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- Title
Bacteriophage Sf6 Tailspike Protein for Detection of Shigella flexneri Pathogens.
- Authors
Kunstmann, Sonja; Scheidt, Tom; Buchwald, Saskia; Helm, Alexandra; Barbirz, Stefanie; Mulard, Laurence A.; Fruth, Angelika
- Abstract
Bacteriophage research is gaining more importance due to increasing antibiotic resistance. However, for treatment with bacteriophages, diagnostics have to be improved. Bacteriophages carry adhesion proteins, which bind to the bacterial cell surface, for example tailspike proteins (TSP) for specific recognition of bacterial O-antigen polysaccharide. TSP are highly stable proteins and thus might be suitable components for the integration into diagnostic tools. We used the TSP of bacteriophage Sf6 to establish two applications for detecting <italic>Shigella flexneri</italic> (<italic>S. flexneri</italic>), a highly contagious pathogen causing dysentery. We found that Sf6TSP not only bound O-antigen of <italic>S. flexneri</italic> serotype Y, but also the glucosylated O-antigen of serotype 2a. Moreover, mass spectrometry glycan analyses showed that Sf6TSP tolerated various O-acetyl modifications on these O-antigens. We established a microtiter plate-based ELISA like tailspike adsorption assay (ELITA) using a Strep-tag®II modified Sf6TSP. As sensitive screening alternative we produced a fluorescently labeled Sf6TSP via coupling to an environment sensitive dye. Binding of this probe to the <italic>S. flexneri</italic> O-antigen Y elicited a fluorescence intensity increase of 80% with an emission maximum in the visible light range. The Sf6TSP probes thus offer a promising route to a highly specific and sensitive bacteriophage TSP-based <italic>Shigella</italic> detection system.
- Subjects
BACTERIOPHAGES; SHIGELLA flexneri; PATHOGENIC microorganisms; PROTEINS; POLYSACCHARIDES
- Publication
Viruses (1999-4915), 2018, Vol 10, Issue 8, p431
- ISSN
1999-4915
- Publication type
Article
- DOI
10.3390/v10080431