence and structure, but they are mostly small, cationic and amphipathic.
Plant defensins exhibit broad-spectrum antibacterial and antifungal activities against Gram-positive and Gram-negative bacteria, fungi and etc.
Plant defensins also play an important role in innate immunity, such as heavy metal and some abiotic stresses tolerance. Objectives: In this paper, in vitro broad-spectrum activities, antimicrobial and heavy metal absorption, of a recombinant plant defensin were studied. Material and Methods: SDmod gene, a modified plant defensin gene, was cloned in pBISN1-IN (EU886197) plasmid, recombinant protein was produced by transient expression
via Agroinfiltration method in common bean. The recombinant protein was tested for antibacterial activity against Gram-negative, Gram-positive bacteria
and Fusarium sp. the effects of different treatments on heavy metal zinc absorption by this peptide were tested. Results: We confirmed the antibacterial activities of this peptide against Gram-negative (Escherichia coli and Pseudomonas aeruginosa) and Gram-positive
(Staphylococcus aureus and Bacillus cereus) bacteria, and antifungal activities of this peptide against Fusarium spp.
(Fusarium oxysporum and Fusarium solani).
High metal absorption coefficient for this peptide was also observed.
Results: Out of six actinobacterial isolates, VITVAMB 1 possessed the most efficient RO-16 decolorization property.
It decolorized 85.6% of RO-16 (250 mg L-1) within 24hrs. Isolate VITVAMB 1 was identified to be Nocardiopsis sp.
Maximum dye decolorization occurred at pH 8, temperature 35oC, 3% salt concentration and a dye concentration of 50 mg L-1. Conclusions: Results suggesting that modified defensin peptide facilitates a broader range of defense activities. dedefensins are an important part of the
innate immune system in eukaryotes. These molecules have multidimensional properties that making them promising agents for therapeutic drugs.
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Affiliation(s)
- Neda Mirakhorli
- Department of Plant Breeding and Biotechnology, Shahrekord University, Shahrekord, Iran
| | - Zahra Norolah
- Department of Plant Breeding and Biotechnology, Shahrekord University, Shahrekord, Iran
| | - Samira Foruzandeh
- Department of Plant Breeding and Biotechnology, Shahrekord University, Shahrekord, Iran
| | - Fateme Shafizade
- Department of Plant Breeding and Biotechnology, Shahrekord University, Shahrekord, Iran
| | - Farzaneh Nikookhah
- Department of Fisheries and Environmental Science, Shahrekord University, Shahrekord, Iran
| | - Behnaz Saffar
- Department of Genetic, Shahrekord University, Shahrekord, Iran
| | - Omid Ansari
- Ecofibre Industries Operations and Ananda Hemp, Brisbane, Australia
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56
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Sathoff AE, Samac DA. Antibacterial Activity of Plant Defensins. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2019; 32:507-514. [PMID: 30501455 DOI: 10.1094/mpmi-08-18-0229-cr] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Plant defensins are antimicrobial host defense peptides expressed in all higher plants. Performing a significant role in plant innate immunity, plant defensins display potent activity against a wide range of pathogens. Vertebrate and invertebrate defensins have well-characterized antibacterial activity, but plant defensins are commonly considered to display antimicrobial activity against only fungi. In this review, we highlight the often-overlooked antibacterial activity of plant defensins. Also, we illustrate methods to evaluate defensins for antibacterial activity and describe the current advances in uncovering their antibacterial modes of action.
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Affiliation(s)
- Andrew E Sathoff
- 1 Department of Plant Pathology, 1991 Upper Buford Circle, University of Minnesota, St. Paul, MN, 55108, U.S.A.; and
| | - Deborah A Samac
- 1 Department of Plant Pathology, 1991 Upper Buford Circle, University of Minnesota, St. Paul, MN, 55108, U.S.A.; and
- 2 USDA-ARS, Plant Science Research Unit, 1991 Upper Buford Circle, St. Paul, MN 55108, U.S.A
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57
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Devi MS, Sashidhar RB. Antiaflatoxigenic effects of selected antifungal peptides. Peptides 2019; 115:15-26. [PMID: 30776385 DOI: 10.1016/j.peptides.2019.02.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 02/08/2019] [Accepted: 02/14/2019] [Indexed: 12/11/2022]
Abstract
Aflatoxins are potent carcinogenic mycotoxins produced as secondary metabolites mainly by the fungi Aspergillus flavus and Aspergillus parasiticus. Control measures to curtail the contamination of aflatoxin in food products is still a challenge. Although there are several reports on the antifungal peptides, there is no specific study on the action of antifungal peptides on aflatoxin synthesis. This work details the effect of four antimicrobial peptides (AMPs) - PPD1 (FRLHF), 66-10 (FRLKFH), 77-3 (FRLKFHF) and D4E1 (FKLRAKIKVRLRAKIKL) on the aflatoxin production by A. flavus and A. parasiticus. Results of the investigations suggests that AMPs at near minimum inhibitory concentrations (MIC) were effectively inhibiting aflatoxins, without hindering the growth of the fungi. These AMPs, at concentrations near MIC, induced membrane permeabilisation, without inducing cellular leakage. The involvement of oxidative stress for the aflatoxin synthesis was reversed by the antioxidant nature of the peptides as evidenced by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid (ABTS) assay, reactive oxygen species production, malondialdehyde and antioxidant enzymes analysis. Quantitative real time polymerase chain reaction (RT-qPCR) analysis of the aflatoxin gene cluster showed that 'aflR' and its downstream genes expressions were significantly down regulated. Conidiation of the fungi were negatively influenced by the peptides as evidenced by scanning electron microscopy analysis and RT-qPCR. mRNA levels of Manganese-superoxide dismutase (Mn-SOD) showed a decrease in the expression in RT-qPCR. The effect of these peptides on aflatoxin inhibition provides insight into their use as novel antiaflatoxigenic molecules.
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Affiliation(s)
- Manju S Devi
- Department of Biochemistry, University College of Science, Osmania University, Hyderabad-500 007, Telangana State, India
| | - R B Sashidhar
- Department of Biochemistry, University College of Science, Osmania University, Hyderabad-500 007, Telangana State, India.
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58
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Study on Antiviral Activity of Two Recombinant Antimicrobial Peptides Against Tobacco Mosaic Virus. Probiotics Antimicrob Proteins 2019; 11:1370-1378. [PMID: 30887308 DOI: 10.1007/s12602-019-09539-4] [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] [Indexed: 10/27/2022]
Abstract
Antimicrobial peptides (AMPs) are generally small peptides with less than 50 amino acid residues, which have been considered as the first line of defense system in plants and animals. These small cationic peptides belong to a family of antimicrobials that are multifunctional effectors of innate immunity. The direct antimicrobial activity of AMPs against different bacteria, viruses, fungi, and parasites has been confirmed in different studies. In this study, the antiviral activity of two recombinant AMPs named thanatin and lactoferricin+lactoferrampin was evaluated against Tobacco mosaic virus (TMV) using half-leaf and leaf disk methods under in vivo and in vitro condition, respectively. The obtained result indicated that both recombinant AMPs have shown an antiviral activity against TMV. Compared to the chimeric lactoferricin+lactoferrampin, recombinant thanatin showed a higher rate of antiviral activity against TMV. Three types of effects, including protective, curative, and inactivation, were evaluated during an antiviral activity test. In the present study, the antiviral activity of two recombinant AMPs is represented for the first time: thanatin and chimeric lactoferricin+lactoferrampin against TMV as a viral plant pathogen.
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59
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Morais TP, Zaini PA, Chakraborty S, Gouran H, Carvalho CP, Almeida-Souza HO, Souza JB, Santos PS, Goulart LR, Luz JMQ, Nascimento R, Dandekar AM. The plant-based chimeric antimicrobial protein SlP14a-PPC20 protects tomato against bacterial wilt disease caused by Ralstonia solanacearum. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 280:197-205. [PMID: 30823998 DOI: 10.1016/j.plantsci.2018.11.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 11/01/2018] [Accepted: 11/26/2018] [Indexed: 06/09/2023]
Abstract
Cecropin-B (CecB) is a peptide with well-established antimicrobial properties against different phytopathogenic bacteria. Despite modest action against Ralstonia solanacearum, its animal source limits the acceptance in transgenic applications. To overcome this, we selected eight alpha-helical (AH) cationic peptides derived from plant protein sequences and investigated their antimicrobial properties against R. solanacearum. Remarkably, PPC20 (a linear AH-peptide present in phosphoenolpyruvate carboxylase) has a three-fold lower lethal dose on R. solanacearum than CecB and lower toxicity to human intestinal epithelial cells. Linking PPC20 to SlP14a (part of a pathogenesis-related protein) established an apoplast-targeted protein providing a means of secreting and stabilizing the antimicrobial peptide in the plant compartment colonized by the pathogen. SlP14a is also a potential antimicrobial, homologous to a human elastase which likely targets outer membrane proteins in Gram-negative bacteria. Recombinant SlP14a-PPC20 showed antibacterial activity against R. solanacearum in vitro, making it a promising candidate for plant protection. This was confirmed with genetically-modified tomato plants engineered to express SlP14a-PPC20, in which bacterial populations in stems were reduced compared to inoculated wild-type control plants. Disease symptoms were also markedly less severe in SlP14a-PPC20-expressing plants, demonstrating a viable strategy to improve resistance against bacterial wilt in tomato.
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Affiliation(s)
- Tâmara P Morais
- Institute of Agricultural Sciences, University of Uberlândia, Uberlândia, 38410-337, MG, Brazil; Institute of Genetics and Biochemistry, University of Uberlândia, Uberlândia, 38400-902, MG, Brazil
| | - Paulo A Zaini
- Department of Plant Sciences, University of California, Davis, 95616, CA, USA
| | - Sandeep Chakraborty
- Department of Plant Sciences, University of California, Davis, 95616, CA, USA
| | - Hossein Gouran
- Department of Plant Sciences, University of California, Davis, 95616, CA, USA
| | - Camila P Carvalho
- Department of Plant Pathology, University of São Paulo, Piracicaba, SP, 13418-900 Brazil
| | - Hebréia O Almeida-Souza
- Institute of Genetics and Biochemistry, University of Uberlândia, Uberlândia, 38400-902, MG, Brazil
| | - Jessica B Souza
- Institute of Genetics and Biochemistry, University of Uberlândia, Uberlândia, 38400-902, MG, Brazil
| | - Paula S Santos
- Institute of Genetics and Biochemistry, University of Uberlândia, Uberlândia, 38400-902, MG, Brazil
| | - Luiz R Goulart
- Institute of Genetics and Biochemistry, University of Uberlândia, Uberlândia, 38400-902, MG, Brazil; Department of Plant Sciences, University of California, Davis, 95616, CA, USA
| | - José M Q Luz
- Institute of Agricultural Sciences, University of Uberlândia, Uberlândia, 38410-337, MG, Brazil
| | - Rafael Nascimento
- Institute of Genetics and Biochemistry, University of Uberlândia, Uberlândia, 38400-902, MG, Brazil; Department of Plant Sciences, University of California, Davis, 95616, CA, USA
| | - Abhaya M Dandekar
- Department of Plant Sciences, University of California, Davis, 95616, CA, USA.
