Skip to main content
SLU publication database (SLUpub)

Research article2010Peer reviewedOpen access

Structural analysis of the lipid A isolated from Hafnia alvei 32 and PCM 1192 lipopolysaccharides

Lukasiewicz, Jolanta; Jachymek, Wojciech; Niedziela, Tomasz; Kenne, Lennart; Lugowski, Czeslaw

Abstract

Hafnia alvei, a Gram-negative bacterium, is an opportunistic pathogen associated with mixed hospital infections, bacteremia, septicemia, and respiratory diseases. The majority of clinical symptoms of diseases caused by this bacterium have a lipopolysaccharide (LPS, endotoxin)-related origin. The lipid A structure affects the biological activity of endotoxins predominantly. Thus, the structure of H. alvei lipid A was analyzed for the first time. The major form, asymmetrically hexa-acylated lipid A built of beta-D-GlcpN4P-(1 -> 6)-alpha-D-GlcpN1P substituted with (R)-14:0(3-OH) at N-2 and O-3, 14:0(3-(R)-O-12:0) at N-2', and 14:0(3-(R)-O-14:0) at O-3', was identified by ESI-MS(n) and MALDI-time-of-flight (TOF) MS. Comparative analysis performed by MS suggested that LPSs of H. alvei 32, PCM 1192, PCM 1206, and PCM 1207 share the identified structure of lipid A. LPSs of H. alvei are yet another example of enterobacterial endotoxins having the Escherichia coli-type structure of lipid A. The presence of hepta-acylated forms of H. alvei lipid A resulted from the addition of palmitate (16:0) substituting 14:0(3-OH) at N-2 of the alpha-GlcpN residue. All the studied strains of H. alvei have an ability to modify their lipid A structure by palmitoylation.-Lukasiewicz, J., W. Jachymek, T. Niedziela, L. Kenne, and C. Lugowski. Structural analysis of the lipid A isolated from Hafnia alvei 32 and PCM 1192 lipopolysaccharides. J. Lipid Res. 2010. 51: 564-574.

Keywords

Polish Collection of Microorganisms; endotoxin; mass spectrometry; palmitoylation

Published in

Journal of Lipid Research
2010, Volume: 51, number: 3, pages: 564-574
Publisher: AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC

    UKÄ Subject classification

    Food Science

    Publication identifier

    DOI: https://doi.org/10.1194/jlr.M001362

    Permanent link to this page (URI)

    https://res.slu.se/id/publ/48606