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Zelikman S, Dudkevich R, Korenfeld-Tzemach H, Shmidov E, Levi-Ferber M, Shoshani S, Ben-Aroya S, Henis-Korenblit S, Banin E. PemB, a type III secretion effector in Pseudomonas aeruginosa, affects Caenorhabditis elegans life span. Heliyon 2024; 10:e29751. [PMID: 38681583 PMCID: PMC11053225 DOI: 10.1016/j.heliyon.2024.e29751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 04/08/2024] [Accepted: 04/15/2024] [Indexed: 05/01/2024] Open
Abstract
Pseudomonas aeruginosa is one of the leading nosocomial opportunistic pathogens causing acute and chronic infections. Among its main virulent factors is the Type III secretion system (T3SS) which enhances disease severity by delivering effectors to the host in a highly regulated manner. Despite its importance for virulence, only six T3SS-dependent effectors have been discovered so far. Previously, we identified two new potential effectors using a machine-learning algorithm approach. Here we demonstrate that one of these effectors, PemB, is indeed virulent. Using a live Caenorhabditis elegans infection model, we demonstrate this effector damages the integrity of the intestine barrier leading to the death of the host. Implementing a high-throughput assay using Saccharomyces cerevisiae, we identified several candidate proteins that interact with PemB. One of them, EFT1, has an ortholog in C. elegans (eef-2) and is also an essential gene and a well-known target utilized by different pathogens to induce toxicity to the worm. Accordingly, we found that by silencing the eef-2 gene in C. elegans, PemB could no longer induce its toxic effect. The current study further uncovers the complex machinery assisting P. aeruginosa virulence and may provide novel insight how to manage infection associated with this hard-to-treat pathogen.
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Affiliation(s)
- Shira Zelikman
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
- The Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
| | - Reut Dudkevich
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
| | - Hadar Korenfeld-Tzemach
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
- The Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
| | - Esther Shmidov
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
- The Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
| | - Mor Levi-Ferber
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
| | - Sivan Shoshani
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
- The Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
| | - Shay Ben-Aroya
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
- The Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
| | - Sivan Henis-Korenblit
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
| | - Ehud Banin
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
- The Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Max and Anna Webb, 5290002, Ramat Gan, Israel
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2
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Perelshtein I, Shoshani S, Jacobi G, Natan M, Dudchenko N, Perkas N, Tkachev M, Bengalli R, Fiandra L, Mantecca P, Ivanova K, Tzanov T, Banin E, Gedanken A. Protecting the Antibacterial Coating of Urinal Catheters for Improving Safety. ACS Appl Bio Mater 2024; 7:990-998. [PMID: 38226433 DOI: 10.1021/acsabm.3c00988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
Catheter-associated urinary tract infections (CAUTI) are among the most common bacterial infections associated with prolonged hospitalization and increased healthcare expenditures. Despite recent advances in the prevention and treatment of these infections, there are still many challenges remaining, among them the creation of a durable catheter coating, which prevents bacterial biofilm formation. The current work reports on a method of protecting medical tubing endowed with antibiofilm properties. Silicone catheters coated sonochemically with ZnO nanoparticles (NPs) demonstrated excellent antibiofilm effects. Toward approval by the European Medicines Agency, it was realized that the ZnO coating would not withstand the regulatory requirements of avoiding dissolution for 14 days in artificial urine examination. Namely, after exposure to urine for 14 days, the coating amount was reduced by 90%. Additional coatings with either carbon or silica maintained antibiofilm activity against Staphylococcus aureus while resisting dissolution in artificial urine for 14 days (C- or SiO2-protected catheters exhibited only 29% reduction). HR-SEM images of the protected catheters indicate the presence of the ZnO coating as well as the protective layer. Antibiofilm activity of all catheters was evaluated both before and after exposure to artificial urine. It was shown that before artificial urine exposure, all coated catheters showed high antibiofilm properties compared to the uncoated control. Exposure of ZnO-coated catheters, without the protective layer, to artificial urine had a significant effect exhibited by the decrease in antibiofilm activity by almost 2 orders of magnitude, compared to unexposed catheters. Toxicity studies performed using a reconstructed human epidermis demonstrated the safety of the improved coating. Exposure of the epidermis to ZnO catheter extracts in artificial urine affects tissue viability compared with control samples, which was not observed in the case of ZnO NPs coating with SiO2 or C. We suggest that silica and carbon coatings confer some protection against zinc ions release, improving ZnO coating safety.