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60
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Zakharchenko NS, Pigoleva SV, Furs OV, Shevchuk TV, Dyachenko OV, Buryanov YI. Gene Expression of the Antimicrobial Peptide Bombinin Increases the Resistance of Transgenic Tobacco Plants to Phytopathogens. APPL BIOCHEM MICRO+ 2019. [DOI: 10.1134/s0003683818070086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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61
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Camó C, Bonaterra A, Badosa E, Baró A, Montesinos L, Montesinos E, Planas M, Feliu L. Antimicrobial peptide KSL-W and analogues: Promising agents to control plant diseases. Peptides 2019; 112:85-95. [PMID: 30508634 DOI: 10.1016/j.peptides.2018.11.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 11/28/2018] [Accepted: 11/29/2018] [Indexed: 01/08/2023]
Abstract
Recent strong restrictions on the use of pesticides has prompted the search for safer alternatives, being antimicrobial peptides promising candidates. Herein, with the aim of identifying new agents, 15 peptides reported as plant defense elicitors, promiscuous, multifunctional or antimicrobial were selected and tested against six plant pathogenic bacteria of economic importance. Within this set, KSL-W (KKVVFWVKFK-NH2) displayed high antibacterial activity against all the tested pathogens, low hemolysis and low phytotoxicity in tobacco leaves. This peptide was taken as a lead and 49 analogues were designed and synthesized, including N-terminal deletion sequences, peptides incorporating a d-amino acid and lipopeptides. The screening of these sequences revealed that a nine amino acid length was the minimum for activity. The presence of a d-amino acid significantly decreased the hemolysis and endowed KSL-W with the capacity to induce the expression of defense-related genes in tomato plants. The incorporation of an acyl chain led to sequences with high activity against Xanthomonas strains, low hemolysis and phytotoxicity. Therefore, this study demonstrates that KSL-W constitutes an excellent candidate as new agent to control plant diseases and can be considered as a lead to develop derivatives with multifunctional properties, including antimicrobial and plant defense elicitation.
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Affiliation(s)
- Cristina Camó
- LIPPSO, Department of Chemistry, University of Girona, Campus Montilivi, Girona, Spain
| | - Anna Bonaterra
- Laboratory of Plant Pathology, Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Campus Montilivi, Girona, Spain
| | - Esther Badosa
- Laboratory of Plant Pathology, Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Campus Montilivi, Girona, Spain
| | - Aina Baró
- Laboratory of Plant Pathology, Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Campus Montilivi, Girona, Spain
| | - Laura Montesinos
- Laboratory of Plant Pathology, Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Campus Montilivi, Girona, Spain
| | - Emilio Montesinos
- Laboratory of Plant Pathology, Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Campus Montilivi, Girona, Spain
| | - Marta Planas
- LIPPSO, Department of Chemistry, University of Girona, Campus Montilivi, Girona, Spain.
| | - Lidia Feliu
- LIPPSO, Department of Chemistry, University of Girona, Campus Montilivi, Girona, Spain.
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62
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Heep J, Klaus A, Kessel T, Seip M, Vilcinskas A, Skaljac M. Proteomic Analysis of the Venom from the Ruby Ant Myrmica rubra and the Isolation of a Novel Insecticidal Decapeptide. INSECTS 2019; 10:E42. [PMID: 30717163 PMCID: PMC6409562 DOI: 10.3390/insects10020042] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 01/21/2019] [Accepted: 01/24/2019] [Indexed: 11/24/2022]
Abstract
Ants are a biodiverse group of insects that have evolved toxic venom containing many undiscovered bioactive molecules. In this study, we found that the venom of the ruby ant Myrmica rubra is a rich source of peptides. LC-MS analysis revealed the presence of 142 different peptides varying in molecular weight, sequence length, and hydrophobicity. One of the most abundant peaks was selected for further biochemical and functional characterization. Combined Edman degradation and de novo peptide sequencing revealed the presence of a novel decapeptide (myrmicitoxin) with the amino acid sequence NH₂-IDPKLLESLA-CONH₂. The decapeptide was named U-MYRTX-MRArub1 and verified against a synthetic standard. The amidated peptide was tested in a synthetic form to determine the antimicrobial activity towards the bacterial pathogens and insecticidal potential against pea aphids (Acyrthosiphon pisum). This peptide did not show antimicrobial activity but it significantly reduced the survival of aphids. It also increased the sensitivity of the aphids to two commonly used chemical insecticides (imidacloprid and methomyl). Since ant venom research is still in its infancy, the findings of this first study on venom peptides derived from M. rubra highlight these insects as an important and rich source for discovery of novel lead structures with potential application in pest control.
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Affiliation(s)
- John Heep
- Bioresources Project Group, Fraunhofer Institute for Molecular Biology and Applied Ecology, Winchesterstrasse 2, 35394 Giessen, Germany.
| | - Alica Klaus
- Bioresources Project Group, Fraunhofer Institute for Molecular Biology and Applied Ecology, Winchesterstrasse 2, 35394 Giessen, Germany.
| | - Tobias Kessel
- Bioresources Project Group, Fraunhofer Institute for Molecular Biology and Applied Ecology, Winchesterstrasse 2, 35394 Giessen, Germany.
| | - Maximilian Seip
- Bioresources Project Group, Fraunhofer Institute for Molecular Biology and Applied Ecology, Winchesterstrasse 2, 35394 Giessen, Germany.
| | - Andreas Vilcinskas
- Bioresources Project Group, Fraunhofer Institute for Molecular Biology and Applied Ecology, Winchesterstrasse 2, 35394 Giessen, Germany.
- Institute for Insect Biotechnology, Justus Liebig University of Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany.
| | - Marisa Skaljac
- Bioresources Project Group, Fraunhofer Institute for Molecular Biology and Applied Ecology, Winchesterstrasse 2, 35394 Giessen, Germany.
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63
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Nanjundan J, Ramasamy R, Uthandi S, Ponnusamy M. Antimicrobial activity and spectroscopic characterization of surfactin class of lipopeptides from Bacillus amyloliquefaciens SR1. Microb Pathog 2019; 128:374-380. [PMID: 30695712 DOI: 10.1016/j.micpath.2019.01.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 01/23/2019] [Accepted: 01/23/2019] [Indexed: 11/18/2022]
Abstract
A bacterial isolate screened from wet land soil sample, found to posses antimicrobial activity against an array of fungal plant pathogens viz., Rhizoctonia solani, Sclerotium rolfsii, Alternaria solani, Fusarium oxysporum under in vitro dual culture plate assay. Further the isolate was identified into Bacillus amyloliquefaciens based on 16S rRNA sequencing. The antimicrobial fraction from the extracellular supernatant of the isolate comprises chiefly of surfactin molecules and also iturin and fengycin group of compounds. The surfactins were partially purified by tangential flow ultra-filtration and quantified with liquid chromatography yielding 316.1 mg L-1. Further the surfactin molecules were characterized by HPLC separation, FT-IR, LC-MS spectroscopy and PCR amplification of antibiotic genes. The surfactin molecule with m/z 1022 performed for MS-MS fragmentation and produced two different patterns of ion dissociation.
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MESH Headings
- Alternaria/pathogenicity
- Anti-Infective Agents/chemistry
- Anti-Infective Agents/isolation & purification
- Anti-Infective Agents/pharmacology
- Antifungal Agents/chemistry
- Antifungal Agents/isolation & purification
- Antifungal Agents/pharmacology
- Ascomycota/pathogenicity
- Bacillus amyloliquefaciens/classification
- Bacillus amyloliquefaciens/genetics
- Bacillus amyloliquefaciens/isolation & purification
- Bacillus amyloliquefaciens/metabolism
- Chromatography, High Pressure Liquid
- Chromatography, Liquid
- DNA, Bacterial
- Fusarium/pathogenicity
- Genes, Bacterial/genetics
- Lipopeptides/chemistry
- Lipopeptides/genetics
- Lipopeptides/isolation & purification
- Lipopeptides/pharmacology
- Peptides, Cyclic/chemistry
- Peptides, Cyclic/genetics
- Peptides, Cyclic/isolation & purification
- Peptides, Cyclic/pharmacology
- Plant Diseases/microbiology
- RNA, Ribosomal, 16S/genetics
- Rhizoctonia/pathogenicity
- Soil Microbiology
- Spectroscopy, Fourier Transform Infrared
- Tandem Mass Spectrometry
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Affiliation(s)
- Jaivel Nanjundan
- Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India.
| | - Rajesh Ramasamy
- Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
| | - Sivakumar Uthandi
- Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
| | - Marimuthu Ponnusamy
- Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
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64
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Khalili S, Mohebali M, Ebrahimzadeh E, Shayan E, Mohammadi-Yeganeh S, Moosazadeh Moghaddam M, Elikaee S, Akhoundi B, Sharifi-Yazdi MK. Antimicrobial activity of an antimicrobial peptide against amastigote forms of Leishmania major. VETERINARY RESEARCH FORUM : AN INTERNATIONAL QUARTERLY JOURNAL 2018; 9:323-328. [PMID: 30713610 PMCID: PMC6346494 DOI: 10.30466/vrf.2018.33107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Accepted: 06/09/2018] [Indexed: 12/14/2022]
Abstract
Zoonotic cutaneous leishmaniasis caused by Leishmania major is a most common type of vector-borne disease in Iran. The pentavalent antimonial drugs have been used in the treatment of cutaneous leishmaniasis for a long time, but drug resistance and some of serious side effects have been reported. Thus, discovery and development of new therapeutic candidates are needed. The CM11 peptide is one of these peptides that its anti-bacterial activity has been proven. This peptide is a short cecropin–melittin hybrid peptide obtained through a sequence combination approach. The aim of this study was to evaluate in vitro anti-leishmanial activity of CM11 peptide against amastigote forms of Leishmania major. In this study, amastigote forms of Iranian strain of L. major (MRHO/IR/75/ER) were cultured in the presence of different concentrations of meglumine antimoniate (Glucantime®) to find the most appropriate in vitro concentration of Glucantime® against L. major amastigotes. Then, the anti-leishmanial activities of various concentrations of CM11 peptide (8, 16, 32 and 64 µM) were evaluated for 24, 48 and 72 hr by DAPI staining. In addition, MTT assay was used to determine the cytotoxic effects of CM11 peptide on murine fibroblast cell line. The results showed that CM11 peptide has antimicrobial activity against Iranian isolate of L. major in the laboratory conditions. It seems that the CM11 peptide has significant potential to be used as a new anti-leishmanial agent.
