1
|
Ma Z, Zhang D, Cheng Z, Niu Y, Kong L, Lu Z, Bie X. Designed symmetrical β-hairpin peptides for treating multidrug-resistant salmonella typhimurium infections. Eur J Med Chem 2022; 243:114769. [PMID: 36137364 DOI: 10.1016/j.ejmech.2022.114769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 08/28/2022] [Accepted: 09/09/2022] [Indexed: 11/28/2022]
Abstract
The rapid emergence and prevalence of multidrug-resistant salmonellosis lack effective therapies, which causes epidemic health problems and stimulates the development of antimicrobials with novel modes of action. In this research, 10 short symmetrical β-hairpin peptides are synthesized by combining the β-turn of Leucocin-A with recurring hydrophobic and cationic amino acid sequences. Those designed peptides exhibited potent antibacterial activities against drug-susceptible and drug-resistant Salmonella. One of the 10 peptides, WK2 ((WK)2CTKSGC(KW)2), displayed best cell selectivity towards Salmonella cells over macrophages and erythrocytes in a co-culture model. Fluorescent measurements and microscopic observations reflected that WK2 exerted its antimicrobial activity through a membrane-lytic mechanism. Moreover, the β-hairpin peptides can bind to endotoxin (LPS) and suppress the production of LPS-induced proinflammatory cytokines in RAW264.7 cells, indicating as a potent anti-inflammatory activity. The preliminary in vivo studies can also demonstrate that WK2 decreased loads of Salmonella in the liver and spleen, mitigated Salmonella-caused inflammation and maintained the integrity of intestinal mucosal surfaces. Ultimately, the results highlight that WK2 is a promising therapeutic agent to prevent multidrug-resistant S. Typhimurium infections in humans and animals.
Collapse
Affiliation(s)
- Zhi Ma
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China; College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Dong Zhang
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Ziyi Cheng
- Faculty of Cell and Molecular Biology, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Yandong Niu
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4Z6, Canada
| | - Liangyu Kong
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhaoxin Lu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xiaomei Bie
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China.
| |
Collapse
|
2
|
Balandin SV, Sheremeteva EV, Ovchinnikova TV. Pediocin-Like Antimicrobial Peptides of Bacteria. BIOCHEMISTRY (MOSCOW) 2019; 84:464-478. [PMID: 31234762 DOI: 10.1134/s000629791905002x] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Bacteriocins are bacterial antimicrobial peptides that, unlike classical peptide antibiotics, are products of ribosomal synthesis and usually have a narrow spectrum of antibacterial activity against species closely related to the producers. Pediocin-like bacteriocins (PLBs) belong to the class IIa of the bacteriocins of Gram-positive bacteria. PLBs possess high activity against pathogenic bacteria from Listeria and Enterococcus genera. Molecular target for PLBs is a membrane protein complex - bacterial mannose-phosphotransferase. PLBs can be synthesized by components of symbiotic microflora and participate in the maintenance of homeostasis in various compartments of the digestive tract and on the surface of epithelial tissues contacting the external environment. PLBs could give a rise to a new group of antibiotics of narrow spectrum of activity.
Collapse
Affiliation(s)
- S V Balandin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia
| | - E V Sheremeteva
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia
| | - T V Ovchinnikova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia.
| |
Collapse
|
3
|
Acedo JZ, Chiorean S, Vederas JC, van Belkum MJ. The expanding structural variety among bacteriocins from Gram-positive bacteria. FEMS Microbiol Rev 2019; 42:805-828. [PMID: 30085042 DOI: 10.1093/femsre/fuy033] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 07/30/2018] [Indexed: 12/21/2022] Open
Abstract
Bacteria use various strategies to compete in an ecological niche, including the production of bacteriocins. Bacteriocins are ribosomally synthesized antibacterial peptides, and it has been postulated that the majority of Gram-positive bacteria produce one or more of these natural products. Bacteriocins can be used in food preservation and are also considered as potential alternatives to antibiotics. The majority of bacteriocins from Gram-positive bacteria had been traditionally divided into two major classes, namely lantibiotics, which are post-translationally modified bacteriocins, and unmodified bacteriocins. The last decade has seen an expanding number of ribosomally synthesized and post-translationally modified peptides (RiPPs) in Gram-positive bacteria that have antibacterial activity. These include linear azol(in)e-containing peptides, thiopeptides, bottromycins, glycocins, lasso peptides and lipolanthines. In addition, the three-dimensional (3D) structures of a number of modified and unmodified bacteriocins have been elucidated in recent years. This review gives an overview on the structural variety of bacteriocins from Gram-positive bacteria. It will focus on the chemical and 3D structures of these peptides, and their interactions with receptors and membranes, structure-function relationships and possible modes of action.
