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Huessy B, Bumann D, Ebert D. Ectopical expression of bacterial collagen-like protein supports its role as adhesin in host-parasite coevolution. ROYAL SOCIETY OPEN SCIENCE 2024; 11:231441. [PMID: 38577215 PMCID: PMC10987987 DOI: 10.1098/rsos.231441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 01/10/2024] [Accepted: 02/13/2024] [Indexed: 04/06/2024]
Abstract
For a profound understanding of antagonistic coevolution, it is necessary to identify the coevolving genes. The bacterium Pasteuria and its host, the microcrustacean Daphnia, are a well-characterized paradigm for co-evolution, but the underlying genes remain largely unknown. A genome-wide association study suggested a Pasteuria collagen-like protein 7 (Pcl7) as a candidate mediating parasite attachment and driving its coevolution with the host. Since Pasteuria ramosa cannot currently be genetically manipulated, we used Bacillus thuringiensis to express a fusion protein of a Pcl7 carboxy-terminus from P. ramosa and the amino-terminal domain of a B. thuringiensis collagen-like protein (CLP). Mutant B. thuringiensis (Pcl7-Bt) spores but not wild-type B. thuringiensis (WT-Bt) spores attached to the same site of susceptible hosts as P. ramosa. Furthermore, Pcl7-Bt spores attached readily to susceptible host genotypes, but only slightly to resistant host genotypes. These findings indicated that the fusion protein was properly expressed and folded and demonstrated that indeed the C-terminus of Pcl7 mediates attachment in a host genotype-specific manner. These results provide strong evidence for the involvement of a CLP in the coevolution of Daphnia and P. ramosa and open new avenues for genetic epidemiological studies of host-parasite interactions.
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Affiliation(s)
- Benjamin Huessy
- Department of Environmental Sciences, Zoology, University of Basel, Basel4051, Switzerland
- University of Basel, Basel4056, Switzerland
| | | | - Dieter Ebert
- Department of Environmental Sciences, Zoology, University of Basel, Basel4051, Switzerland
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Kim D, Kwon SJ, Wu X, Sauve J, Lee I, Nam J, Kim J, Dordick JS. Selective Killing of Pathogenic Bacteria by Antimicrobial Silver Nanoparticle-Cell Wall Binding Domain Conjugates. ACS APPLIED MATERIALS & INTERFACES 2018; 10:13317-13324. [PMID: 29619821 DOI: 10.1021/acsami.8b00181] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Broad-spectrum antibiotics indiscriminately kill bacteria, removing nonpathogenic microorganisms and leading to evolution of antibiotic resistant strains. Specific antimicrobials that could selectively kill pathogenic bacteria without targeting other bacteria in the natural microbial community or microbiome may be able to address this concern. In this work, we demonstrate that silver nanoparticles, suitably conjugated to a selective cell wall binding domain (CBD), can efficiently target and selectively kill bacteria. As a relevant example, CBDBA from Bacillus anthracis selectively bound to B. anthracis in a mixture with Bacillus subtilis, as well in a mixture with Staphylococcus aureus. This new biologically-assisted hybrid strategy, therefore, has the potential to provide selective decontamination of pathogenic bacteria with minimal impact on normal microflora.
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Affiliation(s)
- Domyoung Kim
- Department of Chemical and Biological Engineering , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Seok-Joon Kwon
- Department of Chemical and Biological Engineering , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Xia Wu
- Department of Chemical and Biological Engineering , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Jessica Sauve
- Department of Chemical and Biological Engineering , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Inseon Lee
- Department of Chemical and Biological Engineering , Korea University , 145 Anam-ro , Seongbuk-gu , Seoul 02841 , Republic of Korea
| | - Jahyun Nam
- Department of Chemical and Biological Engineering , Korea University , 145 Anam-ro , Seongbuk-gu , Seoul 02841 , Republic of Korea
| | - Jungbae Kim
- Department of Chemical and Biological Engineering , Korea University , 145 Anam-ro , Seongbuk-gu , Seoul 02841 , Republic of Korea
| | - Jonathan S Dordick
- Department of Chemical and Biological Engineering , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
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