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Affiliation(s)
- Ilana Perelshtein
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel
- Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Sivan Shoshani
- The Mina and Everard Goodman Faculty of Life Sciences, Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Gila Jacobi
- The Mina and Everard Goodman Faculty of Life Sciences, Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Michal Natan
- The Mina and Everard Goodman Faculty of Life Sciences, Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Nataliia Dudchenko
- Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Nina Perkas
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel
- Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Maria Tkachev
- Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Rossella Bengalli
- Department of Earth and Environmental Sciences, Research Center POLARIS, University of Milano Bicocca, Milan 20126, Italy
| | - Luisa Fiandra
- Department of Earth and Environmental Sciences, Research Center POLARIS, University of Milano Bicocca, Milan 20126, Italy
| | - Paride Mantecca
- Department of Earth and Environmental Sciences, Research Center POLARIS, University of Milano Bicocca, Milan 20126, Italy
| | - Kristina Ivanova
- Grup de Biotecnologia Molecular i Industrial, Department of Chemical Engineering, Universitat Politècnica de Catalunya, Rambla Sant Nebridi 22, 08222 Terrasa, Spain
| | - Tzanko Tzanov
- Grup de Biotecnologia Molecular i Industrial, Department of Chemical Engineering, Universitat Politècnica de Catalunya, Rambla Sant Nebridi 22, 08222 Terrasa, Spain
| | - Ehud Banin
- The Mina and Everard Goodman Faculty of Life Sciences, Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Aharon Gedanken
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel
- Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
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3
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Naor T, Gigi S, Waiskopf N, Jacobi G, Shoshani S, Kam D, Magdassi S, Banin E, Banin U. ZnO Quantum Photoinitiators as an All-in-One Solution for Multifunctional Photopolymer Nanocomposites. ACS Nano 2023; 17:20366-20375. [PMID: 37787507 PMCID: PMC10604079 DOI: 10.1021/acsnano.3c06518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 09/28/2023] [Indexed: 10/04/2023]
Abstract
Nanocomposites are constructed from a matrix material combined with dispersed nanosized filler particles. Such a combination yields a powerful ability to tailor the desired mechanical, optical, electrical, thermodynamic, and antimicrobial material properties. Colloidal semiconductor nanocrystals (SCNCs) are exciting potential fillers, as they display size-, shape-, and composition-controlled properties and are easily embedded in diverse matrices. Here we present their role as quantum photoinitiators (QPIs) in acrylate-based polymer, where they act as a catalytic radical initiator and endow the system with mechanical, photocatalytic, and antimicrobial properties. By utilizing ZnO nanorods (NRs) as QPIs, we were able to increase the tensile strength and elongation at break of poly(ethylene glycol) diacrylate (PEGDA) hydrogels by up to 85%, unlike the use of the same ZnO NRs acting merely as fillers. Simultaneously, we endowed the PEGDA hydrogels with post-polymerization photocatalytic and antimicrobial activities and showed their ability to decompose methylene blue and significantly eradicate antibiotic-resistant bacteria and viral pathogens. Moreover, we demonstrate two fabrication showcase methods, traditional molding and digital light processing printing, that can yield hydrogels with complex architectures. These results position SCNC-based systems as promising candidates to act as all-in-one photoinitiators and fillers in nanocomposites for diverse biomedical applications, where specific and purpose-oriented characteristics are required.