Collapse
Affiliation(s)
- Jeella Z Acedo
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, T6G 2G2, Canada
| | - Sorina Chiorean
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, T6G 2G2, Canada
| | - John C Vederas
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, T6G 2G2, Canada
| | - Marco J van Belkum
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, T6G 2G2, Canada
| |
Collapse
|
4
|
Abdel Monaim SAH, Somboro AM, El-Faham A, de la Torre BG, Albericio F. Bacteria Hunt Bacteria through an Intriguing Cyclic Peptide. ChemMedChem 2018; 14:24-51. [PMID: 30394699 DOI: 10.1002/cmdc.201800597] [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: 09/04/2018] [Revised: 10/10/2018] [Indexed: 12/15/2022]
Abstract
In the last few decades, peptides have been victorious over small molecules as therapeutics due to their broad range of applications, high biological activity, and high specificity. However, the main challenges to overcome if peptides are to become effective drugs is their low oral bioavailability and instability under physiological conditions. Cyclic peptides play a vital role in this context because they show higher stability under physiological conditions, higher membrane permeability, and greater oral bioavailability than that of their corresponding linear analogues. In this regard, cyclic antimicrobial peptides (AMPs) have gained considerable attention in the field of novel antibiotic development. Bacterial strains produce cyclic AMPs through two pathways: ribosomal and nonribosomal. This review provides an overview of the chemical classification of cyclic AMPs isolated from bacteria, and provides a description of their biological activity and mode of action.
Collapse
Affiliation(s)
- Shimaa A H Abdel Monaim
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, 4041, South Africa.,Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Durban, 4001, South Africa
| | - Anou M Somboro
- Biomedical Resource Unit, School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, 4041, South Africa
| | - Ayman El-Faham
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia.,Chemistry Department, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria, 12321, Egypt
| | - Beatriz G de la Torre
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, 4041, South Africa
| | - Fernando Albericio
- Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Durban, 4001, South Africa.,Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia.,CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, and Department of Organic Chemistry, University of Barcelona, Barcelona, 08028, Spain
| |
Collapse
|
5
|
Bioinspired Designs, Molecular Premise and Tools for Evaluating the Ecological Importance of Antimicrobial Peptides. Pharmaceuticals (Basel) 2018; 11:ph11030068. [PMID: 29996512 PMCID: PMC6161137 DOI: 10.3390/ph11030068] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/06/2018] [Accepted: 07/07/2018] [Indexed: 02/07/2023] Open
Abstract
This review article provides an overview of recent developments in antimicrobial peptides (AMPs), summarizing structural diversity, potential new applications, activity targets and microbial killing responses in general. The use of artificial and natural AMPs as templates for rational design of peptidomimetics are also discussed and some strategies are put forward to curtail cytotoxic effects against eukaryotic cells. Considering the heat-resistant nature, chemical and proteolytic stability of AMPs, we attempt to summarize their molecular targets, examine how these macromolecules may contribute to potential environmental risks vis-à-vis the activities of the peptides. We further point out the evolutional characteristics of the macromolecules and indicate how they can be useful in designing target-specific peptides. Methods are suggested that may help to assess toxic mechanisms of AMPs and possible solutions are discussed to promote the development and application of AMPs in medicine. Even if there is wide exposure to the environment like in the hospital settings, AMPs may instead contribute to prevent healthcare-associated infections so long as ecotoxicological aspects are considered.
