Connolly, J. P. R., Gabrielsen, M. , Goldstone, R. J., Grinter, R., Wang, D., Cogdell, R. J. , Walker, D. , Smith, D. G. E. and Roe, A. J. (2016) A highly conserved bacterial d-serine uptake system links host metabolism and virulence. PLoS Pathogens, 12(1), e1005359. (doi: 10.1371/journal.ppat.1005359) (PMID:26727373) (PMCID:PMC4699771)
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Abstract
The ability of any organism to sense and respond to challenges presented in the environment is critically important for promoting or restricting colonization of specific sites. Recent work has demonstrated that the host metabolite D-serine has the ability to markedly influence the outcome of infection by repressing the type III secretion system of enterohaemorrhagic Escherichia coli (EHEC) in a concentration-dependent manner. However, exactly how EHEC monitors environmental D-serine is not understood. In this work, we have identified two highly conserved members of the E. coli core genome, encoding an inner membrane transporter and a transcriptional regulator, which collectively help to “sense” levels of D-serine by regulating its uptake from the environment and in turn influencing global gene expression. Both proteins are required for full expression of the type III secretion system and diversely regulated prophage-encoded effector proteins demonstrating an important infection-relevant adaptation of the core genome. We propose that this system acts as a key safety net, sampling the environment for this metabolite, thereby promoting colonization of EHEC to favorable sites within the host.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Roe, Professor Andrew and Walker, Professor Daniel and Wang, Mr Dai and Cogdell, Professor Richard and Connolly, Dr James and Grinter, Mr Rhys and Goldstone, Mr Robert and Smith, Professor David and Gabrielsen, Dr Mads |
| Authors: | Connolly, J. P. R., Gabrielsen, M., Goldstone, R. J., Grinter, R., Wang, D., Cogdell, R. J., Walker, D., Smith, D. G. E., and Roe, A. J. |
| College/School: | College of Medical Veterinary and Life Sciences > School of Infection & Immunity College of Medical Veterinary and Life Sciences > School of Molecular Biosciences |
| Journal Name: | PLoS Pathogens |
| Publisher: | Public Library of Science |
| ISSN: | 1553-7366 |
| ISSN (Online): | 1553-7374 |
| Copyright Holders: | Copyright © 2016 Connolly et al. |
| First Published: | First published in PLoS Pathogens 12(1):e1005359 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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