PMID:16958852
| Citation |
Pepper, ED, Farrell, MJ and Finkel, SE (2006) Role of penicillin-binding protein 1b in competitive stationary-phase survival of Escherichia coli. FEMS Microbiol. Lett. 263:61-7 |
|---|---|
| Abstract |
The penicillin-binding proteins (PBPs) catalyze the synthesis and modification of bacterial cell wall peptidoglycan. Although the biochemical activities of these proteins have been determined in Escherichia coli, the physiological roles of many PBPs remain enigmatic. Previous studies have cast doubt on the individual importance of the majority of PBPs during log phase growth. We show here that PBP1b is vital for competitive survival of E. coli during extended stationary phase, but the other nine PBPs studied are dispensable. Loss of PBP1b leads to the stationary phase-specific competition defective phenotype and causes cells to become more sensitive to osmotic stress. Additionally, we present evidence that this protein, as well as AmpC, may assist in cellular resistance to beta-lactam antibiotics. |
| Links |
PubMed Online version:10.1111/j.1574-6968.2006.00418.x |
| Keywords |
Bacterial Proteins/physiology; Culture Media, Conditioned; Escherichia coli/growth & development; Escherichia coli/physiology; Escherichia coli Proteins/genetics; Escherichia coli Proteins/physiology; Microbial Sensitivity Tests; Microbial Viability; Mutation; Osmolar Concentration; Penicillin-Binding Proteins/genetics; Penicillin-Binding Proteins/physiology; Peptidoglycan Glycosyltransferase/genetics; Peptidoglycan Glycosyltransferase/physiology; Phenotype; Serine-Type D-Ala-D-Ala Carboxypeptidase/genetics; Serine-Type D-Ala-D-Ala Carboxypeptidase/physiology; beta-Lactam Resistance/physiology; beta-Lactamases/physiology |
| edit table |
Significance
You can help EcoliWiki by summarizing why this paper is useful
Useful Materials and Methods
You can help Ecoliwiki by describing the useful materials (strains, plasmids, antibodies, etc) described in this paper.
Annotations
<annotationlinks/>
EcoliWiki Links
Add links to pages that link here (e.g. gene, product, method pages)
References
See Help:References for how to manage references in EcoliWiki.