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Volume 153, Issue 1

Proteomic identification and characterization of bacterial factors associated with survival in a murine host Free

Abstract

is a member of the complex, a diverse family of Gram-negative bacteria that are serious respiratory pathogens in immunocompromised patients and individuals with cystic fibrosis. To identify putative bacterial virulence determinants, proteomic profiles were compared between two isolates that demonstrated differential persistence in a mouse model of pulmonary infection; clinical isolate C1394 is rapidly cleared from the murine lung whereas the strain variant, C1394mp2, persists. Two-dimensional (2D) gel electrophoresis was used to identify candidate proteins involved in survival in a susceptible host. The 2D proteome of the persistent isolate (C1394mp2) revealed loss of an alkyl hydroperoxide reductase subunit C (AhpC) protein spot and increased production of flagellin proteins. Loss of AhpC expression in C1394mp2 correlated with enhanced susceptibility to oxidative stress. C1394mp2 expressed increased flagellin production and enhanced swimming motility, traits that were subject to regulation by heat and low pH. Together, these results revealed differential expression and stress regulation of putative virulence determinants associated with persistence in a susceptible host.

  • Received:
  • Accepted:
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  • Published Online:
Keyword(s): AhpC, alkyl hydroperoxide reductase subunit C , ASL, airway surface liquid , BCC, Burkholderia cepacia complex , CF, cystic fibrosis , EPS, exopolysaccharide , IM, inner membrane , OM, outer membrane and RNI, reactive nitrogen intermediates
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2007-01-01
2024-04-20
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Proteomic identification and characterization of bacterial factors associated with Burkholderia cenocepacia survival in a murine host
Microbiology 153, 206 (2007); https://doi.org/10.1099/mic.0.2006/000455-0
/content/journal/micro/10.1099/mic.0.2006/000455-0
/content/journal/micro/10.1099/mic.0.2006/000455-0
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