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Affiliation(s)
- Sara Khalili
- Department of Parasitology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Mehdi Mohebali
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.,Center for Research of Endemic Parasites of Iran, Tehran University of Medical Sciences, Tehran, Iran
| | - Elaheh Ebrahimzadeh
- Department of Parasitology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.,Department of Pathobiology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Ebrahimzadeh Shayan
- Department of Parasitology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | | | | | - Samira Elikaee
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Behnaz Akhoundi
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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65
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Li Y, Cui T, Wang Y, Ge X. Isolation and characterization of a novel bacterium Pseudomonas aeruginosa for biofertilizer production from kitchen waste oil. RSC Adv 2018; 8:41966-41975. [PMID: 35558780 PMCID: PMC9092076 DOI: 10.1039/c8ra09779h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 12/03/2018] [Indexed: 11/21/2022] Open
Abstract
Kitchen waste oil is composed of long chain triglycerides (LCTs) that has high energy density. However, it is hard to be degraded by microbes, thereby leading to increasing levels of environmental pollution due to landfill disposition. In this study, we isolated and characterized a novel bacterium Pseudomonas aeruginosa PA-3 that could convert kitchen waste oil into biofertilizer. PA-3 could survive on trilaurin or kitchen waste oil as the sole carbon source, and 10 g L-1 trilaurin or kitchen waste oil was completely consumed within 7 days. Interestingly, the degradation products of kitchen waste oil can be used as biofertilizer in promoting cabbage growth. The plant height, leaf area and stem diameter of cabbage plants were all increased with the addition of kitchen waste oil cultivation products into the soil. Kitchen waste oil degradation products were analyzed by gas chromatography mass spectrometry (GC-MS), and short chain alcohols or fatty acids were observed to be the main products. To unravel the mechanism underlying the accelerated cabbage growth, bacterial diversity of the soil was investigated after using this biofertilizer. Results showed that agricultural probiotics accumulated with the addition of kitchen waste oil cultivation products. Finally, the whole genome of PA-3 was sequenced and analyzed, which showed the existence of a complete β-oxidation pathway in the genome of PA-3. To our knowledge, this is the first study on kitchen waste oil degradation and re-utilization by bacteria, which provides a new method for waste source re-utilization.
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Affiliation(s)
- Ying Li
- Beijing Key Laboratory of Biomass Waste Resource Utilization, Biochemical Engineering College, Beijing Union University Beijing 100023 China
| | - Ting Cui
- Beijing Key Laboratory of Biomass Waste Resource Utilization, Biochemical Engineering College, Beijing Union University Beijing 100023 China
| | - Yaxin Wang
- Beijing Key Laboratory of Biomass Waste Resource Utilization, Biochemical Engineering College, Beijing Union University Beijing 100023 China
| | - Xizhen Ge
- Beijing Key Laboratory of Biomass Waste Resource Utilization, Biochemical Engineering College, Beijing Union University Beijing 100023 China
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66
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Dong N, Chou S, Li J, Xue C, Li X, Cheng B, Shan A, Xu L. Short Symmetric-End Antimicrobial Peptides Centered on β-Turn Amino Acids Unit Improve Selectivity and Stability. Front Microbiol 2018; 9:2832. [PMID: 30538681 PMCID: PMC6277555 DOI: 10.3389/fmicb.2018.02832] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 11/05/2018] [Indexed: 11/13/2022] Open
Abstract
Antimicrobial peptides (AMPs) are excellent candidates to combat the increasing number of multi- or pan-resistant pathogens worldwide based on their mechanism of action, which is different from that of antibiotics. In this study, we designed short peptides by fusing an α-helix and β-turn sequence-motif in a symmetric-end template to promote the higher cell selectivity, antibacterial activity and salt-resistance of these structures. The results showed that the designed peptides PQ and PP tended to form an α-helical structure upon interacting with a membrane-mimicking environment. They displayed high cell selectivity toward bacterial cells over eukaryotic cells. Their activities were mostly maintained in the presence of different conditions (salts, serum, heat, and pH), which indicated their stability in vivo. Fluorescence spectroscopy and electron microscopy analyses indicated that PP and PQ killed bacterial cells through membrane pore formation, thereby damaging membrane integrity. This study revealed the potential application of these designed peptides as new candidate antimicrobial agents.
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Affiliation(s)
- Na Dong
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Shuli Chou
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Jiawei Li
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Chenyu Xue
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Xinran Li
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Baojing Cheng
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Anshan Shan
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Li Xu
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
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67
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A structural perspective of plant antimicrobial peptides. Biochem J 2018; 475:3359-3375. [PMID: 30413680 DOI: 10.1042/bcj20180213] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Revised: 10/12/2018] [Accepted: 10/14/2018] [Indexed: 12/26/2022]
Abstract
Among the numerous strategies plants have developed to fend off enemy attack, antimicrobial peptides (AMPs) stand out as one of the most prominent defensive barriers that grant direct and durable resistance against a wide range of pests and pathogens. These small proteins are characterized by a compact structure and an overall positive charge. AMPs have an ancient origin and widespread occurrence in the plant kingdom but show an unusually high degree of variation in their amino acid sequences. Interestingly, there is a strikingly conserved topology among the plant AMP families, suggesting that the defensive properties of these peptides are not determined by their primary sequences but rather by their tridimensional structure. To explore and expand this idea, we here discuss the role of AMPs for plant defense from a structural perspective. We show how specific structural properties, such as length, charge, hydrophobicity, polar angle and conformation, are essential for plant AMPs to act as a chemical shield that hinders enemy attack. Knowledge on the topology of these peptides is facilitating the isolation, classification and even structural redesign of AMPs, thus allowing scientists to develop new peptides with multiple agronomical and pharmacological potential.
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68
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Mamarabadi M, Tanhaeian A, Ramezany Y. Antifungal activity of recombinant thanatin in comparison with two plant extracts and a chemical mixture to control fungal plant pathogens. AMB Express 2018; 8:180. [PMID: 30390158 PMCID: PMC6214488 DOI: 10.1186/s13568-018-0710-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Accepted: 10/29/2018] [Indexed: 12/22/2022] Open
Abstract
The most common method for controlling plant diseases is the application of chemical pesticides and sometimes use of resistant cultivars. Due to the effects of chemical pesticides on human and environmental health, mutation in pathogens and resistance to various toxins besides the challenges with resistant cultivar production, the constant use of these methods are not recommended any longer. Thus, use of biological control agents along with the natural ingredient extracted from plants and application of peptide with antimicrobial activity, have been the focus of many researchers. In the present study, the antifungal activity of two plant extracts named Turmeric and Persian lilac in comparison with a chemical mixture and recombinant thanatin were evaluated against five following fungal plant pathogens; Geotrichum candidum, Botrytis cinerea, Rhizoctonia solani, Alternaria tenuissima and Gibberella fujikuroi. The results showed that, all treatments have antifungal activity against tested fungi. Both plant extracts were shown an acceptable antifungal activity against tested fungi but their inhibition effects was not comparable with chemical mixture. Turmeric showed a higher rate of mycelial inhibition than Persian lilac. Amongst all treatment, thanatin showed a great antifungal activity by its application at µg level under both in vitro and in vivo condition. Considering to the compatibility of thanatin with human health and environmental safety we could imagine a clear perspective for the application of this recombinant peptide in sustainable agriculture.
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69
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de Almeida Lopes KB, Carpentieri-Pipolo V, Fira D, Balatti PA, López SMY, Oro TH, Stefani Pagliosa E, Degrassi G. Screening of bacterial endophytes as potential biocontrol agents against soybean diseases. J Appl Microbiol 2018; 125:1466-1481. [PMID: 29978936 DOI: 10.1111/jam.14041] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/28/2018] [Accepted: 06/08/2018] [Indexed: 12/23/2022]
Abstract
AIMS This research was aimed at identifying and characterizing endophytic micro-organisms associated with soybean that have antimicrobial activity towards soybean pathogens. METHODS AND RESULTS Soybean plants were collected from field trials in four locations of southern Brazil that were cultivated with conventional (C) and transgenic glyphosate-resistant (GR) soybeans. Endophytic bacteria isolated from roots, stems and leaves of soybeans were evaluated for their capacity to inhibit fungal and bacterial plant pathogens and 13 micro-organisms were identified with antagonistic activity. Approximately 230 bacteria were isolated and identified based on the 16S rRNA and rpoN gene sequences. Bacteria isolated from conventional and transgenic soybeans were significantly different not only in population diversity but also in their antagonistic capacity. Thirteen isolates showed in vitro antagonism against Sclerotinia sclerotiorum, Phomopsis sojae and Rhizoctonia solani. Bacillus sp. and Burkholderia sp. were the most effective isolates in controlling bacterial and fungal pathogens in vitro. Extracts and precipitates from culture supernatants of isolates showed different patterns of inhibitory activity on growth of fungal and bacterial pathogens. CONCLUSIONS Bacillus sp. and Burkholderia sp. were the most effective isolates in controlling fungal pathogens in vitro, and the activity is mainly due to peptides. However, most of the studied bacteria showed the presence of antimicrobial compounds in the culture supernatant, either peptides, bacteriocins or secondary metabolites. SIGNIFICANCE AND IMPACT OF THE STUDY These results could be significant to develop tools for the biological control of soybean diseases. The work brought to the identification of micro-organisms such as Bacillus sp. and Burkholderia sp. that have the potential to protect crops in order to enhance a sustainable management system of crops. Furthermore, the study provides the first evidences of the influence of management as well as the genetics of glyphosate-resistant soybean on the diversity of bacterial endophytes of soybean phytobiome.
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Affiliation(s)
| | | | - Djordje Fira
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Pedro Alberto Balatti
- Centro de Investigaciones de Fitopatología, Fac. de Ciencias Agrarias y Forestales - UNLP, La Plata, Argentina
| | | | | | | | - Giuliano Degrassi
- International Center for Genetic Engineering and Biotechnology, Polo Cientifico Tecnologico, Buenos Aires, Argentina
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70
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Campos ML, de Souza CM, de Oliveira KBS, Dias SC, Franco OL. The role of antimicrobial peptides in plant immunity. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:4997-5011. [PMID: 30099553 DOI: 10.1093/jxb/ery294] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 07/31/2018] [Indexed: 05/21/2023]
Abstract
Selective pressure imposed by millions of years of relentless biological attack has led to the development of an extraordinary array of defense strategies in plants. Among these, antimicrobial peptides (AMPs) stand out as one of the most prominent components of the plant immune system. These small and usually basic peptides are deployed as a generalist defense strategy that grants direct and durable resistance against biotic stress. Even though their name implies a function against microbes, the range of plant-associated organisms affected by these peptides is much broader. In this review, we highlight the advances in our understanding on the role of AMPs in plant immunity. We demonstrate that the capacity of plant AMPs to act against a large spectrum of enemies relies on their diverse mechanism of action and remarkable structural stability. The efficacy of AMPs as a defense strategy is evidenced by their widespread occurrence in the plant kingdom, an astonishing heterogeneity in host peptide composition, and the extent to which plant enemies have evolved effective counter-measures to evade AMP action. Plant AMPs are becoming an important topic of research due to their significance in allowing plants to thrive and for their enormous potential in agronomical and pharmaceutical fields.
