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Leisch N, Pende N, Weber PM, Gruber-Vodicka HR, Verheul J, Vischer NOE, Abby SS, Geier B, den Blaauwen T, Bulgheresi S. Asynchronous division by non-ring FtsZ in the gammaproteobacterial symbiont of Robbea hypermnestra. Nat Microbiol 2016; 2:16182. [PMID: 27723729 DOI: 10.1038/nmicrobiol.2016.182] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 08/26/2016] [Indexed: 11/10/2022]
Abstract
The reproduction mode of uncultivable microorganisms deserves investigation as it can largely diverge from conventional transverse binary fission. Here, we show that the rod-shaped gammaproteobacterium thriving on the surface of the Robbea hypermnestra nematode divides by FtsZ-based, non-synchronous invagination of its poles-that is, the host-attached and fimbriae-rich pole invaginates earlier than the distal one. We conclude that, in a naturally occurring animal symbiont, binary fission is host-oriented and does not require native FtsZ to polymerize into a ring at any septation stage.
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Affiliation(s)
- Nikolaus Leisch
- Department of Ecogenomics and Systems Biology, Archaeal Biology and Ecogenomics Division, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria.,Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, D-28359 Bremen, Germany
| | - Nika Pende
- Department of Ecogenomics and Systems Biology, Archaeal Biology and Ecogenomics Division, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | - Philipp M Weber
- Department of Ecogenomics and Systems Biology, Archaeal Biology and Ecogenomics Division, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | | | - Jolanda Verheul
- Bacterial Cell Biology, Swammerdam Institute of Life Sciences, Faculty of Science, University of Amsterdam, Boelelaan 1108, 1081 HZ Amsterdam, Netherlands
| | - Norbert O E Vischer
- Bacterial Cell Biology, Swammerdam Institute of Life Sciences, Faculty of Science, University of Amsterdam, Boelelaan 1108, 1081 HZ Amsterdam, Netherlands
| | - Sophie S Abby
- Department of Ecogenomics and Systems Biology, Archaeal Biology and Ecogenomics Division, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | - Benedikt Geier
- Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, D-28359 Bremen, Germany
| | - Tanneke den Blaauwen
- Bacterial Cell Biology, Swammerdam Institute of Life Sciences, Faculty of Science, University of Amsterdam, Boelelaan 1108, 1081 HZ Amsterdam, Netherlands
| | - Silvia Bulgheresi
- Department of Ecogenomics and Systems Biology, Archaeal Biology and Ecogenomics Division, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
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Henry KA, Arbabi-Ghahroudi M, Scott JK. Beyond phage display: non-traditional applications of the filamentous bacteriophage as a vaccine carrier, therapeutic biologic, and bioconjugation scaffold. Front Microbiol 2015; 6:755. [PMID: 26300850 PMCID: PMC4523942 DOI: 10.3389/fmicb.2015.00755] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 07/10/2015] [Indexed: 12/23/2022] Open
Abstract
For the past 25 years, phage display technology has been an invaluable tool for studies of protein-protein interactions. However, the inherent biological, biochemical, and biophysical properties of filamentous bacteriophage, as well as the ease of its genetic manipulation, also make it an attractive platform outside the traditional phage display canon. This review will focus on the unique properties of the filamentous bacteriophage and highlight its diverse applications in current research. Particular emphases are placed on: (i) the advantages of the phage as a vaccine carrier, including its high immunogenicity, relative antigenic simplicity and ability to activate a range of immune responses, (ii) the phage's potential as a prophylactic and therapeutic agent for infectious and chronic diseases, (iii) the regularity of the virion major coat protein lattice, which enables a variety of bioconjugation and surface chemistry applications, particularly in nanomaterials, and (iv) the phage's large population sizes and fast generation times, which make it an excellent model system for directed protein evolution. Despite their ubiquity in the biosphere, metagenomics work is just beginning to explore the ecology of filamentous and non-filamentous phage, and their role in the evolution of bacterial populations. Thus, the filamentous phage represents a robust, inexpensive, and versatile microorganism whose bioengineering applications continue to expand in new directions, although its limitations in some spheres impose obstacles to its widespread adoption and use.