Collapse
|
6
|
Collins FWJ, Mesa-Pereira B, O'Connor PM, Rea MC, Hill C, Ross RP. Reincarnation of Bacteriocins From the Lactobacillus Pangenomic Graveyard. Front Microbiol 2018; 9:1298. [PMID: 30013519 PMCID: PMC6036575 DOI: 10.3389/fmicb.2018.01298] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 05/28/2018] [Indexed: 12/18/2022] Open
Abstract
Bacteria commonly produce narrow spectrum bacteriocins as a means of inhibiting closely related species competing for similar resources in an environment. The increasing availability of genomic data means that it is becoming easier to identify bacteriocins encoded within genomes. Often, however, the presence of bacteriocin genes in a strain does not always translate into biological antimicrobial activity. For example, when analysing the Lactobacillus pangenome we identified strains encoding ten pediocin-like bacteriocin structural genes which failed to display inhibitory activity. Nine of these bacteriocins were novel whilst one was identified as the previously characterized bacteriocin “penocin A.” The composition of these bacteriocin operons varied between strains, often with key components missing which are required for bacteriocin production, such as dedicated bacteriocin transporters and accessory proteins. In an effort to functionally express these bacteriocins, the structural genes for the ten pediocin homologs were cloned alongside the dedicated pediocin PA-1 transporter in both Escherichia coli and Lactobacillus paracasei heterologous hosts. Each bacteriocin was cloned with its native leader sequence and as a fusion protein with the pediocin PA-1 leader sequence. Several of these bacteriocins displayed a broader spectrum of inhibition than the original pediocin PA-1. We show how potentially valuable bacteriocins can easily be “reincarnated” from in silico data and produced in vitro despite often lacking the necessary accompanying machinery. Moreover, the study demonstrates how genomic datasets such as the Lactobacilus pangenome harbor a potential “arsenal” of antimicrobial activity with the possibility of being activated when expressed in more genetically amenable hosts.
Collapse
Affiliation(s)
- Fergus W J Collins
- Teagasc Food Research Centre, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Cork, Ireland.,Department of Microbiology, University College Cork, Cork, Ireland
| | - Beatriz Mesa-Pereira
- Teagasc Food Research Centre, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Paula M O'Connor
- Teagasc Food Research Centre, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Mary C Rea
- Teagasc Food Research Centre, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Colin Hill
- APC Microbiome Ireland, University College Cork, Cork, Ireland.,Department of Microbiology, University College Cork, Cork, Ireland
| | - R Paul Ross
- Teagasc Food Research Centre, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Cork, Ireland.,Department of Microbiology, University College Cork, Cork, Ireland
| |
Collapse
|
7
|
Bédard F, Hammami R, Zirah S, Rebuffat S, Fliss I, Biron E. Synthesis, antimicrobial activity and conformational analysis of the class IIa bacteriocin pediocin PA-1 and analogs thereof. Sci Rep 2018; 8:9029. [PMID: 29899567 PMCID: PMC5998028 DOI: 10.1038/s41598-018-27225-3] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 05/29/2018] [Indexed: 12/25/2022] Open
Abstract
The antimicrobial peptide pediocin PA-1 is a class IIa bacteriocin that inhibits several clinically relevant pathogens including Listeria spp. Here we report the synthesis and characterization of whole pediocin PA-1 and novel analogs thereof using a combination of solid- and solution-phase strategies to overcome difficulties due to instability and undesired reactions. Pediocin PA-1 thus synthesized was a potent inhibitor of Listeria monocytogenes (MIC = 6.8 nM), similar to the bacteriocin produced naturally by Pediococcus acidilactici. Of particular interest is that linear analogs lacking both of the disulfide bridges characterizing pediocin PA-1 were as potent. One linear analog was also a strong inhibitor of Clostridium perfringens, another important food-borne pathogen. These results are discussed in light of conformational information derived from circular dichroism, solution NMR spectroscopy and structure-activity relationship studies.