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Affiliation(s)
- Marcelo Lattarulo Campos
- Centro de Análises Bioquímicas e Proteômicas, Universidade Católica de Brasilia, Brasilia/DF, Brazil
- Departamento de Botânica e Ecologia, Instituto de Biociências, Universidade Federal de Mato Grosso, Cuiabá/MT, Brazil
| | - Camila Maurmann de Souza
- Centro de Análises Bioquímicas e Proteômicas, Universidade Católica de Brasilia, Brasilia/DF, Brazil
| | | | - Simoni Campos Dias
- Centro de Análises Bioquímicas e Proteômicas, Universidade Católica de Brasilia, Brasilia/DF, Brazil
- Universidade de Brasilia, Pós-Graduação em Biologia Animal, Campus Darcy Ribeiro, Brasilia/DF, Brazil
| | - Octávio Luiz Franco
- Centro de Análises Bioquímicas e Proteômicas, Universidade Católica de Brasilia, Brasilia/DF, Brazil
- S-Inova Biotech, Universidade Católica Dom Bosco, Campo Grande/MS, Brazil
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71
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Characterization of a novel cysteine-rich antifungal protein from Fusarium graminearum with activity against maize fungal pathogens. Int J Food Microbiol 2018; 283:45-51. [DOI: 10.1016/j.ijfoodmicro.2018.06.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 06/15/2018] [Accepted: 06/22/2018] [Indexed: 02/08/2023]
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72
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Tang SS, Prodhan ZH, Biswas SK, Le CF, Sekaran SD. Antimicrobial peptides from different plant sources: Isolation, characterisation, and purification. PHYTOCHEMISTRY 2018; 154:94-105. [PMID: 30031244 DOI: 10.1016/j.phytochem.2018.07.002] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 07/03/2018] [Accepted: 07/07/2018] [Indexed: 05/20/2023]
Abstract
Antimicrobial peptides (AMPs), the self-defence products of organisms, are extensively distributed in plants. They can be classified into several groups, including thionins, defensins, snakins, lipid transfer proteins, glycine-rich proteins, cyclotides and hevein-type proteins. AMPs can be extracted and isolated from different plants and plant organs such as stems, roots, seeds, flowers and leaves. They perform various physiological defensive mechanisms to eliminate viruses, bacteria, fungi and parasites, and so could be used as therapeutic and preservative agents. Research on AMPs has sought to obtain more detailed and reliable information regarding the selection of suitable plant sources and the use of appropriate isolation and purification techniques, as well as examining the mode of action of these peptides. Well-established AMP purification techniques currently used include salt precipitation methods, absorption-desorption, a combination of ion-exchange and reversed-phase C18 solid phase extraction, reversed-phase high-performance liquid chromatography (RP-HPLC), and the sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) method. Beyond these traditional methods, this review aims to highlight new and different approaches to the selection, characterisation, isolation, purification, mode of action and bioactivity assessment of a range of AMPs collected from plant sources. The information gathered will be helpful in the search for novel AMPs distributed in the plant kingdom, as well as providing future directions for the further investigation of AMPs for possible use on humans.
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Affiliation(s)
- Swee-Seong Tang
- Division of Microbiology, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Zakaria H Prodhan
- Division of Microbiology, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia; Department of Agronomy, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China.
| | - Sudhangshu K Biswas
- Division of Microbiology, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Cheng-Foh Le
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, Semenyih, Selangor, Malaysia.
| | - Shamala D Sekaran
- Faculty of Medicine, MAHSA University, Saujana Putra Campus, 42610, Jenjarum, Selangor, Malaysia.
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73
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Characterization and evaluation of antimicrobial activity of actinonin against foodborne pathogens. Food Sci Biotechnol 2018; 26:1649-1657. [PMID: 30263702 DOI: 10.1007/s10068-017-0190-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 07/24/2017] [Accepted: 07/30/2017] [Indexed: 12/19/2022] Open
Abstract
This study revealed the antimicrobial properties of actinonin against major foodborne pathogens, Escherichia coli O157:H7, Listeria monocytogenes, Salmonella Typhimurium, Staphylococcus aureus, and Vibrio vulnificus. Among them, actinonin caused growth defect in S. Typhimurium and V. vulnificus. Minimal inhibitory concentration (MIC) values of actinonin were determined by broth microdilution methods. The MICs of actinonin were ≤0.768 μg/ml for S. Typhimurium and ≤0.192 μg/ml for V. vulnificus. Susceptibility to actinonin in both pathogens was measured by colony-forming ability and disc diffusion test. The results showed actinonin had antimicrobial activity against S. Typhimurium and V. vulnificus in a dose-dependent manner. The inhibitory effects on swarming motility were determined, and cytotoxicity of each pathogen against HeLa cells was decreased significantly by actinonin treatment. Furthermore, actinonin showed an antimicrobial efficacy in food models infected with these pathogens. These results demonstrate that actinonin is potentially an effective agent for food sanitization or preservation.
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74
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Toward the enhancement of sensory profile of sausage “Merguez” with chickpea protein concentrate. Meat Sci 2018; 143:74-80. [DOI: 10.1016/j.meatsci.2018.04.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Revised: 02/28/2018] [Accepted: 04/23/2018] [Indexed: 11/22/2022]
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75
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Zhang QX, Zhang Y, He LL, Ji ZL, Tong YH. Identification of a small antimycotic peptide produced by Bacillus amyloliquefaciens 6256. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 150:78-82. [PMID: 30195391 DOI: 10.1016/j.pestbp.2018.07.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 06/22/2018] [Accepted: 07/17/2018] [Indexed: 06/08/2023]
Abstract
Bacillus sp. 6256 is a good biocontrol agent against Botrytis cinerea which caused tomato gray mold disease. Strain 6256 was identified as B. amyloliquefaciens by analysis of its partial gyrB gene sequence. To identify and characterize the antimycotic peptides from the culture broth of the bacterium, the antimicrobial substances produced by B. amyloliquefaciens 6256 were isolated by ammonium sulfate precipitation, Superdex 200 gel filtration chromatography and DEAE anion exchange chromatography. The purified compound was designated as P657. The biological activity of P657 was stable at as high as 100 °C for 20 min and in pH value ranged from 5 to 10. The antimycotic compound was resistant to trypsin and proteinase K, and could completely inhibit spore germination of Botrytis cinerea in vitro. MALDI-TOF-MS analysis results showed the presence of fengycins A (C16-C17) and fengycins B (C15-C17) isoforms in P657.
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Affiliation(s)
- Qing Xia Zhang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China.
| | - Ying Zhang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Ling Ling He
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Zhao Lin Ji
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Yun Hui Tong
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
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76
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Giamperi L, Bucchini AEA, Ricci D, Papa F, Maggi F. Essential Oil of Achillea ligustica (Asteraceae) as an Antifungal Agent against Phytopathogenic Fungi. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801300918] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The essential oil from the inflorescences of Ligurian yarrow ( Achillea ligustica All., Asteraceae) naturalized in Central Italy was investigated in order to evaluate the antifungal activity against five phytopathogenic fungi. The composition of the essential oil characterized by GC-FID and GC-MS, revealed linalool (24.8%), viridiflorol (9.6%), β-pinene (6.4%), 1,8-cineole (5.8%) and terpinen-4-ol (5.3%) as the major constituents. The antifungal activity was evaluated by the in vitro disc agar diffusion test and Agar vapor assay on 5 microbial strains. The essential oil showed a good antifungal activity against all fungal strains, being a valid candidate in the fight against plant pathogens that harm many traditional crops. The possible incorporation of this essential oil into antifungal preparations with a low environmental impact is hypothesized.
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Affiliation(s)
- Laura Giamperi
- Department of Biomolecular Sciences, Section of Plant Biology, University of Urbino, 61029 Urbino, Italy
| | - Anahi Elena Ada Bucchini
- Department of Biomolecular Sciences, Section of Plant Biology, University of Urbino, 61029 Urbino, Italy
| | - Donata Ricci
- Department of Biomolecular Sciences, Section of Plant Biology, University of Urbino, 61029 Urbino, Italy
| | - Fabrizio Papa
- School of Sciences and Technology, University of Camerino, 62032 Camerino, Italy
| | - Filippo Maggi
- School of Pharmacy, University of Camerino, 62032 Camerino, Italy
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77
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Oliveras À, Baró A, Montesinos L, Badosa E, Montesinos E, Feliu L, Planas M. Antimicrobial activity of linear lipopeptides derived from BP100 towards plant pathogens. PLoS One 2018; 13:e0201571. [PMID: 30052685 PMCID: PMC6063448 DOI: 10.1371/journal.pone.0201571] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 07/17/2018] [Indexed: 01/07/2023] Open
Abstract
A collection of 36 lipopeptides were designed from the cecropin A-melittin hybrid peptide BP100 (H-Lys-Lys-Leu-Phe-Lys-Lys-Ile-Leu-Lys-Tyr-Leu-NH2) previously described with activity against phytopathogenic bacteria. These lipopeptides were synthesized on solid-phase and screened for their antimicrobial activity, toxicity and proteolytic stability. They incorporated a butanoyl, a hexanoyl or a lauroyl group at the N-terminus or at the side chain of a lysine residue placed at each position of the sequence. Their antimicrobial activity and hemolysis depended on the fatty acid length and its position. In particular, lipopeptides containing a butanoyl or a hexanoyl chain exhibited the best biological activity profile. In addition, we observed that the incorporation of the acyl group did not induce the overexpression of defense-related genes in tomato. Best lipopeptides were BP370, BP378, BP381, BP387 and BP389, which were highly active against all the pathogens tested (minimum inhibitory concentration of 0.8 to 12.5 μM), low hemolytic, low phytotoxic and significantly stable to protease degradation. This family of lipopeptides might be promising functional peptides useful for plant protection.