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Affiliation(s)
- Tom Naor
- The
Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Shira Gigi
- The
Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Nir Waiskopf
- The
Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Gila Jacobi
- The
Mina and Everard Goodman Faculty of Life Sciences and Advanced Materials
and Nanotechnology Institute, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Sivan Shoshani
- The
Mina and Everard Goodman Faculty of Life Sciences and Advanced Materials
and Nanotechnology Institute, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Doron Kam
- Casali
Center for Applied Chemistry, Institute of Chemistry, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel
| | - Shlomo Magdassi
- Casali
Center for Applied Chemistry, Institute of Chemistry, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel
| | - Ehud Banin
- The
Mina and Everard Goodman Faculty of Life Sciences and Advanced Materials
and Nanotechnology Institute, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Uri Banin
- The
Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
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Nissim M, lline-Vul T, Shoshani S, Jacobi G, Malka E, Dombrovsky A, Banin E, Margel S. Synthesis and Characterization of Durable Antibiofilm and Antiviral Silane-Phosphonium Thin Coatings for Medical and Agricultural Applications. ACS Omega 2023; 8:39354-39365. [PMID: 37901561 PMCID: PMC10601082 DOI: 10.1021/acsomega.3c04908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 09/22/2023] [Indexed: 10/31/2023]
Abstract
Pathogens such as bacteria and viruses cause disease in a range of hosts, from humans to plants. Bacterial biofilms, communities of bacteria, e.g., Staphylococcus aureusand Escherichia coli, attached to the surface, create a protective layer that enhances their survival in harsh environments and resistance to antibiotics and the host's immune system. Biofilms are commonly associated with food spoilage and chronic infections, posing challenges for treatment and prevention. Tomato brown rugose fruit virus (ToBRFV), a newly discovered tobamovirus, infects tomato plants, causing unique symptoms on the fruit, posing a risk for tomato production. The present study focuses on the effectiveness of silane-phosphonium thin coatings on polymeric films, e.g., polypropylene. Phosphonium has significant antibacterial activity and is less susceptible to antibacterial resistance, making it a safer alternative with a reduced environmental impact. We successfully synthesized silane-phosphonium monomers as confirmed by 31P NMR and mass spectrometry. The chemical composition, thickness, morphology, and wetting properties of the coatings were tested by Fourier-transform infrared spectroscopy with attenuated total reflectance, focused ion beam, atomic force microscopy, environmental scanning electron microscope, and contact angle (CA) measurements. The antibiofilm and antibacterial activities of the coatings were tested against S. aureus and E. coli, while the antiviral activity was evaluated against ToBRFV. The significant antibiofilm and antiviral activity suggests applications in various fields including medicine, agriculture, and the food industry.
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Affiliation(s)
- Matan Nissim
- The
Institute of Nanotechnology and Advanced Materials, Department of
Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Taly lline-Vul
- The
Institute of Nanotechnology and Advanced Materials, Department of
Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Sivan Shoshani
- The
Institute of Nanotechnology and Advanced Materials, Faculty of life
science, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Gila Jacobi
- The
Institute of Nanotechnology and Advanced Materials, Faculty of life
science, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Eyal Malka
- The
Institute of Nanotechnology and Advanced Materials, Department of
Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Aviv Dombrovsky
- Plant
Pathology Department, Agricultural Research
Organization-Volcani Institute, Rishon LeZion 7505101, Israel
| | - Ehud Banin
- The
Institute of Nanotechnology and Advanced Materials, Faculty of life
science, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Shlomo Margel
- The
Institute of Nanotechnology and Advanced Materials, Department of
Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel
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Shmidov E, Lebenthal-Loinger I, Roth S, Karako-Lampert S, Zander I, Shoshani S, Danielli A, Banin E. PrrT/A, a Pseudomonas aeruginosa Bacterial Encoded Toxin-Antitoxin System Involved in Prophage Regulation and Biofilm Formation. Microbiol Spectr 2022; 10:e0118222. [PMID: 35575497 PMCID: PMC9241795 DOI: 10.1128/spectrum.01182-22] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 04/19/2022] [Indexed: 01/28/2023] Open