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Affiliation(s)
- Kevin A. Henry
- Human Health Therapeutics Portfolio, National Research Council Canada, OttawaON, Canada
| | - Mehdi Arbabi-Ghahroudi
- Human Health Therapeutics Portfolio, National Research Council Canada, OttawaON, Canada
- School of Environmental Sciences, University of Guelph, GuelphON, Canada
- Department of Biology, Carleton University, OttawaON, Canada
| | - Jamie K. Scott
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BCCanada
- Faculty of Health Sciences, Simon Fraser University, BurnabyBC, Canada
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Virulence genotyping of Escherichia coli isolates from avian cellulitis in relation to phylogeny. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/s00580-009-0837-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Van Gerven N, Sleutel M, Deboeck F, De Greve H, Hernalsteens JP. Surface display of the receptor-binding domain of the F17a-G fimbrial adhesin through the autotransporter AIDA-I leads to permeability of bacterial cells. MICROBIOLOGY-SGM 2009; 155:468-476. [PMID: 19202095 DOI: 10.1099/mic.0.022327-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Surface exposure of antigens on bacterial cells can be critical for eliciting an effective antibody response. Therefore, we investigated the cellular localization of the fimbrial F17a-G receptor-binding domain, fused to the translocator domain of the AIDA-I autotransporter. Synthesis of the fusion protein, under the control of the L-arabinose-inducible PBAD promoter, was shown to permeabilize Escherichia coli K-12 and Salmonella enterica serovar Typhimurium cells. The presence of permeable cells interfered with several methods that are typically used to determine surface exposure of proteins, such as protease treatment and whole-cell ELISA. Double immunofluorescence microscopy, using a second antibody directed against beta-galactosidase, a bacterial protein expressed in the cytoplasm, allowed the simultaneous detection of antigen expression and permeability in individual cells.
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Affiliation(s)
- Nani Van Gerven
- Onderzoeksgroep Genetische Virologie, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Mike Sleutel
- Structural Biology Brussels, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Francine Deboeck
- Onderzoeksgroep Genetische Virologie, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Henri De Greve
- Structural Biology Brussels, Department of Molecular and Cellular Interactions, VIB, B-1050 Brussels, Belgium.,Structural Biology Brussels, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Jean-Pierre Hernalsteens
- Onderzoeksgroep Genetische Virologie, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
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Ghanbarpour R, Oswald E. Characteristics and virulence genes of Escherichia coli isolated from septicemic calves in southeast of Iran. Trop Anim Health Prod 2008; 41:1091-9. [PMID: 19067217 DOI: 10.1007/s11250-008-9289-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2007] [Accepted: 11/28/2008] [Indexed: 11/25/2022]
Abstract
Virulence factors are associated with the capacity of E. coli strains to cause intestinal and extraintestinal infections. Thirty one E. coli isolates were obtained from heart blood or internal organs of septicemic calves. The O serogroups of isolates were determined. PCR assays were performed to determine the phylogenetic groups and presence of specific virulence genes. Fourteen (45.16%) isolates belonged to seven O serogroups (O8, O15, O20, O45, O78, O101 and O103) and 17 (54.83%) isolates were O-nontypeable. E. coli isolates fall into three phylogenetic groups included 15 isolates belonged to B1, 9 to A and 7 to D phylogenetic groups. Nineteen (61.29%) isolates exhibited at least one of the virulence genes. F17 family (5 isolates f17b, 3 isolates f17c, 1 isolate f17a) genes and aerobactin encoding gene of iucD (5 isolates) were the two most prevalent virulence genes. Three isolates were positive for cnf2 and cdtIII genes in combination and they were O-nontypeable. AfaE-VIII, CS31A gene (clpG) and hemolysin encoding gene (hly) were detected in 3, 4 and 3 isolates respectively. None of the isolates contained the ipaH sequences and the genes encoding fimbria (F5, F41, S, P), AfaI adesin, toxins (LT-I, ST-I, SLT-I, SLT-II, CNF1 and CDT-IV) and intimin.
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Affiliation(s)
- Reza Ghanbarpour
- Department of Microbiology, Faculty of Veterinary Medicine, Shahid Bahonar University, P.O. Box 76169-14111, Kerman, Iran.
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Van Gerven N, De Greve H, Hernalsteens JP. Inactivated Salmonella expressing the receptor-binding domain of bacterial adhesins elicit antibodies inhibiting hemagglutination. Vet Microbiol 2008; 131:369-75. [PMID: 18502056 DOI: 10.1016/j.vetmic.2008.04.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2007] [Revised: 03/25/2008] [Accepted: 04/10/2008] [Indexed: 11/28/2022]
Abstract
We examined the potential of inactivated Salmonella strains to induce protective antibodies against two adhesins of pathogenic Escherichia coli. The receptor-binding domains of the F17a-G adhesin of F17a fimbriae and of the FimH adhesin of type 1 fimbriae were fused to the translocator domain of the autotransporter AIDA-I. An IgG response against F17a-G or FimH was induced after immunization of mice with acetone-inactivated Salmonella displaying the corresponding fimbrial receptor-binding domain. These sera inhibit in vitro agglutination of erythrocytes by E. coli carrying these fimbriae. Our results demonstrate that induced and subsequently acetone-inactivated Salmonella are useful delivery vehicles for the stimulation of an IgG antibody response against heterologous antigens.
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Affiliation(s)
- Nani Van Gerven
- Onderzoeksgroep Genetische Virologie, Vrije Universiteit Brussel, B-1050 Brussels, Belgium.
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