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Affiliation(s)
- Àngel Oliveras
- LIPPSO, Department of Chemistry, University of Girona, Campus Montilivi, Girona, Spain
| | - Aina Baró
- Laboratory of Plant Pathology, Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Campus Montilivi, Girona, Spain
| | - Laura Montesinos
- Laboratory of Plant Pathology, Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Campus Montilivi, Girona, Spain
| | - Esther Badosa
- Laboratory of Plant Pathology, Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Campus Montilivi, Girona, Spain
| | - Emilio Montesinos
- Laboratory of Plant Pathology, Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Campus Montilivi, Girona, Spain
| | - Lidia Feliu
- LIPPSO, Department of Chemistry, University of Girona, Campus Montilivi, Girona, Spain
| | - Marta Planas
- LIPPSO, Department of Chemistry, University of Girona, Campus Montilivi, Girona, Spain
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Chahardoli M, Fazeli A, Niazi A, Ghabooli M. Recombinant expression of LFchimera antimicrobial peptide in a plant-based expression system and its antimicrobial activity against clinical and phytopathogenic bacteria. BIOTECHNOL BIOTEC EQ 2018. [DOI: 10.1080/13102818.2018.1451780] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Mahmood Chahardoli
- Department of Plant Breeding, Faculty of Agriculture, Ilam University, Ilam, Iran
| | - Arash Fazeli
- Department of Plant Breeding, Faculty of Agriculture, Ilam University, Ilam, Iran
| | - Ali Niazi
- Institute of Biotechnology, Shiraz University, Shiraz, Iran
| | - Mehdi Ghabooli
- Department of Agronomy, Faculty of Agriculture, Malayer University, Malayer, Iran
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Rajasekaran K, Sayler RJ, Sickler CM, Majumdar R, Jaynes JM, Cary JW. Control of Aspergillus flavus growth and aflatoxin production in transgenic maize kernels expressing a tachyplesin-derived synthetic peptide, AGM182. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 270:150-156. [PMID: 29576068 DOI: 10.1016/j.plantsci.2018.02.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 01/28/2018] [Accepted: 02/07/2018] [Indexed: 06/08/2023]
Abstract
Aspergillus flavus is an opportunistic, saprophytic fungus that infects maize and other fatty acid-rich food and feed crops and produces toxic and carcinogenic secondary metabolites known as aflatoxins. Contamination of maize with aflatoxin poses a serious threat to human health in addition to reducing the crop value leading to a substantial economic loss. Here we report designing a tachyplesin1-derived synthetic peptide AGM182 and testing its antifungal activity both in vitro and in planta. In vitro studies showed a five-fold increase in antifungal activity of AGM182 (vs. tachyplesin1) against A. flavus. Transgenic maize plants expressing AGM182 under maize Ubiquitin-1 promoter were produced through Agrobacterium-mediated transformation. PCR products confirmed integration of the AGM182 gene, while RT-PCR of maize RNA confirmed the presence of AGM182 transcripts. Maize kernel screening assay using a highly aflatoxigenic A. flavus strain (AF70) showed up to 72% reduction in fungal growth in the transgenic AGM182 seeds compared to isogenic negative control seeds. Reduced fungal growth in the AGM182 transgenic seeds resulted in a significant reduction in aflatoxin levels (76-98%). The results presented here show the power of computational and synthetic biology to rationally design and synthesize an antimicrobial peptide against A. flavus that is effective in reducing fungal growth and aflatoxin contamination in an economically important food and feed crop such as maize.
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Affiliation(s)
- Kanniah Rajasekaran
- Food and Feed Safety Research Unit, USDA-ARS, Southern Regional Research Center, New Orleans, LA 70124, United States.
| | - Ronald J Sayler
- Department of Plant Pathology, University of Arkansas, Fayetteville, AR 72701, United States
| | - Christine M Sickler
- Food and Feed Safety Research Unit, USDA-ARS, Southern Regional Research Center, New Orleans, LA 70124, United States
| | - Rajtilak Majumdar
- Food and Feed Safety Research Unit, USDA-ARS, Southern Regional Research Center, New Orleans, LA 70124, United States
| | - Jesse M Jaynes
- College of Agriculture, Environment and Nutrition Sciences, Tuskegee University, Tuskegee, AL 36088, United States
| | - Jeffrey W Cary
- Food and Feed Safety Research Unit, USDA-ARS, Southern Regional Research Center, New Orleans, LA 70124, United States
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80
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Cui X, Du J, Li J, Wang Z. Inhibitory site of α-hairpinin peptide from tartary buckwheat has no effect on its antimicrobial activities. Acta Biochim Biophys Sin (Shanghai) 2018; 50:408-416. [PMID: 29509838 DOI: 10.1093/abbs/gmy015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Accepted: 01/29/2018] [Indexed: 11/14/2022] Open
Abstract
Antimicrobial peptides (AMPs) are known to play important roles in the innate host defense mechanisms of most living organisms. Protease inhibitors from plants potently inhibit the growth of a variety of pathogenic bacteria and fungi. Therefore, there are excellent candidates for the development of novel antimicrobial agents. In this study, an antimicrobial peptide derived from tartary buckwheat seeds (FtAMP) was obtained by gene cloning, expression and purification, which exhibited inhibitory activity toward trypsin. Furthermore, the relationship between the antimicrobial and inhibitory activities of FtAMP was investigated. Two mutants (FtAMP-R21A and FtAMP-R21F) were generated through site-directed mutagenesis. Inhibitory activity analysis showed that both FtAMP-R21A and FtAMP-R21F lost trypsin-inhibitory activity. However, FtAMP-R21A and FtAMP-R21F showed novel inhibitory activities against elastase and α-chymotrypsin, respectively, suggesting that Arg-21 in the inhibitory site loop is specific for the inhibitory activity of FtAMP against trypsin. Antimicrobial assays showed that all three peptides exhibited strong antifungal activity against Trichoderma koningii, Rhizopus sp., and Fusarium oxysporum. These results showed that the changes in FtAMP inhibitory site have no effect on their antifungal properties.
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Affiliation(s)
- Xiaodong Cui
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Taiyuan 030006, China
- Institute of Biotechnology, Shanxi University, Taiyuan 030006, China
| | - Jingjing Du
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Taiyuan 030006, China
- Institute of Biotechnology, Shanxi University, Taiyuan 030006, China
| | - Jiao Li
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Taiyuan 030006, China
- School of Life Science, Shanxi University, Taiyuan 030006, China
| | - Zhuanhua Wang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Taiyuan 030006, China
- School of Life Science, Shanxi University, Taiyuan 030006, China
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81
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Güell I, Vilà S, Badosa E, Montesinos E, Feliu L, Planas M. Design, synthesis, and biological evaluation of cyclic peptidotriazoles derived from BPC194 as novel agents for plant protection. Biopolymers 2018; 108. [PMID: 28026016 DOI: 10.1002/bip.23012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 12/14/2016] [Accepted: 12/16/2016] [Indexed: 01/17/2023]
Abstract
The search for novel antimicrobial agents to be used for plant protection has prompted us to design analogues incorporating non-natural amino acids. Herein, we designed and synthesized cyclic peptidotriazoles derived from the lead antimicrobial cyclic peptide c(Lys-Lys-Leu3 -Lys-Lys5 -Phe-Lys-Lys-Leu-Gln) (BPC194). In particular, Leu3 and Lys5 were replaced by a triazolyl alanine, a triazolyl norleucine or a triazolyl lysine. These peptides were screened for their antibacterial activity against Xanthomonas axonopodis pv. vesicatoria, Erwinia amylovora, and Pseudomonas syringae pv. syringae, for their hemolysis and for their phytotoxicity. Results showed that the type of triazolyl amino acid and the substituent present at the triazole influenced the antibacterial and hemolytic activities. Moreover, the position of this residue was also crucial for the hemolysis. The lead compounds BPC548 and BPC550 exhibited high antibacterial activity (MIC of 3.1 to 25 μM), low hemolysis (19 and 26% at 375 μM, respectively) and low phytotoxicity. Therefore, these analogues could be used as new leads for the development of effective agents to control pathogenic bacteria responsible for plant diseases of economic importance.
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Affiliation(s)
- Imma Güell
- LIPPSO, Department of Chemistry, University of Girona, Campus Montilivi, 17003, Girona, Spain
| | - Sílvia Vilà
- LIPPSO, Department of Chemistry, University of Girona, Campus Montilivi, 17003, Girona, Spain
| | - Esther Badosa
- Laboratory of Plant Pathology, Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Campus Montilivi, 17003, Girona, Spain
| | - Emilio Montesinos
- Laboratory of Plant Pathology, Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Campus Montilivi, 17003, Girona, Spain
| | - Lidia Feliu
- LIPPSO, Department of Chemistry, University of Girona, Campus Montilivi, 17003, Girona, Spain
| | - Marta Planas
- LIPPSO, Department of Chemistry, University of Girona, Campus Montilivi, 17003, Girona, Spain
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82
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Pina-Pérez M, Ferrús Pérez M. Antimicrobial potential of legume extracts against foodborne pathogens: A review. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2017.12.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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83
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Gao P, Qin J, Li D, Zhou S. Inhibitory effect and possible mechanism of a Pseudomonas strain QBA5 against gray mold on tomato leaves and fruits caused by Botrytis cinerea. PLoS One 2018; 13:e0190932. [PMID: 29320571 PMCID: PMC5761960 DOI: 10.1371/journal.pone.0190932] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 12/24/2017] [Indexed: 02/07/2023] Open
Abstract
The fungal pathogen Botrytis cinerea causes gray mold disease on various hosts, which results in serious economic losses. Over the past several decades, many kinds of fungicides have been used to successfully control the disease. Meanwhile, the uses of fungicides lead to environmental pollution as well as a potential threat to the human health by the chemical residues in tomato fruit. Also, the gray mold disease is difficult to control with fungicides. Therefore, exploring alternative measures such as biological controls could be the best choice to control the disease and alleviate damages caused by fungicides. In this study, we isolated and identified a novel Pseudomonas strain termed as QBA5 from healthy tomato plant based on the morphological, biochemical characteristics and molecular detection. The antifungal activity assays revealed that, in the presence of QBA5, conidia germination, germ tube elongation and mycelial growth of B. cinerea were significantly inhibited. Most importantly, QBA5 exerted a significant preventive effectiveness against gray mold on tomato fruits and plants. The possible mechanism of QBA5 involved in the inhibition of B. cinerea was investigated. It revealed that the conidia plasma membrane of B. cinerea was severely damaged by QBA5. Further, four different antifungal compounds in the supernatant of QBA5 were separated by preparative high performance liquid chromatography (PHPLC). Overall, the data indicate that there is a considerable potential for QBA5 to reduce the damage caused by gray mold disease on tomato.