Abstract
Toxin-antitoxin (TA) systems are genetic modules that consist of a stable protein-toxin and an unstable antitoxin that neutralizes the toxic effect. In type II TA systems, the antitoxin is a protein that inhibits the toxin by direct binding. Type II TA systems, whose roles and functions are under intensive study, are highly distributed among bacterial chromosomes. Here, we identified and characterized a novel type II TA system PrrT/A encoded in the chromosome of the clinical isolate 39016 of the opportunistic pathogen Pseudomonas aeruginosa. We have shown that the PrrT/A system exhibits classical type II TA characteristics and novel regulatory properties. Following deletion of the prrA antitoxin, we discovered that the system is involved in a range of processes including (i) biofilm and motility, (ii) reduced prophage induction and bacteriophage production, and (iii) increased fitness for aminoglycosides. Taken together, these results highlight the importance of this toxin-antitoxin system to key physiological traits in P. aeruginosa. IMPORTANCE The functions attributed to bacterial TA systems are controversial and remain largely unknown. Our study suggests new insights into the potential functions of bacterial TA systems. We reveal that a chromosome-encoded TA system can regulate biofilm and motility, antibiotic resistance, prophage gene expression, and phage production. The latter presents a thus far unreported function of bacterial TA systems. In addition, with the emergence of antimicrobial-resistant bacteria, especially with the rising of P. aeruginosa resistant strains, the investigation of TA systems is critical as it may account for potential new targets against the resistant strains.
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Affiliation(s)
- Esther Shmidov
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
- The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
| | - Ilana Lebenthal-Loinger
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Shira Roth
- The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
- Faculty of Engineering, Bar-Ilan University, Ramat Gan, Israel
| | - Sarit Karako-Lampert
- Scientific Equipment Center, The Mina & Everard Goodman Faculty of Life Sciences Bar-Ilan University, Ramat Gan, Israel
| | - Itzhak Zander
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
- The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
| | - Sivan Shoshani
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
- The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
| | - Amos Danielli
- The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
- Faculty of Engineering, Bar-Ilan University, Ramat Gan, Israel
| | - Ehud Banin
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
- The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
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Shmidov E, Zander I, Lebenthal-Loinger I, Karako-Lampert S, Shoshani S, Banin E. An Efficient, Counter-Selection-Based Method for Prophage Curing in Pseudomonas aeruginosa Strains. Viruses 2021; 13:v13020336. [PMID: 33670076 PMCID: PMC7926659 DOI: 10.3390/v13020336] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/11/2021] [Accepted: 02/18/2021] [Indexed: 01/28/2023] Open
Abstract
Prophages are bacteriophages in the lysogenic state, where the viral genome is inserted within the bacterial chromosome. They contribute to strain genetic variability and can influence bacterial phenotypes. Prophages are highly abundant among the strains of the opportunistic pathogen Pseudomonas aeruginosa and were shown to confer specific traits that can promote strain pathogenicity. The main difficulty of studying those regions is the lack of a simple prophage-curing method for P. aeruginosa strains. In this study, we developed a novel, targeted-curing approach for prophages in P. aeruginosa. In the first step, we tagged the prophage for curing with an ampicillin resistance cassette (ampR) and further used this strain for the sacB counter-selection marker’s temporal insertion into the prophage region. The sucrose counter-selection resulted in different variants when the prophage-cured mutant is the sole variant that lost the ampR cassette. Next, we validated the targeted-curing with local PCR amplification and Whole Genome Sequencing. The application of the strategy resulted in high efficiency both for curing the Pf4 prophage of the laboratory wild-type (WT) strain PAO1 and for PR2 prophage from the clinical, hard to genetically manipulate, 39016 strain. We believe this method can support the research and growing interest in prophage biology in P. aeruginosa as well as additional Gram-negative bacteria.