Collapse
Affiliation(s)
- François Bédard
- Faculté de pharmacie, Université Laval and Laboratoire de chimie médicinale, Centre de recherche du CHU de Québec, 2705 Boulevard Laurier, Québec, Québec, G1V 0A6, Canada
- STELA Dairy Research Centre, Institute of Nutrition and Functional Foods, Université Laval, Québec, Québec, G1V 0A6, Canada
| | - Riadh Hammami
- STELA Dairy Research Centre, Institute of Nutrition and Functional Foods, Université Laval, Québec, Québec, G1V 0A6, Canada
- School of Nutrition Sciences, University of Ottawa, Ottawa, ON, Canada, K1N 6N5
| | - Séverine Zirah
- Molécules de Communication et Adaptation des Microorganismes (MCAM, UMR 7245), Muséum national d'Histoire Naturelle, Sorbonne Universités, CNRS, CP 54, 57 rue Cuvier, 75005, Paris, France
| | - Sylvie Rebuffat
- Molécules de Communication et Adaptation des Microorganismes (MCAM, UMR 7245), Muséum national d'Histoire Naturelle, Sorbonne Universités, CNRS, CP 54, 57 rue Cuvier, 75005, Paris, France
| | - Ismail Fliss
- STELA Dairy Research Centre, Institute of Nutrition and Functional Foods, Université Laval, Québec, Québec, G1V 0A6, Canada
| | - Eric Biron
- Faculté de pharmacie, Université Laval and Laboratoire de chimie médicinale, Centre de recherche du CHU de Québec, 2705 Boulevard Laurier, Québec, Québec, G1V 0A6, Canada.
| |
Collapse
|
8
|
Towle KM, Vederas JC. Structural features of many circular and leaderless bacteriocins are similar to those in saposins and saposin-like peptides. MEDCHEMCOMM 2017; 8:276-285. [PMID: 30108744 PMCID: PMC6072434 DOI: 10.1039/c6md00607h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 12/09/2016] [Indexed: 12/14/2022]
Abstract
Bacteriocins are potent antimicrobial peptides that are ribosomally produced and exported by bacteria, presumably to aid elimination of competing microorganisms. Many circular and linear leaderless bacteriocins have a recuring three dimensional structural motif known as a saposin-like fold. Although these bacteriocin sizes and sequences are often quite different, and their mechanisms of action vary, this conserved motif of multiple helices appears critical for activity and may enable peptide-lipid and peptide-receptor interactions in target bacterial cell membranes. Comparisons between electrostatic surfaces and hydrophobic surface maps of different bacteriocins are discussed emphasizing similarities and differences in the context of proposed modes of action.
Collapse
Affiliation(s)
- K M Towle
- Department of Chemistry , University of Alberta , Edmonton , Alberta , T6G 2G2 Canada .
| | - J C Vederas
- Department of Chemistry , University of Alberta , Edmonton , Alberta , T6G 2G2 Canada .
| |
Collapse
|
9
|
Bacteriocins of lactic acid bacteria: extending the family. Appl Microbiol Biotechnol 2016; 100:2939-51. [PMID: 26860942 PMCID: PMC4786598 DOI: 10.1007/s00253-016-7343-9] [Citation(s) in RCA: 401] [Impact Index Per Article: 50.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 01/18/2016] [Accepted: 01/22/2016] [Indexed: 12/24/2022]
Abstract
Lactic acid bacteria (LAB) constitute a heterogeneous group of microorganisms that produce lactic acid as the major product during the fermentation process. LAB are Gram-positive bacteria with great biotechnological potential in the food industry. They can produce bacteriocins, which are proteinaceous antimicrobial molecules with a diverse genetic origin, posttranslationally modified or not, that can help the producer organism to outcompete other bacterial species. In this review, we focus on the various types of bacteriocins that can be found in LAB and the organization and regulation of the gene clusters responsible for their production and biosynthesis, and consider the food applications of the prototype bacteriocins from LAB. Furthermore, we propose a revised classification of bacteriocins that can accommodate the increasing number of classes reported over the last years.
Collapse
|
10
|
Arbulu S, Lohans CT, van Belkum MJ, Cintas LM, Herranz C, Vederas JC, Hernández PE. Solution Structure of Enterocin HF, an Antilisterial Bacteriocin Produced by Enterococcus faecium M3K31. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:10689-10695. [PMID: 26585399 DOI: 10.1021/acs.jafc.5b03882] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The solution structure of enterocin HF (EntHF), a class IIa bacteriocin of 43 amino acids produced by Enterococcus faecium M3K31, was evaluated by CD and NMR spectroscopy. Purified EntHF was unstructured in water, but CD analysis supports that EntHF adopts an α-helical conformation when exposed to increasing concentrations of trifluoroethanol. Furthermore, NMR spectroscopy indicates that this bacteriocin adopts an antiparallel β-sheet structure in the N-terminal region (residues 1-17), followed by a well-defined central α-helix (residues 19-30) and a more disordered C-terminal end (residues 31-43). EntHF could be structurally organized into three flexible regions that might act in a coordinated manner. This is in agreement with the absence of long-range nuclear Overhauser effect signals between the β-sheet domain and the C-terminal end of the bacteriocin. The 3D structure recorded for EntHF fits emerging facts regarding target recognition and mode of action of class IIa bacteriocins.