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Affiliation(s)
- Pan Gao
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, China
| | - Jiaxing Qin
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, China
| | - Delong Li
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, China
- The Key Lab of Integrated Crop Pests Management of Shandong Province, Qingdao Agricultural University, Qingdao, China
| | - Shanyue Zhou
- College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, China
- The Key Lab of Integrated Crop Pests Management of Shandong Province, Qingdao Agricultural University, Qingdao, China
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84
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A Gene Encoding Scots Pine Antimicrobial Protein Sp-AMP2 (PR-19) Confers Increased Tolerance against Botrytis cinerea in Transgenic Tobacco. FORESTS 2017. [DOI: 10.3390/f9010010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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85
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Tryptophan-Containing Cyclic Decapeptides with Activity against Plant Pathogenic Bacteria. Molecules 2017; 22:molecules22111817. [PMID: 29072606 PMCID: PMC6150173 DOI: 10.3390/molecules22111817] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 10/25/2017] [Accepted: 10/25/2017] [Indexed: 12/03/2022] Open
Abstract
A library of 66 cyclic decapeptides incorporating a Trp residue was synthesized on solid phase and screened against the phytopathogenic bacteria Pseudomonas syringae pv. syringae, Xanthomonas axonopodis pv. vesicatoria, and Erwinia amylovora. The hemolytic activity of these peptides was also evaluated. The results obtained were compared with those of a collection of Phe analogues previously reported. The analysis of the data showed that the presence of the Trp improved the antibacterial activity against these three pathogens. In particular, 40 to 46 Trp analogues displayed lower minimum inhibitory concentration (MIC) values than their corresponding Phe counterparts. Interestingly, 26 Trp-containing sequences exhibited MIC of 0.8 to 3.1 μM against X. axonopodis pv. vesicatoria, 21 peptides MIC of 1.6 to 6.2 μM against P. syringae pv. syringae and six peptides MIC of 6.2 to 12.5 μM against E. amylovora. Regarding the hemolysis, in general, Trp derivatives displayed a percentage of hemolysis comparable to that of their Phe analogues. Notably, 49 Trp-containing cyclic peptides showed a hemolysis ≤ 20% at 125 μM. The peptides with the best biological activity profile were c(LKKKLWKKLQ) (BPC086W) and c(LKKKKWLLKQ) (BPC108W), which displayed MIC values ranging from 0.8 to 12.5 μM and a hemolysis ≤ 8% at 125 μM. Therefore, it is evident that these Trp sequences constitute promising candidates for the development of new agents for use in plant protection.
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86
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Hao G, Zhang S, Stover E. Transgenic expression of antimicrobial peptide D2A21 confers resistance to diseases incited by Pseudomonas syringae pv. tabaci and Xanthomonas citri, but not Candidatus Liberibacter asiaticus. PLoS One 2017; 12:e0186810. [PMID: 29049366 PMCID: PMC5648250 DOI: 10.1371/journal.pone.0186810] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 10/06/2017] [Indexed: 11/18/2022] Open
Abstract
Citrus Huanglongbing (HLB) associated with 'Candidatus Liberibacter asiaticus' (Las) and citrus canker disease incited by Xanthomonas citri are the most devastating citrus diseases worldwide. To control citrus HLB and canker disease, we previously screened over forty antimicrobial peptides (AMPs) in vitro for their potential application in genetic engineering. D2A21 was one of the most active AMPs against X. citri, Agrobacterium tumefaciens and Sinorhizobium meliloti with low hemolysis activity. Therefore, we conducted this work to assess transgenic expression of D2A21 peptide to achieve citrus resistant to canker and HLB. We generated a construct expressing D2A21 and initially transformed tobacco as a model plant. Transgenic tobacco expressing D2A21 was obtained by Agrobacterium-mediated transformation. Successful transformation and D2A21 expression was confirmed by molecular analysis. We evaluated disease development incited by Pseudomonas syringae pv. tabaci in transgenic tobacco. Transgenic tobacco plants expressing D2A21 showed remarkable disease resistance compared to control plants. Therefore, we performed citrus transformations with the same construct and obtained transgenic Carrizo citrange. Gene integration and gene expression in transgenic plants were determined by PCR and RT-qPCR. Transgenic Carrizo expressing D2A21 showed significant canker resistance while the control plants showed clear canker symptoms following both leaf infiltration and spray inoculation with X. citri 3213. Transgenic Carrizo plants were challenged for HLB evaluation by grafting with Las infected rough lemon buds. Las titer was determined by qPCR in the leaves and roots of transgenic and control plants. However, our results showed that transgenic plants expressing D2A21 did not significantly reduce Las titer compared to control plants. We demonstrated that transgenic expression of D2A21 conferred resistance to diseases incited by P. syringae pv. tabaci and X. citri but not Las. Our results underscore the difficulty in controlling HLB compared to other bacterial diseases.
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Affiliation(s)
- Guixia Hao
- U. S. Horticultural Research Laboratory, USDA-ARS, Fort Pierce, FL, United States of America
| | - Shujian Zhang
- U. S. Horticultural Research Laboratory, USDA-ARS, Fort Pierce, FL, United States of America
| | - Ed Stover
- U. S. Horticultural Research Laboratory, USDA-ARS, Fort Pierce, FL, United States of America
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87
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Lactolisterin BU, a Novel Class II Broad-Spectrum Bacteriocin from Lactococcus lactis subsp. lactis bv. diacetylactis BGBU1-4. Appl Environ Microbiol 2017; 83:AEM.01519-17. [PMID: 28842543 DOI: 10.1128/aem.01519-17] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 08/20/2017] [Indexed: 11/20/2022] Open
Abstract
Lactococcus lactis subsp. lactis bv. diacetylactis BGBU1-4 produces a novel bacteriocin, lactolisterin BU, with strong antimicrobial activity against many species of Gram-positive bacteria, including important food spoilage and foodborne pathogens, such as Listeria monocytogenes, Staphylococcus aureus, Bacillus spp., and streptococci. Lactolisterin BU was extracted from the cell surface of BGBU1-4 by 2-propanol and purified to homogeneity by C18 solid-phase extraction and reversed-phase high-performance liquid chromatography. The molecular mass of the purified lactolisterin BU was 5,160.94 Da, and an internal fragment, AVSWAWQH, as determined by N-terminal sequencing, showed low-level similarity to existing antimicrobial peptides. Curing and transformation experiments revealed the presence of a corresponding bacteriocin operon on the smallest plasmid, pBU6 (6.2 kb), of strain BGBU1-4. Analysis of the bacteriocin operon revealed a leaderless bacteriocin of 43 amino acids that exhibited similarity to bacteriocin BHT-B (63%) from Streptococcus ratti, a bacteriocin with analogy to aureocin A.IMPORTANCE Lactolisterin BU, a broad-spectrum leaderless bacteriocin produced by L. lactis subsp. lactis bv. diacetylactis BGBU1-4, expresses strong antimicrobial activity against food spoilage and foodborne pathogens, such as Listeria monocytogenes, Staphylococcus aureus, Bacillus spp., and streptococci. Lactolisterin BU showed the highest similarity to aureocin-like bacteriocins produced by different bacteria. The operon for synthesis is located on the smallest plasmid, pBU6 (6.2 kb), of strain BGBU1-4, indicating possible horizontal transfer among producers.
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88
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Lin CH, Pan YC, Liu FW, Chen CY. Prokaryotic expression and action mechanism of antimicrobial LsGRP1 C recombinant protein containing a fusion partner of small ubiquitin-like modifier. Appl Microbiol Biotechnol 2017; 101:8129-8138. [PMID: 28965249 DOI: 10.1007/s00253-017-8530-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 08/29/2017] [Accepted: 09/11/2017] [Indexed: 01/10/2023]
Abstract
Antimicrobial peptides (AMPs) are peptides exhibiting broad-spectrum antimicrobial activities and considered as potential therapeutic agents. LsGRP1C, a novel AMP derived from defense-related LsGRP1 protein of Lilium, was proven to inhibit kinds of bacteria and fungi via alteration of microbial membrane permeability and induction of fungal programmed cell death-like phenomena by in vitro assays using synthetic LsGRP1C. In this study, the prokaryotic production of LsGRP1C recombinant protein containing an N-terminal fusion partner of the yeast small ubiquitin-like modifier (SUMO) was achieved by using optimized Escherichia coli host and purification buffer system, which lead to a high yield of soluble SUMO-LsGRP1C fusion protein. In vitro assay revealed that E. coli-expressed SUMO-LsGRP1C exhibited even better antifungal activity as compared to synthetic LsGRP1C. Meanwhile, the ability of SUMO-LsGRP1C in conducting fungal membrane permeabilization and programmed cell death was verified by SYTOX Green staining and 4',6-diamidino-2-phenylindole staining/terminal deoxynucleotidyl transferase dUTP nick-end labeling assays, respectively, indicating that E. coli-expressed SUMO-LsGRP1C shares identical modes of action with synthetic LsGRP1C. Herein, this E. coli expression system enables the effective and convenient production of antimicrobial LsGRP1C in a form of SUMO-fused recombinant protein.
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Affiliation(s)
- Chia-Hua Lin
- Department of Plant Pathology and Microbiology, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China
| | - Ying-Chieh Pan
- Department of Plant Pathology and Microbiology, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China
| | - Fang-Wei Liu
- Department of Plant Pathology and Microbiology, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China
| | - Chao-Ying Chen
- Department of Plant Pathology and Microbiology, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China.
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89
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Rational Design of Cyclic Antimicrobial Peptides Based on BPC194 and BPC198. Molecules 2017; 22:molecules22071054. [PMID: 28672817 PMCID: PMC6152393 DOI: 10.3390/molecules22071054] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 06/20/2017] [Accepted: 06/22/2017] [Indexed: 11/16/2022] Open
Abstract
A strategy for the design of antimicrobial cyclic peptides derived from the lead compounds c(KKLKKFKKLQ) (BPC194) and c(KLKKKFKKLQ) (BPC198) is reported. First, the secondary β-structure of BPC194 and BPC198 was analyzed by carrying out molecular dynamics (MD) simulations. Then, based on the sequence pattern and the β-structure of BPC194 or BPC198, fifteen analogues were designed and synthesized on solid-phase. The best peptides (BPC490, BPC918, and BPC924) showed minimum inhibitory concentration (MIC) values <6.2 μM against Pseudomonas syringae pv. syringae and Xanthomonas axonopodis pv. vesicatoria, and an MIC value of 12.5 to 25 μM against Erwinia amylovora, being as active as BPC194 and BPC198. Interestingly, these three analogues followed the structural pattern defined from the MD simulations of the parent peptides. Thus, BPC490 maintained the parallel alignment of the hydrophilic pairs K¹-K⁸, K²-K⁷, and K⁴-K⁵, whereas BPC918 and BPC924 included the two hydrophilic interactions K³-Q10 and K⁵-K⁸. In short, MD simulations have proved to be very useful for ascertaining the structural features of cyclic peptides that are crucial for their biological activity. Such approaches could be further employed for the development of new antibacterial cyclic peptides.
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90
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Santos C, Duarte S, Tedesco S, Fevereiro P, Costa RL. Expression Profiling of Castanea Genes during Resistant and Susceptible Interactions with the Oomycete Pathogen Phytophthora cinnamomi Reveal Possible Mechanisms of Immunity. FRONTIERS IN PLANT SCIENCE 2017; 8:515. [PMID: 28443110 PMCID: PMC5387079 DOI: 10.3389/fpls.2017.00515] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 03/23/2017] [Indexed: 05/28/2023]
Abstract
The most dangerous pathogen affecting the production of chestnuts is Phytophthora cinnamomi a hemibiotrophic that causes root rot, also known as ink disease. Little information has been acquired in chestnut on the molecular defense strategies against this pathogen. The expression of eight candidate genes potentially involved in the defense to P. cinnamomi was quantified by digital PCR in Castanea genotypes showing different susceptibility to the pathogen. Seven of the eight candidate genes displayed differentially expressed levels depending on genotype and time-point after inoculation. Cast_Gnk2-like revealed to be the most expressed gene across all experiments and the one that best discriminates between susceptible and resistant genotypes. Our data suggest that the pre-formed defenses are crucial for the resistance of C. crenata to P. cinnamomi. A lower and delayed expression of the eight studied genes was found in the susceptible Castanea sativa, which may be related with the establishment and spread of the disease in this species. A working model integrating the obtained results is presented.