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Affiliation(s)
- Esther Shmidov
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel; (E.S.); (I.Z.); (I.L.-L.); (S.S.)
- The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Itzhak Zander
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel; (E.S.); (I.Z.); (I.L.-L.); (S.S.)
- The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Ilana Lebenthal-Loinger
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel; (E.S.); (I.Z.); (I.L.-L.); (S.S.)
| | - Sarit Karako-Lampert
- Scientific Equipment Center, The Mina & Everard Goodman Faculty of Life Sciences Bar-Ilan University, Ramat Gan 5290002, Israel;
| | - Sivan Shoshani
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel; (E.S.); (I.Z.); (I.L.-L.); (S.S.)
- The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Ehud Banin
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel; (E.S.); (I.Z.); (I.L.-L.); (S.S.)
- The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
- Correspondence:
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Zander I, Shmidov E, Roth S, Ben-David Y, Shoval I, Shoshani S, Danielli A, Banin E. Characterization of PfiT/PfiA toxin-antitoxin system of Pseudomonas aeruginosa that affects cell elongation and prophage induction. Environ Microbiol 2020; 22:5048-5057. [PMID: 32458560 DOI: 10.1111/1462-2920.15102] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 05/24/2020] [Indexed: 01/22/2023]
Abstract
Toxin-antitoxin (TA) systems are small genetic modules usually consisting of two elements-a toxin and an antitoxin. The abundance of TA systems among various bacterial strains may indicate an important evolutionary role. Pseudomonas aeruginosa, which can be found in a variety of niches in nature, is an opportunistic pathogen for various hosts. While P. aeruginosa strains are very versatile and diverse, only a few TA systems were characterized in this species. Here, we describe a newly characterized TA system in P. aeruginosa that is encoded within the filamentous Pf4 prophage. This system, named PfiT/PfiA, is a homologue of the ParE/YefM TA system. It is a type II TA system, in which the antitoxin is a protein that binds the toxic protein and eliminates the toxic effect. PfiT/PfiA carries several typical type II characteristics. Specifically, it constitutes two small genes expressed in a single operon, PfiT inhibits growth and PfiA eliminates this effect, PfiA binds PfiT, and PfiT expression results in elongated cells. Finally, we assigned a novel function to this TA system, where an imbalance between PfiT and PfiA, favouring the toxin, resulted in cell elongation and an increase in virion production.
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Affiliation(s)
- Itzhak Zander
- The Mina and Everard Goodman Faculty of Life Sciences and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
| | - Ester Shmidov
- The Mina and Everard Goodman Faculty of Life Sciences and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
| | - Shira Roth
- Faculty of Engineering and The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
| | - Yossi Ben-David
- The Mina and Everard Goodman Faculty of Life Sciences and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
| | - Irit Shoval
- Scientific Equipment Center, The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel
| | - Sivan Shoshani
- The Mina and Everard Goodman Faculty of Life Sciences and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
| | - Amos Danielli
- Faculty of Engineering and The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
| | - Ehud Banin
- The Mina and Everard Goodman Faculty of Life Sciences and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel
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8
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Foran E, Buravenkov V, Kopel M, Mizrahi N, Shoshani S, Helbert W, Banin E. Functional characterization of a novel “ulvan utilization loci” found in Alteromonas sp. LOR genome. ALGAL RES 2017. [DOI: 10.1016/j.algal.2017.04.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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10
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Shoshani S, Piran R, Arava Y, Keinan E. A Molecular Cryptosystem for Images by DNA Computing. Angew Chem Int Ed Engl 2012; 51:2883-7. [DOI: 10.1002/anie.201107156] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Revised: 01/09/2012] [Indexed: 01/22/2023]
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13
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Shoshani S, Wolf S, Keinan E. Molecular computing with plant cell phenotype serving as quality controlled output. Mol BioSyst 2011; 7:1113-20. [DOI: 10.1039/c0mb00226g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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