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Cyclopropane fatty acids improve Escherichia coli survival in acidified minimal media by reducing membrane permeability to H+ and enhanced ability to extrude H+
Citation
Shabala, Lana and Ross, T, Cyclopropane fatty acids improve Escherichia coli survival in acidified minimal media by reducing membrane permeability to H+ and enhanced ability to extrude H+, Research in Microbiology, 159, (6) pp. 458-461. ISSN 0923-2508 (2008) [Refereed Article]
DOI: doi:10.1016/j.resmic.2008.04.011
Abstract
The physiological role of cyclopropane fatty acids (CFAs) in acid stress resistance was studied by in situ microelectrode H+ flux measurements of Escherichia coli Frag1 and its isogenic CFA-deficient mutant JBM 1. After exposure to pH 4 for 16 h, net H+ influx in JBM 1 was twice that of the parent strain. H+ flux stabilisation at pH 6 after acid stress took more time in the cfa- mutant. The data suggest increased proton permeability and decreased ability to extrude H+ in the absence of CFA, and they support the hypothesis that CFAs protect E. coli in acidic environments by decreasing membrane permeability to H+. Crown Copyright © 2008.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Biological Sciences |
| Research Group: | Microbiology |
| Research Field: | Microbial Ecology |
| Objective Division: | Health |
| Objective Group: | Public Health (excl. Specific Population Health) |
| Objective Field: | Food Safety |
| Author: | Shabala, Lana (Dr Lana Shabala) |
| Author: | Ross, T (Associate Professor Tom Ross) |
| ID Code: | 49545 |
| Year Published: | 2008 |
| Web of Science® Times Cited: | 41 |
| Deposited By: | Agricultural Science |
| Deposited On: | 2008-08-01 |
| Last Modified: | 2015-02-02 |
| Downloads: | 0 |
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