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Published in: Gut Pathogens 1/2014

Open Access 01-12-2014 | Research

Analysis of the role of the Cronobacter sakazakii ProP homologues in osmotolerance

Authors: Audrey Feeney, Christopher D Johnston, Rodney Govender, Jim O’Mahony, Aidan Coffey, Roy D Sleator

Published in: Gut Pathogens | Issue 1/2014

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Abstract

Bacteria respond to elevated osmolality by the accumulation of a range of low molecular weight molecules, known as compatible solutes (owing to their compatibility with the cells' normal physiology at high internal concentrations). The neonatal pathogen Cronobacter sakazakii is uniquely osmotolerant, surviving in powdered infant formula (PIF) which typically has a water activity (aw) of 0.2 – inhospitable to most micro-organisms. Mortality rates of up to 80% in infected infants have been recorded making C. sakazakii a serious cause for concern. In silico analysis of the C. sakazakii BAA-894 genome revealed seven copies of the osmolyte uptake system ProP. Herein, we test the physiological role of each of these homologues following heterologous expression against an osmosensitive Escherichia coli host.
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Metadata
Title
Analysis of the role of the Cronobacter sakazakii ProP homologues in osmotolerance
Authors
Audrey Feeney
Christopher D Johnston
Rodney Govender
Jim O’Mahony
Aidan Coffey
Roy D Sleator
Publication date
01-12-2014
Publisher
BioMed Central
Published in
Gut Pathogens / Issue 1/2014
Electronic ISSN: 1757-4749
DOI
https://doi.org/10.1186/1757-4749-6-15

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