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A more recent version of this article appeared on May 1, 2007

Papers In Press, published online ahead of print February 1, 2007
J. Lipid Res., doi:10.1194/jlr.M600323-JLR200
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Submitted on July 20, 2006
Revised on January 16, 2007
Accepted on February 1, 2007

Detailed characterisation of the Lipid A fraction from the non-pathogen Acinetobacter radioresistens strain S13

Serena Leone, Luisa Sturiale, Enrica Pessione, Roberto Mazzoli, Carlo Giunta, Rosa Lanzetta, Domenico Garozzo, Antonio Molinaro, and Michelangelo Parrilli

Chimica Organica e Biochimica, University of Naples Federico II, Napoli 80126

Corresponding Author: molinaro{at}unina.it

Acinetobacter genus is composed by ubiquitous, generally non-pathogen, environmental bacteria. The interest concerning these microrganisms has been rising during the last thirty years, due to the fact that some strains, belonging to the so called A. baumannii - A. calcoaceticus complex, have been identified in correspondence of severe pathological states in debilitated and hospitalised patients. The involvement of lipopolysaccharides (LPS) as virulence factors in infections by Acinetobacter has been proven, and ongoing studies are aimed towards the complete serological characterisation of the O-polysaccharides from the LPSs isolated in clinical samples. Conversely, no investigation upon the characterisation of Lipid A fraction from Acinetobacter strains have been performed yet. In the present paper, the detailed structure of the Lipid A fraction from an Acinetobacter species is for the first time reported, in particular the one from A. radioresistens S13. A. radioresistens strains have never been isolated in correspondence of infectious diseases. Nevertheless, it is known that the Lipid A structure is, with really minor variations, highly conserved among the genus, thus structure details acquired from studies on this non-pathogen strain can represent an useful frame for further studies on pathogen species.


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