Collapse
Affiliation(s)
- Sara Arbulu
- Departamento de Nutrición, Bromatologı́a y Tecnologı́a de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid (UCM) , Avenida Puerta de Hierro s/n, 28040 Madrid, Spain
| | - Christopher T Lohans
- Department of Chemistry, University of Alberta , Edmonton, Alberta, Canada T6G 2G2
| | - Marco J van Belkum
- Department of Chemistry, University of Alberta , Edmonton, Alberta, Canada T6G 2G2
| | - Luis M Cintas
- Departamento de Nutrición, Bromatologı́a y Tecnologı́a de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid (UCM) , Avenida Puerta de Hierro s/n, 28040 Madrid, Spain
| | - Carmen Herranz
- Departamento de Nutrición, Bromatologı́a y Tecnologı́a de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid (UCM) , Avenida Puerta de Hierro s/n, 28040 Madrid, Spain
| | - John C Vederas
- Department of Chemistry, University of Alberta , Edmonton, Alberta, Canada T6G 2G2
| | - Pablo E Hernández
- Departamento de Nutrición, Bromatologı́a y Tecnologı́a de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid (UCM) , Avenida Puerta de Hierro s/n, 28040 Madrid, Spain
| |
Collapse
|
11
|
Type AII lantibiotic bovicin HJ50 with a rare disulfide bond: structure, structure-activity relationships and mode of action. Biochem J 2014; 461:497-508. [PMID: 24814218 DOI: 10.1042/bj20131524] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Lantibiotics are ribosomally synthesized antimicrobial peptides containing unusual amino acids. As promising alternatives to conventional antibiotics, they have a high potential for alleviating the problem of emergent antibiotic resistance, with possible applications in many industries that have antibacterial demand. Bovicin HJ50 is a type AII lantibiotic, the largest group of lantibiotics, comprising a linear N-terminal region and a globular C-terminal region. Interestingly, bovicin H50 has a disulfide bond that is rare in this group. Owing to limited information about the spatial structures of type AII lantibiotics, the functional regions of this type and the role of the disulfide bond are still unknown. In the present study, we resolved the solution structure of bovicin HJ50 using NMR spectroscopy. This is the first spatial structure of a type AII lantibiotic. Bovicin HJ50 exhibited high flexibility in aqueous solution, whereas varied rigidities were observed in the different rings with the conserved ring A being the most rigid. The charged residues Lys¹¹, Asp¹² and Lys³⁰, as well as the essential disulfide bond were critical for antimicrobial activity. Importantly, bovicin HJ50 showed not only peptidoglycan precursor lipid II-binding ability, but also pore-forming activity, which is significantly different from other bacteriostatic type AII lantibiotics, suggesting a novel antimicrobial mechanism.
Collapse
|
12
|
Towle KM, Chaytor JL, Liu H, Austin P, Roberge M, Roskelley CD, Vederas JC. Synthesis and biological studies of neopetrosiamides as inhibitors of cancer cell invasion. Org Biomol Chem 2013; 11:1476-81. [PMID: 23334605 DOI: 10.1039/c3ob27238a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The tricyclic peptides neopetrosiamides A and B, isolated from the marine sponge Neopetrosia sp., are potential antimetastatic agents that inhibit tumour cell invasion by both amoeboid and mesenchymal migration pathways. They differ in the stereochemistry of the methionine sulfoxide at position 24. Our previously reported syntheses using an orthogonal sulfur protection strategy established the critical connectivity of the three disulfide bonds. In this report, fifteen analogues of neopetrosiamide A and B, six which replace selected disulfide bonds and nine which replace the diastereomeric methionine sulfoxide, have been prepared using Fmoc solid-phase peptide chemistry. Disulfide replacement analogues were shown to lose activity, and only one of the methionine sulfoxide analogues retained full bioactivity in morphological studies.