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Affiliation(s)
- Carmen Santos
- Molecular Biology Lab, Instituto Nacional de Investigação Agrária e Veterinária, I.P.Oeiras, Portugal
- Plant Cell Biotechnology Lab, Instituto de Tecnologia Química e Biológica António Xavier (Green-it Unit), Universidade Nova de LisboaOeiras, Portugal
| | - Sofia Duarte
- Molecular Biology Lab, Instituto Nacional de Investigação Agrária e Veterinária, I.P.Oeiras, Portugal
| | - Sara Tedesco
- Molecular Biology Lab, Instituto Nacional de Investigação Agrária e Veterinária, I.P.Oeiras, Portugal
| | - Pedro Fevereiro
- Plant Cell Biotechnology Lab, Instituto de Tecnologia Química e Biológica António Xavier (Green-it Unit), Universidade Nova de LisboaOeiras, Portugal
- Departamento Biologia Vegetal, Faculdade de Ciências da Universidade de LisboaCampo Grande, Portugal
| | - Rita L. Costa
- Molecular Biology Lab, Instituto Nacional de Investigação Agrária e Veterinária, I.P.Oeiras, Portugal
- Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa - Tapada da AjudaLisboa, Portugal
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91
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Montesinos L, Bundó M, Badosa E, San Segundo B, Coca M, Montesinos E. Production of BP178, a derivative of the synthetic antibacterial peptide BP100, in the rice seed endosperm. BMC PLANT BIOLOGY 2017; 17:63. [PMID: 28292258 PMCID: PMC5351061 DOI: 10.1186/s12870-017-1011-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 03/06/2017] [Indexed: 05/20/2023]
Abstract
BACKGROUND BP178 peptide is a synthetic BP100-magainin derivative possessing strong inhibitory activity against plant pathogenic bacteria, offering a great potential for future applications in plant protection and other fields. Here we report the production and recovery of a bioactive BP178 peptide using rice seeds as biofactories. RESULTS A synthetic gene encoding the BP178 peptide was prepared and introduced in rice plants. The gene was efficiently expressed in transgenic rice under the control of an endosperm-specific promoter. Among the three endosperm-specific rice promoters (Glutelin B1, Glutelin B4 or Globulin 1), best results were obtained when using the Globulin 1 promoter. The BP178 peptide accumulated in the seed endosperm and was easily recovered from rice seeds using a simple procedure with a yield of 21 μg/g. The transgene was stably inherited for at least three generations, and peptide accumulation remained stable during long term storage of transgenic seeds. The purified peptide showed in vitro activity against the bacterial plant pathogen Dickeya sp., the causal agent of the dark brown sheath rot of rice. Seedlings of transgenic events showed enhanced resistance to the fungal pathogen Fusarium verticillioides, supporting that the in planta produced peptide was biologically active. CONCLUSIONS The strategy developed in this work for the sustainable production of BP178 peptide using rice seeds as biofactories represents a promising system for future production of peptides for plant protection and possibly in other fields.
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Affiliation(s)
- Laura Montesinos
- Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Girona, 17071 Spain
| | - Mireia Bundó
- Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB. Edifici CRAG, Campus de la UAB, 08193 Bellaterra, Barcelona Spain
| | - Esther Badosa
- Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Girona, 17071 Spain
| | - Blanca San Segundo
- Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB. Edifici CRAG, Campus de la UAB, 08193 Bellaterra, Barcelona Spain
| | - María Coca
- Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB. Edifici CRAG, Campus de la UAB, 08193 Bellaterra, Barcelona Spain
| | - Emilio Montesinos
- Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Girona, 17071 Spain
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92
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Cabrefiga J, Montesinos E. Lysozyme enhances the bactericidal effect of BP100 peptide against Erwinia amylovora, the causal agent of fire blight of rosaceous plants. BMC Microbiol 2017; 17:39. [PMID: 28212623 PMCID: PMC5316217 DOI: 10.1186/s12866-017-0957-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 02/14/2017] [Indexed: 11/24/2022] Open
Abstract
Background Fire blight is an important disease affecting rosaceous plants. The causal agent is the bacteria Erwinia amylovora which is poorly controlled with the use of conventional bactericides and biopesticides. Antimicrobial peptides (AMPs) have been proposed as a new compounds suitable for plant disease control. BP100, a synthetic linear undecapeptide (KKLFKKILKYL-NH2), has been reported to be effective against E. amylovora infections. Moreover, BP100 showed bacteriolytic activity, moderate susceptibility to protease degradation and low toxicity. However, the peptide concentration required for an effective control of infections in planta is too high due to some inactivation by tissue components. This is a limitation beause of the high cost of synthesis of this compound. We expected that the combination of BP100 with lysozyme may produce a synergistic effect, enhancing its activity and reducing the effective concentration needed for fire blight control. Results The combination of a synhetic multifunctional undecapeptide (BP100) with lysozyme produces a synergistic effect. We showed a significant increase of the antimicrobial activity against E. amylovora that was associated to the increase of cell membrane damage and to the reduction of cell metabolism. Combination of BP100 with lysozyme reduced the time required to achieve cell death and the minimal inhibitory concentration (MIC), and increased the activity of BP100 in the presence of leaf extracts even when the peptide was applied at low doses. The results obtained in vitro were confirmed in leaf infection bioassays. Conclusions The combination of BP100 with lysozyme showed synergism on the bactericidal activity against E. amylovora and provide the basis for developing better formulations of antibacterial peptides for plant protection.
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Affiliation(s)
- Jordi Cabrefiga
- Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Girona, 17003, Spain
| | - Emilio Montesinos
- Institute of Food and Agricultural Technology-CIDSAV-XaRTA, University of Girona, Girona, 17003, Spain.
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93
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Meneguetti BT, Machado LDS, Oshiro KGN, Nogueira ML, Carvalho CME, Franco OL. Antimicrobial Peptides from Fruits and Their Potential Use as Biotechnological Tools-A Review and Outlook. Front Microbiol 2017; 7:2136. [PMID: 28119671 PMCID: PMC5223440 DOI: 10.3389/fmicb.2016.02136] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 12/19/2016] [Indexed: 12/20/2022] Open
Abstract
Bacterial resistance is a major threat to plant crops, animals and human health, and over the years this situation has increasingly spread worldwide. Due to their many bioactive compounds, plants are promising sources of antimicrobial compounds that can potentially be used in the treatment of infections caused by microorganisms. As well as stem, flowers and leaves, fruits have an efficient defense mechanism against pests and pathogens, besides presenting nutritional and functional properties due to their multifunctional molecules. Among such compounds, the antimicrobial peptides (AMPs) feature different antimicrobials that are capable of disrupting the microbial membrane and of acting in binding to intra-cytoplasmic targets of microorganisms. They are therefore capable of controlling or halting the growth of microorganisms. In summary, this review describes the major classes of AMPs found in fruits, their possible use as biotechnological tools and prospects for the pharmaceutical industry and agribusiness.
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Affiliation(s)
- Beatriz T Meneguetti
- S-Inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco Campo Grande, Brazil
| | - Leandro Dos Santos Machado
- S-Inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco Campo Grande, Brazil
| | - Karen G N Oshiro
- S-Inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco Campo Grande, Brazil
| | - Micaella L Nogueira
- Graduação em Ciências Biológicas, Universidade Católica Dom Bosco Campo Grande, Brazil
| | - Cristiano M E Carvalho
- S-Inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom BoscoCampo Grande, Brazil; Graduação em Ciências Biológicas, Universidade Católica Dom BoscoCampo Grande, Brazil
| | - Octávio L Franco
- S-Inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom BoscoCampo Grande, Brazil; Graduação em Ciências Biológicas, Universidade Católica Dom BoscoCampo Grande, Brazil; Centro de Análises Proteômicas e Bioquímicas, Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de BrasíliaBrasília, Brazil
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94
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Games PD, daSilva EQG, Barbosa MDO, Almeida-Souza HO, Fontes PP, deMagalhães-Jr MJ, Pereira PRG, Prates MV, Franco GR, Faria-Campos A, Campos SVA, Baracat-Pereira MC. Computer aided identification of a Hevein-like antimicrobial peptide of bell pepper leaves for biotechnological use. BMC Genomics 2016; 17:999. [PMID: 28105928 PMCID: PMC5249031 DOI: 10.1186/s12864-016-3332-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Antimicrobial peptides from plants present mechanisms of action that are different from those of conventional defense agents. They are under-explored but have a potential as commercial antimicrobials. Bell pepper leaves ('Magali R') are discarded after harvesting the fruit and are sources of bioactive peptides. This work reports the isolation by peptidomics tools, and the identification and partially characterization by computational tools of an antimicrobial peptide from bell pepper leaves, and evidences the usefulness of records and the in silico analysis for the study of plant peptides aiming biotechnological uses. RESULTS Aqueous extracts from leaves were enriched in peptide by salt fractionation and ultrafiltration. An antimicrobial peptide was isolated by tandem chromatographic procedures. Mass spectrometry, automated peptide sequencing and bioinformatics tools were used alternately for identification and partial characterization of the Hevein-like peptide, named HEV-CANN. The computational tools that assisted to the identification of the peptide included BlastP, PSI-Blast, ClustalOmega, PeptideCutter, and ProtParam; conventional protein databases (DB) as Mascot, Protein-DB, GenBank-DB, RefSeq, Swiss-Prot, and UniProtKB; specific for peptides DB as Amper, APD2, CAMP, LAMPs, and PhytAMP; other tools included in ExPASy for Proteomics; The Bioactive Peptide Databases, and The Pepper Genome Database. The HEV-CANN sequence presented 40 amino acid residues, 4258.8 Da, theoretical pI-value of 8.78, and four disulfide bonds. It was stable, and it has inhibited the growth of phytopathogenic bacteria and a fungus. HEV-CANN presented a chitin-binding domain in their sequence. There was a high identity and a positive alignment of HEV-CANN sequence in various databases, but there was not a complete identity, suggesting that HEV-CANN may be produced by ribosomal synthesis, which is in accordance with its constitutive nature. CONCLUSIONS Computational tools for proteomics and databases are not adjusted for short sequences, which hampered HEV-CANN identification. The adjustment of statistical tests in large databases for proteins is an alternative to promote the significant identification of peptides. The development of specific DB for plant antimicrobial peptides, with information about peptide sequences, functional genomic data, structural motifs and domains of molecules, functional domains, and peptide-biomolecule interactions are valuable and necessary.
