Kintz, Erica, Davies, Mark, Hammarlöf, Disa L et al. (3 more authors) (2015) A BTP1 prophage gene present in invasive non-typhoidal Salmonella determines composition and length of the O-antigen of the lipopolysaccharide. Molecular Microbiology. pp. 263-275. ISSN 0950-382X
Abstract
Salmonella Typhimurium isolate D23580 represents a recently identified ST313 lineage of invasive non-Typhoidal Salmonellae (iNTS). One of the differences between this lineage and other non-iNTS S. Typhimurium isolates is the presence of prophage BTP1. This prophage encodes a gtrC gene, implicated in O-antigen modification. GtrC(BTP1) is essential for maintaining O-antigen length in isolate D23580, since a gtr(BTP1) mutant yields a short O-antigen. This phenotype can be complemented by gtrC(BTP1) or very closely related gtrC genes. The short O-antigen of the gtr(BTP1) mutant was also compensated by deletion of the BTP1 phage tailspike gene in the D23580 chromosome. This tailspike protein has a putative endorhamnosidase domain and thus may mediate O-antigen cleavage. Expression of the gtrC(BTP1) gene is, in contrast to expression of many other gtr operons, not subject to phase variation and transcriptional analysis suggests that gtrC is produced under a variety of conditions. Additionally, GtrC(BTP1) expression is necessary and sufficient to provide protection against BTP1 phage infection of an otherwise susceptible strain. These data are consistent with a model in which GtrC(BTP1) mediates modification of the BTP1 phage O-antigen receptor in lysogenic D23580, and thereby prevents superinfection by itself and other phage that use the same O-antigen co-receptor.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015 The Authors. Molecular Microbiology published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Hull York Medical School (York) The University of York > Faculty of Sciences (York) > Centre for Immunology and Infection (CII) (York) |
Funding Information: | Funder Grant number WELLCOME TRUST 094333/Z/10/Z WELLCOME TRUST 080086/Z/06/Z |
Depositing User: | Pure (York) |
Date Deposited: | 05 Jun 2015 15:38 |
Last Modified: | 22 Nov 2024 00:27 |
Published Version: | https://doi.org/10.1111/mmi.12933 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1111/mmi.12933 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:86820 |
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