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The identification and evaluation of ATP binding cassette systems in the intracellular bacterium Francisella tularensis.

Abstract
Francisella tularensis is a facultative intracellular bacterium responsible for the disease tularemia. Analysis of the fully sequenced genome of the virulent F. tularensis strain SCHU S4 has led to the identification of twenty ATP binding cassette (ABC) systems, of which five appear to be non-functional. The fifteen complete systems comprise three importers, five exporters, four systems involved in non-transport processes, and three systems of unknown or ill-defined function. The number and classification of the ABC systems in F. tularensis is similar to that observed in other intracellular bacteria, indicating that some of these systems may be important for the intracellular lifestyle of these organisms. Among the ABC systems identified in the genome are systems that may be involved in the virulence of F. tularensis SCHU S4. Six ABC system proteins were evaluated as candidate vaccine antigens against tularemia, although none provided significant protection against F. tularensis. However, a greater understanding of these systems may lead to the development of countermeasures against F. tularensis.
AuthorsHelen S Atkins, Elie Dassa, Nicola J Walker, Kate F Griffin, David N Harland, Rosa R Taylor, Melanie L Duffield, Richard W Titball
JournalResearch in microbiology (Res Microbiol) 2006 Jul-Aug Vol. 157 Issue 6 Pg. 593-604 ISSN: 0923-2508 [Print] France
PMID16503121 (Publication Type: Journal Article)
Chemical References
  • ATP-Binding Cassette Transporters
  • Bacterial Vaccines
  • Vaccines, DNA
Topics
  • ATP-Binding Cassette Transporters (genetics, immunology, physiology)
  • Animals
  • Bacterial Typing Techniques
  • Bacterial Vaccines (immunology)
  • Biological Transport
  • Female
  • Francisella tularensis (genetics, immunology, metabolism)
  • Mice
  • Mice, Inbred BALB C
  • Phylogeny
  • Sequence Analysis, DNA
  • Vaccines, DNA (immunology)

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