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Affiliation(s)
- Patrícia Dias Games
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Viçosa, MG 36570-900 Brazil
| | | | - Meire de Oliveira Barbosa
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Viçosa, MG 36570-900 Brazil
| | | | - Patrícia Pereira Fontes
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Viçosa, MG 36570-900 Brazil
| | - Marcos Jorge deMagalhães-Jr
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Viçosa, MG 36570-900 Brazil
| | | | - Maura Vianna Prates
- Embrapa Genetic Resources & Biotechnology, Brazilian Agricultural Research Corporation, Brasília, DF 70770-900 Brazil
| | - Gloria Regina Franco
- Department of Biochemistry and Immunology-ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG 31270-901 Brazil
| | - Alessandra Faria-Campos
- Department of Computer Science-ICEX, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG 31270-901 Brazil
| | - Sérgio Vale Aguiar Campos
- Department of Computer Science-ICEX, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG 31270-901 Brazil
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95
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Sundin GW, Castiblanco LF, Yuan X, Zeng Q, Yang C. Bacterial disease management: challenges, experience, innovation and future prospects: Challenges in Bacterial Molecular Plant Pathology. MOLECULAR PLANT PATHOLOGY 2016; 17:1506-1518. [PMID: 27238249 PMCID: PMC6638406 DOI: 10.1111/mpp.12436] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Plant diseases caused by bacterial pathogens place major constraints on crop production and cause significant annual losses on a global scale. The attainment of consistent effective management of these diseases can be extremely difficult, and management potential is often affected by grower reliance on highly disease-susceptible cultivars because of consumer preferences, and by environmental conditions favouring pathogen development. New and emerging bacterial disease problems (e.g. zebra chip of potato) and established problems in new geographical regions (e.g. bacterial canker of kiwifruit in New Zealand) grab the headlines, but the list of bacterial disease problems with few effective management options is long. The ever-increasing global human population requires the continued stable production of a safe food supply with greater yields because of the shrinking areas of arable land. One major facet in the maintenance of the sustainability of crop production systems with predictable yields involves the identification and deployment of sustainable disease management solutions for bacterial diseases. In addition, the identification of novel management tactics has also come to the fore because of the increasing evolution of resistance to existing bactericides. A number of central research foci, involving basic research to identify critical pathogen targets for control, novel methodologies and methods of delivery, are emerging that will provide a strong basis for bacterial disease management into the future. Near-term solutions are desperately needed. Are there replacement materials for existing bactericides that can provide effective disease management under field conditions? Experience should inform the future. With prior knowledge of bactericide resistance issues evolving in pathogens, how will this affect the deployment of newer compounds and biological controls? Knowledge is critical. A comprehensive understanding of bacterial pathosystems is required to not only identify optimal targets in the pathogens, but also optimal seasonal timings for deployment. Host resistance to effectors must be exploited, carefully and correctly. Are there other candidate genes that could be targeted in transgenic approaches? How can new technologies (CRISPR, TALEN, etc.) be most effectively used to add sustainable disease resistance to existing commercially desirable plant cultivars? We need an insider's perspective on the management of systemic pathogens. In addition to host resistance or reduced sensitivity, are there other methods that can be used to target these pathogen groups? Biological systems are variable. Can biological control strategies be improved for bacterial disease management and be made more predictable in function? The answers to the research foci outlined above are not all available, as will become apparent in this article, but we are heading in the right direction. In this article, we summarize the contributions from past experiences in bacterial disease management, and also describe how advances in bacterial genetics, genomics and host-pathogen interactions are informing novel strategies in virulence inhibition and in host resistance. We also outline potential innovations that could be exploited as the pressures to maximize a safe and productive food supply continue to become more numerous and more complex.
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Affiliation(s)
- George W. Sundin
- Department of Plant, Soil, and Microbial SciencesMichigan State UniversityEast LansingMI48824USA
| | - Luisa F. Castiblanco
- Department of Plant, Soil, and Microbial SciencesMichigan State UniversityEast LansingMI48824USA
| | - Xiaochen Yuan
- Department of Biological SciencesUniversity of Wisconsin‐MilwaukeeMilwaukeeWI53211USA
| | - Quan Zeng
- Department of Plant Pathology and Ecology, Connecticut Agricultural Experiment StationNew HavenCT06504USA
| | - Ching‐Hong Yang
- Department of Biological SciencesUniversity of Wisconsin‐MilwaukeeMilwaukeeWI53211USA
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96
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Lipsky A, Joshi JR, Carmi N, Yedidia I. Expression levels of antimicrobial peptide tachyplesin I in transgenic Ornithogalum lines affect the resistance to Pectobacterium infection. J Biotechnol 2016; 238:22-29. [PMID: 27639550 DOI: 10.1016/j.jbiotec.2016.09.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 09/08/2016] [Accepted: 09/13/2016] [Indexed: 10/21/2022]
Abstract
The genus Ornithogalum includes several ornamental species that suffer substantial losses from bacterial soft rot caused by Pectobacteria. The absence of effective control measures for use against soft rot bacteria led to the initiation of a project in which a small antimicrobial peptide from an Asian horseshoe crab, tachyplesin (tpnI), was introduced into two commercial cultivars: O. dubium and O. thyrsoides. Disease severity and bacterial colonization were examined in transgenic lines expressing this peptide. Disease resistance was evaluated in six lines of each species by measuring bacterial proliferation in the plant tissue. Three transgenic lines of each species were subjected to further analysis in which the expression level of the transgene was evaluated using RT-PCR and qRT-PCR. The development of disease symptoms and bacterial colonization of the plant tissue were also examined using GFP-expressing strain of P. carotovorum subsp. brasiliense Pcb3. Confocal-microscopy imaging revealed significantly reduced quantities of bacterial cells in the transgenic plant lines that had been challenged with the bacterium. The results clearly demonstrate that tpnI expression reduces bacterial proliferation, colonization and disease symptom (reduced by 95-100%) in the transgenic plant tissues. The quantity of tpnI transcripts, as measured by qRT-PCR, was negatively correlated with the protection afforded to the plants, as measured by the reduced severity of disease symptoms in the tissue.
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Affiliation(s)
- Alexander Lipsky
- Department of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
| | - Janak Raj Joshi
- Department of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel; Department of Plant Pathology and Microbiology and the Otto Warburg Minerva Center for Agricultural Biotechnology, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Nir Carmi
- Department of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
| | - Iris Yedidia
- Department of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel.
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97
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Zakharchenko NS, Rukavtsova EB, Shevchuk TV, Furs OV, Pigoleva SV, Lebedeva AA, Chulina IA, Baidakova LK, Bur’yanov YI. The obtainment and characteristics of Kalanchoe pinnata L. plants expressing the artificial gene of the cecropin P1 antimicrobial peptide. APPL BIOCHEM MICRO+ 2016. [DOI: 10.1134/s0003683816040189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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98
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Cameron A, De Zoysa GH, Sarojini V. Antimicrobial peptides against Pseudomonas syringae pv. actinidiae and Erwinia amylovora: Chemical synthesis, secondary structure, efficacy, and mechanistic investigations. Biopolymers 2016; 102:88-96. [PMID: 24122768 DOI: 10.1002/bip.22423] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 09/09/2013] [Accepted: 09/18/2013] [Indexed: 02/01/2023]
Abstract
We report on structurally modified dodecapeptide amides (KYKLFKKILKFL-NH2) and two analogs of a hexapeptide amide (WRWYCR-NH2) with antibacterial activity against the Gram negative pathogens Pseudomonas syringae pv. actinidiae (Psa) and Erwinia amylovora (Ea). Dodecapeptide minimal inhibitory concentrations (MICs) ranged from 3.2 to 15.4 µM, with the unmodified peptide being the most potent against both pathogens. The unmodified dodecapeptide also had 32-58% α-helicity in membrane mimetic environments (50% v/v trifluoroethanol and 30 mM SDS micelles). Structural modifications which included branching, acylation, and conjugation with 5-nitro-2-furaldehyde (NFA) proved detrimental to both antimicrobial activity and α-helicity. Scanning electron microscopy (SEM) revealed distinct morphological changes to bacterial cells treated with the different peptides, leading to blistering of the membrane and cell lysis. MICs of the hexapeptide amide were 3.9-7.7 µM against both pathogens. The hexapeptide acid did not show anti-bacterial activity against either pathogen. However, the NFA conjugated hexapeptide acid was more active than the parent peptide or NFA alone with MICs of 1.6-3.2 µM against the pathogens. SEM analysis revealed shriveling and collapse of bacterial cells treated with the hexapeptide, whereas shortening and compactness on exposure to streptomycin. A colorimetric assay demonstrated that the dodecapeptides were likely to act by targeting the bacterial membrane, whereas the hexapeptides, streptomycin, and NFA were not, thereby supporting the morphological changes observed during SEM. To the best of our knowledge, this appears to be the first report of antimicrobial peptide activity against Psa, a pathogen that is currently devastating the kiwifruit industry internationally.
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Affiliation(s)
- Alan Cameron
- School of Chemical Sciences, The University of Auckland, Private Bag, 92019, Auckland, New Zealand
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99
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Holtappels M, Vrancken K, Noben J, Remans T, Schoofs H, Deckers T, Valcke R. The in planta proteome of wild type strains of the fire blight pathogen, Erwinia amylovora. J Proteomics 2016; 139:1-12. [DOI: 10.1016/j.jprot.2016.02.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 02/13/2016] [Accepted: 02/17/2016] [Indexed: 12/20/2022]
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100
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Synthetic Cyclolipopeptides Selective against Microbial, Plant and Animal Cell Targets by Incorporation of D-Amino Acids or Histidine. PLoS One 2016; 11:e0151639. [PMID: 27008420 PMCID: PMC4805166 DOI: 10.1371/journal.pone.0151639] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 03/02/2016] [Indexed: 12/13/2022] Open
Abstract
Cyclolipopeptides derived from the antimicrobial peptide c(Lys-Lys-Leu-Lys-Lys-Phe-Lys-Lys-Leu-Gln) (BPC194) were prepared on solid-phase and screened against four plant pathogens. The incorporation at Lys5 of fatty acids of 4 to 9 carbon atoms led to active cyclolipopeptides. The influence on the antimicrobial activity of the Lys residue that is derivatized was also evaluated. In general, acylation of Lys1, Lys2 or Lys5 rendered the sequences with the highest activity. Incorporation of a D-amino acid maintained the antimicrobial activity while significantly reduced the hemolysis. Replacement of Phe with a His also yielded cyclolipopeptides with low hemolytic activity. Derivatives exhibiting low phytotoxicity in tobacco leaves were also found. Interestingly, sequences with or without significant activity against phytopathogenic bacteria and fungi, but with differential hemolysis and phytotoxicity were identified. Therefore, this study represents an approach to the development of bioactive peptides with selective activity against microbial, plant and animal cell targets. These selective cyclolipopeptides are candidates useful not only to combat plant pathogens but also to be applied in other fields.
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