Collapse
Affiliation(s)
- Kaitlyn M Towle
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada
| | | | | | | | | | | | | |
Collapse
|
13
|
Bodapati KC, Soudy R, Etayash H, Stiles M, Kaur K. Design, synthesis and evaluation of antimicrobial activity of N-terminal modified Leucocin A analogues. Bioorg Med Chem 2013; 21:3715-22. [DOI: 10.1016/j.bmc.2013.04.045] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Revised: 04/05/2013] [Accepted: 04/15/2013] [Indexed: 10/26/2022]
|
14
|
Lohans CT, Towle KM, Miskolzie M, McKay RT, van Belkum MJ, McMullen LM, Vederas JC. Solution structures of the linear leaderless bacteriocins enterocin 7A and 7B resemble carnocyclin A, a circular antimicrobial peptide. Biochemistry 2013; 52:3987-94. [PMID: 23725536 DOI: 10.1021/bi400359z] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Leaderless bacteriocins are a class of ribosomally synthesized antimicrobial peptides that are produced by certain Gram-positive bacteria without an N-terminal leader section. These bacteriocins are of great interest due to their potent inhibition of many Gram-positive organisms, including food-borne pathogens such as Listeria and Clostridium spp. We now report the NMR solution structures of enterocins 7A and 7B, leaderless bacteriocins recently isolated from Enterococcus faecalis 710C. These are the first three-dimensional structures to be reported for bacteriocins of this class. Unlike most other linear Gram-positive bacteriocins, enterocins 7A and 7B are highly structured in aqueous conditions. Both peptides are primarily α-helical, adopting a similar overall fold. The structures can be divided into three separate α-helical regions: the N- and C-termini are both α-helical, separated by a central kinked α-helix. The overall structures bear an unexpected resemblance to carnocyclin A, a 60-residue peptide that is cyclized via an amide bond between the C- and N-termini and has a saposin fold. Because of synergism observed for other two-peptide leaderless bacteriocins, it was of interest to probe possible binding interactions between enterocins 7A and 7B. However, despite synergistic activity observed between these peptides, no significant binding interaction was observed based on NMR and isothermal calorimetry.
Collapse
Affiliation(s)
- Christopher T Lohans
- Department of Chemistry, and §Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | | | | | | | | | | | | |
Collapse
|
15
|
Cui Y, Zhang C, Wang Y, Shi J, Zhang L, Ding Z, Qu X, Cui H. Class IIa bacteriocins: diversity and new developments. Int J Mol Sci 2012; 13:16668-707. [PMID: 23222636 PMCID: PMC3546714 DOI: 10.3390/ijms131216668] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 10/10/2012] [Accepted: 11/12/2012] [Indexed: 12/02/2022] Open
Abstract
Class IIa bacteriocins are heat-stable, unmodified peptides with a conserved amino acids sequence YGNGV on their N-terminal domains, and have received much attention due to their generally recognized as safe (GRAS) status, their high biological activity, and their excellent heat stability. They are promising and attractive agents that could function as biopreservatives in the food industry. This review summarizes the new developments in the area of class IIa bacteriocins and aims to provide uptodate information that can be used in designing future research.
Collapse
Affiliation(s)
- Yanhua Cui
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; E-Mails: (Y.C.); (C.Z.); (Z.D.)
| | - Chao Zhang
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; E-Mails: (Y.C.); (C.Z.); (Z.D.)
| | - Yunfeng Wang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, China; E-Mail:
| | - John Shi
- Guelph Food Research Center, Agriculture and Agri-Food Canada, Guelph, ON N1G5C9, Canada; E-Mail:
| | - Lanwei Zhang
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; E-Mails: (Y.C.); (C.Z.); (Z.D.)
| | - Zhongqing Ding
- School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; E-Mails: (Y.C.); (C.Z.); (Z.D.)
| | - Xiaojun Qu
- Institute of Microbiology, Heilongjiang Academy of Sciences, Harbin 150010, China; E-Mail:
| | - Hongyu Cui
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, China; E-Mail:
| |
Collapse
|